[1325] | 1 | //#--------------------------------------------------------------------------- |
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[1757] | 2 | //# SDFITSreader.cc: ATNF interface class for SDFITS input using CFITSIO. |
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[1325] | 3 | //#--------------------------------------------------------------------------- |
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[1757] | 4 | //# livedata - processing pipeline for single-dish, multibeam spectral data. |
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| 5 | //# Copyright (C) 2000-2009, Australia Telescope National Facility, CSIRO |
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[1325] | 6 | //# |
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[1757] | 7 | //# This file is part of livedata. |
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[1325] | 8 | //# |
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[1757] | 9 | //# livedata is free software: you can redistribute it and/or modify it under |
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| 10 | //# the terms of the GNU General Public License as published by the Free |
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| 11 | //# Software Foundation, either version 3 of the License, or (at your option) |
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| 12 | //# any later version. |
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| 13 | //# |
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| 14 | //# livedata is distributed in the hope that it will be useful, but WITHOUT |
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[1325] | 15 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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[1757] | 16 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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| 17 | //# more details. |
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[1325] | 18 | //# |
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[1757] | 19 | //# You should have received a copy of the GNU General Public License along |
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| 20 | //# with livedata. If not, see <http://www.gnu.org/licenses/>. |
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[1325] | 21 | //# |
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[1757] | 22 | //# Correspondence concerning livedata may be directed to: |
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| 23 | //# Internet email: mcalabre@atnf.csiro.au |
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| 24 | //# Postal address: Dr. Mark Calabretta |
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| 25 | //# Australia Telescope National Facility, CSIRO |
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| 26 | //# PO Box 76 |
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| 27 | //# Epping NSW 1710 |
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| 28 | //# AUSTRALIA |
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[1325] | 29 | //# |
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[1757] | 30 | //# http://www.atnf.csiro.au/computing/software/livedata.html |
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| 31 | //# $Id: SDFITSreader.cc,v 19.45 2009-09-30 07:23:48 cal103 Exp $ |
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[1325] | 32 | //#--------------------------------------------------------------------------- |
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| 33 | //# The SDFITSreader class reads single dish FITS files such as those written |
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| 34 | //# by SDFITSwriter containing Parkes Multibeam data. |
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| 35 | //# |
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| 36 | //# Original: 2000/08/09, Mark Calabretta, ATNF |
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| 37 | //#--------------------------------------------------------------------------- |
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| 38 | |
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[1757] | 39 | #include <atnf/pks/pks_maths.h> |
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| 40 | #include <atnf/PKSIO/MBrecord.h> |
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| 41 | #include <atnf/PKSIO/SDFITSreader.h> |
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[1325] | 42 | |
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[1757] | 43 | #include <casa/Logging/LogIO.h> |
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| 44 | #include <casa/Quanta/MVTime.h> |
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[1325] | 45 | #include <casa/math.h> |
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| 46 | #include <casa/stdio.h> |
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| 47 | |
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[1757] | 48 | #include <algorithm> |
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| 49 | #include <strings.h> |
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| 50 | #include <cstring> |
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[1325] | 51 | |
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| 52 | class FITSparm |
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| 53 | { |
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| 54 | public: |
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| 55 | char *name; // Keyword or column name. |
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| 56 | int type; // Expected keyvalue or column data type. |
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| 57 | int colnum; // Column number; 0 for keyword; -1 absent. |
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| 58 | int coltype; // Column data type, as found. |
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| 59 | long nelem; // Column data repeat count; < 0 for vardim. |
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| 60 | int tdimcol; // TDIM column number; 0 for keyword; -1 absent. |
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[1757] | 61 | char units[32]; // Units from TUNITn keyword. |
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[1325] | 62 | }; |
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| 63 | |
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| 64 | // Numerical constants. |
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| 65 | const double PI = 3.141592653589793238462643; |
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| 66 | |
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| 67 | // Factor to convert radians to degrees. |
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| 68 | const double D2R = PI / 180.0; |
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| 69 | |
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[1757] | 70 | // Class name |
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| 71 | const string className = "SDFITSreader" ; |
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| 72 | |
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| 73 | //---------------------------------------------------- SDFITSreader::(statics) |
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| 74 | |
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| 75 | int SDFITSreader::sInit = 1; |
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| 76 | int SDFITSreader::sReset = 0; |
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| 77 | int (*SDFITSreader::sALFAcalNon)[2] = (int (*)[2])(new float[16]); |
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| 78 | int (*SDFITSreader::sALFAcalNoff)[2] = (int (*)[2])(new float[16]); |
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| 79 | float (*SDFITSreader::sALFAcalOn)[2] = (float (*)[2])(new float[16]); |
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| 80 | float (*SDFITSreader::sALFAcalOff)[2] = (float (*)[2])(new float[16]); |
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| 81 | float (*SDFITSreader::sALFAcal)[2] = (float (*)[2])(new float[16]); |
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| 82 | |
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[1325] | 83 | //------------------------------------------------- SDFITSreader::SDFITSreader |
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| 84 | |
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| 85 | SDFITSreader::SDFITSreader() |
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| 86 | { |
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| 87 | // Default constructor. |
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[1757] | 88 | cSDptr = 0x0; |
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[1325] | 89 | |
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| 90 | // Allocate space for data descriptors. |
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| 91 | cData = new FITSparm[NDATA]; |
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| 92 | |
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| 93 | for (int iData = 0; iData < NDATA; iData++) { |
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| 94 | cData[iData].colnum = -1; |
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| 95 | } |
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| 96 | |
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| 97 | // Initialize pointers. |
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| 98 | cBeams = 0x0; |
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| 99 | cIFs = 0x0; |
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| 100 | cStartChan = 0x0; |
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| 101 | cEndChan = 0x0; |
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| 102 | cRefChan = 0x0; |
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[1757] | 103 | cPols = 0x0; |
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[1325] | 104 | } |
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| 105 | |
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| 106 | //------------------------------------------------ SDFITSreader::~SDFITSreader |
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| 107 | |
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| 108 | SDFITSreader::~SDFITSreader() |
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| 109 | { |
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| 110 | close(); |
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| 111 | |
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| 112 | delete [] cData; |
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| 113 | } |
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| 114 | |
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| 115 | //--------------------------------------------------------- SDFITSreader::open |
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| 116 | |
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| 117 | // Open an SDFITS file for reading. |
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| 118 | |
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| 119 | int SDFITSreader::open( |
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| 120 | char* sdName, |
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| 121 | int &nBeam, |
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| 122 | int* &beams, |
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| 123 | int &nIF, |
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| 124 | int* &IFs, |
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| 125 | int* &nChan, |
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| 126 | int* &nPol, |
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| 127 | int* &haveXPol, |
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| 128 | int &haveBase, |
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| 129 | int &haveSpectra, |
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| 130 | int &extraSysCal) |
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| 131 | { |
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[1757] | 132 | const string methodName = "open()" ; |
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| 133 | |
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[1325] | 134 | if (cSDptr) { |
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| 135 | close(); |
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| 136 | } |
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| 137 | |
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| 138 | // Open the SDFITS file. |
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| 139 | cStatus = 0; |
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| 140 | if (fits_open_file(&cSDptr, sdName, READONLY, &cStatus)) { |
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[1757] | 141 | sprintf(cMsg, "ERROR: Failed to open SDFITS file\n %s", sdName); |
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| 142 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, cMsg); |
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[1325] | 143 | return 1; |
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| 144 | } |
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| 145 | |
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| 146 | // Move to the SDFITS extension. |
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| 147 | cALFA = cALFA_BD = cALFA_CIMA = 0; |
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[2940] | 148 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"SINGLE DISH", 0, &cStatus)) { |
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[1325] | 149 | // No SDFITS table, look for BDFITS or CIMAFITS. |
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| 150 | cStatus = 0; |
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[2940] | 151 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"BDFITS", 0, &cStatus) == 0) { |
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[1325] | 152 | cALFA_BD = 1; |
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| 153 | |
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| 154 | } else { |
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| 155 | cStatus = 0; |
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[2940] | 156 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"CIMAFITS", 0, &cStatus) == 0) { |
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[1325] | 157 | cALFA_CIMA = 1; |
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| 158 | |
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[1757] | 159 | // Check for later versions of CIMAFITS. |
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| 160 | float version; |
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[2940] | 161 | readParm((char *)"VERSION", TFLOAT, &version); |
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[1757] | 162 | if (version >= 2.0f) cALFA_CIMA = int(version); |
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| 163 | |
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[1325] | 164 | } else { |
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[1757] | 165 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Failed to locate SDFITS binary table."); |
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[1325] | 166 | close(); |
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| 167 | return 1; |
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| 168 | } |
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| 169 | } |
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| 170 | |
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| 171 | // Arecibo ALFA data of some kind. |
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| 172 | cALFA = 1; |
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[1757] | 173 | if (sInit) { |
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| 174 | for (int iBeam = 0; iBeam < 8; iBeam++) { |
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| 175 | for (int iPol = 0; iPol < 2; iPol++) { |
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| 176 | sALFAcalOn[iBeam][iPol] = 0.0f; |
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| 177 | sALFAcalOff[iBeam][iPol] = 0.0f; |
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[1325] | 178 | |
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[1757] | 179 | // Nominal factor to calibrate spectra in Jy. |
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| 180 | sALFAcal[iBeam][iPol] = 3.0f; |
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| 181 | } |
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[1325] | 182 | } |
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[1757] | 183 | |
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| 184 | sInit = 0; |
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[1325] | 185 | } |
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| 186 | } |
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| 187 | |
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| 188 | // GBT data. |
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| 189 | char telescope[32]; |
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[2940] | 190 | readParm((char *)"TELESCOP", TSTRING, telescope); // Core. |
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[1325] | 191 | cGBT = strncmp(telescope, "GBT", 3) == 0 || |
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[2940] | 192 | strncmp(telescope, (char *)"NRAO_GBT", 8) == 0; |
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[1325] | 193 | |
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| 194 | |
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| 195 | // Check that the DATA array column is present. |
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[2940] | 196 | findData(DATA, (char *)"DATA", TFLOAT); |
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[1325] | 197 | haveSpectra = cHaveSpectra = cData[DATA].colnum > 0; |
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| 198 | |
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[1757] | 199 | cNAxisTime = 0; |
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[1325] | 200 | if (cHaveSpectra) { |
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| 201 | // Find the number of data axes (must be the same for each IF). |
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[1757] | 202 | cNAxes = 5; |
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| 203 | if (readDim(DATA, 1, &cNAxes, cNAxis)) { |
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| 204 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
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[1325] | 205 | close(); |
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| 206 | return 1; |
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| 207 | } |
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| 208 | |
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| 209 | if (cALFA_BD) { |
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[1757] | 210 | // ALFA BDFITS: variable length arrays don't actually vary and there is |
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[1325] | 211 | // no TDIM (or MAXISn) card; use the LAGS_IN value. |
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[1757] | 212 | cNAxes = 5; |
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[2940] | 213 | readParm((char *)"LAGS_IN", TLONG, cNAxis); |
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[1757] | 214 | cNAxis[1] = 1; |
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| 215 | cNAxis[2] = 1; |
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| 216 | cNAxis[3] = 1; |
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| 217 | cNAxis[4] = 1; |
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| 218 | cData[DATA].nelem = cNAxis[0]; |
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[1325] | 219 | } |
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| 220 | |
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[1757] | 221 | if (cNAxes < 4) { |
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[1325] | 222 | // Need at least four axes (for now). |
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[1757] | 223 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array contains fewer than four axes."); |
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[1325] | 224 | close(); |
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| 225 | return 1; |
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[1757] | 226 | } else if (cNAxes > 5) { |
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[1325] | 227 | // We support up to five axes. |
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[1757] | 228 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array contains more than five axes."); |
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[1325] | 229 | close(); |
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| 230 | return 1; |
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| 231 | } |
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| 232 | |
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[2940] | 233 | findData(FLAGGED, (char *)"FLAGGED", TBYTE); |
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[1325] | 234 | |
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| 235 | } else { |
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| 236 | // DATA column not present, check for a DATAXED keyword. |
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[2940] | 237 | findData(DATAXED, (char *)"DATAXED", TSTRING); |
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[1325] | 238 | if (cData[DATAXED].colnum < 0) { |
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[1757] | 239 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array column absent from binary table."); |
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[1325] | 240 | close(); |
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| 241 | return 1; |
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| 242 | } |
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| 243 | |
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| 244 | // Determine the number of axes and their length. |
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| 245 | char dataxed[32]; |
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[2940] | 246 | readParm((char *)"DATAXED", TSTRING, dataxed); |
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[1325] | 247 | |
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[1757] | 248 | for (int iaxis = 0; iaxis < 5; iaxis++) cNAxis[iaxis] = 0; |
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| 249 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxis, cNAxis+1, cNAxis+2, |
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| 250 | cNAxis+3, cNAxis+4); |
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[1325] | 251 | for (int iaxis = 4; iaxis > -1; iaxis--) { |
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[1757] | 252 | if (cNAxis[iaxis] == 0) cNAxes = iaxis; |
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[1325] | 253 | } |
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| 254 | } |
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| 255 | |
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[2940] | 256 | char *CTYPE[5] = {(char *)"CTYPE1", (char *)"CTYPE2", (char *)"CTYPE3", (char *)"CTYPE4", (char *)"CTYPE5"}; |
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| 257 | char *CRPIX[5] = {(char *)"CRPIX1", (char *)"CRPIX2", (char *)"CRPIX3", (char *)"CRPIX4", (char *)"CRPIX5"}; |
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| 258 | char *CRVAL[5] = {(char *)"CRVAL1", (char *)"CRVAL2", (char *)"CRVAL3", (char *)"CRVAL4", (char *)"CRVAL5"}; |
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| 259 | char *CDELT[5] = {(char *)"CDELT1", (char *)"CDELT2", (char *)"CDELT3", (char *)"CDELT4", (char *)"CDELT5"}; |
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[1325] | 260 | |
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| 261 | // Find required DATA array axes. |
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| 262 | char ctype[5][72]; |
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[1757] | 263 | for (int iaxis = 0; iaxis < cNAxes; iaxis++) { |
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[1325] | 264 | strcpy(ctype[iaxis], ""); |
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| 265 | readParm(CTYPE[iaxis], TSTRING, ctype[iaxis]); // Core. |
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| 266 | } |
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| 267 | |
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| 268 | if (cStatus) { |
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[1757] | 269 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
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[1325] | 270 | close(); |
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| 271 | return 1; |
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| 272 | } |
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| 273 | |
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| 274 | char *fqCRVAL = 0; |
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| 275 | char *fqCDELT = 0; |
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[1757] | 276 | char *fqCRPIX = 0; |
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[1325] | 277 | char *raCRVAL = 0; |
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| 278 | char *decCRVAL = 0; |
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| 279 | char *timeCRVAL = 0; |
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[1757] | 280 | char *timeCDELT = 0; |
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| 281 | char *timeCRPIX = 0; |
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[1325] | 282 | char *beamCRVAL = 0; |
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[1757] | 283 | char *polCRVAL = 0; |
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[1325] | 284 | |
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[1757] | 285 | cFreqAxis = -1; |
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| 286 | cStokesAxis = -1; |
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| 287 | cRaAxis = -1; |
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| 288 | cDecAxis = -1; |
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| 289 | cTimeAxis = -1; |
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| 290 | cBeamAxis = -1; |
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| 291 | |
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| 292 | for (int iaxis = 0; iaxis < cNAxes; iaxis++) { |
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[1325] | 293 | if (strncmp(ctype[iaxis], "FREQ", 4) == 0) { |
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[1757] | 294 | cFreqAxis = iaxis; |
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| 295 | fqCRVAL = CRVAL[iaxis]; |
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| 296 | fqCDELT = CDELT[iaxis]; |
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| 297 | fqCRPIX = CRPIX[iaxis]; |
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[1325] | 298 | |
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| 299 | } else if (strncmp(ctype[iaxis], "STOKES", 6) == 0) { |
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[1757] | 300 | cStokesAxis = iaxis; |
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| 301 | polCRVAL = CRVAL[iaxis]; |
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[1325] | 302 | |
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| 303 | } else if (strncmp(ctype[iaxis], "RA", 2) == 0) { |
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[1757] | 304 | cRaAxis = iaxis; |
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| 305 | raCRVAL = CRVAL[iaxis]; |
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[1325] | 306 | |
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| 307 | } else if (strncmp(ctype[iaxis], "DEC", 3) == 0) { |
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[1757] | 308 | cDecAxis = iaxis; |
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| 309 | decCRVAL = CRVAL[iaxis]; |
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[1325] | 310 | |
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| 311 | } else if (strcmp(ctype[iaxis], "TIME") == 0) { |
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[1757] | 312 | // TIME (UTC seconds since midnight); axis type, if present, takes |
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| 313 | // precedence over keyword. |
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| 314 | cTimeAxis = iaxis; |
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[1325] | 315 | timeCRVAL = CRVAL[iaxis]; |
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| 316 | |
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[1757] | 317 | // Check for non-degeneracy. |
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| 318 | if ((cNAxisTime = cNAxis[iaxis]) > 1) { |
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| 319 | timeCDELT = CDELT[iaxis]; |
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| 320 | timeCRPIX = CRPIX[iaxis]; |
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| 321 | sprintf(cMsg, "DATA array contains a TIME axis of length %ld.", |
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| 322 | cNAxisTime); |
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| 323 | //logMsg(cMsg); |
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| 324 | log(LogOrigin( className, methodName, WHERE ), LogIO::NORMAL, cMsg); |
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| 325 | } |
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| 326 | |
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[1325] | 327 | } else if (strcmp(ctype[iaxis], "BEAM") == 0) { |
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| 328 | // BEAM can be a keyword or axis type. |
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[1757] | 329 | cBeamAxis = iaxis; |
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[1325] | 330 | beamCRVAL = CRVAL[iaxis]; |
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| 331 | } |
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| 332 | } |
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| 333 | |
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| 334 | if (cALFA_BD) { |
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| 335 | // Fixed in ALFA CIMAFITS. |
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[1757] | 336 | cRaAxis = 2; |
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[2940] | 337 | raCRVAL = (char *)"CRVAL2A"; |
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[1325] | 338 | |
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[1757] | 339 | cDecAxis = 3; |
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[2940] | 340 | decCRVAL = (char *)"CRVAL3A"; |
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[1325] | 341 | } |
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| 342 | |
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[1757] | 343 | |
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| 344 | // Check that required axes are present. |
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| 345 | if (cFreqAxis < 0 || cStokesAxis < 0 || cRaAxis < 0 || cDecAxis < 0) { |
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| 346 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Could not find required DATA array axes."); |
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| 347 | close(); |
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| 348 | return 1; |
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[1325] | 349 | } |
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| 350 | |
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| 351 | // Set up machinery for data retrieval. |
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[2940] | 352 | findData(SCAN, (char *)"SCAN", TINT); // Shared. |
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| 353 | findData(CYCLE, (char *)"CYCLE", TINT); // Additional. |
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| 354 | findData(DATE_OBS, (char *)"DATE-OBS", TSTRING); // Core. |
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[1757] | 355 | |
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| 356 | if (cTimeAxis >= 0) { |
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| 357 | // The DATA array has a TIME axis. |
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| 358 | if (cNAxisTime > 1) { |
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| 359 | // Non-degenerate. |
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| 360 | findData(TimeRefVal, timeCRVAL, TDOUBLE); // Time reference value. |
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| 361 | findData(TimeDelt, timeCDELT, TDOUBLE); // Time increment. |
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| 362 | findData(TimeRefPix, timeCRPIX, TFLOAT); // Time reference pixel. |
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| 363 | } else { |
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| 364 | // Degenerate, treat its like a simple TIME keyword. |
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| 365 | findData(TIME, timeCRVAL, TDOUBLE); |
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| 366 | } |
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| 367 | |
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| 368 | } else { |
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[2940] | 369 | findData(TIME, (char *)"TIME", TDOUBLE); // Core. |
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[1757] | 370 | } |
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| 371 | |
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[2940] | 372 | findData(EXPOSURE, (char *)"EXPOSURE", TFLOAT); // Core. |
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| 373 | findData(OBJECT, (char *)"OBJECT", TSTRING); // Core. |
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| 374 | findData(OBJ_RA, (char *)"OBJ-RA", TDOUBLE); // Additional. |
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| 375 | findData(OBJ_DEC, (char *)"OBJ-DEC", TDOUBLE); // Additional. |
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| 376 | findData(RESTFRQ, (char *)"RESTFRQ", TDOUBLE); // Additional. |
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| 377 | findData(OBSMODE, (char *)"OBSMODE", TSTRING); // Shared. |
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[1325] | 378 | |
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[2940] | 379 | findData(BEAM, (char *)"BEAM", TSHORT); // Additional. |
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| 380 | findData(IF, (char *)"IF", TSHORT); // Additional. |
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[1325] | 381 | findData(FqRefVal, fqCRVAL, TDOUBLE); // Frequency reference value. |
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| 382 | findData(FqDelt, fqCDELT, TDOUBLE); // Frequency increment. |
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[1757] | 383 | findData(FqRefPix, fqCRPIX, TFLOAT); // Frequency reference pixel. |
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[1325] | 384 | findData(RA, raCRVAL, TDOUBLE); // Right ascension. |
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| 385 | findData(DEC, decCRVAL, TDOUBLE); // Declination. |
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[2940] | 386 | findData(SCANRATE, (char *)"SCANRATE", TFLOAT); // Additional. |
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[1325] | 387 | |
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[2940] | 388 | findData(TSYS, (char *)"TSYS", TFLOAT); // Core. |
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| 389 | findData(CALFCTR, (char *)"CALFCTR", TFLOAT); // Additional. |
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| 390 | findData(XCALFCTR, (char *)"XCALFCTR", TFLOAT); // Additional. |
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| 391 | findData(BASELIN, (char *)"BASELIN", TFLOAT); // Additional. |
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| 392 | findData(BASESUB, (char *)"BASESUB", TFLOAT); // Additional. |
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| 393 | findData(XPOLDATA, (char *)"XPOLDATA", TFLOAT); // Additional. |
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[1325] | 394 | |
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[2940] | 395 | findData(REFBEAM, (char *)"REFBEAM", TSHORT); // Additional. |
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| 396 | findData(TCAL, (char *)"TCAL", TFLOAT); // Shared. |
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| 397 | findData(TCALTIME, (char *)"TCALTIME", TSTRING); // Additional. |
---|
| 398 | findData(AZIMUTH, (char *)"AZIMUTH", TFLOAT); // Shared. |
---|
| 399 | findData(ELEVATIO, (char *)"ELEVATIO", TFLOAT); // Shared. |
---|
| 400 | findData(PARANGLE, (char *)"PARANGLE", TFLOAT); // Additional. |
---|
| 401 | findData(FOCUSAXI, (char *)"FOCUSAXI", TFLOAT); // Additional. |
---|
| 402 | findData(FOCUSTAN, (char *)"FOCUSTAN", TFLOAT); // Additional. |
---|
| 403 | findData(FOCUSROT, (char *)"FOCUSROT", TFLOAT); // Additional. |
---|
| 404 | findData(TAMBIENT, (char *)"TAMBIENT", TFLOAT); // Shared. |
---|
| 405 | findData(PRESSURE, (char *)"PRESSURE", TFLOAT); // Shared. |
---|
| 406 | findData(HUMIDITY, (char *)"HUMIDITY", TFLOAT); // Shared. |
---|
| 407 | findData(WINDSPEE, (char *)"WINDSPEE", TFLOAT); // Shared. |
---|
| 408 | findData(WINDDIRE, (char *)"WINDDIRE", TFLOAT); // Shared. |
---|
[1325] | 409 | |
---|
[1757] | 410 | findData(STOKES, polCRVAL, TINT); |
---|
[2940] | 411 | findData(SIG, (char *)"SIG", TSTRING); |
---|
| 412 | findData(CAL, (char *)"CAL", TSTRING); |
---|
[1757] | 413 | |
---|
[2940] | 414 | findData(RVSYS, (char *)"RVSYS", TDOUBLE); |
---|
| 415 | findData(VFRAME, (char *)"VFRAME", TDOUBLE); |
---|
| 416 | findData(VELDEF, (char *)"VELDEF", TSTRING); |
---|
[1757] | 417 | |
---|
[1325] | 418 | if (cStatus) { |
---|
[1757] | 419 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 420 | close(); |
---|
| 421 | return 1; |
---|
| 422 | } |
---|
| 423 | |
---|
| 424 | |
---|
| 425 | // Check for alternative column names. |
---|
| 426 | if (cALFA) { |
---|
| 427 | // ALFA data. |
---|
| 428 | cALFAscan = 0; |
---|
| 429 | cScanNo = 0; |
---|
[1757] | 430 | if (cALFA_CIMA) { |
---|
[2940] | 431 | findData(SCAN, (char *)"SCAN_ID", TINT); |
---|
[1757] | 432 | if (cALFA_CIMA > 1) { |
---|
| 433 | // Note that RECNUM increases by cNAxisTime per row. |
---|
[2940] | 434 | findData(CYCLE, (char *)"RECNUM", TINT); |
---|
[1757] | 435 | } else { |
---|
[2940] | 436 | findData(CYCLE, (char *)"SUBSCAN", TINT); |
---|
[1757] | 437 | } |
---|
| 438 | } else if (cALFA_BD) { |
---|
[2940] | 439 | findData(SCAN, (char *)"SCAN_NUMBER", TINT); |
---|
| 440 | findData(CYCLE, (char *)"PATTERN_NUMBER", TINT); |
---|
[1325] | 441 | } |
---|
| 442 | } else { |
---|
| 443 | readData(SCAN, 1, &cFirstScanNo); |
---|
| 444 | } |
---|
| 445 | |
---|
| 446 | cCycleNo = 0; |
---|
| 447 | cLastUTC = 0.0; |
---|
[1757] | 448 | for ( int i = 0 ; i < 4 ; i++ ) { |
---|
| 449 | cGLastUTC[i] = 0.0 ; |
---|
| 450 | cGLastScan[i] = -1 ; |
---|
| 451 | cGCycleNo[i] = 0 ; |
---|
| 452 | } |
---|
[1325] | 453 | |
---|
| 454 | // Beam number, 1-relative by default. |
---|
| 455 | cBeam_1rel = 1; |
---|
[1757] | 456 | if (cALFA) { |
---|
| 457 | // ALFA INPUT_ID, 0-relative (overrides BEAM column if present). |
---|
[2940] | 458 | findData(BEAM, (char *)"INPUT_ID", TSHORT); |
---|
[1757] | 459 | cBeam_1rel = 0; |
---|
| 460 | |
---|
| 461 | } else if (cData[BEAM].colnum < 0) { |
---|
[1325] | 462 | if (beamCRVAL) { |
---|
| 463 | // There is a BEAM axis. |
---|
| 464 | findData(BEAM, beamCRVAL, TDOUBLE); |
---|
| 465 | } else { |
---|
[1757] | 466 | // ms2sdfits output, 0-relative "feed" number. |
---|
[2940] | 467 | findData(BEAM, (char *)"MAIN_FEED1", TSHORT); |
---|
[1325] | 468 | cBeam_1rel = 0; |
---|
| 469 | } |
---|
| 470 | } |
---|
| 471 | |
---|
| 472 | // IF number, 1-relative by default. |
---|
| 473 | cIF_1rel = 1; |
---|
| 474 | if (cALFA && cData[IF].colnum < 0) { |
---|
| 475 | // ALFA data, 0-relative. |
---|
[1757] | 476 | if (cALFA_CIMA > 1) { |
---|
[2940] | 477 | findData(IF, (char *)"IFN", TSHORT); |
---|
[1757] | 478 | } else { |
---|
[2940] | 479 | findData(IF, (char *)"IFVAL", TSHORT); |
---|
[1757] | 480 | } |
---|
[1325] | 481 | cIF_1rel = 0; |
---|
| 482 | } |
---|
| 483 | |
---|
| 484 | // ms2sdfits writes a scalar "TSYS" column that averages the polarizations. |
---|
| 485 | int colnum; |
---|
[2940] | 486 | findCol((char *)"SYSCAL_TSYS", &colnum); |
---|
[1325] | 487 | if (colnum > 0) { |
---|
| 488 | // This contains the vector Tsys. |
---|
[2940] | 489 | findData(TSYS, (char *)"SYSCAL_TSYS", TFLOAT); |
---|
[1325] | 490 | } |
---|
| 491 | |
---|
| 492 | // XPOLDATA? |
---|
| 493 | |
---|
| 494 | if (cData[SCANRATE].colnum < 0) { |
---|
[2940] | 495 | findData(SCANRATE, (char *)"FIELD_POINTING_DIR_RATE", TFLOAT); |
---|
[1325] | 496 | } |
---|
| 497 | |
---|
| 498 | if (cData[RESTFRQ].colnum < 0) { |
---|
[2940] | 499 | findData(RESTFRQ, (char *)"RESTFREQ", TDOUBLE); |
---|
[1325] | 500 | if (cData[RESTFRQ].colnum < 0) { |
---|
[2940] | 501 | findData(RESTFRQ, (char *)"SPECTRAL_WINDOW_REST_FREQUENCY", TDOUBLE); |
---|
[1325] | 502 | } |
---|
| 503 | } |
---|
| 504 | |
---|
| 505 | if (cData[OBJ_RA].colnum < 0) { |
---|
[2940] | 506 | findData(OBJ_RA, (char *)"SOURCE_DIRECTION", TDOUBLE); |
---|
[1325] | 507 | } |
---|
| 508 | if (cData[OBJ_DEC].colnum < 0) { |
---|
[2940] | 509 | findData(OBJ_DEC, (char *)"SOURCE_DIRECTION", TDOUBLE); |
---|
[1325] | 510 | } |
---|
| 511 | |
---|
| 512 | // REFBEAM? |
---|
| 513 | |
---|
| 514 | if (cData[TCAL].colnum < 0) { |
---|
[2940] | 515 | findData(TCAL, (char *)"SYSCAL_TCAL", TFLOAT); |
---|
[1325] | 516 | } else if (cALFA_BD) { |
---|
| 517 | // ALFA BDFITS has a different TCAL with 64 elements - kill it! |
---|
[2940] | 518 | findData(TCAL, (char *)"NO NO NO", TFLOAT); |
---|
[1325] | 519 | } |
---|
| 520 | |
---|
| 521 | if (cALFA_BD) { |
---|
| 522 | // ALFA BDFITS. |
---|
[2940] | 523 | findData(AZIMUTH, (char *)(char *)"CRVAL2B", TFLOAT); |
---|
| 524 | findData(ELEVATIO, (char *)(char *)"CRVAL3B", TFLOAT); |
---|
[1325] | 525 | } |
---|
| 526 | |
---|
| 527 | if (cALFA) { |
---|
| 528 | // ALFA data. |
---|
[2940] | 529 | findData(PARANGLE, (char *)"PARA_ANG", TFLOAT); |
---|
[1325] | 530 | } |
---|
| 531 | |
---|
| 532 | if (cData[TAMBIENT].colnum < 0) { |
---|
[2940] | 533 | findData(TAMBIENT, (char *)"WEATHER_TEMPERATURE", TFLOAT); |
---|
[1325] | 534 | } |
---|
| 535 | |
---|
| 536 | if (cData[PRESSURE].colnum < 0) { |
---|
[2940] | 537 | findData(PRESSURE, (char *)"WEATHER_PRESSURE", TFLOAT); |
---|
[1325] | 538 | } |
---|
| 539 | |
---|
| 540 | if (cData[HUMIDITY].colnum < 0) { |
---|
[2940] | 541 | findData(HUMIDITY, (char *)"WEATHER_REL_HUMIDITY", TFLOAT); |
---|
[1325] | 542 | } |
---|
| 543 | |
---|
| 544 | if (cData[WINDSPEE].colnum < 0) { |
---|
[2940] | 545 | findData(WINDSPEE, (char *)"WEATHER_WIND_SPEED", TFLOAT); |
---|
[1325] | 546 | } |
---|
| 547 | |
---|
| 548 | if (cData[WINDDIRE].colnum < 0) { |
---|
[2940] | 549 | findData(WINDDIRE, (char *)"WEATHER_WIND_DIRECTION", TFLOAT); |
---|
[1325] | 550 | } |
---|
| 551 | |
---|
| 552 | |
---|
| 553 | // Find the number of rows. |
---|
| 554 | fits_get_num_rows(cSDptr, &cNRow, &cStatus); |
---|
| 555 | if (!cNRow) { |
---|
[1757] | 556 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Table contains no entries."); |
---|
[1325] | 557 | close(); |
---|
| 558 | return 1; |
---|
| 559 | } |
---|
| 560 | |
---|
| 561 | |
---|
| 562 | // Determine which beams are present in the data. |
---|
| 563 | if (cData[BEAM].colnum > 0) { |
---|
| 564 | short *beamCol = new short[cNRow]; |
---|
| 565 | short beamNul = 1; |
---|
| 566 | int anynul; |
---|
| 567 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
| 568 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
| 569 | delete [] beamCol; |
---|
[1757] | 570 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 571 | close(); |
---|
| 572 | return 1; |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | // Find the maximum beam number. |
---|
| 576 | cNBeam = cBeam_1rel - 1; |
---|
| 577 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 578 | if (beamCol[irow] > cNBeam) { |
---|
| 579 | cNBeam = beamCol[irow]; |
---|
| 580 | } |
---|
| 581 | |
---|
| 582 | // Check validity. |
---|
| 583 | if (beamCol[irow] < cBeam_1rel) { |
---|
| 584 | delete [] beamCol; |
---|
[1757] | 585 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "SDFITS file contains invalid beam number."); |
---|
[1325] | 586 | close(); |
---|
| 587 | return 1; |
---|
| 588 | } |
---|
| 589 | } |
---|
| 590 | |
---|
| 591 | if (!cBeam_1rel) cNBeam++; |
---|
| 592 | |
---|
| 593 | // Find all beams present in the data. |
---|
| 594 | cBeams = new int[cNBeam]; |
---|
| 595 | for (int ibeam = 0; ibeam < cNBeam; ibeam++) { |
---|
| 596 | cBeams[ibeam] = 0; |
---|
| 597 | } |
---|
| 598 | |
---|
| 599 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 600 | cBeams[beamCol[irow] - cBeam_1rel] = 1; |
---|
| 601 | } |
---|
| 602 | |
---|
| 603 | delete [] beamCol; |
---|
| 604 | |
---|
| 605 | } else { |
---|
| 606 | // No BEAM column. |
---|
| 607 | cNBeam = 1; |
---|
| 608 | cBeams = new int[1]; |
---|
| 609 | cBeams[0] = 1; |
---|
| 610 | } |
---|
| 611 | |
---|
| 612 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
| 613 | // modify its elements directly. |
---|
| 614 | nBeam = cNBeam; |
---|
| 615 | beams = cBeams; |
---|
| 616 | |
---|
| 617 | |
---|
| 618 | // Determine which IFs are present in the data. |
---|
| 619 | if (cData[IF].colnum > 0) { |
---|
| 620 | short *IFCol = new short[cNRow]; |
---|
| 621 | short IFNul = 1; |
---|
| 622 | int anynul; |
---|
| 623 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
| 624 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
| 625 | delete [] IFCol; |
---|
[1757] | 626 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 627 | close(); |
---|
| 628 | return 1; |
---|
| 629 | } |
---|
| 630 | |
---|
| 631 | // Find the maximum IF number. |
---|
| 632 | cNIF = cIF_1rel - 1; |
---|
| 633 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 634 | if (IFCol[irow] > cNIF) { |
---|
| 635 | cNIF = IFCol[irow]; |
---|
| 636 | } |
---|
| 637 | |
---|
| 638 | // Check validity. |
---|
| 639 | if (IFCol[irow] < cIF_1rel) { |
---|
| 640 | delete [] IFCol; |
---|
[1757] | 641 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "SDFITS file contains invalid IF number."); |
---|
[1325] | 642 | close(); |
---|
| 643 | return 1; |
---|
| 644 | } |
---|
| 645 | } |
---|
| 646 | |
---|
| 647 | if (!cIF_1rel) cNIF++; |
---|
| 648 | |
---|
| 649 | // Find all IFs present in the data. |
---|
| 650 | cIFs = new int[cNIF]; |
---|
| 651 | cNChan = new int[cNIF]; |
---|
| 652 | cNPol = new int[cNIF]; |
---|
| 653 | cHaveXPol = new int[cNIF]; |
---|
| 654 | cGetXPol = 0; |
---|
| 655 | |
---|
| 656 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
| 657 | cIFs[iIF] = 0; |
---|
| 658 | cNChan[iIF] = 0; |
---|
| 659 | cNPol[iIF] = 0; |
---|
| 660 | cHaveXPol[iIF] = 0; |
---|
| 661 | } |
---|
| 662 | |
---|
| 663 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 664 | int iIF = IFCol[irow] - cIF_1rel; |
---|
| 665 | if (cIFs[iIF] == 0) { |
---|
| 666 | cIFs[iIF] = 1; |
---|
| 667 | |
---|
| 668 | // Find the axis lengths. |
---|
| 669 | if (cHaveSpectra) { |
---|
| 670 | if (cData[DATA].nelem < 0) { |
---|
| 671 | // Variable dimension array. |
---|
[1757] | 672 | if (readDim(DATA, irow+1, &cNAxes, cNAxis)) { |
---|
| 673 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 674 | close(); |
---|
| 675 | return 1; |
---|
| 676 | } |
---|
| 677 | } |
---|
| 678 | |
---|
| 679 | } else { |
---|
| 680 | if (cData[DATAXED].colnum > 0) { |
---|
| 681 | char dataxed[32]; |
---|
[2940] | 682 | readParm((char *)"DATAXED", TSTRING, dataxed); |
---|
[1325] | 683 | |
---|
[1757] | 684 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxis, cNAxis+1, |
---|
| 685 | cNAxis+2, cNAxis+3, cNAxis+4); |
---|
[1325] | 686 | } |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | // Number of channels and polarizations. |
---|
[1757] | 690 | cNChan[iIF] = cNAxis[cFreqAxis]; |
---|
| 691 | cNPol[iIF] = cNAxis[cStokesAxis]; |
---|
[1325] | 692 | cHaveXPol[iIF] = 0; |
---|
| 693 | |
---|
| 694 | // Is cross-polarization data present? |
---|
| 695 | if (cData[XPOLDATA].colnum > 0) { |
---|
| 696 | // Check that it conforms. |
---|
| 697 | int nAxis; |
---|
| 698 | long nAxes[2]; |
---|
| 699 | |
---|
| 700 | if (readDim(XPOLDATA, irow+1, &nAxis, nAxes)) { |
---|
[1757] | 701 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE ); |
---|
[1325] | 702 | close(); |
---|
| 703 | return 1; |
---|
| 704 | } |
---|
| 705 | |
---|
| 706 | // Default is to get it if we have it. |
---|
| 707 | if (nAxis == 2 && |
---|
| 708 | nAxes[0] == 2 && |
---|
| 709 | nAxes[1] == cNChan[iIF]) { |
---|
| 710 | cGetXPol = cHaveXPol[iIF] = 1; |
---|
| 711 | } |
---|
| 712 | } |
---|
| 713 | } |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | delete [] IFCol; |
---|
| 717 | |
---|
| 718 | } else { |
---|
| 719 | // No IF column. |
---|
| 720 | cNIF = 1; |
---|
| 721 | cIFs = new int[1]; |
---|
| 722 | cIFs[0] = 1; |
---|
| 723 | |
---|
| 724 | cNChan = new int[1]; |
---|
| 725 | cNPol = new int[1]; |
---|
| 726 | cHaveXPol = new int[1]; |
---|
| 727 | cGetXPol = 0; |
---|
| 728 | |
---|
| 729 | // Number of channels and polarizations. |
---|
[1757] | 730 | cNChan[0] = cNAxis[cFreqAxis]; |
---|
| 731 | cNPol[0] = cNAxis[cStokesAxis]; |
---|
[1325] | 732 | cHaveXPol[0] = 0; |
---|
| 733 | } |
---|
| 734 | |
---|
[1757] | 735 | if (cALFA && cALFA_CIMA < 2) { |
---|
| 736 | // Older ALFA data labels each polarization as a separate IF. |
---|
[1325] | 737 | cNPol[0] = cNIF; |
---|
| 738 | cNIF = 1; |
---|
| 739 | } |
---|
| 740 | |
---|
[1757] | 741 | // For GBT data that stores spectra for each polarization in separate rows |
---|
| 742 | if ( cData[STOKES].colnum > 0 ) { |
---|
| 743 | int *stokesCol = new int[cNRow]; |
---|
| 744 | int stokesNul = 1; |
---|
| 745 | int anynul; |
---|
| 746 | if (fits_read_col(cSDptr, TINT, cData[STOKES].colnum, 1, 1, cNRow, |
---|
| 747 | &stokesNul, stokesCol, &anynul, &cStatus)) { |
---|
| 748 | delete [] stokesCol; |
---|
| 749 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
| 750 | close(); |
---|
| 751 | return 1; |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | vector<int> pols ; |
---|
| 755 | pols.push_back( stokesCol[0] ) ; |
---|
| 756 | for ( int i = 0 ; i < cNRow ; i++ ) { |
---|
| 757 | bool pmatch = false ; |
---|
| 758 | for ( uint j = 0 ; j < pols.size() ; j++ ) { |
---|
| 759 | if ( stokesCol[i] == pols[j] ) { |
---|
| 760 | pmatch = true ; |
---|
| 761 | break ; |
---|
| 762 | } |
---|
| 763 | } |
---|
| 764 | if ( !pmatch ) { |
---|
| 765 | pols.push_back( stokesCol[i] ) ; |
---|
| 766 | } |
---|
| 767 | } |
---|
| 768 | |
---|
| 769 | cPols = new int[pols.size()] ; |
---|
| 770 | for ( uint i = 0 ; i < pols.size() ; i++ ) { |
---|
| 771 | cPols[i] = pols[i] ; |
---|
| 772 | } |
---|
| 773 | |
---|
| 774 | for ( int i = 0 ; i < cNIF ; i++ ) { |
---|
| 775 | cNPol[i] = pols.size() ; |
---|
| 776 | } |
---|
| 777 | |
---|
| 778 | delete [] stokesCol ; |
---|
| 779 | } |
---|
| 780 | |
---|
[1325] | 781 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
| 782 | // modify its elements directly. |
---|
| 783 | nIF = cNIF; |
---|
| 784 | IFs = cIFs; |
---|
| 785 | |
---|
| 786 | nChan = cNChan; |
---|
| 787 | nPol = cNPol; |
---|
| 788 | haveXPol = cHaveXPol; |
---|
| 789 | |
---|
| 790 | |
---|
| 791 | // Default channel range selection. |
---|
| 792 | cStartChan = new int[cNIF]; |
---|
| 793 | cEndChan = new int[cNIF]; |
---|
| 794 | cRefChan = new int[cNIF]; |
---|
| 795 | |
---|
| 796 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
| 797 | cStartChan[iIF] = 1; |
---|
| 798 | cEndChan[iIF] = cNChan[iIF]; |
---|
| 799 | cRefChan[iIF] = cNChan[iIF]/2 + 1; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | // Default is to get it if we have it. |
---|
| 803 | cGetSpectra = cHaveSpectra; |
---|
| 804 | |
---|
| 805 | |
---|
| 806 | // Are baseline parameters present? |
---|
| 807 | cHaveBase = 0; |
---|
| 808 | if (cData[BASELIN].colnum) { |
---|
| 809 | // Check that it conforms. |
---|
| 810 | int nAxis, status = 0; |
---|
| 811 | long nAxes[2]; |
---|
| 812 | |
---|
| 813 | if (fits_read_tdim(cSDptr, cData[BASELIN].colnum, 2, &nAxis, nAxes, |
---|
| 814 | &status) == 0) { |
---|
| 815 | cHaveBase = (nAxis == 2); |
---|
| 816 | } |
---|
| 817 | } |
---|
| 818 | haveBase = cHaveBase; |
---|
| 819 | |
---|
| 820 | |
---|
| 821 | // Is extra system calibration data available? |
---|
| 822 | cExtraSysCal = 0; |
---|
| 823 | for (int iparm = REFBEAM; iparm < NDATA; iparm++) { |
---|
| 824 | if (cData[iparm].colnum >= 0) { |
---|
| 825 | cExtraSysCal = 1; |
---|
| 826 | break; |
---|
| 827 | } |
---|
| 828 | } |
---|
| 829 | |
---|
| 830 | extraSysCal = cExtraSysCal; |
---|
| 831 | |
---|
[1757] | 832 | |
---|
| 833 | // Extras for ALFA data. |
---|
| 834 | cALFAacc = 0.0f; |
---|
| 835 | if (cALFA_CIMA > 1) { |
---|
| 836 | // FFTs per second when the Mock correlator operates in RFI blanking mode. |
---|
[2940] | 837 | readData((char *)"PHFFTACC", TFLOAT, 0, &cALFAacc); |
---|
[1757] | 838 | } |
---|
| 839 | |
---|
| 840 | |
---|
| 841 | cRow = 0; |
---|
| 842 | cTimeIdx = cNAxisTime; |
---|
| 843 | |
---|
[1325] | 844 | return 0; |
---|
| 845 | } |
---|
| 846 | |
---|
| 847 | //---------------------------------------------------- SDFITSreader::getHeader |
---|
| 848 | |
---|
| 849 | // Get parameters describing the data. |
---|
| 850 | |
---|
| 851 | int SDFITSreader::getHeader( |
---|
| 852 | char observer[32], |
---|
| 853 | char project[32], |
---|
| 854 | char telescope[32], |
---|
| 855 | double antPos[3], |
---|
| 856 | char obsMode[32], |
---|
[1757] | 857 | char bunit[32], |
---|
[1325] | 858 | float &equinox, |
---|
| 859 | char radecsys[32], |
---|
| 860 | char dopplerFrame[32], |
---|
| 861 | char datobs[32], |
---|
| 862 | double &utc, |
---|
| 863 | double &refFreq, |
---|
| 864 | double &bandwidth) |
---|
| 865 | { |
---|
[1757] | 866 | const string methodName = "getHeader()" ; |
---|
| 867 | |
---|
[1325] | 868 | // Has the file been opened? |
---|
| 869 | if (!cSDptr) { |
---|
| 870 | return 1; |
---|
| 871 | } |
---|
| 872 | |
---|
| 873 | // Read parameter values. |
---|
[2940] | 874 | readParm((char *)"OBSERVER", TSTRING, observer); // Shared. |
---|
| 875 | readParm((char *)"PROJID", TSTRING, project); // Shared. |
---|
| 876 | readParm((char *)"TELESCOP", TSTRING, telescope); // Core. |
---|
[1325] | 877 | |
---|
| 878 | antPos[0] = 0.0; |
---|
| 879 | antPos[1] = 0.0; |
---|
| 880 | antPos[2] = 0.0; |
---|
[2940] | 881 | if (readParm((char *)"ANTENNA_POSITION", TDOUBLE, antPos)) { |
---|
| 882 | readParm((char *)"OBSGEO-X", TDOUBLE, antPos); // Additional. |
---|
| 883 | readParm((char *)"OBSGEO-Y", TDOUBLE, antPos + 1); // Additional. |
---|
| 884 | readParm((char *)"OBSGEO-Z", TDOUBLE, antPos + 2); // Additional. |
---|
[1325] | 885 | } |
---|
| 886 | |
---|
| 887 | if (antPos[0] == 0.0) { |
---|
| 888 | if (strncmp(telescope, "ATPKS", 5) == 0) { |
---|
| 889 | // Parkes coordinates. |
---|
| 890 | antPos[0] = -4554232.087; |
---|
| 891 | antPos[1] = 2816759.046; |
---|
| 892 | antPos[2] = -3454035.950; |
---|
| 893 | } else if (strncmp(telescope, "ATMOPRA", 7) == 0) { |
---|
| 894 | // Mopra coordinates. |
---|
| 895 | antPos[0] = -4682768.630; |
---|
| 896 | antPos[1] = 2802619.060; |
---|
| 897 | antPos[2] = -3291759.900; |
---|
| 898 | } else if (strncmp(telescope, "ARECIBO", 7) == 0) { |
---|
| 899 | // Arecibo coordinates. |
---|
| 900 | antPos[0] = 2390486.900; |
---|
| 901 | antPos[1] = -5564731.440; |
---|
| 902 | antPos[2] = 1994720.450; |
---|
| 903 | } |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | readData(OBSMODE, 1, obsMode); // Shared. |
---|
| 907 | |
---|
[1757] | 908 | // Brightness unit. |
---|
| 909 | if (cData[DATAXED].colnum >= 0) { |
---|
| 910 | strcpy(bunit, "Jy"); |
---|
| 911 | } else { |
---|
| 912 | strcpy(bunit, cData[DATA].units); |
---|
| 913 | } |
---|
| 914 | |
---|
| 915 | if (strcmp(bunit, "JY") == 0) { |
---|
| 916 | bunit[1] = 'y'; |
---|
| 917 | } else if (strcmp(bunit, "JY/BEAM") == 0) { |
---|
| 918 | strcpy(bunit, "Jy/beam"); |
---|
| 919 | } |
---|
| 920 | |
---|
[2940] | 921 | readParm((char *)"EQUINOX", TFLOAT, &equinox); // Shared. |
---|
[1325] | 922 | if (cStatus == 405) { |
---|
| 923 | // EQUINOX was written as string value in early versions. |
---|
| 924 | cStatus = 0; |
---|
| 925 | char strtmp[32]; |
---|
[2940] | 926 | readParm((char *)"EQUINOX", TSTRING, strtmp); |
---|
[1325] | 927 | sscanf(strtmp, "%f", &equinox); |
---|
| 928 | } |
---|
| 929 | |
---|
[2940] | 930 | if (readParm((char *)"RADESYS", TSTRING, radecsys)) { // Additional. |
---|
| 931 | if (readParm((char *)"RADECSYS", TSTRING, radecsys)) { // Additional. |
---|
[1325] | 932 | strcpy(radecsys, ""); |
---|
| 933 | } |
---|
| 934 | } |
---|
| 935 | |
---|
[2940] | 936 | if (readParm((char *)"SPECSYS", TSTRING, dopplerFrame)) { // Additional. |
---|
[1325] | 937 | // Fallback value. |
---|
| 938 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
| 939 | |
---|
| 940 | // Look for VELFRAME, written by earlier versions of Livedata. |
---|
[1757] | 941 | // |
---|
| 942 | // Added few more codes currently (as of 2009 Oct) used in the GBT |
---|
| 943 | // SDFITS (based io_sdfits_define.pro of GBTIDL). - TT |
---|
[2940] | 944 | if (readParm((char *)"VELFRAME", TSTRING, dopplerFrame)) { // Additional. |
---|
[1325] | 945 | // No, try digging it out of the CTYPE card (AIPS convention). |
---|
| 946 | char keyw[9], ctype[9]; |
---|
[1757] | 947 | sprintf(keyw, "CTYPE%ld", cFreqAxis+1); |
---|
[1325] | 948 | readParm(keyw, TSTRING, ctype); |
---|
| 949 | |
---|
| 950 | if (strncmp(ctype, "FREQ-", 5) == 0) { |
---|
| 951 | strcpy(dopplerFrame, ctype+5); |
---|
| 952 | if (strcmp(dopplerFrame, "LSR") == 0) { |
---|
| 953 | // LSR unqualified usually means LSR (kinematic). |
---|
| 954 | strcpy(dopplerFrame, "LSRK"); |
---|
[1757] | 955 | } else if (strcmp(dopplerFrame, "LSD") == 0) { |
---|
| 956 | // LSR as a dynamical defintion |
---|
| 957 | strcpy(dopplerFrame, "LSRD"); |
---|
[1325] | 958 | } else if (strcmp(dopplerFrame, "HEL") == 0) { |
---|
| 959 | // Almost certainly barycentric. |
---|
| 960 | strcpy(dopplerFrame, "BARYCENT"); |
---|
[1757] | 961 | } else if (strcmp(dopplerFrame, "BAR") == 0) { |
---|
| 962 | // barycentric. |
---|
| 963 | strcpy(dopplerFrame, "BARYCENT"); |
---|
| 964 | } else if (strcmp(dopplerFrame, "OBS") == 0) { |
---|
| 965 | // observed or topocentric. |
---|
| 966 | strcpy(dopplerFrame, "TOPO"); |
---|
| 967 | } else if (strcmp(dopplerFrame, "GEO") == 0) { |
---|
| 968 | // geocentric |
---|
| 969 | strcpy(dopplerFrame, "GEO"); |
---|
| 970 | } else if (strcmp(dopplerFrame, "GAL") == 0) { |
---|
| 971 | // galactic |
---|
| 972 | strcpy(dopplerFrame, "GAL"); |
---|
| 973 | } else if (strcmp(dopplerFrame, "LGR") == 0) { |
---|
| 974 | // Local group |
---|
| 975 | strcpy(dopplerFrame, "LGROUP"); |
---|
| 976 | } else if (strcmp(dopplerFrame, "CMB") == 0) { |
---|
| 977 | // Cosimic Microwave Backgroup |
---|
| 978 | strcpy(dopplerFrame, "CMB"); |
---|
[1325] | 979 | } |
---|
| 980 | } else { |
---|
| 981 | strcpy(dopplerFrame, ""); |
---|
| 982 | } |
---|
| 983 | } |
---|
| 984 | // Translate to FITS standard names. |
---|
| 985 | if (strncmp(dopplerFrame, "TOP", 3) == 0) { |
---|
| 986 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
| 987 | } else if (strncmp(dopplerFrame, "GEO", 3) == 0) { |
---|
| 988 | strcpy(dopplerFrame, "GEOCENTR"); |
---|
| 989 | } else if (strncmp(dopplerFrame, "HEL", 3) == 0) { |
---|
| 990 | strcpy(dopplerFrame, "HELIOCEN"); |
---|
| 991 | } else if (strncmp(dopplerFrame, "BARY", 4) == 0) { |
---|
| 992 | strcpy(dopplerFrame, "BARYCENT"); |
---|
[1757] | 993 | } else if (strncmp(dopplerFrame, "GAL", 3) == 0) { |
---|
| 994 | strcpy(dopplerFrame, "GALACTOC"); |
---|
| 995 | } else if (strncmp(dopplerFrame, "LGROUP", 6) == 0) { |
---|
| 996 | strcpy(dopplerFrame, "LOCALGRP"); |
---|
| 997 | } else if (strncmp(dopplerFrame, "CMB", 3) == 0) { |
---|
| 998 | strcpy(dopplerFrame, "CMBDIPOL"); |
---|
[1325] | 999 | } |
---|
| 1000 | } |
---|
[1757] | 1001 | |
---|
[1325] | 1002 | if (cStatus) { |
---|
[1757] | 1003 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1004 | return 1; |
---|
| 1005 | } |
---|
| 1006 | |
---|
| 1007 | // Get parameters from first row of table. |
---|
[1757] | 1008 | readTime(1, 1, datobs, utc); |
---|
[1325] | 1009 | readData(FqRefVal, 1, &refFreq); |
---|
[2940] | 1010 | readParm((char *)"BANDWID", TDOUBLE, &bandwidth); // Core. |
---|
[1325] | 1011 | |
---|
| 1012 | if (cStatus) { |
---|
[1757] | 1013 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1014 | return 1; |
---|
| 1015 | } |
---|
| 1016 | |
---|
| 1017 | return 0; |
---|
| 1018 | } |
---|
| 1019 | |
---|
| 1020 | //-------------------------------------------------- SDFITSreader::getFreqInfo |
---|
| 1021 | |
---|
| 1022 | // Get frequency parameters for each IF. |
---|
| 1023 | |
---|
| 1024 | int SDFITSreader::getFreqInfo( |
---|
| 1025 | int &nIF, |
---|
| 1026 | double* &startFreq, |
---|
| 1027 | double* &endFreq) |
---|
| 1028 | { |
---|
[1757] | 1029 | const string methodName = "getFreqInfo()" ; |
---|
| 1030 | |
---|
[1325] | 1031 | float fqRefPix; |
---|
| 1032 | double fqDelt, fqRefVal; |
---|
| 1033 | |
---|
| 1034 | nIF = cNIF; |
---|
| 1035 | startFreq = new double[nIF]; |
---|
| 1036 | endFreq = new double[nIF]; |
---|
| 1037 | |
---|
| 1038 | if (cData[IF].colnum > 0) { |
---|
| 1039 | short *IFCol = new short[cNRow]; |
---|
| 1040 | short IFNul = 1; |
---|
| 1041 | int anynul; |
---|
| 1042 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
| 1043 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
| 1044 | delete [] IFCol; |
---|
[1757] | 1045 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1046 | close(); |
---|
| 1047 | return 1; |
---|
| 1048 | } |
---|
| 1049 | |
---|
| 1050 | for (int iIF = 0; iIF < nIF; iIF++) { |
---|
| 1051 | if (cIFs[iIF]) { |
---|
| 1052 | // Find the first occurrence of this IF in the table. |
---|
| 1053 | int IFno = iIF + cIF_1rel; |
---|
| 1054 | for (int irow = 0; irow < cNRow;) { |
---|
| 1055 | if (IFCol[irow++] == IFno) { |
---|
| 1056 | readData(FqRefPix, irow, &fqRefPix); |
---|
| 1057 | readData(FqRefVal, irow, &fqRefVal); |
---|
| 1058 | readData(FqDelt, irow, &fqDelt); |
---|
| 1059 | |
---|
| 1060 | if (cALFA_BD) { |
---|
| 1061 | unsigned char invert; |
---|
[2940] | 1062 | readData((char *)"UPPERSB", TBYTE, irow, &invert); |
---|
[1325] | 1063 | |
---|
| 1064 | if (invert) { |
---|
| 1065 | fqDelt = -fqDelt; |
---|
| 1066 | } |
---|
| 1067 | } |
---|
| 1068 | |
---|
| 1069 | startFreq[iIF] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
| 1070 | endFreq[iIF] = fqRefVal + (cNChan[iIF] - fqRefPix) * fqDelt; |
---|
| 1071 | |
---|
| 1072 | break; |
---|
| 1073 | } |
---|
| 1074 | } |
---|
| 1075 | |
---|
| 1076 | } else { |
---|
| 1077 | startFreq[iIF] = 0.0; |
---|
| 1078 | endFreq[iIF] = 0.0; |
---|
| 1079 | } |
---|
| 1080 | } |
---|
| 1081 | |
---|
| 1082 | delete [] IFCol; |
---|
| 1083 | |
---|
| 1084 | } else { |
---|
| 1085 | // No IF column, read the first table entry. |
---|
| 1086 | readData(FqRefPix, 1, &fqRefPix); |
---|
| 1087 | readData(FqRefVal, 1, &fqRefVal); |
---|
| 1088 | readData(FqDelt, 1, &fqDelt); |
---|
| 1089 | |
---|
| 1090 | startFreq[0] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
| 1091 | endFreq[0] = fqRefVal + (cNChan[0] - fqRefPix) * fqDelt; |
---|
| 1092 | } |
---|
| 1093 | |
---|
| 1094 | return cStatus; |
---|
| 1095 | } |
---|
| 1096 | |
---|
| 1097 | //---------------------------------------------------- SDFITSreader::findRange |
---|
| 1098 | |
---|
| 1099 | // Find the range of the data in time and position. |
---|
| 1100 | |
---|
| 1101 | int SDFITSreader::findRange( |
---|
| 1102 | int &nRow, |
---|
| 1103 | int &nSel, |
---|
| 1104 | char dateSpan[2][32], |
---|
| 1105 | double utcSpan[2], |
---|
| 1106 | double* &positions) |
---|
| 1107 | { |
---|
[1757] | 1108 | const string methodName = "findRange()" ; |
---|
[1325] | 1109 | |
---|
| 1110 | // Has the file been opened? |
---|
| 1111 | if (!cSDptr) { |
---|
| 1112 | return 1; |
---|
| 1113 | } |
---|
| 1114 | |
---|
| 1115 | nRow = cNRow; |
---|
| 1116 | |
---|
| 1117 | // Find the number of rows selected. |
---|
[1757] | 1118 | short *sel = new short[cNRow]; |
---|
| 1119 | for (int irow = 0; irow < cNRow; irow++) { |
---|
[1325] | 1120 | sel[irow] = 1; |
---|
| 1121 | } |
---|
| 1122 | |
---|
[1757] | 1123 | int anynul; |
---|
[1325] | 1124 | if (cData[BEAM].colnum > 0) { |
---|
| 1125 | short *beamCol = new short[cNRow]; |
---|
| 1126 | short beamNul = 1; |
---|
| 1127 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
| 1128 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
| 1129 | delete [] beamCol; |
---|
| 1130 | delete [] sel; |
---|
[1757] | 1131 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1132 | return 1; |
---|
| 1133 | } |
---|
| 1134 | |
---|
[1757] | 1135 | for (int irow = 0; irow < cNRow; irow++) { |
---|
[1325] | 1136 | if (!cBeams[beamCol[irow]-cBeam_1rel]) { |
---|
| 1137 | sel[irow] = 0; |
---|
| 1138 | } |
---|
| 1139 | } |
---|
| 1140 | |
---|
| 1141 | delete [] beamCol; |
---|
| 1142 | } |
---|
| 1143 | |
---|
| 1144 | if (cData[IF].colnum > 0) { |
---|
| 1145 | short *IFCol = new short[cNRow]; |
---|
| 1146 | short IFNul = 1; |
---|
| 1147 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
| 1148 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
| 1149 | delete [] IFCol; |
---|
| 1150 | delete [] sel; |
---|
[1757] | 1151 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1152 | return 1; |
---|
| 1153 | } |
---|
| 1154 | |
---|
[1757] | 1155 | for (int irow = 0; irow < cNRow; irow++) { |
---|
[1325] | 1156 | if (!cIFs[IFCol[irow]-cIF_1rel]) { |
---|
| 1157 | sel[irow] = 0; |
---|
| 1158 | } |
---|
| 1159 | } |
---|
| 1160 | |
---|
| 1161 | delete [] IFCol; |
---|
| 1162 | } |
---|
| 1163 | |
---|
| 1164 | nSel = 0; |
---|
[1757] | 1165 | for (int irow = 0; irow < cNRow; irow++) { |
---|
[1325] | 1166 | nSel += sel[irow]; |
---|
| 1167 | } |
---|
| 1168 | |
---|
| 1169 | |
---|
| 1170 | // Find the time range assuming the data is in chronological order. |
---|
[1757] | 1171 | readTime(1, 1, dateSpan[0], utcSpan[0]); |
---|
| 1172 | readTime(cNRow, cNAxisTime, dateSpan[1], utcSpan[1]); |
---|
[1325] | 1173 | |
---|
| 1174 | |
---|
[1757] | 1175 | // Retrieve positions for selected data. |
---|
| 1176 | int isel = 0; |
---|
| 1177 | positions = new double[2*nSel]; |
---|
[1325] | 1178 | |
---|
[1757] | 1179 | if (cCoordSys == 1) { |
---|
| 1180 | // Horizontal (Az,El). |
---|
| 1181 | if (cData[AZIMUTH].colnum < 0 || |
---|
| 1182 | cData[ELEVATIO].colnum < 0) { |
---|
| 1183 | log(LogOrigin( className, methodName, WHERE ), LogIO::WARN, "Azimuth/elevation information absent."); |
---|
| 1184 | cStatus = -1; |
---|
[1325] | 1185 | |
---|
[1757] | 1186 | } else { |
---|
| 1187 | float *az = new float[cNRow]; |
---|
| 1188 | float *el = new float[cNRow]; |
---|
| 1189 | readCol(AZIMUTH, az); |
---|
| 1190 | readCol(ELEVATIO, el); |
---|
[1325] | 1191 | |
---|
[1757] | 1192 | if (!cStatus) { |
---|
| 1193 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 1194 | if (sel[irow]) { |
---|
| 1195 | positions[isel++] = az[irow] * D2R; |
---|
| 1196 | positions[isel++] = el[irow] * D2R; |
---|
| 1197 | } |
---|
| 1198 | } |
---|
| 1199 | } |
---|
[1325] | 1200 | |
---|
[1757] | 1201 | delete [] az; |
---|
| 1202 | delete [] el; |
---|
[1325] | 1203 | } |
---|
| 1204 | |
---|
[1757] | 1205 | } else if (cCoordSys == 3) { |
---|
| 1206 | // ZPA-EL. |
---|
| 1207 | if (cData[BEAM].colnum < 0 || |
---|
| 1208 | cData[FOCUSROT].colnum < 0 || |
---|
| 1209 | cData[ELEVATIO].colnum < 0) { |
---|
| 1210 | log(LogOrigin( className, methodName, WHERE ), LogIO::WARN, "ZPA/elevation information absent."); |
---|
| 1211 | cStatus = -1; |
---|
[1325] | 1212 | |
---|
[1757] | 1213 | } else { |
---|
| 1214 | short *beam = new short[cNRow]; |
---|
| 1215 | float *rot = new float[cNRow]; |
---|
| 1216 | float *el = new float[cNRow]; |
---|
| 1217 | readCol(BEAM, beam); |
---|
| 1218 | readCol(FOCUSROT, rot); |
---|
| 1219 | readCol(ELEVATIO, el); |
---|
[1325] | 1220 | |
---|
[1757] | 1221 | if (!cStatus) { |
---|
| 1222 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 1223 | if (sel[irow]) { |
---|
| 1224 | Int beamNo = beam[irow]; |
---|
| 1225 | Double zpa = rot[irow]; |
---|
| 1226 | if (beamNo > 1) { |
---|
| 1227 | // Beam geometry for the Parkes multibeam. |
---|
| 1228 | if (beamNo < 8) { |
---|
| 1229 | zpa += -60.0 + 60.0*(beamNo-2); |
---|
| 1230 | } else { |
---|
| 1231 | zpa += -90.0 + 60.0*(beamNo-8); |
---|
| 1232 | } |
---|
[1325] | 1233 | |
---|
[1757] | 1234 | if (zpa < -180.0) { |
---|
| 1235 | zpa += 360.0; |
---|
| 1236 | } else if (zpa > 180.0) { |
---|
| 1237 | zpa -= 360.0; |
---|
| 1238 | } |
---|
| 1239 | } |
---|
[1325] | 1240 | |
---|
[1757] | 1241 | positions[isel++] = zpa * D2R; |
---|
| 1242 | positions[isel++] = el[irow] * D2R; |
---|
| 1243 | } |
---|
| 1244 | } |
---|
[1325] | 1245 | } |
---|
[1757] | 1246 | |
---|
| 1247 | delete [] beam; |
---|
| 1248 | delete [] rot; |
---|
| 1249 | delete [] el; |
---|
[1325] | 1250 | } |
---|
| 1251 | |
---|
[1757] | 1252 | } else { |
---|
| 1253 | double *ra = new double[cNRow]; |
---|
| 1254 | double *dec = new double[cNRow]; |
---|
| 1255 | readCol(RA, ra); |
---|
| 1256 | readCol(DEC, dec); |
---|
[1325] | 1257 | |
---|
[1757] | 1258 | if (cStatus) { |
---|
| 1259 | delete [] ra; |
---|
| 1260 | delete [] dec; |
---|
| 1261 | goto cleanup; |
---|
| 1262 | } |
---|
| 1263 | |
---|
| 1264 | if (cALFA_BD) { |
---|
| 1265 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 1266 | // Convert hours to degrees. |
---|
| 1267 | ra[irow] *= 15.0; |
---|
[1325] | 1268 | } |
---|
| 1269 | } |
---|
[1757] | 1270 | |
---|
| 1271 | if (cCoordSys == 0) { |
---|
| 1272 | // Equatorial (RA,Dec). |
---|
| 1273 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 1274 | if (sel[irow]) { |
---|
| 1275 | positions[isel++] = ra[irow] * D2R; |
---|
| 1276 | positions[isel++] = dec[irow] * D2R; |
---|
| 1277 | } |
---|
| 1278 | } |
---|
| 1279 | |
---|
| 1280 | } else if (cCoordSys == 2) { |
---|
| 1281 | // Feed-plane. |
---|
| 1282 | if (cData[OBJ_RA].colnum < 0 || |
---|
| 1283 | cData[OBJ_DEC].colnum < 0 || |
---|
| 1284 | cData[PARANGLE].colnum < 0 || |
---|
| 1285 | cData[FOCUSROT].colnum < 0) { |
---|
| 1286 | log( LogOrigin( className, methodName, WHERE ), LogIO::WARN, |
---|
| 1287 | "Insufficient information to compute feed-plane\n" |
---|
| 1288 | " coordinates."); |
---|
| 1289 | cStatus = -1; |
---|
| 1290 | |
---|
| 1291 | } else { |
---|
| 1292 | double *srcRA = new double[cNRow]; |
---|
| 1293 | double *srcDec = new double[cNRow]; |
---|
| 1294 | float *par = new float[cNRow]; |
---|
| 1295 | float *rot = new float[cNRow]; |
---|
| 1296 | |
---|
| 1297 | readCol(OBJ_RA, srcRA); |
---|
| 1298 | readCol(OBJ_DEC, srcDec); |
---|
| 1299 | readCol(PARANGLE, par); |
---|
| 1300 | readCol(FOCUSROT, rot); |
---|
| 1301 | |
---|
| 1302 | if (!cStatus) { |
---|
| 1303 | for (int irow = 0; irow < cNRow; irow++) { |
---|
| 1304 | if (sel[irow]) { |
---|
| 1305 | // Convert to feed-plane coordinates. |
---|
| 1306 | Double dist, pa; |
---|
| 1307 | distPA(ra[irow]*D2R, dec[irow]*D2R, srcRA[irow]*D2R, |
---|
| 1308 | srcDec[irow]*D2R, dist, pa); |
---|
| 1309 | |
---|
| 1310 | Double spin = (par[irow] + rot[irow])*D2R - pa; |
---|
| 1311 | if (spin > 2.0*PI) spin -= 2.0*PI; |
---|
| 1312 | Double squint = PI/2.0 - dist; |
---|
| 1313 | |
---|
| 1314 | positions[isel++] = spin; |
---|
| 1315 | positions[isel++] = squint; |
---|
| 1316 | } |
---|
| 1317 | } |
---|
| 1318 | } |
---|
| 1319 | |
---|
| 1320 | delete [] srcRA; |
---|
| 1321 | delete [] srcDec; |
---|
| 1322 | delete [] par; |
---|
| 1323 | delete [] rot; |
---|
| 1324 | } |
---|
| 1325 | } |
---|
| 1326 | |
---|
| 1327 | delete [] ra; |
---|
| 1328 | delete [] dec; |
---|
[1325] | 1329 | } |
---|
| 1330 | |
---|
[1757] | 1331 | cleanup: |
---|
[1325] | 1332 | delete [] sel; |
---|
| 1333 | |
---|
[1757] | 1334 | if (cStatus) { |
---|
| 1335 | nSel = 0; |
---|
| 1336 | delete [] positions; |
---|
| 1337 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
| 1338 | cStatus = 0; |
---|
| 1339 | return 1; |
---|
| 1340 | } |
---|
| 1341 | |
---|
| 1342 | return 0; |
---|
[1325] | 1343 | } |
---|
| 1344 | |
---|
| 1345 | |
---|
| 1346 | //--------------------------------------------------------- SDFITSreader::read |
---|
| 1347 | |
---|
| 1348 | // Read the next data record. |
---|
| 1349 | |
---|
| 1350 | int SDFITSreader::read( |
---|
[1757] | 1351 | MBrecord &mbrec) |
---|
[1325] | 1352 | { |
---|
[1757] | 1353 | const string methodName = "read()" ; |
---|
| 1354 | |
---|
[1325] | 1355 | // Has the file been opened? |
---|
| 1356 | if (!cSDptr) { |
---|
| 1357 | return 1; |
---|
| 1358 | } |
---|
| 1359 | // Find the next selected beam and IF. |
---|
| 1360 | short iBeam = 0, iIF = 0; |
---|
[1757] | 1361 | int iPol = -1 ; |
---|
| 1362 | while (1) { |
---|
| 1363 | if (++cTimeIdx > cNAxisTime) { |
---|
| 1364 | if (++cRow > cNRow) break; |
---|
| 1365 | cTimeIdx = 1; |
---|
| 1366 | } |
---|
| 1367 | |
---|
[1325] | 1368 | if (cData[BEAM].colnum > 0) { |
---|
| 1369 | readData(BEAM, cRow, &iBeam); |
---|
| 1370 | |
---|
| 1371 | // Convert to 0-relative. |
---|
| 1372 | if (cBeam_1rel) iBeam--; |
---|
| 1373 | } |
---|
| 1374 | |
---|
| 1375 | |
---|
| 1376 | if (cBeams[iBeam]) { |
---|
| 1377 | if (cData[IF].colnum > 0) { |
---|
| 1378 | readData(IF, cRow, &iIF); |
---|
| 1379 | |
---|
| 1380 | // Convert to 0-relative. |
---|
| 1381 | if (cIF_1rel) iIF--; |
---|
| 1382 | } |
---|
| 1383 | |
---|
| 1384 | if (cIFs[iIF]) { |
---|
| 1385 | if (cALFA) { |
---|
| 1386 | // ALFA data, check for calibration data. |
---|
| 1387 | char chars[32]; |
---|
| 1388 | readData(OBSMODE, cRow, chars); |
---|
[1757] | 1389 | if (strcmp(chars, "DROP") == 0) { |
---|
| 1390 | // Completely flagged integration. |
---|
[1325] | 1391 | continue; |
---|
[1757] | 1392 | |
---|
| 1393 | } else if (strcmp(chars, "CAL") == 0) { |
---|
| 1394 | sReset = 1; |
---|
| 1395 | if (cALFA_CIMA > 1) { |
---|
| 1396 | for (short iPol = 0; iPol < cNPol[iIF]; iPol++) { |
---|
| 1397 | alfaCal(iBeam, iIF, iPol); |
---|
| 1398 | } |
---|
| 1399 | continue; |
---|
| 1400 | } else { |
---|
| 1401 | // iIF is really the polarization in older ALFA data. |
---|
| 1402 | alfaCal(iBeam, 0, iIF); |
---|
| 1403 | continue; |
---|
| 1404 | } |
---|
| 1405 | |
---|
| 1406 | } else { |
---|
| 1407 | // Reset for the next CAL record. |
---|
| 1408 | if (sReset) { |
---|
| 1409 | for (short iPol = 0; iPol < cNPol[iIF]; iPol++) { |
---|
| 1410 | sALFAcalNon[iBeam][iPol] = 0; |
---|
| 1411 | sALFAcalNoff[iBeam][iPol] = 0; |
---|
| 1412 | sALFAcalOn[iBeam][iPol] = 0.0f; |
---|
| 1413 | sALFAcalOff[iBeam][iPol] = 0.0f; |
---|
| 1414 | } |
---|
| 1415 | sReset = 0; |
---|
| 1416 | |
---|
| 1417 | sprintf(cMsg, "ALFA cal factors for beam %d: %.3e, %.3e", |
---|
| 1418 | iBeam+1, sALFAcal[iBeam][0], sALFAcal[iBeam][1]); |
---|
| 1419 | log(LogOrigin( className, methodName, WHERE ), LogIO::NORMAL, cMsg); |
---|
| 1420 | //logMsg(cMsg); |
---|
| 1421 | } |
---|
[1325] | 1422 | } |
---|
| 1423 | } |
---|
| 1424 | |
---|
[1757] | 1425 | // for GBT SDFITS |
---|
| 1426 | if (cData[STOKES].colnum > 0 ) { |
---|
| 1427 | readData(STOKES, cRow, &iPol ) ; |
---|
| 1428 | for ( int i = 0 ; i < cNPol[iIF] ; i++ ) { |
---|
| 1429 | if ( cPols[i] == iPol ) { |
---|
| 1430 | iPol = i ; |
---|
| 1431 | break ; |
---|
| 1432 | } |
---|
| 1433 | } |
---|
| 1434 | } |
---|
[1325] | 1435 | break; |
---|
| 1436 | } |
---|
| 1437 | } |
---|
| 1438 | } |
---|
| 1439 | |
---|
| 1440 | // EOF? |
---|
| 1441 | if (cRow > cNRow) { |
---|
| 1442 | return -1; |
---|
| 1443 | } |
---|
| 1444 | |
---|
| 1445 | |
---|
| 1446 | if (cALFA) { |
---|
| 1447 | int scanNo; |
---|
| 1448 | readData(SCAN, cRow, &scanNo); |
---|
| 1449 | if (scanNo != cALFAscan) { |
---|
| 1450 | cScanNo++; |
---|
| 1451 | cALFAscan = scanNo; |
---|
| 1452 | } |
---|
| 1453 | mbrec.scanNo = cScanNo; |
---|
| 1454 | |
---|
| 1455 | } else { |
---|
| 1456 | readData(SCAN, cRow, &mbrec.scanNo); |
---|
| 1457 | |
---|
| 1458 | // Ensure that scan number is 1-relative. |
---|
| 1459 | mbrec.scanNo -= (cFirstScanNo - 1); |
---|
| 1460 | } |
---|
| 1461 | |
---|
| 1462 | // Times. |
---|
| 1463 | char datobs[32]; |
---|
[1757] | 1464 | readTime(cRow, cTimeIdx, datobs, mbrec.utc); |
---|
[1325] | 1465 | strcpy(mbrec.datobs, datobs); |
---|
| 1466 | |
---|
| 1467 | if (cData[CYCLE].colnum > 0) { |
---|
| 1468 | readData(CYCLE, cRow, &mbrec.cycleNo); |
---|
[1757] | 1469 | mbrec.cycleNo += cTimeIdx - 1; |
---|
[1325] | 1470 | if (cALFA_BD) mbrec.cycleNo++; |
---|
| 1471 | } else { |
---|
| 1472 | // Cycle number not recorded, must do our own bookkeeping. |
---|
| 1473 | if (mbrec.utc != cLastUTC) { |
---|
| 1474 | mbrec.cycleNo = ++cCycleNo; |
---|
| 1475 | cLastUTC = mbrec.utc; |
---|
| 1476 | } |
---|
| 1477 | } |
---|
| 1478 | |
---|
[1757] | 1479 | if ( iPol != -1 ) { |
---|
| 1480 | if ( mbrec.scanNo != cGLastScan[iPol] ) { |
---|
| 1481 | cGLastScan[iPol] = mbrec.scanNo ; |
---|
| 1482 | cGCycleNo[iPol] = 0 ; |
---|
| 1483 | mbrec.cycleNo = ++cGCycleNo[iPol] ; |
---|
| 1484 | } |
---|
| 1485 | else { |
---|
| 1486 | mbrec.cycleNo = ++cGCycleNo[iPol] ; |
---|
| 1487 | } |
---|
| 1488 | } |
---|
| 1489 | |
---|
[1325] | 1490 | readData(EXPOSURE, cRow, &mbrec.exposure); |
---|
| 1491 | |
---|
| 1492 | // Source identification. |
---|
[1757] | 1493 | readData(OBJECT, cRow, mbrec.srcName); |
---|
[1325] | 1494 | |
---|
[1757] | 1495 | if ( iPol != -1 ) { |
---|
| 1496 | char obsmode[32] ; |
---|
| 1497 | readData( OBSMODE, cRow, obsmode ) ; |
---|
| 1498 | char sig[1] ; |
---|
| 1499 | char cal[1] ; |
---|
| 1500 | readData( SIG, cRow, sig ) ; |
---|
| 1501 | readData( CAL, cRow, cal ) ; |
---|
| 1502 | if ( strstr( obsmode, "PSWITCH" ) != NULL ) { |
---|
| 1503 | // position switch |
---|
| 1504 | strcat( mbrec.srcName, "_p" ) ; |
---|
| 1505 | if ( strstr( obsmode, "PSWITCHON" ) != NULL ) { |
---|
| 1506 | strcat( mbrec.srcName, "s" ) ; |
---|
| 1507 | } |
---|
| 1508 | else if ( strstr( obsmode, "PSWITCHOFF" ) != NULL ) { |
---|
| 1509 | strcat( mbrec.srcName, "r" ) ; |
---|
| 1510 | } |
---|
| 1511 | } |
---|
| 1512 | else if ( strstr( obsmode, "Nod" ) != NULL ) { |
---|
| 1513 | // nod |
---|
| 1514 | strcat( mbrec.srcName, "_n" ) ; |
---|
| 1515 | if ( sig[0] == 'T' ) { |
---|
| 1516 | strcat( mbrec.srcName, "s" ) ; |
---|
| 1517 | } |
---|
| 1518 | else { |
---|
| 1519 | strcat( mbrec.srcName, "r" ) ; |
---|
| 1520 | } |
---|
| 1521 | } |
---|
| 1522 | else if ( strstr( obsmode, "FSWITCH" ) != NULL ) { |
---|
| 1523 | // frequency switch |
---|
| 1524 | strcat( mbrec.srcName, "_f" ) ; |
---|
| 1525 | if ( sig[0] == 'T' ) { |
---|
| 1526 | strcat( mbrec.srcName, "s" ) ; |
---|
| 1527 | } |
---|
| 1528 | else { |
---|
| 1529 | strcat( mbrec.srcName, "r" ) ; |
---|
| 1530 | } |
---|
| 1531 | } |
---|
| 1532 | if ( cal[0] == 'T' ) { |
---|
| 1533 | strcat( mbrec.srcName, "c" ) ; |
---|
| 1534 | } |
---|
| 1535 | else { |
---|
| 1536 | strcat( mbrec.srcName, "o" ) ; |
---|
| 1537 | } |
---|
| 1538 | } |
---|
| 1539 | |
---|
[1325] | 1540 | readData(OBJ_RA, cRow, &mbrec.srcRA); |
---|
| 1541 | if (strcmp(cData[OBJ_RA].name, "OBJ-RA") == 0) { |
---|
| 1542 | mbrec.srcRA *= D2R; |
---|
| 1543 | } |
---|
| 1544 | |
---|
| 1545 | if (strcmp(cData[OBJ_DEC].name, "OBJ-DEC") == 0) { |
---|
| 1546 | readData(OBJ_DEC, cRow, &mbrec.srcDec); |
---|
| 1547 | mbrec.srcDec *= D2R; |
---|
| 1548 | } |
---|
| 1549 | |
---|
| 1550 | // Line rest frequency (Hz). |
---|
| 1551 | readData(RESTFRQ, cRow, &mbrec.restFreq); |
---|
| 1552 | if (mbrec.restFreq == 0.0 && cALFA_BD) { |
---|
| 1553 | mbrec.restFreq = 1420.40575e6; |
---|
| 1554 | } |
---|
| 1555 | |
---|
| 1556 | // Observation mode. |
---|
| 1557 | readData(OBSMODE, cRow, mbrec.obsType); |
---|
| 1558 | |
---|
| 1559 | // Beam-dependent parameters. |
---|
| 1560 | mbrec.beamNo = iBeam + 1; |
---|
| 1561 | |
---|
| 1562 | readData(RA, cRow, &mbrec.ra); |
---|
| 1563 | readData(DEC, cRow, &mbrec.dec); |
---|
| 1564 | mbrec.ra *= D2R; |
---|
| 1565 | mbrec.dec *= D2R; |
---|
| 1566 | |
---|
| 1567 | if (cALFA_BD) mbrec.ra *= 15.0; |
---|
| 1568 | |
---|
| 1569 | float scanrate[2]; |
---|
| 1570 | readData(SCANRATE, cRow, &scanrate); |
---|
| 1571 | if (strcmp(cData[SCANRATE].name, "SCANRATE") == 0) { |
---|
| 1572 | mbrec.raRate = scanrate[0] * D2R; |
---|
| 1573 | mbrec.decRate = scanrate[1] * D2R; |
---|
| 1574 | } |
---|
[1757] | 1575 | mbrec.paRate = 0.0f; |
---|
[1325] | 1576 | |
---|
| 1577 | // IF-dependent parameters. |
---|
| 1578 | int startChan = cStartChan[iIF]; |
---|
| 1579 | int endChan = cEndChan[iIF]; |
---|
| 1580 | int refChan = cRefChan[iIF]; |
---|
| 1581 | |
---|
| 1582 | // Allocate data storage. |
---|
| 1583 | int nChan = abs(endChan - startChan) + 1; |
---|
| 1584 | int nPol = cNPol[iIF]; |
---|
| 1585 | |
---|
[1757] | 1586 | if ( cData[STOKES].colnum > 0 ) |
---|
| 1587 | nPol = 1 ; |
---|
| 1588 | |
---|
[1325] | 1589 | if (cGetSpectra || cGetXPol) { |
---|
| 1590 | int nxpol = cGetXPol ? 2*nChan : 0; |
---|
| 1591 | mbrec.allocate(0, nChan*nPol, nxpol); |
---|
| 1592 | } |
---|
| 1593 | |
---|
| 1594 | mbrec.nIF = 1; |
---|
| 1595 | mbrec.IFno[0] = iIF + 1; |
---|
| 1596 | mbrec.nChan[0] = nChan; |
---|
| 1597 | mbrec.nPol[0] = nPol; |
---|
[1757] | 1598 | mbrec.polNo = iPol ; |
---|
[1325] | 1599 | |
---|
| 1600 | readData(FqRefPix, cRow, mbrec.fqRefPix); |
---|
| 1601 | readData(FqRefVal, cRow, mbrec.fqRefVal); |
---|
| 1602 | readData(FqDelt, cRow, mbrec.fqDelt); |
---|
| 1603 | |
---|
| 1604 | if (cALFA_BD) { |
---|
| 1605 | unsigned char invert; |
---|
| 1606 | int anynul, colnum; |
---|
[2940] | 1607 | findCol((char *)"UPPERSB", &colnum); |
---|
[1325] | 1608 | fits_read_col(cSDptr, TBYTE, colnum, cRow, 1, 1, 0, &invert, &anynul, |
---|
| 1609 | &cStatus); |
---|
| 1610 | |
---|
| 1611 | if (invert) { |
---|
| 1612 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
| 1613 | } |
---|
| 1614 | } |
---|
| 1615 | |
---|
| 1616 | if (cStatus) { |
---|
[1757] | 1617 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1618 | return 1; |
---|
| 1619 | } |
---|
| 1620 | |
---|
| 1621 | // Adjust for channel selection. |
---|
| 1622 | if (mbrec.fqRefPix[0] != refChan) { |
---|
| 1623 | mbrec.fqRefVal[0] += (refChan - mbrec.fqRefPix[0]) * mbrec.fqDelt[0]; |
---|
| 1624 | mbrec.fqRefPix[0] = refChan; |
---|
| 1625 | } |
---|
| 1626 | |
---|
| 1627 | if (endChan < startChan) { |
---|
| 1628 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
| 1629 | } |
---|
| 1630 | |
---|
| 1631 | // The data may only have a scalar Tsys value. |
---|
| 1632 | mbrec.tsys[0][0] = 0.0f; |
---|
| 1633 | mbrec.tsys[0][1] = 0.0f; |
---|
| 1634 | if (cData[TSYS].nelem >= nPol) { |
---|
| 1635 | readData(TSYS, cRow, mbrec.tsys[0]); |
---|
| 1636 | } |
---|
| 1637 | |
---|
| 1638 | for (int j = 0; j < 2; j++) { |
---|
| 1639 | mbrec.calfctr[0][j] = 0.0f; |
---|
| 1640 | } |
---|
| 1641 | if (cData[CALFCTR].colnum > 0) { |
---|
| 1642 | readData(CALFCTR, cRow, mbrec.calfctr); |
---|
| 1643 | } |
---|
| 1644 | |
---|
| 1645 | if (cHaveBase) { |
---|
| 1646 | mbrec.haveBase = 1; |
---|
| 1647 | readData(BASELIN, cRow, mbrec.baseLin); |
---|
| 1648 | readData(BASESUB, cRow, mbrec.baseSub); |
---|
| 1649 | } else { |
---|
| 1650 | mbrec.haveBase = 0; |
---|
| 1651 | } |
---|
| 1652 | |
---|
| 1653 | if (cStatus) { |
---|
[1757] | 1654 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1655 | return 1; |
---|
| 1656 | } |
---|
| 1657 | |
---|
| 1658 | // Read data, sectioning and transposing it in the process. |
---|
[1757] | 1659 | long *blc = new long[cNAxes+1]; |
---|
| 1660 | long *trc = new long[cNAxes+1]; |
---|
| 1661 | long *inc = new long[cNAxes+1]; |
---|
| 1662 | for (int iaxis = 0; iaxis <= cNAxes; iaxis++) { |
---|
[1325] | 1663 | blc[iaxis] = 1; |
---|
| 1664 | trc[iaxis] = 1; |
---|
| 1665 | inc[iaxis] = 1; |
---|
| 1666 | } |
---|
| 1667 | |
---|
[1757] | 1668 | blc[cFreqAxis] = std::min(startChan, endChan); |
---|
| 1669 | trc[cFreqAxis] = std::max(startChan, endChan); |
---|
| 1670 | if (cTimeAxis >= 0) { |
---|
| 1671 | blc[cTimeAxis] = cTimeIdx; |
---|
| 1672 | trc[cTimeAxis] = cTimeIdx; |
---|
| 1673 | } |
---|
| 1674 | blc[cNAxes] = cRow; |
---|
| 1675 | trc[cNAxes] = cRow; |
---|
[1325] | 1676 | |
---|
| 1677 | mbrec.haveSpectra = cGetSpectra; |
---|
| 1678 | if (cGetSpectra) { |
---|
| 1679 | int anynul; |
---|
| 1680 | |
---|
[1757] | 1681 | for (int iPol = 0; iPol < nPol; iPol++) { |
---|
| 1682 | blc[cStokesAxis] = iPol+1; |
---|
| 1683 | trc[cStokesAxis] = iPol+1; |
---|
[1325] | 1684 | |
---|
[1757] | 1685 | if (cALFA && cALFA_CIMA < 2) { |
---|
[1325] | 1686 | // ALFA data: polarizations are stored in successive rows. |
---|
[1757] | 1687 | blc[cStokesAxis] = 1; |
---|
| 1688 | trc[cStokesAxis] = 1; |
---|
[1325] | 1689 | |
---|
[1757] | 1690 | if (iPol) { |
---|
[1325] | 1691 | if (++cRow > cNRow) { |
---|
| 1692 | return -1; |
---|
| 1693 | } |
---|
| 1694 | |
---|
[1757] | 1695 | blc[cNAxes] = cRow; |
---|
| 1696 | trc[cNAxes] = cRow; |
---|
[1325] | 1697 | } |
---|
| 1698 | |
---|
| 1699 | } else if (cData[DATA].nelem < 0) { |
---|
| 1700 | // Variable dimension array; get axis lengths. |
---|
[1757] | 1701 | int naxes = 5, status; |
---|
[1325] | 1702 | |
---|
[1757] | 1703 | if ((status = readDim(DATA, cRow, &naxes, cNAxis))) { |
---|
| 1704 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1705 | |
---|
[1757] | 1706 | } else if ((status = (naxes != cNAxes))) { |
---|
| 1707 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array dimensions changed."); |
---|
[1325] | 1708 | } |
---|
| 1709 | |
---|
| 1710 | if (status) { |
---|
| 1711 | delete [] blc; |
---|
| 1712 | delete [] trc; |
---|
| 1713 | delete [] inc; |
---|
| 1714 | return 1; |
---|
| 1715 | } |
---|
| 1716 | } |
---|
| 1717 | |
---|
[1757] | 1718 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxes, cNAxis, |
---|
| 1719 | blc, trc, inc, 0, mbrec.spectra[0] + iPol*nChan, &anynul, |
---|
[1325] | 1720 | &cStatus)) { |
---|
[1757] | 1721 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1722 | delete [] blc; |
---|
| 1723 | delete [] trc; |
---|
| 1724 | delete [] inc; |
---|
| 1725 | return 1; |
---|
| 1726 | } |
---|
| 1727 | |
---|
| 1728 | if (endChan < startChan) { |
---|
| 1729 | // Reverse the spectrum. |
---|
[1757] | 1730 | float *iptr = mbrec.spectra[0] + iPol*nChan; |
---|
[1325] | 1731 | float *jptr = iptr + nChan - 1; |
---|
| 1732 | float *mid = iptr + nChan/2; |
---|
| 1733 | while (iptr < mid) { |
---|
| 1734 | float tmp = *iptr; |
---|
| 1735 | *(iptr++) = *jptr; |
---|
| 1736 | *(jptr--) = tmp; |
---|
| 1737 | } |
---|
| 1738 | } |
---|
| 1739 | |
---|
| 1740 | if (cALFA) { |
---|
| 1741 | // ALFA data, rescale the spectrum. |
---|
[1757] | 1742 | float el, zd; |
---|
| 1743 | readData(ELEVATIO, cRow, &el); |
---|
| 1744 | zd = 90.0f - el; |
---|
| 1745 | |
---|
| 1746 | float factor = sALFAcal[iBeam][iPol] / alfaGain(zd); |
---|
| 1747 | |
---|
| 1748 | if (cALFA_CIMA > 1) { |
---|
| 1749 | // Rescale according to the number of unblanked accumulations. |
---|
| 1750 | int colnum, naccum; |
---|
[2940] | 1751 | findCol((char *)"STAT", &colnum); |
---|
[1757] | 1752 | fits_read_col(cSDptr, TINT, colnum, cRow, 10*(cTimeIdx-1)+2, 1, 0, |
---|
| 1753 | &naccum, &anynul, &cStatus); |
---|
| 1754 | factor *= cALFAacc / naccum; |
---|
| 1755 | } |
---|
| 1756 | |
---|
| 1757 | float *chan = mbrec.spectra[0] + iPol*nChan; |
---|
[1325] | 1758 | float *chanN = chan + nChan; |
---|
| 1759 | while (chan < chanN) { |
---|
| 1760 | // Approximate conversion to Jy. |
---|
[1757] | 1761 | *(chan++) *= factor; |
---|
[1325] | 1762 | } |
---|
| 1763 | } |
---|
| 1764 | |
---|
[1757] | 1765 | if (mbrec.tsys[0][iPol] == 0.0) { |
---|
[1325] | 1766 | // Compute Tsys as the average across the spectrum. |
---|
[1757] | 1767 | float *chan = mbrec.spectra[0] + iPol*nChan; |
---|
[1325] | 1768 | float *chanN = chan + nChan; |
---|
[1757] | 1769 | float *tsys = mbrec.tsys[0] + iPol; |
---|
[1325] | 1770 | while (chan < chanN) { |
---|
| 1771 | *tsys += *(chan++); |
---|
| 1772 | } |
---|
| 1773 | |
---|
| 1774 | *tsys /= nChan; |
---|
| 1775 | } |
---|
| 1776 | |
---|
| 1777 | // Read data flags. |
---|
| 1778 | if (cData[FLAGGED].colnum > 0) { |
---|
[1757] | 1779 | if (fits_read_subset_byt(cSDptr, cData[FLAGGED].colnum, cNAxes, |
---|
| 1780 | cNAxis, blc, trc, inc, 0, mbrec.flagged[0] + iPol*nChan, &anynul, |
---|
[1325] | 1781 | &cStatus)) { |
---|
[1757] | 1782 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1783 | delete [] blc; |
---|
| 1784 | delete [] trc; |
---|
| 1785 | delete [] inc; |
---|
| 1786 | return 1; |
---|
| 1787 | } |
---|
| 1788 | |
---|
| 1789 | if (endChan < startChan) { |
---|
| 1790 | // Reverse the flag vector. |
---|
[1757] | 1791 | unsigned char *iptr = mbrec.flagged[0] + iPol*nChan; |
---|
[1325] | 1792 | unsigned char *jptr = iptr + nChan - 1; |
---|
| 1793 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
| 1794 | unsigned char tmp = *iptr; |
---|
| 1795 | *(iptr++) = *jptr; |
---|
| 1796 | *(jptr--) = tmp; |
---|
| 1797 | } |
---|
| 1798 | } |
---|
| 1799 | |
---|
| 1800 | } else { |
---|
| 1801 | // All channels are unflagged by default. |
---|
[1757] | 1802 | unsigned char *iptr = mbrec.flagged[0] + iPol*nChan; |
---|
[1325] | 1803 | for (int ichan = 0; ichan < nChan; ichan++) { |
---|
| 1804 | *(iptr++) = 0; |
---|
| 1805 | } |
---|
| 1806 | } |
---|
| 1807 | } |
---|
| 1808 | } |
---|
| 1809 | |
---|
| 1810 | |
---|
| 1811 | // Read cross-polarization data. |
---|
| 1812 | if (cGetXPol) { |
---|
| 1813 | int anynul; |
---|
| 1814 | for (int j = 0; j < 2; j++) { |
---|
| 1815 | mbrec.xcalfctr[0][j] = 0.0f; |
---|
| 1816 | } |
---|
| 1817 | if (cData[XCALFCTR].colnum > 0) { |
---|
| 1818 | readData(XCALFCTR, cRow, mbrec.xcalfctr); |
---|
| 1819 | } |
---|
| 1820 | |
---|
| 1821 | blc[0] = 1; |
---|
| 1822 | trc[0] = 2; |
---|
| 1823 | blc[1] = std::min(startChan, endChan); |
---|
| 1824 | trc[1] = std::max(startChan, endChan); |
---|
| 1825 | blc[2] = cRow; |
---|
| 1826 | trc[2] = cRow; |
---|
| 1827 | |
---|
| 1828 | int nAxis = 2; |
---|
| 1829 | long nAxes[] = {2, nChan}; |
---|
| 1830 | |
---|
| 1831 | if (fits_read_subset_flt(cSDptr, cData[XPOLDATA].colnum, nAxis, nAxes, |
---|
| 1832 | blc, trc, inc, 0, mbrec.xpol[0], &anynul, &cStatus)) { |
---|
[1757] | 1833 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1834 | delete [] blc; |
---|
| 1835 | delete [] trc; |
---|
| 1836 | delete [] inc; |
---|
| 1837 | return 1; |
---|
| 1838 | } |
---|
| 1839 | |
---|
| 1840 | if (endChan < startChan) { |
---|
| 1841 | // Invert the cross-polarization spectrum. |
---|
| 1842 | float *iptr = mbrec.xpol[0]; |
---|
| 1843 | float *jptr = iptr + nChan - 2; |
---|
| 1844 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
| 1845 | float tmp = *iptr; |
---|
| 1846 | *iptr = *jptr; |
---|
| 1847 | *jptr = tmp; |
---|
| 1848 | |
---|
| 1849 | tmp = *(iptr+1); |
---|
| 1850 | *(iptr+1) = *(jptr+1); |
---|
| 1851 | *(jptr+1) = tmp; |
---|
| 1852 | |
---|
| 1853 | iptr += 2; |
---|
| 1854 | jptr -= 2; |
---|
| 1855 | } |
---|
| 1856 | } |
---|
| 1857 | } |
---|
| 1858 | |
---|
| 1859 | delete [] blc; |
---|
| 1860 | delete [] trc; |
---|
| 1861 | delete [] inc; |
---|
| 1862 | |
---|
| 1863 | if (cStatus) { |
---|
[1757] | 1864 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1865 | return 1; |
---|
| 1866 | } |
---|
| 1867 | |
---|
| 1868 | mbrec.extraSysCal = cExtraSysCal; |
---|
| 1869 | readData(REFBEAM, cRow, &mbrec.refBeam); |
---|
| 1870 | readData(TCAL, cRow, &mbrec.tcal[0]); |
---|
| 1871 | readData(TCALTIME, cRow, mbrec.tcalTime); |
---|
[1757] | 1872 | |
---|
[1325] | 1873 | readData(AZIMUTH, cRow, &mbrec.azimuth); |
---|
| 1874 | readData(ELEVATIO, cRow, &mbrec.elevation); |
---|
| 1875 | readData(PARANGLE, cRow, &mbrec.parAngle); |
---|
[1757] | 1876 | |
---|
[1325] | 1877 | readData(FOCUSAXI, cRow, &mbrec.focusAxi); |
---|
| 1878 | readData(FOCUSTAN, cRow, &mbrec.focusTan); |
---|
| 1879 | readData(FOCUSROT, cRow, &mbrec.focusRot); |
---|
[1757] | 1880 | |
---|
[1325] | 1881 | readData(TAMBIENT, cRow, &mbrec.temp); |
---|
| 1882 | readData(PRESSURE, cRow, &mbrec.pressure); |
---|
| 1883 | readData(HUMIDITY, cRow, &mbrec.humidity); |
---|
| 1884 | readData(WINDSPEE, cRow, &mbrec.windSpeed); |
---|
| 1885 | readData(WINDDIRE, cRow, &mbrec.windAz); |
---|
| 1886 | |
---|
| 1887 | if (cALFA_BD) { |
---|
| 1888 | // ALFA BDFITS stores zenith angle rather than elevation. |
---|
| 1889 | mbrec.elevation = 90.0 - mbrec.elevation; |
---|
| 1890 | } |
---|
| 1891 | |
---|
| 1892 | mbrec.azimuth *= D2R; |
---|
| 1893 | mbrec.elevation *= D2R; |
---|
| 1894 | mbrec.parAngle *= D2R; |
---|
| 1895 | mbrec.focusRot *= D2R; |
---|
| 1896 | mbrec.windAz *= D2R; |
---|
| 1897 | |
---|
[1757] | 1898 | // For GBT data, source velocity can be evaluated |
---|
| 1899 | if ( cData[RVSYS].colnum > 0 && cData[VFRAME].colnum > 0 ) { |
---|
| 1900 | float vframe; |
---|
| 1901 | readData(VFRAME, cRow, &vframe); |
---|
| 1902 | float rvsys; |
---|
| 1903 | readData(RVSYS, cRow, &rvsys); |
---|
| 1904 | //mbrec.srcVelocity = rvsys - vframe ; |
---|
| 1905 | mbrec.srcVelocity = rvsys ; |
---|
[1325] | 1906 | } |
---|
| 1907 | |
---|
[1757] | 1908 | if (cStatus) { |
---|
| 1909 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
[1325] | 1910 | return 1; |
---|
| 1911 | } |
---|
| 1912 | |
---|
| 1913 | return 0; |
---|
| 1914 | } |
---|
| 1915 | |
---|
| 1916 | //-------------------------------------------------------- SDFITSreader::close |
---|
| 1917 | |
---|
| 1918 | // Close the SDFITS file. |
---|
| 1919 | |
---|
| 1920 | void SDFITSreader::close() |
---|
| 1921 | { |
---|
| 1922 | if (cSDptr) { |
---|
| 1923 | int status = 0; |
---|
| 1924 | fits_close_file(cSDptr, &status); |
---|
[1757] | 1925 | cSDptr = 0x0; |
---|
[1325] | 1926 | |
---|
| 1927 | if (cBeams) delete [] cBeams; |
---|
| 1928 | if (cIFs) delete [] cIFs; |
---|
| 1929 | if (cStartChan) delete [] cStartChan; |
---|
| 1930 | if (cEndChan) delete [] cEndChan; |
---|
| 1931 | if (cRefChan) delete [] cRefChan; |
---|
| 1932 | } |
---|
| 1933 | } |
---|
| 1934 | |
---|
[1757] | 1935 | //------------------------------------------------------- SDFITSreader::log |
---|
| 1936 | |
---|
| 1937 | // Log a message. If the current CFITSIO status value is non-zero, also log |
---|
| 1938 | // the corresponding error message and the CFITSIO message stack. |
---|
| 1939 | |
---|
[3067] | 1940 | void SDFITSreader::log(LogOrigin origin, LogIO::Command priority, const char *msg) |
---|
[1757] | 1941 | { |
---|
| 1942 | LogIO os( origin ) ; |
---|
| 1943 | |
---|
[3067] | 1944 | os << priority << msg << endl ; |
---|
[1757] | 1945 | |
---|
| 1946 | if (cStatus > 0) { |
---|
| 1947 | fits_get_errstatus(cStatus, cMsg); |
---|
| 1948 | os << cMsg << endl ; |
---|
| 1949 | |
---|
| 1950 | while (fits_read_errmsg(cMsg)) { |
---|
| 1951 | os << cMsg << endl ; |
---|
| 1952 | } |
---|
| 1953 | } |
---|
| 1954 | os << LogIO::POST ; |
---|
| 1955 | } |
---|
| 1956 | |
---|
[1325] | 1957 | //----------------------------------------------------- SDFITSreader::findData |
---|
| 1958 | |
---|
| 1959 | // Locate a data item in the SDFITS file. |
---|
| 1960 | |
---|
| 1961 | void SDFITSreader::findData( |
---|
| 1962 | int iData, |
---|
| 1963 | char *name, |
---|
| 1964 | int type) |
---|
| 1965 | { |
---|
| 1966 | cData[iData].name = name; |
---|
| 1967 | cData[iData].type = type; |
---|
| 1968 | |
---|
| 1969 | int colnum; |
---|
| 1970 | findCol(name, &colnum); |
---|
| 1971 | cData[iData].colnum = colnum; |
---|
| 1972 | |
---|
| 1973 | // Determine the number of data elements. |
---|
| 1974 | if (colnum > 0) { |
---|
| 1975 | int coltype; |
---|
| 1976 | long nelem, width; |
---|
| 1977 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
[1757] | 1978 | fits_get_bcolparms(cSDptr, colnum, 0x0, cData[iData].units, 0x0, 0x0, 0x0, |
---|
| 1979 | 0x0, 0x0, 0x0, &cStatus); |
---|
[1325] | 1980 | |
---|
| 1981 | // Look for a TDIMnnn keyword or column. |
---|
| 1982 | char tdim[8]; |
---|
| 1983 | sprintf(tdim, "TDIM%d", colnum); |
---|
| 1984 | findCol(tdim, &cData[iData].tdimcol); |
---|
| 1985 | |
---|
| 1986 | if (coltype < 0) { |
---|
| 1987 | // CFITSIO returns coltype < 0 for variable length arrays. |
---|
| 1988 | cData[iData].coltype = -coltype; |
---|
| 1989 | cData[iData].nelem = -nelem; |
---|
| 1990 | |
---|
| 1991 | } else { |
---|
| 1992 | cData[iData].coltype = coltype; |
---|
| 1993 | |
---|
| 1994 | // Is there a TDIMnnn column? |
---|
| 1995 | if (cData[iData].tdimcol > 0) { |
---|
| 1996 | // Yes, dimensions of the fixed-length array could still vary. |
---|
| 1997 | cData[iData].nelem = -nelem; |
---|
| 1998 | } else { |
---|
| 1999 | cData[iData].nelem = nelem; |
---|
| 2000 | } |
---|
| 2001 | } |
---|
| 2002 | |
---|
| 2003 | } else if (colnum == 0) { |
---|
| 2004 | // Keyword. |
---|
| 2005 | cData[iData].coltype = 0; |
---|
| 2006 | cData[iData].nelem = 1; |
---|
| 2007 | cData[iData].tdimcol = -1; |
---|
| 2008 | } |
---|
| 2009 | } |
---|
| 2010 | |
---|
[1757] | 2011 | //------------------------------------------------------ SDFITSreader::findCol |
---|
| 2012 | |
---|
| 2013 | // Locate a parameter in the SDFITS file. |
---|
| 2014 | |
---|
| 2015 | void SDFITSreader::findCol( |
---|
| 2016 | char *name, |
---|
| 2017 | int *colnum) |
---|
| 2018 | { |
---|
| 2019 | *colnum = 0; |
---|
| 2020 | int status = 0; |
---|
| 2021 | fits_get_colnum(cSDptr, CASESEN, name, colnum, &status); |
---|
| 2022 | |
---|
| 2023 | if (status) { |
---|
| 2024 | // Not a real column - maybe it's virtual. |
---|
| 2025 | char card[81]; |
---|
| 2026 | |
---|
| 2027 | status = 0; |
---|
| 2028 | fits_read_card(cSDptr, name, card, &status); |
---|
| 2029 | if (status) { |
---|
| 2030 | // Not virtual either. |
---|
| 2031 | *colnum = -1; |
---|
| 2032 | } |
---|
| 2033 | |
---|
| 2034 | // Clear error messages. |
---|
| 2035 | fits_clear_errmsg(); |
---|
| 2036 | } |
---|
| 2037 | } |
---|
| 2038 | |
---|
[1325] | 2039 | //------------------------------------------------------ SDFITSreader::readDim |
---|
| 2040 | |
---|
| 2041 | // Determine the dimensions of an array in the SDFITS file. |
---|
| 2042 | |
---|
| 2043 | int SDFITSreader::readDim( |
---|
| 2044 | int iData, |
---|
| 2045 | long iRow, |
---|
[1757] | 2046 | int *naxes, |
---|
| 2047 | long naxis[]) |
---|
[1325] | 2048 | { |
---|
| 2049 | int colnum = cData[iData].colnum; |
---|
| 2050 | if (colnum <= 0) { |
---|
| 2051 | return 1; |
---|
| 2052 | } |
---|
| 2053 | |
---|
[1757] | 2054 | int maxdim = *naxes; |
---|
[1325] | 2055 | if (cData[iData].tdimcol < 0) { |
---|
| 2056 | // No TDIMnnn column for this array. |
---|
| 2057 | if (cData[iData].nelem < 0) { |
---|
| 2058 | // Variable length array; read the array descriptor. |
---|
[1757] | 2059 | *naxes = 1; |
---|
[1325] | 2060 | long dummy; |
---|
[1757] | 2061 | if (fits_read_descript(cSDptr, colnum, iRow, naxis, &dummy, &cStatus)) { |
---|
[1325] | 2062 | return 1; |
---|
| 2063 | } |
---|
| 2064 | |
---|
| 2065 | } else { |
---|
| 2066 | // Read the repeat count from TFORMnnn. |
---|
[1757] | 2067 | if (fits_read_tdim(cSDptr, colnum, maxdim, naxes, naxis, &cStatus)) { |
---|
[1325] | 2068 | return 1; |
---|
| 2069 | } |
---|
| 2070 | } |
---|
| 2071 | |
---|
| 2072 | } else { |
---|
| 2073 | // Read the TDIMnnn value from the header or table. |
---|
| 2074 | char tdim[8], tdimval[64]; |
---|
| 2075 | sprintf(tdim, "TDIM%d", colnum); |
---|
| 2076 | readData(tdim, TSTRING, iRow, tdimval); |
---|
| 2077 | |
---|
| 2078 | // fits_decode_tdim() checks that the TDIMnnn value is within the length |
---|
| 2079 | // of the array in the specified column number but unfortunately doesn't |
---|
| 2080 | // recognize variable-length arrays. Hence we must decode it here. |
---|
| 2081 | char *tp = tdimval; |
---|
| 2082 | if (*tp != '(') return 1; |
---|
| 2083 | |
---|
| 2084 | tp++; |
---|
[1757] | 2085 | *naxes = 0; |
---|
[1325] | 2086 | for (size_t j = 1; j < strlen(tdimval); j++) { |
---|
| 2087 | if (tdimval[j] == ',' || tdimval[j] == ')') { |
---|
[1757] | 2088 | sscanf(tp, "%ld", naxis + (*naxes)++); |
---|
[1325] | 2089 | if (tdimval[j] == ')') break; |
---|
| 2090 | tp = tdimval + j + 1; |
---|
| 2091 | } |
---|
| 2092 | } |
---|
| 2093 | } |
---|
| 2094 | |
---|
| 2095 | return 0; |
---|
| 2096 | } |
---|
| 2097 | |
---|
| 2098 | //----------------------------------------------------- SDFITSreader::readParm |
---|
| 2099 | |
---|
| 2100 | // Read a parameter value from the SDFITS file. |
---|
| 2101 | |
---|
| 2102 | int SDFITSreader::readParm( |
---|
| 2103 | char *name, |
---|
| 2104 | int type, |
---|
| 2105 | void *value) |
---|
| 2106 | { |
---|
| 2107 | return readData(name, type, 1, value); |
---|
| 2108 | } |
---|
| 2109 | |
---|
| 2110 | //----------------------------------------------------- SDFITSreader::readData |
---|
| 2111 | |
---|
| 2112 | // Read a data value from the SDFITS file. |
---|
| 2113 | |
---|
| 2114 | int SDFITSreader::readData( |
---|
| 2115 | char *name, |
---|
| 2116 | int type, |
---|
| 2117 | long iRow, |
---|
| 2118 | void *value) |
---|
| 2119 | { |
---|
| 2120 | int colnum; |
---|
| 2121 | findCol(name, &colnum); |
---|
| 2122 | |
---|
[1757] | 2123 | if (colnum > 0 && iRow > 0) { |
---|
[1325] | 2124 | // Read the first value from the specified row of the table. |
---|
| 2125 | int coltype; |
---|
| 2126 | long nelem, width; |
---|
| 2127 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
| 2128 | |
---|
| 2129 | int anynul; |
---|
| 2130 | if (type == TSTRING) { |
---|
| 2131 | if (nelem) { |
---|
| 2132 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
| 2133 | &cStatus); |
---|
| 2134 | } else { |
---|
| 2135 | strcpy((char *)value, ""); |
---|
| 2136 | } |
---|
| 2137 | |
---|
| 2138 | } else { |
---|
| 2139 | if (nelem) { |
---|
| 2140 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, value, &anynul, |
---|
| 2141 | &cStatus); |
---|
| 2142 | } else { |
---|
| 2143 | if (type == TSHORT) { |
---|
| 2144 | *((short *)value) = 0; |
---|
| 2145 | } else if (type == TINT) { |
---|
| 2146 | *((int *)value) = 0; |
---|
| 2147 | } else if (type == TFLOAT) { |
---|
| 2148 | *((float *)value) = 0.0f; |
---|
| 2149 | } else if (type == TDOUBLE) { |
---|
| 2150 | *((double *)value) = 0.0; |
---|
| 2151 | } |
---|
| 2152 | } |
---|
| 2153 | } |
---|
| 2154 | |
---|
| 2155 | } else if (colnum == 0) { |
---|
| 2156 | // Read keyword value. |
---|
| 2157 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
| 2158 | |
---|
| 2159 | } else { |
---|
| 2160 | // Not present. |
---|
| 2161 | if (type == TSTRING) { |
---|
| 2162 | strcpy((char *)value, ""); |
---|
| 2163 | } else if (type == TSHORT) { |
---|
| 2164 | *((short *)value) = 0; |
---|
| 2165 | } else if (type == TINT) { |
---|
| 2166 | *((int *)value) = 0; |
---|
| 2167 | } else if (type == TFLOAT) { |
---|
| 2168 | *((float *)value) = 0.0f; |
---|
| 2169 | } else if (type == TDOUBLE) { |
---|
| 2170 | *((double *)value) = 0.0; |
---|
| 2171 | } |
---|
| 2172 | } |
---|
| 2173 | |
---|
| 2174 | return colnum < 0; |
---|
| 2175 | } |
---|
| 2176 | |
---|
| 2177 | //----------------------------------------------------- SDFITSreader::readData |
---|
| 2178 | |
---|
| 2179 | // Read data from the SDFITS file. |
---|
| 2180 | |
---|
| 2181 | int SDFITSreader::readData( |
---|
| 2182 | int iData, |
---|
| 2183 | long iRow, |
---|
| 2184 | void *value) |
---|
| 2185 | { |
---|
| 2186 | int type = cData[iData].type; |
---|
| 2187 | int colnum = cData[iData].colnum; |
---|
| 2188 | |
---|
[1757] | 2189 | if (colnum > 0 && iRow > 0) { |
---|
[1325] | 2190 | // Read the required number of values from the specified row of the table. |
---|
[1757] | 2191 | long nelem = cData[iData].nelem; |
---|
[1325] | 2192 | int anynul; |
---|
| 2193 | if (type == TSTRING) { |
---|
| 2194 | if (nelem) { |
---|
| 2195 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
| 2196 | &cStatus); |
---|
| 2197 | } else { |
---|
| 2198 | strcpy((char *)value, ""); |
---|
| 2199 | } |
---|
| 2200 | |
---|
| 2201 | } else { |
---|
| 2202 | if (nelem) { |
---|
| 2203 | fits_read_col(cSDptr, type, colnum, iRow, 1, abs(nelem), 0, value, |
---|
| 2204 | &anynul, &cStatus); |
---|
| 2205 | } else { |
---|
| 2206 | if (type == TSHORT) { |
---|
| 2207 | *((short *)value) = 0; |
---|
| 2208 | } else if (type == TINT) { |
---|
| 2209 | *((int *)value) = 0; |
---|
| 2210 | } else if (type == TFLOAT) { |
---|
| 2211 | *((float *)value) = 0.0f; |
---|
| 2212 | } else if (type == TDOUBLE) { |
---|
| 2213 | *((double *)value) = 0.0; |
---|
| 2214 | } |
---|
| 2215 | } |
---|
| 2216 | } |
---|
| 2217 | |
---|
| 2218 | } else if (colnum == 0) { |
---|
| 2219 | // Read keyword value. |
---|
[1757] | 2220 | char *name = cData[iData].name; |
---|
[1325] | 2221 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
| 2222 | |
---|
| 2223 | } else { |
---|
| 2224 | // Not present. |
---|
| 2225 | if (type == TSTRING) { |
---|
| 2226 | strcpy((char *)value, ""); |
---|
| 2227 | } else if (type == TSHORT) { |
---|
| 2228 | *((short *)value) = 0; |
---|
| 2229 | } else if (type == TINT) { |
---|
| 2230 | *((int *)value) = 0; |
---|
| 2231 | } else if (type == TFLOAT) { |
---|
| 2232 | *((float *)value) = 0.0f; |
---|
| 2233 | } else if (type == TDOUBLE) { |
---|
| 2234 | *((double *)value) = 0.0; |
---|
| 2235 | } |
---|
| 2236 | } |
---|
| 2237 | |
---|
| 2238 | return colnum < 0; |
---|
| 2239 | } |
---|
| 2240 | |
---|
[1757] | 2241 | //------------------------------------------------------ SDFITSreader::readCol |
---|
[1325] | 2242 | |
---|
[1757] | 2243 | // Read a scalar column from the SDFITS file. |
---|
[1325] | 2244 | |
---|
[1757] | 2245 | int SDFITSreader::readCol( |
---|
| 2246 | int iData, |
---|
| 2247 | void *value) |
---|
[1325] | 2248 | { |
---|
[1757] | 2249 | int type = cData[iData].type; |
---|
[1325] | 2250 | |
---|
[1757] | 2251 | if (cData[iData].colnum > 0) { |
---|
| 2252 | // Table column. |
---|
| 2253 | int anynul; |
---|
| 2254 | fits_read_col(cSDptr, type, cData[iData].colnum, 1, 1, cNRow, 0, |
---|
| 2255 | value, &anynul, &cStatus); |
---|
[1325] | 2256 | |
---|
[1757] | 2257 | } else { |
---|
| 2258 | // Header keyword. |
---|
| 2259 | readData(iData, 0, value); |
---|
| 2260 | for (int irow = 1; irow < cNRow; irow++) { |
---|
| 2261 | if (type == TSHORT) { |
---|
| 2262 | ((short *)value)[irow] = *((short *)value); |
---|
| 2263 | } else if (type == TINT) { |
---|
| 2264 | ((int *)value)[irow] = *((int *)value); |
---|
| 2265 | } else if (type == TFLOAT) { |
---|
| 2266 | ((float *)value)[irow] = *((float *)value); |
---|
| 2267 | } else if (type == TDOUBLE) { |
---|
| 2268 | ((double *)value)[irow] = *((double *)value); |
---|
| 2269 | } |
---|
[1325] | 2270 | } |
---|
[1757] | 2271 | } |
---|
[1325] | 2272 | |
---|
[1757] | 2273 | return cData[iData].colnum < 0; |
---|
| 2274 | } |
---|
| 2275 | |
---|
| 2276 | //----------------------------------------------------- SDFITSreader::readTime |
---|
| 2277 | |
---|
| 2278 | // Read the time from the SDFITS file. |
---|
| 2279 | |
---|
| 2280 | int SDFITSreader::readTime( |
---|
| 2281 | long iRow, |
---|
| 2282 | int iPix, |
---|
| 2283 | char *datobs, |
---|
| 2284 | double &utc) |
---|
| 2285 | { |
---|
| 2286 | readData(DATE_OBS, iRow, datobs); |
---|
| 2287 | if (cData[TIME].colnum >= 0) { |
---|
| 2288 | readData(TIME, iRow, &utc); |
---|
| 2289 | } else if (cGBT) { |
---|
| 2290 | Int yy, mm ; |
---|
| 2291 | Double dd, hour, min, sec ; |
---|
| 2292 | sscanf( datobs, "%d-%d-%lfT%lf:%lf:%lf", &yy, &mm, &dd, &hour, &min, &sec ) ; |
---|
| 2293 | dd = dd + ( hour * 3600.0 + min * 60.0 + sec ) / 86400.0 ; |
---|
| 2294 | MVTime mvt( yy, mm, dd ) ; |
---|
| 2295 | dd = mvt.day() ; |
---|
| 2296 | utc = fmod( dd, 1.0 ) * 86400.0 ; |
---|
| 2297 | } else if (cNAxisTime > 1) { |
---|
| 2298 | double timeDelt, timeRefPix, timeRefVal; |
---|
| 2299 | readData(TimeRefVal, iRow, &timeRefVal); |
---|
| 2300 | readData(TimeDelt, iRow, &timeDelt); |
---|
| 2301 | readData(TimeRefPix, iRow, &timeRefPix); |
---|
| 2302 | utc = timeRefVal + (iPix - timeRefPix) * timeDelt; |
---|
[1325] | 2303 | } |
---|
[1757] | 2304 | |
---|
| 2305 | if (cALFA_BD) utc *= 3600.0; |
---|
| 2306 | |
---|
| 2307 | // Check DATE-OBS format. |
---|
| 2308 | if (datobs[2] == '/') { |
---|
| 2309 | // Translate an old-format DATE-OBS. |
---|
| 2310 | datobs[9] = datobs[1]; |
---|
| 2311 | datobs[8] = datobs[0]; |
---|
| 2312 | datobs[2] = datobs[6]; |
---|
| 2313 | datobs[5] = datobs[3]; |
---|
| 2314 | datobs[3] = datobs[7]; |
---|
| 2315 | datobs[6] = datobs[4]; |
---|
| 2316 | datobs[7] = '-'; |
---|
| 2317 | datobs[4] = '-'; |
---|
| 2318 | datobs[1] = '9'; |
---|
| 2319 | datobs[0] = '1'; |
---|
| 2320 | |
---|
| 2321 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
| 2322 | // Dig UTC out of a new-format DATE-OBS. |
---|
| 2323 | int hh, mm; |
---|
| 2324 | float ss; |
---|
| 2325 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
| 2326 | utc = (hh*60 + mm)*60 + ss; |
---|
| 2327 | } |
---|
| 2328 | |
---|
| 2329 | datobs[10] = '\0'; |
---|
| 2330 | |
---|
| 2331 | return 0; |
---|
[1325] | 2332 | } |
---|
[1757] | 2333 | |
---|
| 2334 | //------------------------------------------------------ SDFITSreader::alfaCal |
---|
| 2335 | |
---|
| 2336 | // Process ALFA calibration data. |
---|
| 2337 | |
---|
| 2338 | int SDFITSreader::alfaCal( |
---|
| 2339 | short iBeam, |
---|
| 2340 | short iIF, |
---|
| 2341 | short iPol) |
---|
| 2342 | { |
---|
| 2343 | const string methodName = "alfaCal()" ; |
---|
| 2344 | |
---|
| 2345 | int calOn; |
---|
| 2346 | char chars[32]; |
---|
| 2347 | if (cALFA_BD) { |
---|
[2940] | 2348 | readData((char *)"OBS_NAME", TSTRING, cRow, chars); |
---|
[1757] | 2349 | } else { |
---|
[2940] | 2350 | readData((char *)"SCANTYPE", TSTRING, cRow, chars); |
---|
[1757] | 2351 | } |
---|
| 2352 | |
---|
| 2353 | if (strcmp(chars, "ON") == 0) { |
---|
| 2354 | calOn = 1; |
---|
| 2355 | } else if (strcmp(chars, "OFF") == 0) { |
---|
| 2356 | calOn = 0; |
---|
| 2357 | } else { |
---|
| 2358 | return 1; |
---|
| 2359 | } |
---|
| 2360 | |
---|
| 2361 | // Read cal data. |
---|
| 2362 | long *blc = new long[cNAxes+1]; |
---|
| 2363 | long *trc = new long[cNAxes+1]; |
---|
| 2364 | long *inc = new long[cNAxes+1]; |
---|
| 2365 | for (int iaxis = 0; iaxis <= cNAxes; iaxis++) { |
---|
| 2366 | blc[iaxis] = 1; |
---|
| 2367 | trc[iaxis] = 1; |
---|
| 2368 | inc[iaxis] = 1; |
---|
| 2369 | } |
---|
| 2370 | |
---|
| 2371 | // User channel selection. |
---|
| 2372 | int startChan = cStartChan[iIF]; |
---|
| 2373 | int endChan = cEndChan[iIF]; |
---|
| 2374 | |
---|
| 2375 | blc[cFreqAxis] = std::min(startChan, endChan); |
---|
| 2376 | trc[cFreqAxis] = std::max(startChan, endChan); |
---|
| 2377 | if (cALFA_CIMA > 1) { |
---|
| 2378 | // CIMAFITS 2.x has a legitimate STOKES axis... |
---|
| 2379 | blc[cStokesAxis] = iPol+1; |
---|
| 2380 | trc[cStokesAxis] = iPol+1; |
---|
| 2381 | } else { |
---|
| 2382 | // ...older ALFA data does not. |
---|
| 2383 | blc[cStokesAxis] = 1; |
---|
| 2384 | trc[cStokesAxis] = 1; |
---|
| 2385 | } |
---|
| 2386 | if (cTimeAxis >= 0) { |
---|
| 2387 | blc[cTimeAxis] = cTimeIdx; |
---|
| 2388 | trc[cTimeAxis] = cTimeIdx; |
---|
| 2389 | } |
---|
| 2390 | blc[cNAxes] = cRow; |
---|
| 2391 | trc[cNAxes] = cRow; |
---|
| 2392 | |
---|
| 2393 | float spectrum[endChan]; |
---|
| 2394 | int anynul; |
---|
| 2395 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxes, cNAxis, |
---|
| 2396 | blc, trc, inc, 0, spectrum, &anynul, &cStatus)) { |
---|
| 2397 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
| 2398 | delete [] blc; |
---|
| 2399 | delete [] trc; |
---|
| 2400 | delete [] inc; |
---|
| 2401 | return 1; |
---|
| 2402 | } |
---|
| 2403 | |
---|
| 2404 | // Factor to rescale according to the number of unblanked accumulations. |
---|
| 2405 | float factor = 1.0f; |
---|
| 2406 | if (cALFA_CIMA > 1) { |
---|
| 2407 | int colnum, naccum; |
---|
[2940] | 2408 | findCol((char *)"STAT", &colnum); |
---|
[1757] | 2409 | fits_read_col(cSDptr, TINT, colnum, cRow, 2, 1, 0, &naccum, &anynul, |
---|
| 2410 | &cStatus); |
---|
| 2411 | factor = cALFAacc / naccum; |
---|
| 2412 | } |
---|
| 2413 | |
---|
| 2414 | // Average the spectrum. |
---|
| 2415 | float mean = 1e9f; |
---|
| 2416 | for (int k = 0; k < 2; k++) { |
---|
| 2417 | float discrim = 2.0f * mean; |
---|
| 2418 | |
---|
| 2419 | int nChan = 0; |
---|
| 2420 | float sum = 0.0f; |
---|
| 2421 | |
---|
| 2422 | float *chanN = spectrum + abs(endChan - startChan) + 1; |
---|
| 2423 | for (float *chan = spectrum; chan < chanN; chan++) { |
---|
| 2424 | // Simple discriminant that eliminates strong radar interference. |
---|
| 2425 | if (*chan < discrim) { |
---|
| 2426 | nChan++; |
---|
| 2427 | sum += *chan * factor; |
---|
| 2428 | } |
---|
| 2429 | } |
---|
| 2430 | |
---|
| 2431 | mean = sum / nChan; |
---|
| 2432 | } |
---|
| 2433 | |
---|
| 2434 | if (calOn) { |
---|
| 2435 | sALFAcalOn[iBeam][iPol] *= sALFAcalNon[iBeam][iPol]; |
---|
| 2436 | sALFAcalOn[iBeam][iPol] += mean; |
---|
| 2437 | sALFAcalOn[iBeam][iPol] /= ++sALFAcalNon[iBeam][iPol]; |
---|
| 2438 | } else { |
---|
| 2439 | sALFAcalOff[iBeam][iPol] *= sALFAcalNoff[iBeam][iPol]; |
---|
| 2440 | sALFAcalOff[iBeam][iPol] += mean; |
---|
| 2441 | sALFAcalOff[iBeam][iPol] /= ++sALFAcalNoff[iBeam][iPol]; |
---|
| 2442 | } |
---|
| 2443 | |
---|
| 2444 | if (sALFAcalNon[iBeam][iPol] && sALFAcalNoff[iBeam][iPol]) { |
---|
| 2445 | // Tcal should come from the TCAL table, it varies weakly with beam, |
---|
| 2446 | // polarization, and frequency. However, TCAL is not written properly. |
---|
| 2447 | float Tcal = 12.0f; |
---|
| 2448 | sALFAcal[iBeam][iPol] = Tcal / (sALFAcalOn[iBeam][iPol] - |
---|
| 2449 | sALFAcalOff[iBeam][iPol]); |
---|
| 2450 | |
---|
| 2451 | // Scale from K to Jy; the gain also varies weakly with beam, |
---|
| 2452 | // polarization, frequency, and zenith angle. |
---|
| 2453 | float fluxCal = 10.0f; |
---|
| 2454 | sALFAcal[iBeam][iPol] /= fluxCal; |
---|
| 2455 | } |
---|
| 2456 | |
---|
| 2457 | return 0; |
---|
| 2458 | } |
---|
| 2459 | |
---|
| 2460 | //----------------------------------------------------- SDFITSreader::alfaGain |
---|
| 2461 | |
---|
| 2462 | // ALFA gain factor. |
---|
| 2463 | |
---|
| 2464 | float SDFITSreader::alfaGain( |
---|
| 2465 | float zd) |
---|
| 2466 | { |
---|
| 2467 | // Gain vs zenith distance table from Robert Minchin, 2008/12/08. |
---|
| 2468 | const int nZD = 37; |
---|
| 2469 | const float zdLim[] = {1.5f, 19.5f}; |
---|
| 2470 | const float zdInc = (nZD - 1) / (zdLim[1] - zdLim[0]); |
---|
| 2471 | float zdGain[] = { 1.00723708, |
---|
| 2472 | 1.16644573, 1.15003645, 1.07117307, 1.02532673, |
---|
| 2473 | 1.01788402, 1.01369524, 1.00000000, 0.989855111, |
---|
| 2474 | 0.990888834, 0.993996620, 0.989964068, 0.982213855, |
---|
| 2475 | 0.978662670, 0.979349494, 0.978478372, 0.974631131, |
---|
| 2476 | 0.972126007, 0.972835243, 0.972742677, 0.968671739, |
---|
| 2477 | 0.963891327, 0.963452935, 0.966831207, 0.969585896, |
---|
| 2478 | 0.970700860, 0.972644389, 0.973754644, 0.967344403, |
---|
| 2479 | 0.952168941, 0.937160134, 0.927843094, 0.914048433, |
---|
| 2480 | 0.886700928, 0.864701211, 0.869126320, 0.854309499}; |
---|
| 2481 | |
---|
| 2482 | float gain; |
---|
| 2483 | // Do table lookup by linear interpolation. |
---|
| 2484 | float lambda = zdInc * (zd - zdLim[0]); |
---|
| 2485 | int j = int(lambda); |
---|
| 2486 | if (j < 0) { |
---|
| 2487 | gain = zdGain[0]; |
---|
| 2488 | } else if (j >= nZD-1) { |
---|
| 2489 | gain = zdGain[nZD-1]; |
---|
| 2490 | } else { |
---|
| 2491 | gain = zdGain[j] + (lambda - j) * (zdGain[j+1] - zdGain[j]); |
---|
| 2492 | } |
---|
| 2493 | |
---|
| 2494 | return gain; |
---|
| 2495 | } |
---|
| 2496 | |
---|