[1325] | 1 | //#--------------------------------------------------------------------------- |
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| 2 | //# PKSMS2reader.cc: Class to read Parkes Multibeam data from a v2 MS. |
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| 3 | //#--------------------------------------------------------------------------- |
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| 4 | //# Copyright (C) 2000-2006 |
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| 5 | //# Associated Universities, Inc. Washington DC, USA. |
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| 6 | //# |
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| 7 | //# This library is free software; you can redistribute it and/or modify it |
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| 8 | //# under the terms of the GNU Library General Public License as published by |
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| 9 | //# the Free Software Foundation; either version 2 of the License, or (at your |
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| 10 | //# option) any later version. |
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| 11 | //# |
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| 12 | //# This library 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 MERCHANTABILITY |
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| 14 | //# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
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| 15 | //# License for more details. |
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| 16 | //# |
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| 17 | //# You should have received a copy of the GNU Library General Public License |
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| 18 | //# along with this library; if not, write to the Free Software Foundation, |
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| 19 | //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
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| 20 | //# |
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| 21 | //# Correspondence concerning AIPS++ should be addressed as follows: |
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| 22 | //# Internet email: aips2-request@nrao.edu. |
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| 23 | //# Postal address: AIPS++ Project Office |
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| 24 | //# National Radio Astronomy Observatory |
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| 25 | //# 520 Edgemont Road |
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| 26 | //# Charlottesville, VA 22903-2475 USA |
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| 27 | //# |
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| 28 | //# $Id: PKSMS2reader.cc,v 19.11 2006/07/05 04:59:20 mcalabre Exp $ |
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| 29 | //#--------------------------------------------------------------------------- |
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| 30 | //# Original: 2000/08/03, Mark Calabretta, ATNF |
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| 31 | //#--------------------------------------------------------------------------- |
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| 32 | |
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| 33 | |
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| 34 | // AIPS++ includes. |
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| 35 | #include <casa/stdio.h> |
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| 36 | #include <casa/Arrays/ArrayMath.h> |
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| 37 | #include <casa/Arrays/Slice.h> |
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| 38 | #include <ms/MeasurementSets/MSColumns.h> |
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| 39 | #include <tables/Tables.h> |
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| 40 | |
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| 41 | // Parkes includes. |
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| 42 | #include <atnf/pks/pks_maths.h> |
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| 43 | #include <atnf/PKSIO/PKSMS2reader.h> |
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| 44 | |
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| 45 | |
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| 46 | //------------------------------------------------- PKSMS2reader::PKSMS2reader |
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| 47 | |
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| 48 | // Default constructor. |
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| 49 | |
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| 50 | PKSMS2reader::PKSMS2reader() |
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| 51 | { |
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| 52 | cMSopen = False; |
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| 53 | } |
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| 54 | |
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| 55 | //------------------------------------------------ PKSMS2reader::~PKSMS2reader |
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| 56 | |
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| 57 | PKSMS2reader::~PKSMS2reader() |
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| 58 | { |
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| 59 | close(); |
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| 60 | } |
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| 61 | |
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| 62 | //--------------------------------------------------------- PKSMS2reader::open |
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| 63 | |
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| 64 | // Open the MS for reading. |
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| 65 | |
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| 66 | Int PKSMS2reader::open( |
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| 67 | const String msName, |
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| 68 | Vector<Bool> &beams, |
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| 69 | Vector<Bool> &IFs, |
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| 70 | Vector<uInt> &nChan, |
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| 71 | Vector<uInt> &nPol, |
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| 72 | Vector<Bool> &haveXPol, |
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| 73 | Bool &haveBase, |
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| 74 | Bool &haveSpectra) |
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| 75 | { |
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| 76 | // Check that MS is readable. |
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| 77 | if (!MS::isReadable(msName)) { |
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| 78 | return 1; |
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| 79 | } |
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| 80 | |
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| 81 | if (cMSopen) { |
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| 82 | close(); |
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| 83 | } |
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| 84 | |
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| 85 | cPKSMS = MeasurementSet(msName); |
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| 86 | cIdx = 0; |
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| 87 | cNRow = cPKSMS.nrow(); |
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| 88 | cMSopen = True; |
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| 89 | |
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| 90 | // Lock the table for read access. |
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| 91 | cPKSMS.lock(False); |
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| 92 | |
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| 93 | // Main MS table and subtable column access. |
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| 94 | ROMSMainColumns msCols(cPKSMS); |
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| 95 | ROMSDataDescColumns dataDescCols(cPKSMS.dataDescription()); |
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| 96 | ROMSFeedColumns feedCols(cPKSMS.feed()); |
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| 97 | ROMSFieldColumns fieldCols(cPKSMS.field()); |
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| 98 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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| 99 | ROMSPolarizationColumns polarizationCols(cPKSMS.polarization()); |
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| 100 | ROMSSourceColumns sourceCols(cPKSMS.source()); |
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| 101 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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| 102 | ROMSStateColumns stateCols(cPKSMS.state()); |
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| 103 | ROMSSysCalColumns sysCalCols(cPKSMS.sysCal()); |
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| 104 | ROMSWeatherColumns weatherCols(cPKSMS.weather()); |
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| 105 | |
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| 106 | // Column accessors for required columns. |
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| 107 | cScanNoCol.reference(msCols.scanNumber()); |
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| 108 | cTimeCol.reference(msCols.time()); |
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| 109 | cIntervalCol.reference(msCols.interval()); |
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| 110 | |
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| 111 | cFieldIdCol.reference(msCols.fieldId()); |
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| 112 | cFieldNameCol.reference(fieldCols.name()); |
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| 113 | |
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| 114 | cSrcIdCol.reference(fieldCols.sourceId()); |
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| 115 | cSrcNameCol.reference(sourceCols.name()); |
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| 116 | cSrcDirCol.reference(sourceCols.direction()); |
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| 117 | cSrcPMCol.reference(sourceCols.properMotion()); |
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| 118 | cSrcRestFrqCol.reference(sourceCols.restFrequency()); |
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| 119 | |
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| 120 | cStateIdCol.reference(msCols.stateId()); |
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| 121 | cObsModeCol.reference(stateCols.obsMode()); |
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| 122 | |
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| 123 | cDataDescIdCol.reference(msCols.dataDescId()); |
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| 124 | cChanFreqCol.reference(spWinCols.chanFreq()); |
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| 125 | |
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| 126 | cWeatherTimeCol.reference(weatherCols.time()); |
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| 127 | cTemperatureCol.reference(weatherCols.temperature()); |
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| 128 | cPressureCol.reference(weatherCols.pressure()); |
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| 129 | cHumidityCol.reference(weatherCols.relHumidity()); |
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| 130 | |
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| 131 | cBeamNoCol.reference(msCols.feed1()); |
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| 132 | cPointingCol.reference(pointingCols.direction()); |
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| 133 | cSigmaCol.reference(msCols.sigma()); |
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| 134 | cNumReceptorCol.reference(feedCols.numReceptors()); |
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| 135 | |
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| 136 | // Optional columns. |
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| 137 | if ((cHaveSrcVel = cPKSMS.source().tableDesc().isColumn("SYSVEL"))) { |
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| 138 | cSrcVelCol.attach(cPKSMS.source(), "SYSVEL"); |
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| 139 | } |
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| 140 | |
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| 141 | if ((cHaveTsys = cPKSMS.sysCal().tableDesc().isColumn("TSYS"))) { |
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| 142 | cTsysCol.attach(cPKSMS.sysCal(), "TSYS"); |
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| 143 | } |
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| 144 | |
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| 145 | if ((cHaveCalFctr = cPKSMS.tableDesc().isColumn("CALFCTR"))) { |
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| 146 | cCalFctrCol.attach(cPKSMS, "CALFCTR"); |
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| 147 | } |
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| 148 | |
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| 149 | if ((cHaveBaseLin = cPKSMS.tableDesc().isColumn("BASELIN"))) { |
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| 150 | cBaseLinCol.attach(cPKSMS, "BASELIN"); |
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| 151 | cBaseSubCol.attach(cPKSMS, "BASESUB"); |
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| 152 | } |
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| 153 | |
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| 154 | // Spectral data should always be present. |
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| 155 | haveSpectra = True; |
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| 156 | cFloatDataCol.reference(msCols.floatData()); |
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| 157 | cFlagCol.reference(msCols.flag()); |
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| 158 | |
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| 159 | if ((cGetXPol = cPKSMS.isColumn(MSMainEnums::DATA))) { |
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| 160 | if ((cHaveXCalFctr = cPKSMS.tableDesc().isColumn("XCALFCTR"))) { |
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| 161 | cXCalFctrCol.attach(cPKSMS, "XCALFCTR"); |
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| 162 | } |
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| 163 | |
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| 164 | cDataCol.reference(msCols.data()); |
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| 165 | } |
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| 166 | |
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| 167 | // Find which beams are present in the data. |
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| 168 | Vector<Int> beamNos = cBeamNoCol.getColumn(); |
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| 169 | Int maxBeamNo = max(beamNos) + 1; |
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| 170 | beams.resize(maxBeamNo); |
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| 171 | |
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| 172 | beams = False; |
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| 173 | for (uInt irow = 0; irow < beamNos.nelements(); irow++) { |
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| 174 | beams(beamNos(irow)) = True; |
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| 175 | } |
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| 176 | |
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| 177 | |
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| 178 | // Number of IFs. |
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| 179 | uInt nIF = dataDescCols.nrow(); |
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| 180 | IFs.resize(nIF); |
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| 181 | IFs = True; |
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| 182 | |
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| 183 | // Number of polarizations and channels in each IF. |
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| 184 | ROScalarColumn<Int> spWinIdCol(dataDescCols.spectralWindowId()); |
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| 185 | ROScalarColumn<Int> numChanCol(spWinCols.numChan()); |
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| 186 | |
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| 187 | ROScalarColumn<Int> polIdCol(dataDescCols.polarizationId()); |
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| 188 | ROScalarColumn<Int> numPolCol(polarizationCols.numCorr()); |
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| 189 | |
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| 190 | nChan.resize(nIF); |
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| 191 | nPol.resize(nIF); |
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| 192 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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| 193 | nChan(iIF) = numChanCol(spWinIdCol(iIF)); |
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| 194 | nPol(iIF) = numPolCol(polIdCol(iIF)); |
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| 195 | } |
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| 196 | |
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| 197 | // Cross-polarization data present? |
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| 198 | haveXPol.resize(nIF); |
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| 199 | haveXPol = False; |
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| 200 | |
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| 201 | if (cGetXPol) { |
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| 202 | for (Int irow = 0; irow < cNRow; irow++) { |
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| 203 | if (cDataCol.isDefined(irow)) { |
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| 204 | Int iIF = cDataDescIdCol(irow); |
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| 205 | haveXPol(iIF) = True; |
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| 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | |
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| 210 | |
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| 211 | // Initialize member data. |
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| 212 | cBeams.assign(beams); |
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| 213 | cIFs.assign(IFs); |
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| 214 | cNChan.assign(nChan); |
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| 215 | cNPol.assign(nPol); |
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| 216 | cHaveXPol.assign(haveXPol); |
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| 217 | |
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| 218 | |
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| 219 | // Default channel range selection. |
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| 220 | cStartChan.resize(nIF); |
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| 221 | cEndChan.resize(nIF); |
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| 222 | cRefChan.resize(nIF); |
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| 223 | |
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| 224 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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| 225 | cStartChan(iIF) = 1; |
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| 226 | cEndChan(iIF) = cNChan(iIF); |
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| 227 | cRefChan(iIF) = cNChan(iIF)/2 + 1; |
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| 228 | } |
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| 229 | |
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| 230 | Slice all; |
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| 231 | cDataSel.resize(nIF); |
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| 232 | cDataSel = Slicer(all, all); |
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| 233 | |
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| 234 | cScanNo = 0; |
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| 235 | cCycleNo = 1; |
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| 236 | cTime = cTimeCol(0); |
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| 237 | |
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| 238 | return 0; |
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| 239 | } |
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| 240 | |
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| 241 | //---------------------------------------------------- PKSMS2reader::getHeader |
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| 242 | |
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| 243 | // Get parameters describing the data. |
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| 244 | |
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| 245 | Int PKSMS2reader::getHeader( |
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| 246 | String &observer, |
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| 247 | String &project, |
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| 248 | String &antName, |
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| 249 | Vector<Double> &antPosition, |
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| 250 | String &obsMode, |
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| 251 | Float &equinox, |
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| 252 | String &dopplerFrame, |
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| 253 | Double &mjd, |
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| 254 | Double &refFreq, |
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| 255 | Double &bandwidth) |
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| 256 | { |
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| 257 | if (!cMSopen) { |
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| 258 | return 1; |
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| 259 | } |
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| 260 | |
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| 261 | // Observer and project. |
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| 262 | ROMSObservationColumns observationCols(cPKSMS.observation()); |
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| 263 | observer = observationCols.observer()(0); |
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| 264 | project = observationCols.project()(0); |
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| 265 | |
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| 266 | // Antenna name and ITRF coordinates. |
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| 267 | ROMSAntennaColumns antennaCols(cPKSMS.antenna()); |
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| 268 | antName = antennaCols.name()(0); |
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| 269 | antPosition = antennaCols.position()(0); |
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| 270 | |
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| 271 | // Observation type. |
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| 272 | if (cObsModeCol.nrow()) { |
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| 273 | obsMode = cObsModeCol(0); |
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| 274 | if (obsMode == "\0") obsMode = "RF"; |
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| 275 | } else { |
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| 276 | obsMode = "RF"; |
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| 277 | } |
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| 278 | |
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| 279 | |
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| 280 | // Coordinate equinox. |
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| 281 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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| 282 | String dirref = pointingCols.direction().keywordSet().asRecord("MEASINFO"). |
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| 283 | asString("Ref"); |
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| 284 | sscanf(dirref.chars()+1, "%f", &equinox); |
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| 285 | |
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| 286 | // Frequency/velocity reference frame. |
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| 287 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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| 288 | dopplerFrame = MFrequency::showType(spWinCols.measFreqRef()(0)); |
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| 289 | |
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| 290 | // Translate to FITS standard names. |
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| 291 | if (dopplerFrame == "TOPO") { |
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| 292 | dopplerFrame = "TOPOCENT"; |
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| 293 | } else if (dopplerFrame == "GEO") { |
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| 294 | dopplerFrame = "GEOCENTR"; |
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| 295 | } else if (dopplerFrame == "BARY") { |
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| 296 | dopplerFrame = "BARYCENT"; |
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| 297 | } else if (dopplerFrame == "GALACTO") { |
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| 298 | dopplerFrame = "GALACTOC"; |
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| 299 | } else if (dopplerFrame == "LGROUP") { |
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| 300 | dopplerFrame = "LOCALGRP"; |
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| 301 | } else if (dopplerFrame == "CMB") { |
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| 302 | dopplerFrame = "CMBDIPOL"; |
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| 303 | } else if (dopplerFrame == "REST") { |
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| 304 | dopplerFrame = "SOURCE"; |
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| 305 | } |
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| 306 | |
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| 307 | // MJD at start of observation. |
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| 308 | mjd = cTimeCol(0)/86400.0; |
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| 309 | |
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| 310 | // Reference frequency and bandwidth. |
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| 311 | refFreq = spWinCols.refFrequency()(0); |
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| 312 | bandwidth = spWinCols.totalBandwidth()(0); |
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| 313 | |
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| 314 | return 0; |
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| 315 | } |
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| 316 | |
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| 317 | //-------------------------------------------------- PKSMS2reader::getFreqInfo |
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| 318 | |
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| 319 | // Get frequency parameters for each IF. |
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| 320 | |
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| 321 | Int PKSMS2reader::getFreqInfo( |
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| 322 | Vector<Double> &startFreq, |
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| 323 | Vector<Double> &endFreq) |
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| 324 | { |
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| 325 | uInt nIF = cIFs.nelements(); |
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| 326 | startFreq.resize(nIF); |
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| 327 | endFreq.resize(nIF); |
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| 328 | |
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| 329 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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| 330 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
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| 331 | |
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| 332 | Int nChan = chanFreq.nelements(); |
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| 333 | startFreq(iIF) = chanFreq(0); |
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| 334 | endFreq(iIF) = chanFreq(nChan-1); |
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| 335 | } |
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| 336 | |
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| 337 | return 0; |
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| 338 | } |
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| 339 | |
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| 340 | //------------------------------------------------------- PKSMS2reader::select |
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| 341 | |
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| 342 | // Set data selection by beam number and channel. |
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| 343 | |
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| 344 | uInt PKSMS2reader::select( |
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| 345 | const Vector<Bool> beamSel, |
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| 346 | const Vector<Bool> IFsel, |
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| 347 | const Vector<Int> startChan, |
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| 348 | const Vector<Int> endChan, |
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| 349 | const Vector<Int> refChan, |
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| 350 | const Bool getSpectra, |
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| 351 | const Bool getXPol, |
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| 352 | const Bool getFeedPos) |
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| 353 | { |
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| 354 | if (!cMSopen) { |
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| 355 | return 1; |
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| 356 | } |
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| 357 | |
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| 358 | // Beam selection. |
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| 359 | uInt nBeam = cBeams.nelements(); |
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| 360 | uInt nBeamSel = beamSel.nelements(); |
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| 361 | for (uInt ibeam = 0; ibeam < nBeam; ibeam++) { |
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| 362 | if (ibeam < nBeamSel) { |
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| 363 | cBeams(ibeam) = beamSel(ibeam); |
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| 364 | } else { |
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| 365 | cBeams(ibeam) = False; |
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| 366 | } |
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| 367 | } |
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| 368 | |
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| 369 | uInt nIF = cIFs.nelements(); |
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| 370 | uInt maxNChan = 0; |
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| 371 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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| 372 | // IF selection. |
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| 373 | if (iIF < IFsel.nelements()) { |
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| 374 | cIFs(iIF) = IFsel(iIF); |
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| 375 | } else { |
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| 376 | cIFs(iIF) = False; |
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| 377 | } |
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| 378 | |
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| 379 | if (!cIFs(iIF)) continue; |
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| 380 | |
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| 381 | |
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| 382 | // Channel selection. |
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| 383 | if (iIF < startChan.nelements()) { |
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| 384 | cStartChan(iIF) = startChan(iIF); |
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| 385 | |
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| 386 | if (cStartChan(iIF) <= 0) { |
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| 387 | cStartChan(iIF) += cNChan(iIF); |
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| 388 | } else if (cStartChan(iIF) > Int(cNChan(iIF))) { |
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| 389 | cStartChan(iIF) = cNChan(iIF); |
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| 390 | } |
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| 391 | } |
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| 392 | |
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| 393 | if (iIF < endChan.nelements()) { |
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| 394 | cEndChan(iIF) = endChan(iIF); |
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| 395 | |
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| 396 | if (cEndChan(iIF) <= 0) { |
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| 397 | cEndChan(iIF) += cNChan(iIF); |
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| 398 | } else if (cEndChan(iIF) > Int(cNChan(iIF))) { |
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| 399 | cEndChan(iIF) = cNChan(iIF); |
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| 400 | } |
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| 401 | } |
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| 402 | |
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| 403 | if (iIF < refChan.nelements()) { |
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| 404 | cRefChan(iIF) = refChan(iIF); |
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| 405 | } else { |
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| 406 | cRefChan(iIF) = cStartChan(iIF); |
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| 407 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
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| 408 | cRefChan(iIF) += (cEndChan(iIF) - cStartChan(iIF) + 1)/2; |
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| 409 | } else { |
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| 410 | cRefChan(iIF) -= (cStartChan(iIF) - cEndChan(iIF) + 1)/2; |
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| 411 | } |
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| 412 | } |
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| 413 | |
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| 414 | uInt nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
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| 415 | if (maxNChan < nChan) { |
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| 416 | maxNChan = nChan; |
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| 417 | } |
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| 418 | |
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| 419 | // Inverted Slices are not allowed. |
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| 420 | Slice outPols; |
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| 421 | Slice outChans(min(cStartChan(iIF),cEndChan(iIF))-1, nChan); |
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| 422 | cDataSel(iIF) = Slicer(outPols, outChans); |
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| 423 | } |
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| 424 | |
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| 425 | // Get spectral data? |
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| 426 | cGetSpectra = getSpectra; |
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| 427 | |
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| 428 | // Get cross-polarization data? |
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| 429 | cGetXPol = cGetXPol && getXPol; |
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| 430 | |
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| 431 | // Get feed positions? (Not available.) |
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| 432 | cGetFeedPos = False; |
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| 433 | |
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| 434 | return maxNChan; |
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| 435 | } |
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| 436 | |
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| 437 | //---------------------------------------------------- PKSMS2reader::findRange |
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| 438 | |
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| 439 | // Find the range of the data in time and position. |
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| 440 | |
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| 441 | Int PKSMS2reader::findRange( |
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| 442 | Int &nRow, |
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| 443 | Int &nSel, |
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| 444 | Vector<Double> &timeSpan, |
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| 445 | Matrix<Double> &positions) |
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| 446 | { |
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| 447 | if (!cMSopen) { |
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| 448 | return 1; |
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| 449 | } |
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| 450 | |
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| 451 | nRow = cNRow; |
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| 452 | |
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| 453 | // Find the number of rows selected. |
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| 454 | nSel = 0; |
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| 455 | Vector<Bool> sel(nRow); |
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| 456 | for (Int irow = 0; irow < nRow; irow++) { |
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| 457 | if ((sel(irow) = cBeams(cBeamNoCol(irow)) && |
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| 458 | cIFs(cDataDescIdCol(irow)))) { |
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| 459 | nSel++; |
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| 460 | } |
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| 461 | } |
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| 462 | |
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| 463 | // Find the time range (s). |
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| 464 | timeSpan.resize(2); |
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| 465 | timeSpan(0) = cTimeCol(0); |
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| 466 | timeSpan(1) = cTimeCol(nRow-1); |
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| 467 | |
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| 468 | // Retrieve positions for selected data. |
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| 469 | Int isel = 0; |
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| 470 | positions.resize(2,nSel); |
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| 471 | for (Int irow = 0; irow < nRow; irow++) { |
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| 472 | if (sel(irow)) { |
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| 473 | Matrix<Double> pointingDir = cPointingCol(cFieldIdCol(irow)); |
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| 474 | positions.column(isel++) = pointingDir.column(0); |
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| 475 | } |
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| 476 | } |
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| 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 | } |
---|