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