source: trunk/src/SDFITSImageWriter.cc@ 376

Last change on this file since 376 was 287, checked in by kil064, 20 years ago

trak change to SDMemTable interface

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 7.8 KB
Line 
1//#---------------------------------------------------------------------------
2//# SDFITSImageWriter.cc: ASAP class to write out single dish spectra as FITS images
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: SDFITSImageWriter.cc 287 2005-01-24 06:54:22Z kil064 $
30//#---------------------------------------------------------------------------
31
32#include "SDFITSImageWriter.h"
33
34#include <casa/aips.h>
35#include <casa/Arrays/Array.h>
36#include <casa/Arrays/Vector.h>
37#include <casa/Arrays/VectorIter.h>
38#include <casa/Utilities/CountedPtr.h>
39#include <casa/OS/Directory.h>
40
41#include <coordinates/Coordinates/CoordinateUtil.h>
42#include <coordinates/Coordinates/CoordinateSystem.h>
43#include <coordinates/Coordinates/SpectralCoordinate.h>
44#include <coordinates/Coordinates/DirectionCoordinate.h>
45#include <coordinates/Coordinates/StokesCoordinate.h>
46#include <coordinates/Coordinates/ObsInfo.h>
47
48#include <images/Images/ImageFITSConverter.h>
49#include <images/Images/TempImage.h>
50
51#include <lattices/Lattices/ArrayLattice.h>
52
53#include <measures/Measures/MEpoch.h>
54
55#include <tables/Tables/Table.h>
56#include <tables/Tables/ScalarColumn.h>
57#include <tables/Tables/ArrayColumn.h>
58
59#include "SDDefs.h"
60#include "SDContainer.h"
61#include "SDMemTable.h"
62
63using namespace casa;
64using namespace asap;
65
66
67SDFITSImageWriter::SDFITSImageWriter()
68{;}
69
70SDFITSImageWriter::~SDFITSImageWriter()
71{;}
72
73
74Bool SDFITSImageWriter::write(const SDMemTable& sdTable,
75 const String& dirName, Bool verbose)
76{
77
78// Get global Header from Table
79
80 SDHeader header = sdTable.getSDHeader();
81 MEpoch::Ref timeRef(sdTable.getTimeReference());
82 MDirection::Types dirRef = sdTable.getDirectionReference();
83
84// Prepare initial ObsInfo
85
86 ObsInfo oi;
87 oi.setTelescope(String(header.antennaname));
88 oi.setObserver(String(header.observer));
89
90// Column keywords
91
92 Table tab = sdTable.table();
93 ROArrayColumn<Double> dirCol(tab, String("DIRECTION"));
94 ROScalarColumn<Double> timeCol(tab, "TIME");
95 ROArrayColumn<uInt> freqidCol(tab, "FREQID");
96 ROScalarColumn<String> srcCol(tab, "SRCNAME");
97
98// Output Image Shape; spectral axis to be updated
99
100 IPosition shapeOut(4,1); // spectral, direction (2), stokes
101
102// Axes (should be in header)
103
104 const uInt beamAxis = asap::BeamAxis;
105 const uInt ifAxis = asap::IFAxis;
106 const uInt stokesAxis = asap::PolAxis;
107 const uInt chanAxis = asap::ChanAxis;
108 const Unit RAD(String("rad"));
109
110// Output Directory
111
112 String dirName2(dirName);
113 if (dirName.length()==0) {
114 dirName2 = String("asap_FITS");
115 }
116 Directory dir(dirName2);
117 dir.create(True);
118 cerr << "Created directory '" << dirName2 << "' for output files" << endl;
119
120// Temps
121
122 Vector<Int> whichStokes(1,1);
123 Array<Double> whichDir;
124 Vector<Double> lonLat(2);
125 IPosition posDir(2,0);
126 Projection proj(Projection::SIN); // What should we use ?
127 Matrix<Double> xForm(2,2);
128 xForm = 0.0; xForm.diagonal() = 1.0;
129 Vector<Double> incLonLat(2,0.0);
130 Vector<Double> refPixLonLat(2,0.0);
131
132// Loop over rows
133
134 uInt maxMem = 128;
135 Bool preferVelocity = False;
136 Bool opticalVelocity = False;
137 Int bitPix = -32; // FLoating point
138 Float minPix = 1.0;
139 Float maxPix = -1.0;
140 Bool overWrite = True;
141 Bool degLast = False;
142 Bool reallyVerbose = False;
143//
144 String errMsg;
145 const uInt nRows = sdTable.nRow();
146 for (uInt iRow=0; iRow<nRows; iRow++) {
147
148// Get data
149
150 const MaskedArray<Float>& dataIn(sdTable.rowAsMaskedArray(iRow));
151 const Array<Float>& values = dataIn.getArray();
152 const Array<Bool>& mask = dataIn.getMask();
153 const IPosition& shapeIn = dataIn.shape();
154 shapeOut(0) = shapeIn(chanAxis);
155 TiledShape tShapeOut(shapeOut);
156
157// Update ObsInfo (time changes per integration)
158
159 Double dTmp;
160 timeCol.get(iRow, dTmp);
161 MVEpoch tmp2(Quantum<Double>(dTmp, Unit(String("d"))));
162 MEpoch epoch(tmp2, timeRef);
163 oi.setObsDate(epoch);
164
165// Iterate through data in this row by spectra
166
167 ReadOnlyVectorIterator<Float> itData(values, chanAxis);
168 ReadOnlyVectorIterator<Bool> itMask(mask, chanAxis);
169 while (!itData.pastEnd()) {
170 const IPosition& pos = itData.pos();
171
172// Form SpectralCoordinate
173
174 Vector<uInt> iTmp;
175 freqidCol.get(iRow, iTmp);
176 SpectralCoordinate sC = sdTable.getSpectralCoordinate(iTmp(pos(ifAxis)), iRow);
177
178// Form DirectionCoordinate
179
180 dirCol.get(iRow, whichDir);
181 posDir(0) = pos(beamAxis);
182 posDir(1) = 0;
183 lonLat[0] = whichDir(posDir);
184//
185 posDir(0) = pos(beamAxis);
186 posDir(1) = 1;
187 lonLat[1] = whichDir(posDir);
188 DirectionCoordinate dC(dirRef, proj, lonLat[0], lonLat[1],
189 incLonLat[0], incLonLat[1], xForm,
190 refPixLonLat[0], refPixLonLat[1]);
191
192// Form Stokes Coordinate (no true Stokes info yet);
193
194 whichStokes(0) = convertStokes(pos(stokesAxis));
195 StokesCoordinate stC(whichStokes);
196
197// Create CoordinateSystem
198
199 CoordinateSystem cSys;
200 cSys.addCoordinate(sC);
201 cSys.addCoordinate(dC);
202 cSys.addCoordinate(stC);
203 cSys.setObsInfo(oi);
204
205// Reform data into correct shape for output
206
207 Array<Float> t1(itData.array().reform(shapeOut));
208 Array<Bool> m1(itMask.array().reform(shapeOut));
209
210// Create aips++ Image
211
212 TempImage<Float> tIm(tShapeOut, cSys);
213 tIm.put(t1);
214//
215 ArrayLattice<Bool> latMask(m1);
216 tIm.attachMask(latMask);
217
218// Write out as FITS Image file
219
220 ostringstream oss;
221 oss << "row" << iRow << "_beam" << pos(0) << "_if"
222 << pos(1) << "_pol" << pos(2) << "_" << srcCol(iRow) << ".fits";
223 String tS(oss);
224 String fileName = dirName2 + String("/") + tS;
225 if (verbose) cerr << "Writing row " << iRow
226 << " into file '" << tS << "'" << endl;
227//
228 Bool ok = ImageFITSConverter::ImageToFITS(errMsg, tIm, fileName,
229 maxMem, preferVelocity,
230 opticalVelocity, bitPix,
231 minPix, maxPix, overWrite,
232 degLast, reallyVerbose);
233 if (!ok) {
234 cerr << "Error writing fits - " << errMsg << endl;
235 }
236
237// Next spectrum
238
239 itData.next();
240 itMask.next();
241 }
242 }
243//
244 if (!verbose) {
245 cerr << "Wrote " << nRows << " into individual FITS files" << endl;
246 }
247//
248 return True;
249}
250
251
252Int SDFITSImageWriter::convertStokes(Int val)
253{
254 Stokes::StokesTypes stokes = Stokes::RR;
255 if (val==0) {
256 stokes = Stokes::XX;
257 } else if (val==1) {
258 stokes = Stokes::YY;
259 } else if (val==2) {
260 stokes = Stokes::XY;
261 } else if (val==3) {
262 stokes = Stokes::YX;
263 } else {
264 stokes = Stokes::Undefined;
265 }
266//
267 return Int(stokes);
268}
Note: See TracBrowser for help on using the repository browser.