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