| 1 | //#---------------------------------------------------------------------------
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| 2 | //# SDWriter.cc: ASAP class to write out single dish spectra.
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| 3 | //#---------------------------------------------------------------------------
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| 4 | //# Copyright (C) 2004
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| 5 | //# ATNF
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| 6 | //#
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| 7 | //# This program is free software; you can redistribute it and/or modify it
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| 8 | //# under the terms of the GNU General Public License as published by the Free
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| 9 | //# Software Foundation; either version 2 of the License, or (at your option)
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| 10 | //# any later version.
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| 11 | //#
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| 12 | //# This program is distributed in the hope that it will be useful, but
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| 13 | //# WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | //# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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| 15 | //# Public License for more details.
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| 16 | //#
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| 17 | //# You should have received a copy of the GNU General Public License along
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| 18 | //# with this program; if not, write to the Free Software Foundation, Inc.,
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| 19 | //# 675 Massachusetts Ave, Cambridge, MA 02139, USA.
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| 20 | //#
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| 21 | //# Correspondence concerning this software should be addressed as follows:
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| 22 | //# Internet email: Malte.Marquarding@csiro.au
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| 23 | //# Postal address: Malte Marquarding,
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| 24 | //# Australia Telescope National Facility,
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| 25 | //# P.O. Box 76,
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| 26 | //# Epping, NSW, 2121,
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| 27 | //# AUSTRALIA
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| 28 | //#
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| 29 | //# $Id: SDWriter.cc 717 2005-11-17 03:37:54Z mar637 $
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| 30 | //#---------------------------------------------------------------------------
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| 31 |
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| 32 | #include <string>
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| 33 |
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| 34 | #include <casa/aips.h>
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| 35 | #include <casa/Arrays/Array.h>
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| 36 | #include <casa/Arrays/Vector.h>
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| 37 | #include <casa/BasicSL/Complex.h>
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| 38 | #include <casa/Utilities/CountedPtr.h>
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| 39 | #include <casa/Utilities/Assert.h>
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| 40 |
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| 41 | #include <atnf/PKSIO/PKSMS2writer.h>
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| 42 | #include <atnf/PKSIO/PKSSDwriter.h>
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| 43 |
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| 44 | #include <tables/Tables/ArrayColumn.h>
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| 45 |
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| 46 |
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| 47 |
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| 48 |
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| 49 | #include "SDContainer.h"
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| 50 | #include "SDMemTable.h"
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| 51 | #include "SDWriter.h"
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| 52 | #include "SDFITSImageWriter.h"
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| 53 | #include "SDAsciiWriter.h"
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| 54 | #include "SDPol.h"
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| 55 |
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| 56 | using namespace casa;
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| 57 | using namespace asap;
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| 58 |
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| 59 | //--------------------------------------------------------- SDWriter::SDWriter
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| 60 |
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| 61 | // Default constructor.
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| 62 |
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| 63 | SDWriter::SDWriter(const std::string &format)
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| 64 | {
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| 65 | cFormat = format;
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| 66 | //
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| 67 | String t(cFormat);
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| 68 | t.upcase();
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| 69 | if (t== "MS2") {
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| 70 | cWriter = new PKSMS2writer();
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| 71 | } else if (t== "SDFITS") {
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| 72 | cWriter = new PKSSDwriter();
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| 73 | } else if (t== "FITS") {
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| 74 | cWriter = 0;
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| 75 | } else if (t== "ASCII") {
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| 76 | cWriter = 0;
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| 77 | } else {
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| 78 | throw (AipsError("Unrecognized Format"));
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| 79 | }
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| 80 | }
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| 81 |
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| 82 | //-------------------------------------------------------- SDWriter::~SDWriter
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| 83 |
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| 84 | // Destructor.
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| 85 |
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| 86 | SDWriter::~SDWriter()
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| 87 | {
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| 88 | if (cWriter) {
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| 89 | delete cWriter;
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| 90 | }
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| 91 | }
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| 92 |
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| 93 | //-------------------------------------------------------- SDWriter::setFormat
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| 94 |
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| 95 | // Reset the output format.
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| 96 |
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| 97 | Int SDWriter::setFormat(const std::string &format)
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| 98 | {
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| 99 | if (format != cFormat) {
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| 100 | if (cWriter) delete cWriter;
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| 101 | }
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| 102 | //
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| 103 | cFormat = format;
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| 104 | String t(cFormat);
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| 105 | t.upcase();
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| 106 | if (t== "MS2") {
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| 107 | cWriter = new PKSMS2writer();
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| 108 | } else if (t== "SDFITS") {
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| 109 | cWriter = new PKSSDwriter();
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| 110 | } else if (t== "FITS") {
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| 111 | cWriter = 0;
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| 112 | } else if (t== "ASCII") {
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| 113 | cWriter = 0;
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| 114 | } else {
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| 115 | throw (AipsError("Unrecognized Format"));
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| 116 | }
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| 117 | return 0;
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| 118 | }
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| 119 |
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| 120 | //------------------------------------------------------------ SDWriter::write
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| 121 |
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| 122 | // Write an SDMemTable to file in the desired format, closing the file when
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| 123 | // finished.
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| 124 |
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| 125 | Int SDWriter::write(const CountedPtr<SDMemTable> in,
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| 126 | const std::string &filename, Bool toStokes)
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| 127 | {
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| 128 |
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| 129 | // Image FITS
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| 130 |
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| 131 | if (cFormat=="FITS") {
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| 132 | Bool verbose = True;
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| 133 | SDFITSImageWriter iw;
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| 134 | if (iw.write(*in, filename, verbose, toStokes)) {
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| 135 | return 0;
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| 136 | } else {
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| 137 | return 1;
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| 138 | }
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| 139 | } else if (cFormat=="ASCII") {
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| 140 | SDAsciiWriter iw;
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| 141 | if (iw.write(*in, filename, toStokes)) {
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| 142 | return 0;
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| 143 | } else {
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| 144 | return 1;
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| 145 | }
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| 146 | }
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| 147 |
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| 148 | // MS or SDFITS
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| 149 |
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| 150 | // Extract the header from the table.
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| 151 | SDHeader hdr = in->getSDHeader();
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| 152 | const Int nPol = hdr.npol;
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| 153 | const Int nChan = hdr.nchan;
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| 154 |
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| 155 | // Get Freq table
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| 156 |
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| 157 | SDFrequencyTable sdft = in->getSDFreqTable();
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| 158 | Vector<Double> restFreqs;
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| 159 | String restFreqUnit;
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| 160 | sdft.restFrequencies(restFreqs, restFreqUnit);
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| 161 | Double restFreq = 0.0;
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| 162 | if (restFreqs.nelements()>0) {
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| 163 | Quantum<Double> rF(restFreqs(0), Unit(restFreqUnit));
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| 164 | restFreq = rF.getValue(Unit("Hz"));
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| 165 | }
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| 166 |
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| 167 | // Table columns
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| 168 |
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| 169 | const Table table = in->table();
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| 170 | ROArrayColumn<uInt> freqIDCol(table, "FREQID");
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| 171 | Vector<uInt> freqIDs;
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| 172 |
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| 173 | // Create the output file and write static data.
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| 174 | Int status;
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| 175 | if (status = cWriter->create(filename, hdr.observer, hdr.project,
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| 176 | hdr.antennaname, hdr.antennaposition,
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| 177 | hdr.obstype, hdr.equinox, hdr.freqref,
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| 178 | nChan, nPol, False, False)) {
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| 179 | throw(AipsError("Failed to create output file"));
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| 180 | }
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| 181 |
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| 182 | Int scanNo = -1;
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| 183 | Int cycleNo;
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| 184 | Double mjd0 = 0.0;
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| 185 | //
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| 186 | Array<Float> spectra, tSys, stokes;
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| 187 | Array<uChar> flags;
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| 188 | Bool doLinear = True;
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| 189 | //
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| 190 | Int count = 0;
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| 191 | for (Int iRow = 0; iRow < in->nRow(); iRow++) {
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| 192 | // Extract the next integration from the table.
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| 193 | SDContainer sd = in->getSDContainer(iRow);
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| 194 | if (sd.scanid != scanNo) {
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| 195 | scanNo = sd.scanid;
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| 196 | mjd0 = sd.timestamp;
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| 197 | cycleNo = 1;
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| 198 | } else if (fabs(sd.timestamp-mjd0) > sd.interval) {
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| 199 | cycleNo++;
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| 200 | }
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| 201 |
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| 202 | // Get FreqID vector
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| 203 | freqIDCol.get(iRow, freqIDs);
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| 204 |
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| 205 | // Get Stokes array (all beams/IFs/Stokes). Its not in SDContainer
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| 206 | if (toStokes) {
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| 207 | stokes = in->getStokesSpectrum(iRow,-1,-1);
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| 208 | }
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| 209 |
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| 210 | IPosition start(asap::nAxes,0);
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| 211 | IPosition end(stokes.shape()-1);
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| 212 |
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| 213 | // Write it out beam by beam.
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| 214 | for (Int iBeam = 0; iBeam < hdr.nbeam; iBeam++) {
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| 215 | start(asap::BeamAxis) = iBeam;
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| 216 | end(asap::BeamAxis) = iBeam;
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| 217 |
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| 218 | // Write it out IF by IF.
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| 219 | for (Int iIF = 0; iIF < hdr.nif; iIF++) {
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| 220 | start(asap::IFAxis) = iIF;
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| 221 | end(asap::IFAxis) = iIF;
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| 222 | uInt freqID = freqIDs(iIF);
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| 223 |
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| 224 | // None of these are stored in SDMemTable by SDReader.
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| 225 | //String fieldName = "";
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| 226 | //Vector<Double> srcDir(2, 0.0);
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| 227 | Vector<Double> srcPM(2, 0.0);
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| 228 | Double srcVel = 0.0;
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| 229 |
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| 230 | // The writer will assume refPix = nChan/2 (0-rel). So recompute
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| 231 | // the frequency at this location.
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| 232 |
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| 233 | Double cdelt = sdft.increment(freqID);
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| 234 | Double crval = sdft.referenceValue(freqID);
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| 235 | Double crpix = sdft.referencePixel(freqID);
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| 236 | Double pixel = nChan/2;
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| 237 | Double refFreqNew = (pixel-crpix)*cdelt + crval;
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| 238 | //
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| 239 | //Vector<Float> tcal(2, 0.0f);
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| 240 | //String tcalTime = "";
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| 241 | //Float azimuth = 0.0f;
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| 242 | //Float elevation = 0.0f;
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| 243 | //Float parAngle = 0.0f;
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| 244 | Float focusAxi = 0.0f;
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| 245 | Float focusTan = 0.0f;
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| 246 | Float focusRot = 0.0f;
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| 247 | Float temperature = 0.0f;
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| 248 | Float pressure = 0.0f;
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| 249 | Float humidity = 0.0f;
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| 250 | Float windSpeed = 0.0f;
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| 251 | Float windAz = 0.0f;
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| 252 | //Int refBeam = 0;
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| 253 | //Vector<Double> direction(2, 0.0);
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| 254 | Vector<Double> scanRate(2, 0.0);
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| 255 | Vector<Float> sigma(nPol, 0.0f);
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| 256 | Vector<Float> calFctr(nPol, 0.0f);
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| 257 | Matrix<Float> baseLin(nPol,2, 0.0f);
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| 258 | Matrix<Float> baseSub(nPol,9, 0.0f);
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| 259 | Complex xCalFctr;
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| 260 | Vector<Complex> xPol;
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| 261 |
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| 262 | // Get data.
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| 263 |
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| 264 | if (toStokes) {
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| 265 |
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| 266 | // Big pain in the ass because
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| 267 | // 1) Stokes vector may have less polarizations than input
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| 268 | // 2) Stokes column virtual and not in SDContainer
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| 269 | // 3) Tsys and FLags already selected for IF and Beam
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| 270 | // 3) Have to flip order
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| 271 |
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| 272 | Array<Float> t = sd.getTsys(iBeam,iIF);
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| 273 | tSys = SDPolUtil::computeStokesTSysForWriter (t, doLinear);
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| 274 | Array<uChar> t2 = sd.getFlags(iBeam,iIF);
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| 275 | flags = SDPolUtil::computeStokesFlagsForWriter (t2, doLinear);
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| 276 | spectra = SDPolUtil::extractStokesForWriter (stokes,start,end);
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| 277 | } else {
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| 278 | tSys = sd.getTsys(iBeam,iIF);
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| 279 | flags = sd.getFlags(iBeam,iIF);
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| 280 | spectra = sd.getSpectrum(iBeam,iIF);
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| 281 | }
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| 282 | //
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| 283 | if (status = cWriter->write(sd.scanid+1, cycleNo, sd.timestamp,
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| 284 | sd.interval, sd.fieldname, sd.sourcename,
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| 285 | sd.getDirection(iBeam),
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| 286 | srcPM, srcVel, iIF+1, refFreqNew,
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| 287 | nChan*abs(cdelt), cdelt, restFreq, sd.tcal,
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| 288 | sd.tcaltime, sd.azimuth, sd.elevation,
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| 289 | sd.parangle,
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| 290 | focusAxi, focusTan, focusRot, temperature,
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| 291 | pressure, humidity, windSpeed, windAz,
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| 292 | sd.refbeam, iBeam+1,
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| 293 | sd.getDirection(iBeam),
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| 294 | scanRate,
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| 295 | tSys, sigma, calFctr,
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| 296 | baseLin, baseSub,
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| 297 | spectra, flags,
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| 298 | xCalFctr, xPol)) {
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| 299 | cerr << "Error writing output file." << endl;
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| 300 | return 1;
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| 301 | }
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| 302 |
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| 303 | count++;
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| 304 | }
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| 305 | }
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| 306 | }
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| 307 | ostringstream oss;
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| 308 | oss << "SDWriter: wrote " << count << " rows to " << filename << endl;
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| 309 | pushLog(String(oss));
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| 310 | cWriter->close();
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| 311 |
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| 312 | return 0;
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| 313 | }
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| 314 |
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| 315 |
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