1 | //#--------------------------------------------------------------------------- |
---|
2 | //# PKSMS2reader.cc: Class to read Parkes Multibeam data from a v2 MS. |
---|
3 | //#--------------------------------------------------------------------------- |
---|
4 | //# Copyright (C) 2000-2006 |
---|
5 | //# Associated Universities, Inc. Washington DC, USA. |
---|
6 | //# |
---|
7 | //# This library is free software; you can redistribute it and/or modify it |
---|
8 | //# under the terms of the GNU Library General Public License as published by |
---|
9 | //# the Free Software Foundation; either version 2 of the License, or (at your |
---|
10 | //# option) any later version. |
---|
11 | //# |
---|
12 | //# This library is distributed in the hope that it will be useful, but |
---|
13 | //# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
---|
14 | //# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
---|
15 | //# License for more details. |
---|
16 | //# |
---|
17 | //# You should have received a copy of the GNU Library General Public License |
---|
18 | //# along with this library; if not, write to the Free Software Foundation, |
---|
19 | //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
---|
20 | //# |
---|
21 | //# Correspondence concerning AIPS++ should be addressed as follows: |
---|
22 | //# Internet email: aips2-request@nrao.edu. |
---|
23 | //# Postal address: AIPS++ Project Office |
---|
24 | //# National Radio Astronomy Observatory |
---|
25 | //# 520 Edgemont Road |
---|
26 | //# Charlottesville, VA 22903-2475 USA |
---|
27 | //# |
---|
28 | //# $Id: PKSMS2reader.cc,v 19.11 2006/07/05 04:59:20 mcalabre Exp $ |
---|
29 | //#--------------------------------------------------------------------------- |
---|
30 | //# Original: 2000/08/03, Mark Calabretta, ATNF |
---|
31 | //#--------------------------------------------------------------------------- |
---|
32 | |
---|
33 | |
---|
34 | // AIPS++ includes. |
---|
35 | #include <casa/stdio.h> |
---|
36 | #include <casa/Arrays/ArrayMath.h> |
---|
37 | #include <casa/Arrays/Slice.h> |
---|
38 | #include <ms/MeasurementSets/MSColumns.h> |
---|
39 | #include <tables/Tables.h> |
---|
40 | |
---|
41 | // Parkes includes. |
---|
42 | #include <atnf/pks/pks_maths.h> |
---|
43 | #include <atnf/PKSIO/PKSMS2reader.h> |
---|
44 | |
---|
45 | |
---|
46 | //------------------------------------------------- PKSMS2reader::PKSMS2reader |
---|
47 | |
---|
48 | // Default constructor. |
---|
49 | |
---|
50 | PKSMS2reader::PKSMS2reader() |
---|
51 | { |
---|
52 | cMSopen = False; |
---|
53 | } |
---|
54 | |
---|
55 | //------------------------------------------------ PKSMS2reader::~PKSMS2reader |
---|
56 | |
---|
57 | PKSMS2reader::~PKSMS2reader() |
---|
58 | { |
---|
59 | close(); |
---|
60 | } |
---|
61 | |
---|
62 | //--------------------------------------------------------- PKSMS2reader::open |
---|
63 | |
---|
64 | // Open the MS for reading. |
---|
65 | |
---|
66 | Int PKSMS2reader::open( |
---|
67 | const String msName, |
---|
68 | Vector<Bool> &beams, |
---|
69 | Vector<Bool> &IFs, |
---|
70 | Vector<uInt> &nChan, |
---|
71 | Vector<uInt> &nPol, |
---|
72 | Vector<Bool> &haveXPol, |
---|
73 | Bool &haveBase, |
---|
74 | Bool &haveSpectra) |
---|
75 | { |
---|
76 | // Check that MS is readable. |
---|
77 | if (!MS::isReadable(msName)) { |
---|
78 | return 1; |
---|
79 | } |
---|
80 | |
---|
81 | if (cMSopen) { |
---|
82 | close(); |
---|
83 | } |
---|
84 | |
---|
85 | cPKSMS = MeasurementSet(msName); |
---|
86 | cIdx = 0; |
---|
87 | cNRow = cPKSMS.nrow(); |
---|
88 | cMSopen = True; |
---|
89 | |
---|
90 | // Lock the table for read access. |
---|
91 | cPKSMS.lock(False); |
---|
92 | |
---|
93 | // Main MS table and subtable column access. |
---|
94 | ROMSMainColumns msCols(cPKSMS); |
---|
95 | ROMSDataDescColumns dataDescCols(cPKSMS.dataDescription()); |
---|
96 | ROMSFeedColumns feedCols(cPKSMS.feed()); |
---|
97 | ROMSFieldColumns fieldCols(cPKSMS.field()); |
---|
98 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
---|
99 | ROMSPolarizationColumns polarizationCols(cPKSMS.polarization()); |
---|
100 | ROMSSourceColumns sourceCols(cPKSMS.source()); |
---|
101 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
---|
102 | ROMSStateColumns stateCols(cPKSMS.state()); |
---|
103 | ROMSSysCalColumns sysCalCols(cPKSMS.sysCal()); |
---|
104 | ROMSWeatherColumns weatherCols(cPKSMS.weather()); |
---|
105 | |
---|
106 | // Column accessors for required columns. |
---|
107 | cScanNoCol.reference(msCols.scanNumber()); |
---|
108 | cTimeCol.reference(msCols.time()); |
---|
109 | cIntervalCol.reference(msCols.interval()); |
---|
110 | |
---|
111 | cFieldIdCol.reference(msCols.fieldId()); |
---|
112 | cFieldNameCol.reference(fieldCols.name()); |
---|
113 | |
---|
114 | cSrcIdCol.reference(fieldCols.sourceId()); |
---|
115 | cSrcNameCol.reference(sourceCols.name()); |
---|
116 | cSrcDirCol.reference(sourceCols.direction()); |
---|
117 | cSrcPMCol.reference(sourceCols.properMotion()); |
---|
118 | cSrcRestFrqCol.reference(sourceCols.restFrequency()); |
---|
119 | |
---|
120 | cStateIdCol.reference(msCols.stateId()); |
---|
121 | cObsModeCol.reference(stateCols.obsMode()); |
---|
122 | |
---|
123 | cDataDescIdCol.reference(msCols.dataDescId()); |
---|
124 | cChanFreqCol.reference(spWinCols.chanFreq()); |
---|
125 | |
---|
126 | cWeatherTimeCol.reference(weatherCols.time()); |
---|
127 | cTemperatureCol.reference(weatherCols.temperature()); |
---|
128 | cPressureCol.reference(weatherCols.pressure()); |
---|
129 | cHumidityCol.reference(weatherCols.relHumidity()); |
---|
130 | |
---|
131 | cBeamNoCol.reference(msCols.feed1()); |
---|
132 | cPointingCol.reference(pointingCols.direction()); |
---|
133 | cSigmaCol.reference(msCols.sigma()); |
---|
134 | cNumReceptorCol.reference(feedCols.numReceptors()); |
---|
135 | |
---|
136 | // Optional columns. |
---|
137 | if ((cHaveSrcVel = cPKSMS.source().tableDesc().isColumn("SYSVEL"))) { |
---|
138 | cSrcVelCol.attach(cPKSMS.source(), "SYSVEL"); |
---|
139 | } |
---|
140 | |
---|
141 | if ((cHaveTsys = cPKSMS.sysCal().tableDesc().isColumn("TSYS"))) { |
---|
142 | cTsysCol.attach(cPKSMS.sysCal(), "TSYS"); |
---|
143 | } |
---|
144 | |
---|
145 | if ((cHaveCalFctr = cPKSMS.tableDesc().isColumn("CALFCTR"))) { |
---|
146 | cCalFctrCol.attach(cPKSMS, "CALFCTR"); |
---|
147 | } |
---|
148 | |
---|
149 | if ((cHaveBaseLin = cPKSMS.tableDesc().isColumn("BASELIN"))) { |
---|
150 | cBaseLinCol.attach(cPKSMS, "BASELIN"); |
---|
151 | cBaseSubCol.attach(cPKSMS, "BASESUB"); |
---|
152 | } |
---|
153 | |
---|
154 | // Spectral data should always be present. |
---|
155 | haveSpectra = True; |
---|
156 | cFloatDataCol.reference(msCols.floatData()); |
---|
157 | cFlagCol.reference(msCols.flag()); |
---|
158 | |
---|
159 | if ((cGetXPol = cPKSMS.isColumn(MSMainEnums::DATA))) { |
---|
160 | if ((cHaveXCalFctr = cPKSMS.tableDesc().isColumn("XCALFCTR"))) { |
---|
161 | cXCalFctrCol.attach(cPKSMS, "XCALFCTR"); |
---|
162 | } |
---|
163 | |
---|
164 | cDataCol.reference(msCols.data()); |
---|
165 | } |
---|
166 | |
---|
167 | // Find which beams are present in the data. |
---|
168 | Vector<Int> beamNos = cBeamNoCol.getColumn(); |
---|
169 | Int maxBeamNo = max(beamNos) + 1; |
---|
170 | beams.resize(maxBeamNo); |
---|
171 | |
---|
172 | beams = False; |
---|
173 | for (uInt irow = 0; irow < beamNos.nelements(); irow++) { |
---|
174 | beams(beamNos(irow)) = True; |
---|
175 | } |
---|
176 | |
---|
177 | |
---|
178 | // Number of IFs. |
---|
179 | uInt nIF = dataDescCols.nrow(); |
---|
180 | IFs.resize(nIF); |
---|
181 | IFs = True; |
---|
182 | |
---|
183 | // Number of polarizations and channels in each IF. |
---|
184 | ROScalarColumn<Int> spWinIdCol(dataDescCols.spectralWindowId()); |
---|
185 | ROScalarColumn<Int> numChanCol(spWinCols.numChan()); |
---|
186 | |
---|
187 | ROScalarColumn<Int> polIdCol(dataDescCols.polarizationId()); |
---|
188 | ROScalarColumn<Int> numPolCol(polarizationCols.numCorr()); |
---|
189 | |
---|
190 | nChan.resize(nIF); |
---|
191 | nPol.resize(nIF); |
---|
192 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
---|
193 | nChan(iIF) = numChanCol(spWinIdCol(iIF)); |
---|
194 | nPol(iIF) = numPolCol(polIdCol(iIF)); |
---|
195 | } |
---|
196 | |
---|
197 | // Cross-polarization data present? |
---|
198 | haveXPol.resize(nIF); |
---|
199 | haveXPol = False; |
---|
200 | |
---|
201 | if (cGetXPol) { |
---|
202 | for (Int irow = 0; irow < cNRow; irow++) { |
---|
203 | if (cDataCol.isDefined(irow)) { |
---|
204 | Int iIF = cDataDescIdCol(irow); |
---|
205 | haveXPol(iIF) = True; |
---|
206 | } |
---|
207 | } |
---|
208 | } |
---|
209 | |
---|
210 | |
---|
211 | // Initialize member data. |
---|
212 | cBeams.assign(beams); |
---|
213 | cIFs.assign(IFs); |
---|
214 | cNChan.assign(nChan); |
---|
215 | cNPol.assign(nPol); |
---|
216 | cHaveXPol.assign(haveXPol); |
---|
217 | |
---|
218 | |
---|
219 | // Default channel range selection. |
---|
220 | cStartChan.resize(nIF); |
---|
221 | cEndChan.resize(nIF); |
---|
222 | cRefChan.resize(nIF); |
---|
223 | |
---|
224 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
---|
225 | cStartChan(iIF) = 1; |
---|
226 | cEndChan(iIF) = cNChan(iIF); |
---|
227 | cRefChan(iIF) = cNChan(iIF)/2 + 1; |
---|
228 | } |
---|
229 | |
---|
230 | Slice all; |
---|
231 | cDataSel.resize(nIF); |
---|
232 | cDataSel = Slicer(all, all); |
---|
233 | |
---|
234 | cScanNo = 0; |
---|
235 | cCycleNo = 1; |
---|
236 | cTime = cTimeCol(0); |
---|
237 | |
---|
238 | return 0; |
---|
239 | } |
---|
240 | |
---|
241 | //---------------------------------------------------- PKSMS2reader::getHeader |
---|
242 | |
---|
243 | // Get parameters describing the data. |
---|
244 | |
---|
245 | Int PKSMS2reader::getHeader( |
---|
246 | String &observer, |
---|
247 | String &project, |
---|
248 | String &antName, |
---|
249 | Vector<Double> &antPosition, |
---|
250 | String &obsMode, |
---|
251 | Float &equinox, |
---|
252 | String &dopplerFrame, |
---|
253 | Double &mjd, |
---|
254 | Double &refFreq, |
---|
255 | Double &bandwidth) |
---|
256 | { |
---|
257 | if (!cMSopen) { |
---|
258 | return 1; |
---|
259 | } |
---|
260 | |
---|
261 | // Observer and project. |
---|
262 | ROMSObservationColumns observationCols(cPKSMS.observation()); |
---|
263 | observer = observationCols.observer()(0); |
---|
264 | project = observationCols.project()(0); |
---|
265 | |
---|
266 | // Antenna name and ITRF coordinates. |
---|
267 | ROMSAntennaColumns antennaCols(cPKSMS.antenna()); |
---|
268 | antName = antennaCols.name()(0); |
---|
269 | antPosition = antennaCols.position()(0); |
---|
270 | |
---|
271 | // Observation type. |
---|
272 | if (cObsModeCol.nrow()) { |
---|
273 | obsMode = cObsModeCol(0); |
---|
274 | if (obsMode == "\0") obsMode = "RF"; |
---|
275 | } else { |
---|
276 | obsMode = "RF"; |
---|
277 | } |
---|
278 | |
---|
279 | |
---|
280 | // Coordinate equinox. |
---|
281 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
---|
282 | String dirref = pointingCols.direction().keywordSet().asRecord("MEASINFO"). |
---|
283 | asString("Ref"); |
---|
284 | sscanf(dirref.chars()+1, "%f", &equinox); |
---|
285 | |
---|
286 | // Frequency/velocity reference frame. |
---|
287 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
---|
288 | dopplerFrame = MFrequency::showType(spWinCols.measFreqRef()(0)); |
---|
289 | |
---|
290 | // Translate to FITS standard names. |
---|
291 | if (dopplerFrame == "TOPO") { |
---|
292 | dopplerFrame = "TOPOCENT"; |
---|
293 | } else if (dopplerFrame == "GEO") { |
---|
294 | dopplerFrame = "GEOCENTR"; |
---|
295 | } else if (dopplerFrame == "BARY") { |
---|
296 | dopplerFrame = "BARYCENT"; |
---|
297 | } else if (dopplerFrame == "GALACTO") { |
---|
298 | dopplerFrame = "GALACTOC"; |
---|
299 | } else if (dopplerFrame == "LGROUP") { |
---|
300 | dopplerFrame = "LOCALGRP"; |
---|
301 | } else if (dopplerFrame == "CMB") { |
---|
302 | dopplerFrame = "CMBDIPOL"; |
---|
303 | } else if (dopplerFrame == "REST") { |
---|
304 | dopplerFrame = "SOURCE"; |
---|
305 | } |
---|
306 | |
---|
307 | // MJD at start of observation. |
---|
308 | mjd = cTimeCol(0)/86400.0; |
---|
309 | |
---|
310 | // Reference frequency and bandwidth. |
---|
311 | refFreq = spWinCols.refFrequency()(0); |
---|
312 | bandwidth = spWinCols.totalBandwidth()(0); |
---|
313 | |
---|
314 | return 0; |
---|
315 | } |
---|
316 | |
---|
317 | //-------------------------------------------------- PKSMS2reader::getFreqInfo |
---|
318 | |
---|
319 | // Get frequency parameters for each IF. |
---|
320 | |
---|
321 | Int PKSMS2reader::getFreqInfo( |
---|
322 | Vector<Double> &startFreq, |
---|
323 | Vector<Double> &endFreq) |
---|
324 | { |
---|
325 | uInt nIF = cIFs.nelements(); |
---|
326 | startFreq.resize(nIF); |
---|
327 | endFreq.resize(nIF); |
---|
328 | |
---|
329 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
---|
330 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
---|
331 | |
---|
332 | Int nChan = chanFreq.nelements(); |
---|
333 | startFreq(iIF) = chanFreq(0); |
---|
334 | endFreq(iIF) = chanFreq(nChan-1); |
---|
335 | } |
---|
336 | |
---|
337 | return 0; |
---|
338 | } |
---|
339 | |
---|
340 | //------------------------------------------------------- PKSMS2reader::select |
---|
341 | |
---|
342 | // Set data selection by beam number and channel. |
---|
343 | |
---|
344 | uInt PKSMS2reader::select( |
---|
345 | const Vector<Bool> beamSel, |
---|
346 | const Vector<Bool> IFsel, |
---|
347 | const Vector<Int> startChan, |
---|
348 | const Vector<Int> endChan, |
---|
349 | const Vector<Int> refChan, |
---|
350 | const Bool getSpectra, |
---|
351 | const Bool getXPol, |
---|
352 | const Bool getFeedPos) |
---|
353 | { |
---|
354 | if (!cMSopen) { |
---|
355 | return 1; |
---|
356 | } |
---|
357 | |
---|
358 | // Beam selection. |
---|
359 | uInt nBeam = cBeams.nelements(); |
---|
360 | uInt nBeamSel = beamSel.nelements(); |
---|
361 | for (uInt ibeam = 0; ibeam < nBeam; ibeam++) { |
---|
362 | if (ibeam < nBeamSel) { |
---|
363 | cBeams(ibeam) = beamSel(ibeam); |
---|
364 | } else { |
---|
365 | cBeams(ibeam) = False; |
---|
366 | } |
---|
367 | } |
---|
368 | |
---|
369 | uInt nIF = cIFs.nelements(); |
---|
370 | uInt maxNChan = 0; |
---|
371 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
---|
372 | // IF selection. |
---|
373 | if (iIF < IFsel.nelements()) { |
---|
374 | cIFs(iIF) = IFsel(iIF); |
---|
375 | } else { |
---|
376 | cIFs(iIF) = False; |
---|
377 | } |
---|
378 | |
---|
379 | if (!cIFs(iIF)) continue; |
---|
380 | |
---|
381 | |
---|
382 | // Channel selection. |
---|
383 | if (iIF < startChan.nelements()) { |
---|
384 | cStartChan(iIF) = startChan(iIF); |
---|
385 | |
---|
386 | if (cStartChan(iIF) <= 0) { |
---|
387 | cStartChan(iIF) += cNChan(iIF); |
---|
388 | } else if (cStartChan(iIF) > Int(cNChan(iIF))) { |
---|
389 | cStartChan(iIF) = cNChan(iIF); |
---|
390 | } |
---|
391 | } |
---|
392 | |
---|
393 | if (iIF < endChan.nelements()) { |
---|
394 | cEndChan(iIF) = endChan(iIF); |
---|
395 | |
---|
396 | if (cEndChan(iIF) <= 0) { |
---|
397 | cEndChan(iIF) += cNChan(iIF); |
---|
398 | } else if (cEndChan(iIF) > Int(cNChan(iIF))) { |
---|
399 | cEndChan(iIF) = cNChan(iIF); |
---|
400 | } |
---|
401 | } |
---|
402 | |
---|
403 | if (iIF < refChan.nelements()) { |
---|
404 | cRefChan(iIF) = refChan(iIF); |
---|
405 | } else { |
---|
406 | cRefChan(iIF) = cStartChan(iIF); |
---|
407 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
---|
408 | cRefChan(iIF) += (cEndChan(iIF) - cStartChan(iIF) + 1)/2; |
---|
409 | } else { |
---|
410 | cRefChan(iIF) -= (cStartChan(iIF) - cEndChan(iIF) + 1)/2; |
---|
411 | } |
---|
412 | } |
---|
413 | |
---|
414 | uInt nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
---|
415 | if (maxNChan < nChan) { |
---|
416 | maxNChan = nChan; |
---|
417 | } |
---|
418 | |
---|
419 | // Inverted Slices are not allowed. |
---|
420 | Slice outPols; |
---|
421 | Slice outChans(min(cStartChan(iIF),cEndChan(iIF))-1, nChan); |
---|
422 | cDataSel(iIF) = Slicer(outPols, outChans); |
---|
423 | } |
---|
424 | |
---|
425 | // Get spectral data? |
---|
426 | cGetSpectra = getSpectra; |
---|
427 | |
---|
428 | // Get cross-polarization data? |
---|
429 | cGetXPol = cGetXPol && getXPol; |
---|
430 | |
---|
431 | // Get feed positions? (Not available.) |
---|
432 | cGetFeedPos = False; |
---|
433 | |
---|
434 | return maxNChan; |
---|
435 | } |
---|
436 | |
---|
437 | //---------------------------------------------------- PKSMS2reader::findRange |
---|
438 | |
---|
439 | // Find the range of the data in time and position. |
---|
440 | |
---|
441 | Int PKSMS2reader::findRange( |
---|
442 | Int &nRow, |
---|
443 | Int &nSel, |
---|
444 | Vector<Double> &timeSpan, |
---|
445 | Matrix<Double> &positions) |
---|
446 | { |
---|
447 | if (!cMSopen) { |
---|
448 | return 1; |
---|
449 | } |
---|
450 | |
---|
451 | nRow = cNRow; |
---|
452 | |
---|
453 | // Find the number of rows selected. |
---|
454 | nSel = 0; |
---|
455 | Vector<Bool> sel(nRow); |
---|
456 | for (Int irow = 0; irow < nRow; irow++) { |
---|
457 | if ((sel(irow) = cBeams(cBeamNoCol(irow)) && |
---|
458 | cIFs(cDataDescIdCol(irow)))) { |
---|
459 | nSel++; |
---|
460 | } |
---|
461 | } |
---|
462 | |
---|
463 | // Find the time range (s). |
---|
464 | timeSpan.resize(2); |
---|
465 | timeSpan(0) = cTimeCol(0); |
---|
466 | timeSpan(1) = cTimeCol(nRow-1); |
---|
467 | |
---|
468 | // Retrieve positions for selected data. |
---|
469 | Int isel = 0; |
---|
470 | positions.resize(2,nSel); |
---|
471 | for (Int irow = 0; irow < nRow; irow++) { |
---|
472 | if (sel(irow)) { |
---|
473 | Matrix<Double> pointingDir = cPointingCol(cFieldIdCol(irow)); |
---|
474 | positions.column(isel++) = pointingDir.column(0); |
---|
475 | } |
---|
476 | } |
---|
477 | |
---|
478 | return 0; |
---|
479 | } |
---|
480 | |
---|
481 | //--------------------------------------------------------- PKSMS2reader::read |
---|
482 | |
---|
483 | // Read the next data record. |
---|
484 | |
---|
485 | Int PKSMS2reader::read( |
---|
486 | Int &scanNo, |
---|
487 | Int &cycleNo, |
---|
488 | Double &mjd, |
---|
489 | Double &interval, |
---|
490 | String &fieldName, |
---|
491 | String &srcName, |
---|
492 | Vector<Double> &srcDir, |
---|
493 | Vector<Double> &srcPM, |
---|
494 | Double &srcVel, |
---|
495 | String &obsMode, |
---|
496 | Int &IFno, |
---|
497 | Double &refFreq, |
---|
498 | Double &bandwidth, |
---|
499 | Double &freqInc, |
---|
500 | Double &restFreq, |
---|
501 | Vector<Float> &tcal, |
---|
502 | String &tcalTime, |
---|
503 | Float &azimuth, |
---|
504 | Float &elevation, |
---|
505 | Float &parAngle, |
---|
506 | Float &focusAxi, |
---|
507 | Float &focusTan, |
---|
508 | Float &focusRot, |
---|
509 | Float &temperature, |
---|
510 | Float &pressure, |
---|
511 | Float &humidity, |
---|
512 | Float &windSpeed, |
---|
513 | Float &windAz, |
---|
514 | Int &refBeam, |
---|
515 | Int &beamNo, |
---|
516 | Vector<Double> &direction, |
---|
517 | Vector<Double> &scanRate, |
---|
518 | Vector<Float> &tsys, |
---|
519 | Vector<Float> &sigma, |
---|
520 | Vector<Float> &calFctr, |
---|
521 | Matrix<Float> &baseLin, |
---|
522 | Matrix<Float> &baseSub, |
---|
523 | Matrix<Float> &spectra, |
---|
524 | Matrix<uChar> &flagged, |
---|
525 | Complex &xCalFctr, |
---|
526 | Vector<Complex> &xPol) |
---|
527 | { |
---|
528 | if (!cMSopen) { |
---|
529 | return 1; |
---|
530 | } |
---|
531 | |
---|
532 | // Check for EOF. |
---|
533 | if (cIdx >= cNRow) { |
---|
534 | return -1; |
---|
535 | } |
---|
536 | |
---|
537 | // Find the next selected beam and IF. |
---|
538 | Int ibeam; |
---|
539 | Int iIF; |
---|
540 | while (True) { |
---|
541 | ibeam = cBeamNoCol(cIdx); |
---|
542 | iIF = cDataDescIdCol(cIdx); |
---|
543 | if (cBeams(ibeam) && cIFs(iIF)) { |
---|
544 | break; |
---|
545 | } |
---|
546 | |
---|
547 | // Check for EOF. |
---|
548 | if (++cIdx >= cNRow) { |
---|
549 | return -1; |
---|
550 | } |
---|
551 | } |
---|
552 | |
---|
553 | // Renumerate scan no. Here still is 1-based |
---|
554 | scanNo = cScanNoCol(cIdx) - cScanNoCol(0) + 1; |
---|
555 | |
---|
556 | if (scanNo != cScanNo) { |
---|
557 | // Start of new scan. |
---|
558 | cScanNo = scanNo; |
---|
559 | cCycleNo = 1; |
---|
560 | cTime = cTimeCol(cIdx); |
---|
561 | } |
---|
562 | |
---|
563 | Double time = cTimeCol(cIdx); |
---|
564 | mjd = time/86400.0; |
---|
565 | interval = cIntervalCol(cIdx); |
---|
566 | |
---|
567 | // Reconstruct the integration cycle number; due to small latencies the |
---|
568 | // integration time is usually slightly less than the time between cycles, |
---|
569 | // resetting cTime will prevent the difference from accumulating. |
---|
570 | cCycleNo += nint((time - cTime)/interval); |
---|
571 | cycleNo = cCycleNo; |
---|
572 | cTime = time; |
---|
573 | |
---|
574 | Int fieldId = cFieldIdCol(cIdx); |
---|
575 | fieldName = cFieldNameCol(fieldId); |
---|
576 | |
---|
577 | Int srcId = cSrcIdCol(fieldId); |
---|
578 | srcName = cSrcNameCol(srcId); |
---|
579 | srcDir = cSrcDirCol(srcId); |
---|
580 | srcPM = cSrcPMCol(srcId); |
---|
581 | |
---|
582 | // Systemic velocity. |
---|
583 | if (!cHaveSrcVel) { |
---|
584 | srcVel = 0.0f; |
---|
585 | } else { |
---|
586 | srcVel = cSrcVelCol(srcId)(IPosition(1,0)); |
---|
587 | } |
---|
588 | |
---|
589 | // Observation type. |
---|
590 | Int stateId = cStateIdCol(cIdx); |
---|
591 | obsMode = cObsModeCol(stateId); |
---|
592 | |
---|
593 | IFno = iIF + 1; |
---|
594 | Int nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
---|
595 | |
---|
596 | // Minimal handling on continuum data. |
---|
597 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
---|
598 | if (nChan == 1) { |
---|
599 | cout << "The input is continuum data. "<< endl; |
---|
600 | freqInc = chanFreq(0); |
---|
601 | refFreq = chanFreq(0); |
---|
602 | restFreq = 0.0f; |
---|
603 | } else { |
---|
604 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
---|
605 | freqInc = chanFreq(1) - chanFreq(0); |
---|
606 | } else { |
---|
607 | freqInc = chanFreq(0) - chanFreq(1); |
---|
608 | } |
---|
609 | |
---|
610 | refFreq = chanFreq(cRefChan(iIF)-1); |
---|
611 | restFreq = cSrcRestFrqCol(srcId)(IPosition(1,0)); |
---|
612 | } |
---|
613 | bandwidth = abs(freqInc * nChan); |
---|
614 | |
---|
615 | tcal.resize(cNPol(iIF)); |
---|
616 | tcal = 0.0f; |
---|
617 | tcalTime = ""; |
---|
618 | azimuth = 0.0f; |
---|
619 | elevation = 0.0f; |
---|
620 | parAngle = 0.0f; |
---|
621 | focusAxi = 0.0f; |
---|
622 | focusTan = 0.0f; |
---|
623 | focusRot = 0.0f; |
---|
624 | |
---|
625 | // Find the appropriate entry in the WEATHER subtable. |
---|
626 | Vector<Double> wTimes = cWeatherTimeCol.getColumn(); |
---|
627 | Int weatherIdx; |
---|
628 | for (weatherIdx = wTimes.nelements()-1; weatherIdx >= 0; weatherIdx--) { |
---|
629 | if (cWeatherTimeCol(weatherIdx) <= time) { |
---|
630 | break; |
---|
631 | } |
---|
632 | } |
---|
633 | |
---|
634 | if (weatherIdx < 0) { |
---|
635 | // No appropriate WEATHER entry. |
---|
636 | pressure = 0.0f; |
---|
637 | humidity = 0.0f; |
---|
638 | temperature = 0.0f; |
---|
639 | } else { |
---|
640 | pressure = cPressureCol(weatherIdx); |
---|
641 | humidity = cHumidityCol(weatherIdx); |
---|
642 | temperature = cTemperatureCol(weatherIdx); |
---|
643 | } |
---|
644 | |
---|
645 | windSpeed = 0.0f; |
---|
646 | windAz = 0.0f; |
---|
647 | |
---|
648 | refBeam = 0; |
---|
649 | beamNo = ibeam + 1; |
---|
650 | |
---|
651 | Matrix<Double> pointingDir = cPointingCol(fieldId); |
---|
652 | direction = pointingDir.column(0); |
---|
653 | uInt ncols = pointingDir.ncolumn(); |
---|
654 | if (ncols == 1) { |
---|
655 | scanRate = 0.0f; |
---|
656 | } else { |
---|
657 | scanRate = pointingDir.column(1); |
---|
658 | } |
---|
659 | |
---|
660 | // Get Tsys assuming that entries in the SYSCAL table match the main table. |
---|
661 | if (cHaveTsys) { |
---|
662 | Int nTsysColRow = cTsysCol.nrow(); |
---|
663 | if (nTsysColRow != cNRow) { |
---|
664 | cHaveTsys=0; |
---|
665 | } |
---|
666 | } |
---|
667 | if (cHaveTsys) { |
---|
668 | cTsysCol.get(cIdx, tsys, True); |
---|
669 | } else { |
---|
670 | Int numReceptor; |
---|
671 | cNumReceptorCol.get(0, numReceptor); |
---|
672 | tsys.resize(numReceptor); |
---|
673 | tsys = 1.0f; |
---|
674 | } |
---|
675 | cSigmaCol.get(cIdx, sigma, True); |
---|
676 | |
---|
677 | // Calibration factors (if available). |
---|
678 | calFctr.resize(cNPol(iIF)); |
---|
679 | if (cHaveCalFctr) { |
---|
680 | cCalFctrCol.get(cIdx, calFctr); |
---|
681 | } else { |
---|
682 | calFctr = 0.0f; |
---|
683 | } |
---|
684 | |
---|
685 | // Baseline parameters (if available). |
---|
686 | if (cHaveBaseLin) { |
---|
687 | baseLin.resize(2,cNPol(iIF)); |
---|
688 | cBaseLinCol.get(cIdx, baseLin); |
---|
689 | |
---|
690 | baseSub.resize(9,cNPol(iIF)); |
---|
691 | cBaseSubCol.get(cIdx, baseSub); |
---|
692 | |
---|
693 | } else { |
---|
694 | baseLin.resize(0,0); |
---|
695 | baseSub.resize(0,0); |
---|
696 | } |
---|
697 | |
---|
698 | |
---|
699 | // Get spectral data. |
---|
700 | if (cGetSpectra) { |
---|
701 | Matrix<Float> tmpData; |
---|
702 | Matrix<Bool> tmpFlag; |
---|
703 | cFloatDataCol.getSlice(cIdx, cDataSel(iIF), tmpData, True); |
---|
704 | cFlagCol.getSlice(cIdx, cDataSel(iIF), tmpFlag, True); |
---|
705 | |
---|
706 | // Transpose spectra. |
---|
707 | Int nPol = tmpData.nrow(); |
---|
708 | spectra.resize(nChan, nPol); |
---|
709 | flagged.resize(nChan, nPol); |
---|
710 | if (cEndChan(iIF) >= cStartChan(iIF)) { |
---|
711 | // Simple transposition. |
---|
712 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
713 | for (Int ichan = 0; ichan < nChan; ichan++) { |
---|
714 | spectra(ichan,ipol) = tmpData(ipol,ichan); |
---|
715 | flagged(ichan,ipol) = tmpFlag(ipol,ichan); |
---|
716 | } |
---|
717 | } |
---|
718 | |
---|
719 | } else { |
---|
720 | // Transpose with inversion. |
---|
721 | Int jchan = nChan - 1; |
---|
722 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
723 | for (Int ichan = 0; ichan < nChan; ichan++, jchan--) { |
---|
724 | spectra(ichan,ipol) = tmpData(ipol,jchan); |
---|
725 | flagged(ichan,ipol) = tmpFlag(ipol,jchan); |
---|
726 | } |
---|
727 | } |
---|
728 | } |
---|
729 | } |
---|
730 | |
---|
731 | // Get cross-polarization data. |
---|
732 | if (cGetXPol) { |
---|
733 | if (cHaveXCalFctr) { |
---|
734 | cXCalFctrCol.get(cIdx, xCalFctr); |
---|
735 | } else { |
---|
736 | xCalFctr = Complex(0.0f, 0.0f); |
---|
737 | } |
---|
738 | |
---|
739 | cDataCol.get(cIdx, xPol, True); |
---|
740 | |
---|
741 | if (cEndChan(iIF) < cStartChan(iIF)) { |
---|
742 | Complex ctmp; |
---|
743 | Int jchan = nChan - 1; |
---|
744 | for (Int ichan = 0; ichan < nChan/2; ichan++, jchan--) { |
---|
745 | ctmp = xPol(ichan); |
---|
746 | xPol(ichan) = xPol(jchan); |
---|
747 | xPol(jchan) = ctmp; |
---|
748 | } |
---|
749 | } |
---|
750 | } |
---|
751 | |
---|
752 | cIdx++; |
---|
753 | |
---|
754 | return 0; |
---|
755 | } |
---|
756 | |
---|
757 | //--------------------------------------------------------- PKSMS2reader::read |
---|
758 | |
---|
759 | // Read the next data record, just the basics. |
---|
760 | |
---|
761 | Int PKSMS2reader::read( |
---|
762 | Int &IFno, |
---|
763 | Vector<Float> &tsys, |
---|
764 | Vector<Float> &calFctr, |
---|
765 | Matrix<Float> &baseLin, |
---|
766 | Matrix<Float> &baseSub, |
---|
767 | Matrix<Float> &spectra, |
---|
768 | Matrix<uChar> &flagged) |
---|
769 | { |
---|
770 | if (!cMSopen) { |
---|
771 | return 1; |
---|
772 | } |
---|
773 | |
---|
774 | // Check for EOF. |
---|
775 | if (cIdx >= cNRow) { |
---|
776 | return -1; |
---|
777 | } |
---|
778 | |
---|
779 | // Find the next selected beam and IF. |
---|
780 | Int ibeam; |
---|
781 | Int iIF; |
---|
782 | while (True) { |
---|
783 | ibeam = cBeamNoCol(cIdx); |
---|
784 | iIF = cDataDescIdCol(cIdx); |
---|
785 | if (cBeams(ibeam) && cIFs(iIF)) { |
---|
786 | break; |
---|
787 | } |
---|
788 | |
---|
789 | // Check for EOF. |
---|
790 | if (++cIdx >= cNRow) { |
---|
791 | return -1; |
---|
792 | } |
---|
793 | } |
---|
794 | |
---|
795 | IFno = iIF + 1; |
---|
796 | |
---|
797 | // Get Tsys assuming that entries in the SYSCAL table match the main table. |
---|
798 | cTsysCol.get(cIdx, tsys, True); |
---|
799 | |
---|
800 | // Calibration factors (if available). |
---|
801 | if (cHaveCalFctr) { |
---|
802 | cCalFctrCol.get(cIdx, calFctr, True); |
---|
803 | } else { |
---|
804 | calFctr.resize(cNPol(iIF)); |
---|
805 | calFctr = 0.0f; |
---|
806 | } |
---|
807 | |
---|
808 | // Baseline parameters (if available). |
---|
809 | if (cHaveBaseLin) { |
---|
810 | baseLin.resize(2,cNPol(iIF)); |
---|
811 | cBaseLinCol.get(cIdx, baseLin); |
---|
812 | |
---|
813 | baseSub.resize(9,cNPol(iIF)); |
---|
814 | cBaseSubCol.get(cIdx, baseSub); |
---|
815 | |
---|
816 | } else { |
---|
817 | baseLin.resize(0,0); |
---|
818 | baseSub.resize(0,0); |
---|
819 | } |
---|
820 | |
---|
821 | if (cGetSpectra) { |
---|
822 | // Get spectral data. |
---|
823 | Matrix<Float> tmpData; |
---|
824 | Matrix<Bool> tmpFlag; |
---|
825 | cFloatDataCol.getSlice(cIdx, cDataSel(iIF), tmpData, True); |
---|
826 | cFlagCol.getSlice(cIdx, cDataSel(iIF), tmpFlag, True); |
---|
827 | |
---|
828 | // Transpose spectra. |
---|
829 | Int nChan = tmpData.ncolumn(); |
---|
830 | Int nPol = tmpData.nrow(); |
---|
831 | spectra.resize(nChan, nPol); |
---|
832 | flagged.resize(nChan, nPol); |
---|
833 | if (cEndChan(iIF) >= cStartChan(iIF)) { |
---|
834 | // Simple transposition. |
---|
835 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
836 | for (Int ichan = 0; ichan < nChan; ichan++) { |
---|
837 | spectra(ichan,ipol) = tmpData(ipol,ichan); |
---|
838 | flagged(ichan,ipol) = tmpFlag(ipol,ichan); |
---|
839 | } |
---|
840 | } |
---|
841 | |
---|
842 | } else { |
---|
843 | // Transpose with inversion. |
---|
844 | Int jchan = nChan - 1; |
---|
845 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
846 | for (Int ichan = 0; ichan < nChan; ichan++, jchan--) { |
---|
847 | spectra(ichan,ipol) = tmpData(ipol,jchan); |
---|
848 | flagged(ichan,ipol) = tmpFlag(ipol,jchan); |
---|
849 | } |
---|
850 | } |
---|
851 | } |
---|
852 | } |
---|
853 | |
---|
854 | cIdx++; |
---|
855 | |
---|
856 | return 0; |
---|
857 | } |
---|
858 | |
---|
859 | //-------------------------------------------------------- PKSMS2reader::close |
---|
860 | |
---|
861 | // Close the MS. |
---|
862 | |
---|
863 | void PKSMS2reader::close() |
---|
864 | { |
---|
865 | cPKSMS = MeasurementSet(); |
---|
866 | cMSopen = False; |
---|
867 | } |
---|