[1720] | 1 | //#--------------------------------------------------------------------------- |
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[1325] | 2 | //# PKSFITSreader.cc: Class to read Parkes multibeam data from a FITS file. |
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| 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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[1325] | 13 | //# |
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[1720] | 14 | //# livedata is distributed in the hope that it will be useful, but WITHOUT |
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| 15 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 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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| 29 | //# |
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| 30 | //# http://www.atnf.csiro.au/computing/software/livedata.html |
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| 31 | //# $Id: PKSFITSreader.cc,v 19.23 2009-09-29 07:33:38 cal103 Exp $ |
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[1325] | 32 | //#--------------------------------------------------------------------------- |
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| 33 | //# Original: 2000/08/02, Mark Calabretta, ATNF |
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| 34 | //#--------------------------------------------------------------------------- |
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| 35 | |
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[1452] | 36 | #include <atnf/PKSIO/PKSmsg.h> |
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[1325] | 37 | #include <atnf/PKSIO/MBFITSreader.h> |
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| 38 | #include <atnf/PKSIO/SDFITSreader.h> |
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| 39 | #include <atnf/PKSIO/PKSFITSreader.h> |
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[1452] | 40 | #include <atnf/PKSIO/PKSrecord.h> |
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[1325] | 41 | |
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[1452] | 42 | #include <casa/stdio.h> |
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[1325] | 43 | #include <casa/Arrays/Array.h> |
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| 44 | #include <casa/BasicMath/Math.h> |
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| 45 | #include <casa/Quanta/MVTime.h> |
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| 46 | |
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| 47 | //----------------------------------------------- PKSFITSreader::PKSFITSreader |
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| 48 | |
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| 49 | // Constructor sets the method of position interpolation. |
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| 50 | |
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| 51 | PKSFITSreader::PKSFITSreader( |
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| 52 | const String fitsType, |
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| 53 | const Int retry, |
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| 54 | const Bool interpolate) |
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| 55 | { |
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[1452] | 56 | cMBrec.setNIFs(1); |
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[1325] | 57 | |
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| 58 | if (fitsType == "SDFITS") { |
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| 59 | cReader = new SDFITSreader(); |
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| 60 | } else { |
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| 61 | cReader = new MBFITSreader(retry, interpolate ? 1 : 0); |
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| 62 | } |
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[1452] | 63 | |
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| 64 | // By default, messages are written to stderr. |
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| 65 | initMsg(); |
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[1325] | 66 | } |
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| 67 | |
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| 68 | //---------------------------------------------- PKSFITSreader::~PKSFITSreader |
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| 69 | |
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| 70 | // Destructor. |
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| 71 | |
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| 72 | PKSFITSreader::~PKSFITSreader() |
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| 73 | { |
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| 74 | close(); |
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| 75 | delete cReader; |
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| 76 | } |
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| 77 | |
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[1452] | 78 | //------------------------------------------------------ PKSFITSreader::setMsg |
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| 79 | |
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| 80 | // Set message disposition. If fd is non-zero messages will be written |
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| 81 | // to that file descriptor, else stored for retrieval by getMsg(). |
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| 82 | |
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| 83 | Int PKSFITSreader::setMsg(FILE *fd) |
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| 84 | { |
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| 85 | PKSmsg::setMsg(fd); |
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| 86 | cReader->setMsg(fd); |
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| 87 | |
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| 88 | return 0; |
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| 89 | } |
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| 90 | |
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[1325] | 91 | //-------------------------------------------------------- PKSFITSreader::open |
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| 92 | |
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| 93 | // Open the FITS file for reading. |
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| 94 | |
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| 95 | Int PKSFITSreader::open( |
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| 96 | const String fitsName, |
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| 97 | Vector<Bool> &beams, |
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| 98 | Vector<Bool> &IFs, |
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| 99 | Vector<uInt> &nChan, |
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| 100 | Vector<uInt> &nPol, |
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| 101 | Vector<Bool> &haveXPol, |
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| 102 | Bool &haveBase, |
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| 103 | Bool &haveSpectra) |
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| 104 | { |
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[1452] | 105 | clearMsg(); |
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| 106 | |
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[1325] | 107 | int extraSysCal, haveBase_, *haveXPol_, haveSpectra_, nBeam, *nChan_, |
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| 108 | nIF, *nPol_, status; |
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[1452] | 109 | status = cReader->open((char *)fitsName.chars(), nBeam, cBeams, nIF, cIFs, |
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| 110 | nChan_, nPol_, haveXPol_, haveBase_, haveSpectra_, |
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| 111 | extraSysCal); |
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| 112 | logMsg(cReader->getMsg()); |
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| 113 | cReader->clearMsg(); |
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| 114 | if (status) { |
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[1325] | 115 | return status; |
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| 116 | } |
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| 117 | |
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| 118 | // Beams present in data. |
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| 119 | beams.resize(nBeam); |
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| 120 | for (Int ibeam = 0; ibeam < nBeam; ibeam++) { |
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| 121 | beams(ibeam) = cBeams[ibeam]; |
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| 122 | } |
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| 123 | |
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| 124 | // IFs, channels, and polarizations present in data. |
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| 125 | IFs.resize(nIF); |
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| 126 | nChan.resize(nIF); |
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| 127 | nPol.resize(nIF); |
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| 128 | haveXPol.resize(nIF); |
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| 129 | |
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| 130 | for (Int iIF = 0; iIF < nIF; iIF++) { |
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| 131 | IFs(iIF) = cIFs[iIF]; |
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| 132 | nChan(iIF) = nChan_[iIF]; |
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| 133 | nPol(iIF) = nPol_[iIF]; |
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| 134 | |
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| 135 | // Cross-polarization data present? |
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| 136 | haveXPol(iIF) = haveXPol_[iIF]; |
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| 137 | } |
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| 138 | |
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| 139 | cNBeam = nBeam; |
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| 140 | cNIF = nIF; |
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| 141 | cNChan.assign(nChan); |
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| 142 | cNPol.assign(nPol); |
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| 143 | cHaveXPol.assign(haveXPol); |
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| 144 | |
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| 145 | // Baseline parameters present? |
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| 146 | haveBase = haveBase_; |
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| 147 | |
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| 148 | // Spectral data present? |
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| 149 | haveSpectra = haveSpectra_; |
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| 150 | |
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| 151 | return 0; |
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| 152 | } |
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| 153 | |
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| 154 | //--------------------------------------------------- PKSFITSreader::getHeader |
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| 155 | |
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| 156 | // Get parameters describing the data. |
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| 157 | |
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| 158 | Int PKSFITSreader::getHeader( |
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| 159 | String &observer, |
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| 160 | String &project, |
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| 161 | String &antName, |
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| 162 | Vector<Double> &antPosition, |
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| 163 | String &obsType, |
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[1399] | 164 | String &bunit, |
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[1325] | 165 | Float &equinox, |
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| 166 | String &dopplerFrame, |
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| 167 | Double &mjd, |
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| 168 | Double &refFreq, |
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| 169 | Double &bandwidth) |
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| 170 | { |
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[1399] | 171 | char bunit_[32], datobs[32], dopplerFrame_[32], observer_[32], |
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| 172 | obsType_[32], project_[32], radecsys[32], telescope[32]; |
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[1452] | 173 | int status; |
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[1325] | 174 | float equinox_; |
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| 175 | double antPos[3], utc; |
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| 176 | |
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[1452] | 177 | status = cReader->getHeader(observer_, project_, telescope, antPos, |
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| 178 | obsType_, bunit_, equinox_, radecsys, |
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| 179 | dopplerFrame_, datobs, utc, refFreq, bandwidth); |
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| 180 | logMsg(cReader->getMsg()); |
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| 181 | cReader->clearMsg(); |
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| 182 | if (status) { |
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[1325] | 183 | return 1; |
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| 184 | } |
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| 185 | |
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| 186 | observer = trim(observer_); |
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| 187 | project = trim(project_); |
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| 188 | antName = trim(telescope); |
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| 189 | antPosition.resize(3); |
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| 190 | antPosition(0) = antPos[0]; |
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| 191 | antPosition(1) = antPos[1]; |
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| 192 | antPosition(2) = antPos[2]; |
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| 193 | obsType = trim(obsType_); |
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[1399] | 194 | bunit = trim(bunit_); |
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[1325] | 195 | equinox = equinox_; |
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| 196 | dopplerFrame = trim(dopplerFrame_); |
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| 197 | |
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| 198 | // Get UTC in MJD form. |
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| 199 | Int day, month, year; |
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| 200 | sscanf(datobs, "%4d-%2d-%2d", &year, &month, &day); |
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| 201 | MVTime date(year, month, Double(day)); |
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| 202 | mjd = date.day() + utc/86400.0; |
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| 203 | |
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| 204 | return 0; |
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| 205 | } |
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| 206 | |
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| 207 | //------------------------------------------------- PKSFITSreader::getFreqInfo |
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| 208 | |
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| 209 | // Get frequency parameters for each IF. |
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| 210 | |
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| 211 | Int PKSFITSreader::getFreqInfo( |
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| 212 | Vector<Double> &startFreq, |
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| 213 | Vector<Double> &endFreq) |
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| 214 | { |
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| 215 | int nIF; |
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| 216 | double *startfreq, *endfreq; |
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| 217 | |
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[1452] | 218 | Int status = cReader->getFreqInfo(nIF, startfreq, endfreq); |
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| 219 | |
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| 220 | logMsg(cReader->getMsg()); |
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| 221 | cReader->clearMsg(); |
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| 222 | if (!status) { |
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[1325] | 223 | startFreq.takeStorage(IPosition(1,nIF), startfreq, TAKE_OVER); |
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| 224 | endFreq.takeStorage(IPosition(1,nIF), endfreq, TAKE_OVER); |
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| 225 | } |
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| 226 | |
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| 227 | return status; |
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| 228 | } |
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| 229 | |
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| 230 | //------------------------------------------------------ PKSFITSreader::select |
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| 231 | |
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| 232 | // Set data selection by beam number and channel. |
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| 233 | |
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| 234 | uInt PKSFITSreader::select( |
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| 235 | const Vector<Bool> beamSel, |
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| 236 | const Vector<Bool> IFsel, |
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| 237 | const Vector<Int> startChan, |
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| 238 | const Vector<Int> endChan, |
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| 239 | const Vector<Int> refChan, |
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| 240 | const Bool getSpectra, |
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| 241 | const Bool getXPol, |
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[1452] | 242 | const Int coordSys) |
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[1325] | 243 | { |
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| 244 | // Apply beam selection. |
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| 245 | uInt nBeamSel = beamSel.nelements(); |
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| 246 | for (uInt ibeam = 0; ibeam < cNBeam; ibeam++) { |
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| 247 | // This modifies FITSreader::cBeams[]. |
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| 248 | if (ibeam < nBeamSel) { |
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| 249 | cBeams[ibeam] = cBeams[ibeam] && beamSel(ibeam); |
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| 250 | } else { |
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| 251 | cBeams[ibeam] = 0; |
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| 252 | } |
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| 253 | } |
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| 254 | |
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| 255 | // Apply IF selection. |
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| 256 | int *end = new int[cNIF]; |
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| 257 | int *ref = new int[cNIF]; |
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| 258 | int *start = new int[cNIF]; |
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| 259 | |
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| 260 | for (uInt iIF = 0; iIF < cNIF; iIF++) { |
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| 261 | // This modifies FITSreader::cIFs[]. |
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| 262 | if (iIF < IFsel.nelements()) { |
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| 263 | cIFs[iIF] = cIFs[iIF] && IFsel(iIF); |
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| 264 | } else { |
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| 265 | cIFs[iIF] = 0; |
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| 266 | } |
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| 267 | |
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| 268 | if (cIFs[iIF]) { |
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| 269 | if (iIF < startChan.nelements()) { |
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| 270 | start[iIF] = startChan(iIF); |
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| 271 | |
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| 272 | if (start[iIF] <= 0) { |
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| 273 | start[iIF] += cNChan(iIF); |
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| 274 | } else if (start[iIF] > Int(cNChan(iIF))) { |
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| 275 | start[iIF] = cNChan(iIF); |
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| 276 | } |
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| 277 | |
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| 278 | } else { |
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| 279 | start[iIF] = 1; |
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| 280 | } |
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| 281 | |
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| 282 | if (iIF < endChan.nelements()) { |
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| 283 | end[iIF] = endChan(iIF); |
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| 284 | |
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| 285 | if (end[iIF] <= 0) { |
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| 286 | end[iIF] += cNChan(iIF); |
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| 287 | } else if (end[iIF] > Int(cNChan(iIF))) { |
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| 288 | end[iIF] = cNChan(iIF); |
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| 289 | } |
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| 290 | |
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| 291 | } else { |
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| 292 | end[iIF] = cNChan(iIF); |
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| 293 | } |
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| 294 | |
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| 295 | if (iIF < refChan.nelements()) { |
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| 296 | ref[iIF] = refChan(iIF); |
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| 297 | } else { |
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| 298 | if (start[iIF] <= end[iIF]) { |
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| 299 | ref[iIF] = start[iIF] + (end[iIF] - start[iIF] + 1)/2; |
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| 300 | } else { |
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| 301 | ref[iIF] = start[iIF] - (start[iIF] - end[iIF] + 1)/2; |
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| 302 | } |
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| 303 | } |
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| 304 | } |
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| 305 | } |
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| 306 | |
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| 307 | cGetSpectra = getSpectra; |
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| 308 | cGetXPol = getXPol; |
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[1452] | 309 | cCoordSys = coordSys; |
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[1325] | 310 | |
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| 311 | uInt maxNChan = cReader->select(start, end, ref, cGetSpectra, cGetXPol, |
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[1452] | 312 | cCoordSys); |
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| 313 | logMsg(cReader->getMsg()); |
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| 314 | cReader->clearMsg(); |
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[1325] | 315 | |
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| 316 | delete [] end; |
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| 317 | delete [] ref; |
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| 318 | delete [] start; |
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| 319 | |
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| 320 | return maxNChan; |
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| 321 | } |
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| 322 | |
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| 323 | //--------------------------------------------------- PKSFITSreader::findRange |
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| 324 | |
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| 325 | // Read the TIME column. |
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| 326 | |
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| 327 | Int PKSFITSreader::findRange( |
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| 328 | Int &nRow, |
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| 329 | Int &nSel, |
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| 330 | Vector<Double> &timeSpan, |
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| 331 | Matrix<Double> &positions) |
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| 332 | { |
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| 333 | char dateSpan[2][32]; |
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| 334 | double utcSpan[2]; |
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| 335 | double* posns; |
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| 336 | |
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[1452] | 337 | Int status = cReader->findRange(nRow, nSel, dateSpan, utcSpan, posns); |
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| 338 | logMsg(cReader->getMsg()); |
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| 339 | cReader->clearMsg(); |
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| 340 | |
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| 341 | if (!status) { |
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[1325] | 342 | timeSpan.resize(2); |
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| 343 | |
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| 344 | Int day, month, year; |
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| 345 | sscanf(dateSpan[0], "%4d-%2d-%2d", &year, &month, &day); |
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| 346 | timeSpan(0) = MVTime(year, month, Double(day)).second() + utcSpan[0]; |
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| 347 | sscanf(dateSpan[1], "%4d-%2d-%2d", &year, &month, &day); |
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| 348 | timeSpan(1) = MVTime(year, month, Double(day)).second() + utcSpan[1]; |
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| 349 | |
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| 350 | positions.takeStorage(IPosition(2,2,nSel), posns, TAKE_OVER); |
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| 351 | } |
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| 352 | |
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| 353 | return status; |
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| 354 | } |
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| 355 | |
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| 356 | //-------------------------------------------------------- PKSFITSreader::read |
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| 357 | |
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| 358 | // Read the next data record. |
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| 359 | |
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[1452] | 360 | Int PKSFITSreader::read(PKSrecord &pksrec) |
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[1325] | 361 | { |
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[1452] | 362 | Int status = cReader->read(cMBrec); |
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| 363 | logMsg(cReader->getMsg()); |
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| 364 | cReader->clearMsg(); |
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[1325] | 365 | |
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[1452] | 366 | if (status) { |
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[1325] | 367 | if (status != -1) { |
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| 368 | status = 1; |
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| 369 | } |
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| 370 | |
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| 371 | return status; |
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| 372 | } |
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| 373 | |
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| 374 | |
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[1452] | 375 | uInt nChan = cMBrec.nChan[0]; |
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| 376 | uInt nPol = cMBrec.nPol[0]; |
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[1325] | 377 | |
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[1452] | 378 | pksrec.scanNo = cMBrec.scanNo; |
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| 379 | pksrec.cycleNo = cMBrec.cycleNo; |
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[1325] | 380 | |
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| 381 | // Extract MJD. |
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| 382 | Int day, month, year; |
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[1452] | 383 | sscanf(cMBrec.datobs, "%4d-%2d-%2d", &year, &month, &day); |
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| 384 | pksrec.mjd = MVTime(year, month, Double(day)).day() + cMBrec.utc/86400.0; |
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[1325] | 385 | |
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[1452] | 386 | pksrec.interval = cMBrec.exposure; |
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[1325] | 387 | |
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[1452] | 388 | pksrec.fieldName = trim(cMBrec.srcName); |
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| 389 | pksrec.srcName = pksrec.fieldName; |
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[1325] | 390 | |
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[1452] | 391 | pksrec.srcDir.resize(2); |
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| 392 | pksrec.srcDir(0) = cMBrec.srcRA; |
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| 393 | pksrec.srcDir(1) = cMBrec.srcDec; |
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[1325] | 394 | |
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[1452] | 395 | pksrec.srcPM.resize(2); |
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| 396 | pksrec.srcPM(0) = 0.0; |
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| 397 | pksrec.srcPM(1) = 0.0; |
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| 398 | pksrec.srcVel = 0.0; |
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| 399 | pksrec.obsType = trim(cMBrec.obsType); |
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[1427] | 400 | |
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[1452] | 401 | pksrec.IFno = cMBrec.IFno[0]; |
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| 402 | Double chanWidth = fabs(cMBrec.fqDelt[0]); |
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| 403 | pksrec.refFreq = cMBrec.fqRefVal[0]; |
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| 404 | pksrec.bandwidth = chanWidth * nChan; |
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| 405 | pksrec.freqInc = cMBrec.fqDelt[0]; |
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| 406 | pksrec.restFreq = cMBrec.restFreq; |
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[1427] | 407 | |
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[1452] | 408 | pksrec.tcal.resize(nPol); |
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[1325] | 409 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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[1452] | 410 | pksrec.tcal(ipol) = cMBrec.tcal[0][ipol]; |
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[1325] | 411 | } |
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[1452] | 412 | pksrec.tcalTime = trim(cMBrec.tcalTime); |
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| 413 | pksrec.azimuth = cMBrec.azimuth; |
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| 414 | pksrec.elevation = cMBrec.elevation; |
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| 415 | pksrec.parAngle = cMBrec.parAngle; |
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[1325] | 416 | |
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[1452] | 417 | pksrec.focusAxi = cMBrec.focusAxi; |
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| 418 | pksrec.focusTan = cMBrec.focusTan; |
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| 419 | pksrec.focusRot = cMBrec.focusRot; |
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[1325] | 420 | |
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[1452] | 421 | pksrec.temperature = cMBrec.temp; |
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| 422 | pksrec.pressure = cMBrec.pressure; |
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| 423 | pksrec.humidity = cMBrec.humidity; |
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| 424 | pksrec.windSpeed = cMBrec.windSpeed; |
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| 425 | pksrec.windAz = cMBrec.windAz; |
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[1325] | 426 | |
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[1452] | 427 | pksrec.refBeam = cMBrec.refBeam; |
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| 428 | pksrec.beamNo = cMBrec.beamNo; |
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[1325] | 429 | |
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[1452] | 430 | pksrec.direction.resize(2); |
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| 431 | pksrec.direction(0) = cMBrec.ra; |
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| 432 | pksrec.direction(1) = cMBrec.dec; |
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| 433 | pksrec.pCode = cMBrec.pCode; |
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| 434 | pksrec.rateAge = cMBrec.rateAge; |
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| 435 | pksrec.scanRate.resize(2); |
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| 436 | pksrec.scanRate(0) = cMBrec.raRate; |
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| 437 | pksrec.scanRate(1) = cMBrec.decRate; |
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| 438 | pksrec.paRate = cMBrec.paRate; |
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[1427] | 439 | |
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[1452] | 440 | pksrec.tsys.resize(nPol); |
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| 441 | pksrec.sigma.resize(nPol); |
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| 442 | pksrec.calFctr.resize(nPol); |
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[1325] | 443 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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[1452] | 444 | pksrec.tsys(ipol) = cMBrec.tsys[0][ipol]; |
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| 445 | pksrec.sigma(ipol) = (pksrec.tsys(ipol) / 0.81) / |
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| 446 | sqrt(pksrec.interval * chanWidth); |
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| 447 | pksrec.calFctr(ipol) = cMBrec.calfctr[0][ipol]; |
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[1325] | 448 | } |
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| 449 | |
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[1452] | 450 | if (cMBrec.haveBase) { |
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| 451 | pksrec.baseLin.resize(2,nPol); |
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[1635] | 452 | pksrec.baseSub.resize(24,nPol); |
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[1325] | 453 | |
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| 454 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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[1452] | 455 | pksrec.baseLin(0,ipol) = cMBrec.baseLin[0][ipol][0]; |
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| 456 | pksrec.baseLin(1,ipol) = cMBrec.baseLin[0][ipol][1]; |
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[1325] | 457 | |
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[1635] | 458 | for (uInt j = 0; j < 24; j++) { |
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[1452] | 459 | pksrec.baseSub(j,ipol) = cMBrec.baseSub[0][ipol][j]; |
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[1325] | 460 | } |
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| 461 | } |
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| 462 | |
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| 463 | } else { |
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[1452] | 464 | pksrec.baseLin.resize(0,0); |
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| 465 | pksrec.baseSub.resize(0,0); |
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[1325] | 466 | } |
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| 467 | |
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[1452] | 468 | if (cGetSpectra && cMBrec.haveSpectra) { |
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| 469 | pksrec.spectra.resize(nChan,nPol); |
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| 470 | pksrec.spectra.takeStorage(IPosition(2,nChan,nPol), cMBrec.spectra[0], |
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[1427] | 471 | SHARE); |
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[1325] | 472 | |
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[1452] | 473 | pksrec.flagged.resize(nChan,nPol); |
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| 474 | pksrec.flagged.takeStorage(IPosition(2,nChan,nPol), cMBrec.flagged[0], |
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[1427] | 475 | SHARE); |
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[1325] | 476 | |
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| 477 | } else { |
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[1452] | 478 | pksrec.spectra.resize(0,0); |
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| 479 | pksrec.flagged.resize(0,0); |
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[1325] | 480 | } |
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| 481 | |
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| 482 | if (cGetXPol) { |
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[1452] | 483 | pksrec.xCalFctr = Complex(cMBrec.xcalfctr[0][0], |
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| 484 | cMBrec.xcalfctr[0][1]); |
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| 485 | pksrec.xPol.resize(nChan); |
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| 486 | pksrec.xPol.takeStorage(IPosition(1,nChan), (Complex *)cMBrec.xpol[0], |
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[1427] | 487 | SHARE); |
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[1325] | 488 | } |
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| 489 | |
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| 490 | return 0; |
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| 491 | } |
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| 492 | |
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| 493 | //------------------------------------------------------- PKSFITSreader::close |
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| 494 | |
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| 495 | // Close the FITS file. |
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| 496 | |
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| 497 | void PKSFITSreader::close() |
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| 498 | { |
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| 499 | cReader->close(); |
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[1452] | 500 | logMsg(cReader->getMsg()); |
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| 501 | cReader->clearMsg(); |
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[1325] | 502 | } |
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| 503 | |
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| 504 | //-------------------------------------------------------- PKSFITSreader::trim |
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| 505 | |
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| 506 | // Trim trailing blanks from a null-terminated character string. |
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| 507 | |
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| 508 | char* PKSFITSreader::trim(char *string) |
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| 509 | { |
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| 510 | int j = 0, k = 0; |
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| 511 | while (string[j] != '\0') { |
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| 512 | if (string[j++] != ' ') { |
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| 513 | k = j; |
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| 514 | } |
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| 515 | } |
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| 516 | |
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| 517 | string[k] = '\0'; |
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| 518 | |
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| 519 | return string; |
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| 520 | } |
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