source: trunk/src/STWriter.cpp@ 990

Last change on this file since 990 was 988, checked in by mar637, 19 years ago

implemented data export for the asap2 Scantable as in Ticket #4.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 10.2 KB
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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 988 2006-04-05 04:31:47Z mar637 $
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== "FITS") {
68 writer_ = 0;
69 } else if (t== "ASCII") {
70 writer_ = 0;
71 } else {
72 throw (AipsError("Unrecognized export format"));
73 }
74}
75
76STWriter::~STWriter()
77{
78 if (writer_) {
79 delete writer_;
80 }
81}
82
83Int STWriter::setFormat(const std::string &format)
84{
85 if (format != format_) {
86 if (writer_) delete writer_;
87 }
88
89 format_ = format;
90 String t(format_);
91 t.upcase();
92 if (t== "MS2") {
93 writer_ = new PKSMS2writer();
94 } else if (t== "SDFITS") {
95 writer_ = new PKSSDwriter();
96 } else if (t== "FITS") {
97 writer_ = 0;
98 } else if (t== "ASCII") {
99 writer_ = 0;
100 } else {
101 throw (AipsError("Unrecognized Format"));
102 }
103 return 0;
104}
105
106Int STWriter::write(const CountedPtr<Scantable> in,
107 const std::string &filename)
108{
109
110// Image FITS
111
112 if (format_=="FITS") {
113// Bool verbose = True;
114// SDFITSImageWriter iw;
115// if (iw.write(*in, filename, verbose)) {
116// return 0;
117// } else {
118// return 1;
119// }
120 } else if (format_=="ASCII") {
121 STAsciiWriter iw;
122 if (iw.write(*in, filename)) {
123 return 0;
124 } else {
125 return 1;
126 }
127 }
128
129 // MS or SDFITS
130
131 // Extract the header from the table.
132 STHeader hdr = in->getHeader();
133 const Int nPol = hdr.npol;
134 const Int nChan = hdr.nchan;
135
136 const Table table = in->table();
137// ROArrayColumn<uInt> freqIDCol(table, "FREQ_ID");
138// Vector<uInt> freqIDs;
139
140 // Create the output file and write static data.
141 Int status;
142 Bool havexpol = Bool(in->npol() > 2);
143 if (status = writer_->create(filename, hdr.observer, hdr.project,
144 hdr.antennaname, hdr.antennaposition,
145 hdr.obstype, hdr.equinox, hdr.freqref,
146 nChan, nPol, False, havexpol)) {
147 throw(AipsError("Failed to create output file"));
148 }
149
150 Double srcVel = 0.0;
151
152 String fieldName, srcName, tcalTime;
153 Vector<Float> calFctr, sigma, tcal, tsys;
154 Vector<Double> direction(2), scanRate(2), srcDir(2), srcPM(2,0.0);
155 Matrix<Float> spectra;
156 Matrix<uChar> flagtra;
157 Complex xCalFctr;
158 Int count = 0;
159 Int scanno = 1;
160 // use spearate iterators to ensure renumbering of all numbers
161 TableIterator scanit(table, "SCANNO");
162 while (!scanit.pastEnd() ) {
163 Table stable = scanit.table();
164 TableIterator beamit(stable, "BEAMNO");
165 Int beamno = 1;
166 while (!beamit.pastEnd() ) {
167 Table btable = beamit.table();
168 // position only varies by beam
169 MDirection::ScalarColumn dirCol(btable, "DIRECTION");
170 Vector<Double> direction = dirCol(0).getAngle("rad").getValue();
171 TableIterator cycit(btable, "CYCLENO");
172 Int cycno = 1;
173 while (!cycit.pastEnd() ) {
174 Table ctable = cycit.table();
175 TableIterator ifit(ctable, "IFNO");
176 Int ifno = 1;
177 while (!ifit.pastEnd() ) {
178 Table itable = ifit.table();
179 TableRow row(itable);
180 // use the first row to fill in all the "metadata"
181 const TableRecord& rec = row.get(0);
182 ROArrayColumn<Float> specCol(itable, "SPECTRA");
183 uInt nchan = specCol(0).nelements();
184 Double cdelt,crval,crpix, restfreq;
185 Float focusAxi, focusTan, focusRot,
186 temperature, pressure, humidity, windSpeed, windAz;
187 Float tmp0,tmp1,tmp2,tmp3,tmp4;
188 Vector<Float> tcalval;
189 String stmp0,stmp1, tcalt;
190 in->frequencies().getEntry(crpix,crval,cdelt, rec.asuInt("FREQ_ID"));
191 in->focus().getEntry(focusAxi, focusTan, focusRot,
192 tmp0,tmp1,tmp2,tmp3,tmp4,
193 rec.asuInt("FOCUS_ID"));
194 in->molecules().getEntry(restfreq,stmp0,stmp1,rec.asuInt("MOLECULE_ID"));
195 in->tcal().getEntry(tcalt,tcalval,rec.asuInt("TCAL_ID"));
196 in->weather().getEntry(temperature, pressure, humidity,
197 windSpeed, windAz,
198 rec.asuInt("WEATHER_ID"));
199 Double pixel = Double(nchan/2);
200 Double refFreqNew = (pixel-crpix)*cdelt + crval;
201 // ok, now we have nrows for the n polarizations in this table
202 Matrix<Float> specs;
203 Matrix<uChar> flags;
204 Vector<Complex> xpol;
205 polConversion(specs, flags, xpol, itable);
206 Vector<Float> tsys = tsysFromTable(itable);
207 // dummy data
208 uInt npol = specs.ncolumn();
209
210 Matrix<Float> baseLin(npol,2, 0.0f);
211 Matrix<Float> baseSub(npol,9, 0.0f);
212 Complex xCalFctr;
213 Vector<Double> scanRate(2, 0.0);
214 Vector<Float> sigma(npol, 0.0f);
215 Vector<Float> calFctr(npol, 0.0f);
216 if (status = writer_->write(scanno, cycno, rec.asDouble("TIME"),
217 rec.asDouble("INTERVAL"),
218 rec.asString("FIELDNAME"),
219 rec.asString("SRCNAME"),
220 direction,
221 srcPM, srcVel, // not in scantable yet
222 ifno,
223 refFreqNew, nchan*abs(cdelt), cdelt,
224 restfreq,
225 tcal,
226 tcalt,
227 rec.asFloat("AZIMUTH"),
228 rec.asFloat("ELEVATION"),
229 rec.asFloat("PARANGLE"),
230 focusAxi, focusTan, focusRot,
231 temperature,
232 pressure, humidity, windSpeed, windAz,
233 rec.asInt("REFBEAMNO")+1, beamno,
234 direction,
235 scanRate,// not in scantable
236 tsys,
237 sigma, calFctr,// not in scantable
238 baseLin, baseSub,// not in scantable
239 specs, flags,
240 xCalFctr,//
241 xpol)
242 ) {
243 writer_->close();
244 throw(AipsError("STWriter: Failed to export Scantable."));
245 }
246
247 ++ifno;
248 ++ifit;
249 }
250 ++cycno;
251 ++cycit;
252 }
253 ++beamno;
254 ++beamit;
255 }
256 ++scanno;
257 ++scanit;
258 }
259 ostringstream oss;
260 oss << "STWriter: wrote " << count << " rows to " << filename << endl;
261 pushLog(String(oss));
262 writer_->close();
263
264 return 0;
265}
266
267Vector<Float> STWriter::tsysFromTable(const Table& tab)
268{
269 ROArrayColumn<Float> tsysCol(tab, "TSYS");
270 Vector<Float> out(tab.nrow());
271 Vector<Float> tmp;
272 for (uInt i=0; i<tab.nrow(); ++i) {
273 tmp.resize();
274 tmp = tsysCol(i);
275 out[i] = tmp[0];
276 }
277 return out;
278}
279
280void STWriter::polConversion( Matrix< Float >& specs, Matrix< uChar >& flags,
281 Vector< Complex > & xpol, const Table & tab )
282{
283 TableRow row(tab);
284 String poltype = tab.keywordSet().asString("POLTYPE");
285 if ( poltype != "linear") {
286 String msg = "poltype = " + poltype + " not yet supported in output.";
287 throw(AipsError(msg));
288 }
289 // use the first row to fill in all the "metadata"
290 const TableRecord& rec = row.get(0);
291 ROArrayColumn<Float> specCol(tab, "SPECTRA");
292 ROArrayColumn<uChar> flagCol(tab, "FLAGTRA");
293 uInt nchan = specCol(0).nelements();
294 uInt ncol = (tab.nrow()==1 ? 1: 2 );
295 specs.resize(nchan, ncol);
296 flags.resize(nchan, ncol);
297 // the linears
298 for (uInt i=0; i<ncol; ++i) {
299 specs.column(i) = specCol(i);
300 flags.column(i) = flagCol(i);
301 }
302 // now the complex if exists
303 Bool hasxpol = False;
304 xpol.resize();
305 if ( tab.nrow() == 4 ) {
306 hasxpol = True;
307 xpol.resize(nchan);
308 Vector<Float> reals, imags;
309 reals = specCol(2); imags = specCol(3);
310 for (uInt k=0; k < nchan; ++k) {
311 xpol[k] = Complex(reals[k], imags[k]);
312 }
313 }
314}
315
316
317}
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