| 1 | //#---------------------------------------------------------------------------
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| 2 | //# SDReader.cc: A class to read single dish spectra from SDFITS, RPFITS
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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:
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| 30 | //#---------------------------------------------------------------------------
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| 31 | #include <casa/Exceptions.h>
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| 32 | #include <casa/OS/Path.h>
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| 33 | #include <casa/OS/File.h>
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| 34 | #include <casa/Quanta/Unit.h>
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| 35 | #include <atnf/PKSIO/PKSreader.h>
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| 36 |
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| 37 | #include "SDReader.h"
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| 38 | #include "SDDefs.h"
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| 39 |
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| 40 | using namespace casa;
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| 41 | using namespace asap;
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| 42 |
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| 43 | SDReader::SDReader() :
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| 44 | reader_(0),
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| 45 | table_(new SDMemTable()) {
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| 46 | cursor_ = 0;
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| 47 | }
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| 48 | SDReader::SDReader(const std::string& filename, const std::string& unit,
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| 49 | int whichIF, int whichBeam) :
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| 50 | reader_(0),
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| 51 | table_(new SDMemTable()) {
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| 52 | cursor_ = 0;
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| 53 | open(filename, unit, whichIF, whichBeam);
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| 54 | }
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| 55 |
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| 56 | SDReader::SDReader(CountedPtr<SDMemTable> tbl) :
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| 57 | reader_(0),
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| 58 | table_(tbl) {
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| 59 | cursor_ = 0;
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| 60 | }
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| 61 |
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| 62 | SDReader::~SDReader() {
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| 63 | if (reader_) delete reader_; reader_ = 0;
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| 64 | }
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| 65 |
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| 66 | void SDReader::reset() {
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| 67 | cursor_ = 0;
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| 68 | table_ = new SDMemTable();
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| 69 | if (reader_) delete reader_; reader_ = 0;
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| 70 | // re-create the reader
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| 71 | Bool haveBase, haveSpectra, haveXPol;
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| 72 | String format;
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| 73 | Vector<Bool> beams;
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| 74 | if ((reader_ = getPKSreader(filename_, 0, False, format, beams, nIF_,
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| 75 | nChan_, nPol_, haveBase, haveSpectra,
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| 76 | haveXPol)) == 0) {
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| 77 | throw(AipsError("PKSreader failed"));
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| 78 | }
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| 79 | // re-enter the header
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| 80 | table_->putSDHeader(header_);
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| 81 | }
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| 82 |
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| 83 |
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| 84 | void SDReader::close() {
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| 85 | cerr << "disabled" << endl;
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| 86 | }
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| 87 |
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| 88 |
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| 89 |
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| 90 | void SDReader::open(const std::string& filename, const std::string& unit,
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| 91 | int whichIF, int whichBeam) {
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| 92 | if (reader_) delete reader_; reader_ = 0;
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| 93 | Bool haveBase, haveSpectra, haveXPol;
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| 94 | //
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| 95 | String inName(filename);
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| 96 | Path path(inName);
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| 97 | inName = path.expandedName();
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| 98 | //
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| 99 | File file(inName);
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| 100 | if (!file.exists()) {
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| 101 | throw(AipsError("File does not exist"));
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| 102 | }
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| 103 | filename_ = inName;
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| 104 |
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| 105 | // Create reader and fill in values for arguments
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| 106 |
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| 107 | String format;
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| 108 | Vector<Bool> beams;
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| 109 | if ((reader_ = getPKSreader(inName, 0, False, format, beams, nIF_,
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| 110 | nChan_, nPol_, haveBase, haveSpectra,
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| 111 | haveXPol)) == 0) {
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| 112 | throw(AipsError("PKSreader failed"));
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| 113 | }
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| 114 | if (!haveSpectra) {
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| 115 | delete reader_;
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| 116 | reader_ = 0;
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| 117 | throw(AipsError("No spectral data in file."));
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| 118 | return;
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| 119 | }
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| 120 | nBeam_ = beams.nelements();
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| 121 | // Get basic parameters.
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| 122 | if (haveXPol) {
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| 123 | cout << "Warning. Ignoring cross polarisation." << endl;
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| 124 | nPol_--;
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| 125 | }
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| 126 | header_ = SDHeader();
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| 127 | header_.nchan = nChan_;
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| 128 | header_.npol = nPol_;
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| 129 | header_.nbeam = nBeam_;
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| 130 | Int status = reader_->getHeader(header_.observer, header_.project,
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| 131 | header_.antennaname, header_.antennaposition,
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| 132 | header_.obstype,header_.equinox,
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| 133 | header_.freqref,
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| 134 | header_.utc, header_.reffreq,
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| 135 | header_.bandwidth);
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| 136 | if (status) {
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| 137 | delete reader_;
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| 138 | reader_ = 0;
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| 139 | throw(AipsError("Failed to get header."));
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| 140 | return;
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| 141 | }
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| 142 | if ((header_.obstype).matches("*SW*")) {
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| 143 | // need robust way here - probably read ahead of next timestamp
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| 144 | cout << "Header indicates frequency switched observation.\n"
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| 145 | "setting # of IFs = 1 " << endl;
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| 146 | nIF_ = 1;
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| 147 | }
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| 148 | //
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| 149 | // Determine Telescope and set units...
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| 150 |
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| 151 | String sUnit(unit);
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| 152 | if (sUnit.empty()) {
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| 153 | Bool throwIt = False;
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| 154 | Instrument inst = SDMemTable::convertInstrument (header_.antennaname, throwIt);
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| 155 | header_.fluxunit = "Jy";
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| 156 | if (inst==ATMOPRA || inst==TIDBINBILLA) {
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| 157 | header_.fluxunit = "K";
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| 158 | }
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| 159 | cerr << "Assuming brightness unit is " << header_.fluxunit << endl;
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| 160 | } else {
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| 161 | Unit u(sUnit);
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| 162 | if (u==Unit("Jy") || u==Unit("K")) {
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| 163 | header_.fluxunit = unit;
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| 164 | cerr << "Setting brightness unit to " << header_.fluxunit << endl;
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| 165 | } else {
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| 166 | throw(AipsError("Specified brightness unit is illegal - must be consistent with Jy or K"));
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| 167 | }
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| 168 | }
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| 169 | //
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| 170 | header_.nif = nIF_;
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| 171 | header_.epoch = "UTC";
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| 172 |
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| 173 | // Apply selection criteria.
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| 174 |
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| 175 | Vector<Int> ref;
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| 176 | Vector<Bool> beamSel(nBeam_,True);
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| 177 | Vector<Bool> IFsel(nIF_,True);
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| 178 | //
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| 179 | ifOffset_ = 0;
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| 180 | if (whichIF>=0) {
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| 181 | if (whichIF>=0 && whichIF<nIF_) {
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| 182 | IFsel = False;
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| 183 | IFsel(whichIF) = True;
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| 184 | header_.nif = 1;
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| 185 | nIF_ = 1;
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| 186 | ifOffset_ = whichIF;
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| 187 | } else {
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| 188 | throw(AipsError("Illegal IF selection"));
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| 189 | }
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| 190 | }
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| 191 | //
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| 192 | beamOffset_ = 0;
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| 193 | if (whichBeam>=0) {
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| 194 | if (whichBeam>=0 && whichBeam<nBeam_) {
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| 195 | beamSel = False;
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| 196 | beamSel(whichBeam) = True;
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| 197 | header_.nbeam = 1;
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| 198 | nBeam_ = 1;
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| 199 | beamOffset_ = whichBeam;
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| 200 | } else {
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| 201 | throw(AipsError("Illegal Beam selection"));
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| 202 | }
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| 203 | }
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| 204 | //
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| 205 | Vector<Int> start(nIF_, 1);
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| 206 | Vector<Int> end(nIF_, 0);
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| 207 | reader_->select(beamSel, IFsel, start, end, ref, True, haveXPol);
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| 208 | table_->putSDHeader(header_);
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| 209 | frequencies_.setRefFrame(header_.freqref);
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| 210 | frequencies_.setRestFrequencyUnit("Hz");
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| 211 | frequencies_.setEquinox(header_.equinox);
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| 212 | }
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| 213 |
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| 214 | int SDReader::read(const std::vector<int>& seq) {
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| 215 | int status = 0;
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| 216 |
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| 217 | Int beamNo, IFno, refBeam, scanNo, cycleNo;
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| 218 | Float azimuth, elevation, focusAxi, focusRot, focusTan,
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| 219 | humidity, parAngle, pressure, temperature, windAz, windSpeed;
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| 220 | Double bandwidth, freqInc, interval, mjd, refFreq, restFreq, srcVel;
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| 221 | String fieldName, srcName, tcalTime;
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| 222 | Vector<Float> calFctr, sigma, tcal, tsys;
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| 223 | Matrix<Float> baseLin, baseSub;
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| 224 | Vector<Double> direction(2), scanRate(2), srcDir(2), srcPM(2);
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| 225 | Matrix<Float> spectra;
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| 226 | Matrix<uChar> flagtra;
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| 227 | Complex xCalFctr;
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| 228 | Vector<Complex> xPol;
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| 229 | uInt n = seq.size();
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| 230 |
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| 231 | uInt stepsize = header_.nif*header_.nbeam;
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| 232 | uInt seqi = 0;
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| 233 | Bool getAll = False;
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| 234 | if (seq[n-1] == -1) getAll = True;
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| 235 | while ( (cursor_ <= seq[n-1]) || getAll) {
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| 236 | // only needs to be create if in seq
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| 237 | SDContainer sc(header_.nbeam,header_.nif,header_.npol,header_.nchan);
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| 238 | // iterate over one correlator integration cycle = nBeam*nIF
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| 239 | for (uInt row=0; row < stepsize; row++) {
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| 240 | // stepsize as well
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| 241 | // spectra(nChan,nPol)!!!
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| 242 | status = reader_->read(scanNo, cycleNo, mjd, interval, fieldName,
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| 243 | srcName, srcDir, srcPM, srcVel, IFno, refFreq,
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| 244 | bandwidth, freqInc, restFreq, tcal, tcalTime,
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| 245 | azimuth, elevation, parAngle, focusAxi,
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| 246 | focusTan, focusRot, temperature, pressure,
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| 247 | humidity, windSpeed, windAz, refBeam,
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| 248 | beamNo, direction, scanRate,
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| 249 | tsys, sigma, calFctr, baseLin, baseSub,
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| 250 | spectra, flagtra, xCalFctr, xPol);
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| 251 |
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| 252 | // Make sure beam/IF numbers are 0-relative - dealing with possible IF or Beam selection
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| 253 |
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| 254 | beamNo = beamNo - beamOffset_ - 1;
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| 255 | IFno = IFno - ifOffset_ - 1;
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| 256 | //
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| 257 | if (status) {
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| 258 | if (status == -1) {
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| 259 | // EOF.
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| 260 | if (row > 0 && row < stepsize-1)
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| 261 | cerr << "incomplete scan data.\n Probably means not all Beams/IFs/Pols within a scan are present." << endl;
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| 262 | //cerr << "EOF" << endl;
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| 263 | table_->putSDFreqTable(frequencies_);
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| 264 | return status;
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| 265 | }
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| 266 | }
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| 267 | // if in the given list
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| 268 | if (cursor_ == seq[seqi] || getAll) {
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| 269 | // add integration cycle
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| 270 | if (row==0) {
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| 271 | //add invariant info: scanNo, mjd, interval, fieldName,
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| 272 | //srcName, azimuth, elevation, parAngle, focusAxi, focusTan,
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| 273 | //focusRot, temperature, pressure, humidity, windSpeed,
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| 274 | //windAz srcDir, srcPM, srcVel
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| 275 | sc.timestamp = mjd;
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| 276 | sc.interval = interval;
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| 277 | sc.sourcename = srcName;
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| 278 | sc.fieldname = fieldName;
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| 279 | sc.azimuth = azimuth;
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| 280 | sc.elevation = elevation;
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| 281 | }
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| 282 | // add specific info
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| 283 | // refPix = nChan/2+1 in Integer arith.!
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| 284 | Int refPix = header_.nchan/2+1;
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| 285 | uInt frqslot = frequencies_.addFrequency(refPix, refFreq, freqInc);
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| 286 | frequencies_.addRestFrequency(restFreq);
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| 287 | //
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| 288 | sc.setFrequencyMap(frqslot,IFno);
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| 289 | sc.tcal[0] = tcal[0];sc.tcal[1] = tcal[1];
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| 290 | sc.tcaltime = tcalTime;
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| 291 | sc.parangle = parAngle;
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| 292 | sc.refbeam = refBeam;
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| 293 | sc.scanid = scanNo-1;//make it 0-based
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| 294 | sc.setSpectrum(spectra, beamNo, IFno);
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| 295 | sc.setFlags(flagtra, beamNo, IFno);
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| 296 | sc.setTsys(tsys, beamNo, IFno);
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| 297 | sc.setDirection(direction, beamNo);
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| 298 | }
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| 299 | }
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| 300 | if (cursor_ == seq[seqi] || getAll) {
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| 301 | // insert container into table/list
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| 302 | table_->putSDContainer(sc);
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| 303 | seqi++;// next in list
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| 304 | }
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| 305 | cursor_++;// increment position in file
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| 306 | }
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| 307 | table_->putSDFreqTable(frequencies_);
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| 308 | return status;
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| 309 | }
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