source: trunk/src/STWriter.cpp@ 1436

Last change on this file since 1436 was 1410, checked in by Malte Marquarding, 17 years ago

Mark C added brightness unit to PKSreader/writer

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 11.3 KB
Line 
1//#---------------------------------------------------------------------------
2//# STWriter.cc: ASAP class to write out single dish spectra.
3//#---------------------------------------------------------------------------
4//# Copyright (C) 2004
5//# ATNF
6//#
7//# This program is free software; you can redistribute it and/or modify it
8//# under the terms of the GNU General Public License as published by the Free
9//# Software Foundation; either version 2 of the License, or (at your option)
10//# any later version.
11//#
12//# This program is distributed in the hope that it will be useful, but
13//# WITHOUT ANY WARRANTY; without even the implied warranty of
14//# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15//# Public License for more details.
16//#
17//# You should have received a copy of the GNU General Public License along
18//# with this program; if not, write to the Free Software Foundation, Inc.,
19//# 675 Massachusetts Ave, Cambridge, MA 02139, USA.
20//#
21//# Correspondence concerning this software should be addressed as follows:
22//# Internet email: Malte.Marquarding@csiro.au
23//# Postal address: Malte Marquarding,
24//# Australia Telescope National Facility,
25//# P.O. Box 76,
26//# Epping, NSW, 2121,
27//# AUSTRALIA
28//#
29//# $Id: STWriter.cpp 1410 2008-01-31 04:15:02Z MalteMarquarding $
30//#---------------------------------------------------------------------------
31
32#include <string>
33
34#include <casa/aips.h>
35#include <casa/Arrays/Array.h>
36#include <casa/Arrays/Vector.h>
37#include <casa/BasicSL/Complex.h>
38#include <casa/Utilities/CountedPtr.h>
39#include <casa/Utilities/Assert.h>
40
41#include <atnf/PKSIO/PKSMS2writer.h>
42#include <atnf/PKSIO/PKSSDwriter.h>
43
44#include <tables/Tables/Table.h>
45#include <tables/Tables/TableIter.h>
46#include <tables/Tables/TableRow.h>
47#include <tables/Tables/ArrayColumn.h>
48
49//#include "SDFITSImageWriter.h"
50#include "STAsciiWriter.h"
51#include "STHeader.h"
52
53#include "STWriter.h"
54
55using namespace casa;
56namespace asap {
57
58STWriter::STWriter(const std::string &format)
59{
60 format_ = format;
61 String t(format_);
62 t.upcase();
63 if (t== "MS2") {
64 writer_ = new PKSMS2writer();
65 } else if (t== "SDFITS") {
66 writer_ = new PKSSDwriter();
67 } else if (t== "ASCII") {
68 writer_ = 0;
69 } else {
70 throw (AipsError("Unrecognized export format"));
71 }
72}
73
74STWriter::~STWriter()
75{
76 if (writer_) {
77 delete writer_;
78 }
79}
80
81Int STWriter::setFormat(const std::string &format)
82{
83 if (format != format_) {
84 if (writer_) delete writer_;
85 }
86
87 format_ = format;
88 String t(format_);
89 t.upcase();
90 if (t== "MS2") {
91 writer_ = new PKSMS2writer();
92 } else if (t== "SDFITS") {
93 writer_ = new PKSSDwriter();
94 } else if (t== "ASCII") {
95 writer_ = 0;
96 } else {
97 throw (AipsError("Unrecognized Format"));
98 }
99 return 0;
100}
101
102Int STWriter::write(const CountedPtr<Scantable> in,
103 const std::string &filename)
104{
105
106 if (format_=="ASCII") {
107 STAsciiWriter iw;
108 if (iw.write(*in, filename)) {
109 return 0;
110 } else {
111 return 1;
112 }
113 }
114
115 // MS or SDFITS
116
117 // Extract the header from the table.
118 // this is a little different from what I have done
119 // before. Need to check with the Offline User Test data
120 STHeader hdr = in->getHeader();
121 //const Int nPol = hdr.npol;
122 //const Int nChan = hdr.nchan;
123 std::vector<uint> ifs = in->getIFNos();
124 int nIF = in->nif();//ifs.size();
125 Vector<uInt> nPol(nIF),nChan(nIF);
126 Vector<Bool> havexpol(nIF);
127 String fluxUnit = hdr.fluxunit;
128
129 nPol = 0;nChan = 0; havexpol = False;
130 for (uint i=0;i<ifs.size();++i) {
131 nPol(ifs[i]) = in->npol();
132 nChan(ifs[i]) = in->nchan(ifs[i]);
133 havexpol(ifs[i]) = nPol(ifs[i]) > 2;
134 }
135
136 const Table table = in->table();
137
138 // Create the output file and write static data.
139 Int status;
140 status = writer_->create(String(filename), hdr.observer, hdr.project,
141 hdr.antennaname, hdr.antennaposition,
142 hdr.obstype, hdr.fluxunit,
143 hdr.equinox, hdr.freqref,
144 nChan, nPol, havexpol, False);
145 if ( status ) {
146 throw(AipsError("Failed to create output file"));
147 }
148
149 Double srcVel;
150
151 String fieldName, srcName, tcalTime;
152 Vector<Float> calFctr, sigma, tcal, tsys;
153 Vector<Double> direction(2), scanRate(2), srcDir(2), srcPM(2);
154 Matrix<Float> spectra;
155 Matrix<uChar> flagtra;
156 Complex xCalFctr;
157 Int count = 0;
158 Int scanno = 1;
159 // use spearate iterators to ensure renumbering of all numbers
160 TableIterator scanit(table, "SCANNO");
161 while (!scanit.pastEnd() ) {
162 Table stable = scanit.table();
163 TableIterator beamit(stable, "BEAMNO");
164 Int beamno = 1;
165 while (!beamit.pastEnd() ) {
166 Table btable = beamit.table();
167 TableIterator cycit(btable, "CYCLENO");
168 ROArrayColumn<Double> srateCol(btable, "SCANRATE");
169 srateCol.get(0, scanRate);
170 ROArrayColumn<Double> spmCol(btable, "SRCPROPERMOTION");
171 spmCol.get(0, srcPM);
172 ROArrayColumn <Double> sdirCol(btable, "SRCDIRECTION");
173 sdirCol.get(0, srcDir);
174 ROScalarColumn<Double> svelCol(btable, "SRCVELOCITY");
175 svelCol.get(0, srcVel);
176 ROScalarColumn<uInt> bCol(btable, "BEAMNO");
177 beamno = bCol(0)+1;
178 Int cycno = 1;
179 while (!cycit.pastEnd() ) {
180 Table ctable = cycit.table();
181 TableIterator ifit(ctable, "IFNO");
182 MDirection::ScalarColumn dirCol(ctable, "DIRECTION");
183 Vector<Double> direction = dirCol(0).getAngle("rad").getValue();
184 Int ifno = 1;
185 while (!ifit.pastEnd() ) {
186 Table itable = ifit.table();
187 TableRow row(itable);
188 // use the first row to fill in all the "metadata"
189 const TableRecord& rec = row.get(0);
190 ROArrayColumn<Float> specCol(itable, "SPECTRA");
191 ifno = rec.asuInt("IFNO")+1;
192 uInt nchan = specCol(0).nelements();
193 Double cdelt,crval,crpix, restfreq;
194 Float focusAxi, focusTan, focusRot,
195 temperature, pressure, humidity, windSpeed, windAz;
196 Float tmp0,tmp1,tmp2,tmp3,tmp4;
197 Vector<Float> tcalval;
198 String stmp0,stmp1, tcalt;
199 in->frequencies().getEntry(crpix,crval,cdelt, rec.asuInt("FREQ_ID"));
200 in->focus().getEntry(focusAxi, focusTan, focusRot,
201 tmp0,tmp1,tmp2,tmp3,tmp4,
202 rec.asuInt("FOCUS_ID"));
203 in->molecules().getEntry(restfreq,stmp0,stmp1,rec.asuInt("MOLECULE_ID"));
204 in->tcal().getEntry(tcalt,tcalval,rec.asuInt("TCAL_ID"));
205 in->weather().getEntry(temperature, pressure, humidity,
206 windSpeed, windAz,
207 rec.asuInt("WEATHER_ID"));
208 Double pixel = Double(nchan/2);
209 Double refFreqNew = (pixel-crpix)*cdelt + crval;
210 // ok, now we have nrows for the n polarizations in this table
211 Matrix<Float> specs;
212 Matrix<uChar> flags;
213 Vector<Complex> xpol;
214 polConversion(specs, flags, xpol, itable);
215 Vector<Float> tsys = tsysFromTable(itable);
216 // dummy data
217 uInt npol = specs.ncolumn();
218
219 Matrix<Float> baseLin(npol,2, 0.0f);
220 Matrix<Float> baseSub(npol,9, 0.0f);
221 Complex xCalFctr;
222 Vector<Double> scanRate(2, 0.0);
223 Vector<Float> sigma(npol, 0.0f);
224 Vector<Float> calFctr(npol, 0.0f);
225 status = writer_->write(scanno, cycno, rec.asDouble("TIME"),
226 rec.asDouble("INTERVAL"),
227 rec.asString("FIELDNAME"),
228 rec.asString("SRCNAME"),
229 srcDir, srcPM, srcVel,hdr.obstype,
230 ifno,
231 refFreqNew, nchan*abs(cdelt), cdelt,
232 restfreq,
233 tcal,
234 tcalt,
235 rec.asFloat("AZIMUTH"),
236 rec.asFloat("ELEVATION"),
237 rec.asFloat("PARANGLE"),
238 focusAxi, focusTan, focusRot,
239 temperature,
240 pressure, humidity, windSpeed, windAz,
241 rec.asInt("REFBEAMNO")+1, beamno,
242 direction,
243 scanRate,
244 tsys,
245 sigma, calFctr,// not in scantable
246 baseLin, baseSub,// not in scantable
247 specs, flags,
248 xCalFctr,//
249 xpol);
250 if ( status ) {
251 writer_->close();
252 throw(AipsError("STWriter: Failed to export Scantable."));
253 }
254 ++count;
255 //++ifno;
256 ++ifit;
257 }
258 ++cycno;
259 ++cycit;
260 }
261 //++beamno;
262 ++beamit;
263 }
264 ++scanno;
265 ++scanit;
266 }
267 ostringstream oss;
268 oss << "STWriter: wrote " << count << " rows to " << filename;
269 pushLog(String(oss));
270 writer_->close();
271 //if MS2 delete POINTING table exists and copy the one in the keyword
272 if ( format_ == "MS2" ) {
273 replacePtTab(table, filename);
274 }
275 return 0;
276}
277
278Vector<Float> STWriter::tsysFromTable(const Table& tab)
279{
280 ROArrayColumn<Float> tsysCol(tab, "TSYS");
281 Vector<Float> out(tab.nrow());
282 Vector<Float> tmp;
283 for (uInt i=0; i<tab.nrow(); ++i) {
284 tmp.resize();
285 tmp = tsysCol(i);
286 out[i] = tmp[0];
287 }
288 return out;
289}
290
291void STWriter::polConversion( Matrix< Float >& specs, Matrix< uChar >& flags,
292 Vector< Complex > & xpol, const Table & tab )
293{
294 String poltype = tab.keywordSet().asString("POLTYPE");
295 if ( poltype == "stokes") {
296 String msg = "poltype = " + poltype + " not yet supported in output.";
297 throw(AipsError(msg));
298 }
299 ROArrayColumn<Float> specCol(tab, "SPECTRA");
300 ROArrayColumn<uChar> flagCol(tab, "FLAGTRA");
301 uInt nchan = specCol(0).nelements();
302 uInt ncol = (tab.nrow()==1 ? 1: 2 );
303 specs.resize(nchan, ncol);
304 flags.resize(nchan, ncol);
305 // the linears
306 for (uInt i=0; i<ncol; ++i) {
307 specs.column(i) = specCol(i);
308 flags.column(i) = flagCol(i);
309 }
310 // now the complex if exists
311 Bool hasxpol = False;
312 xpol.resize();
313 if ( tab.nrow() == 4 ) {
314 hasxpol = True;
315 xpol.resize(nchan);
316 Vector<Float> reals, imags;
317 reals = specCol(2); imags = specCol(3);
318 for (uInt k=0; k < nchan; ++k) {
319 xpol[k] = Complex(reals[k], imags[k]);
320 }
321 }
322}
323
324// For writing MS data, if there is the reference to
325// original pointing table it replace it by it.
326void STWriter::replacePtTab (const Table& tab, const std::string& fname)
327{
328 String oldPtTabName = fname;
329 oldPtTabName.append("/POINTING");
330 if ( tab.keywordSet().isDefined("POINTING") ) {
331 String PointingTab = tab.keywordSet().asString("POINTING");
332 if ( Table::isReadable(PointingTab) ) {
333 Table newPtTab(PointingTab, Table::Old);
334 newPtTab.copy(oldPtTabName, Table::New);
335 ostringstream oss;
336 oss << "STWriter: copied " <<PointingTab << " to " << fname;
337 pushLog(String(oss));
338 }
339 }
340}
341
342}
Note: See TracBrowser for help on using the repository browser.