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 | //# livedata - processing pipeline for single-dish, multibeam spectral data. |
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5 | //# Copyright (C) 2000-2009, Australia Telescope National Facility, CSIRO |
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6 | //# |
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7 | //# This file is part of livedata. |
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8 | //# |
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9 | //# livedata is free software: you can redistribute it and/or modify it under |
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10 | //# the terms of the GNU General Public License as published by the Free |
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11 | //# Software Foundation, either version 3 of the License, or (at your option) |
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12 | //# any later version. |
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13 | //# |
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14 | //# livedata is distributed in the hope that it will be useful, but WITHOUT |
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15 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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16 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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17 | //# more details. |
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18 | //# |
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19 | //# You should have received a copy of the GNU General Public License along |
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20 | //# with livedata. If not, see <http://www.gnu.org/licenses/>. |
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21 | //# |
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22 | //# Correspondence concerning livedata may be directed to: |
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23 | //# Internet email: mcalabre@atnf.csiro.au |
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24 | //# Postal address: Dr. Mark Calabretta |
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25 | //# Australia Telescope National Facility, CSIRO |
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26 | //# PO Box 76 |
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27 | //# Epping NSW 1710 |
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28 | //# AUSTRALIA |
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29 | //# |
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30 | //# http://www.atnf.csiro.au/computing/software/livedata.html |
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31 | //# $Id: PKSMS2reader.cc,v 19.23 2009-09-29 07:33:38 cal103 Exp $ |
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32 | //#--------------------------------------------------------------------------- |
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33 | //# Original: 2000/08/03, Mark Calabretta, ATNF |
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34 | //#--------------------------------------------------------------------------- |
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35 | |
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36 | #include <atnf/pks/pks_maths.h> |
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37 | #include <atnf/PKSIO/PKSmsg.h> |
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38 | #include <atnf/PKSIO/PKSrecord.h> |
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39 | #include <atnf/PKSIO/PKSMS2reader.h> |
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40 | |
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41 | #include <casa/stdio.h> |
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42 | #include <casa/Arrays/ArrayMath.h> |
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43 | #include <casa/Arrays/Slice.h> |
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44 | #include <ms/MeasurementSets/MSColumns.h> |
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45 | #include <tables/Tables.h> |
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46 | |
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47 | //------------------------------------------------- PKSMS2reader::PKSMS2reader |
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48 | |
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49 | // Default constructor. |
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50 | |
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51 | PKSMS2reader::PKSMS2reader() |
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52 | { |
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53 | cMSopen = False; |
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54 | |
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55 | // By default, messages are written to stderr. |
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56 | initMsg(); |
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57 | } |
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58 | |
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59 | //------------------------------------------------ PKSMS2reader::~PKSMS2reader |
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60 | |
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61 | PKSMS2reader::~PKSMS2reader() |
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62 | { |
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63 | close(); |
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64 | } |
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65 | |
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66 | //--------------------------------------------------------- PKSMS2reader::open |
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67 | |
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68 | // Open the MS for reading. |
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69 | |
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70 | Int PKSMS2reader::open( |
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71 | const String msName, |
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72 | Vector<Bool> &beams, |
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73 | Vector<Bool> &IFs, |
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74 | Vector<uInt> &nChan, |
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75 | Vector<uInt> &nPol, |
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76 | Vector<Bool> &haveXPol, |
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77 | Bool &haveBase, |
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78 | Bool &haveSpectra) |
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79 | { |
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80 | // Check that MS is readable. |
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81 | if (!MS::isReadable(msName)) { |
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82 | return 1; |
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83 | } |
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84 | |
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85 | if (cMSopen) { |
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86 | close(); |
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87 | } |
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88 | |
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89 | cPKSMS = MeasurementSet(msName); |
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90 | cIdx = 0; |
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91 | cNRow = cPKSMS.nrow(); |
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92 | cMSopen = True; |
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93 | |
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94 | // Lock the table for read access. |
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95 | cPKSMS.lock(False); |
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96 | |
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97 | // Main MS table and subtable column access. |
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98 | ROMSMainColumns msCols(cPKSMS); |
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99 | ROMSDataDescColumns dataDescCols(cPKSMS.dataDescription()); |
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100 | ROMSFeedColumns feedCols(cPKSMS.feed()); |
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101 | ROMSFieldColumns fieldCols(cPKSMS.field()); |
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102 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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103 | ROMSPolarizationColumns polarizationCols(cPKSMS.polarization()); |
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104 | ROMSSourceColumns sourceCols(cPKSMS.source()); |
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105 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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106 | ROMSStateColumns stateCols(cPKSMS.state()); |
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107 | ROMSSysCalColumns sysCalCols(cPKSMS.sysCal()); |
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108 | ROMSWeatherColumns weatherCols(cPKSMS.weather()); |
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109 | |
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110 | // Column accessors for required columns. |
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111 | cScanNoCol.reference(msCols.scanNumber()); |
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112 | cTimeCol.reference(msCols.time()); |
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113 | cIntervalCol.reference(msCols.interval()); |
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114 | |
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115 | cFieldIdCol.reference(msCols.fieldId()); |
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116 | cFieldNameCol.reference(fieldCols.name()); |
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117 | |
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118 | cSrcIdCol.reference(fieldCols.sourceId()); |
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119 | cSrcNameCol.reference(sourceCols.name()); |
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120 | cSrcDirCol.reference(sourceCols.direction()); |
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121 | cSrcPMCol.reference(sourceCols.properMotion()); |
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122 | cSrcRestFrqCol.reference(sourceCols.restFrequency()); |
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123 | |
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124 | cStateIdCol.reference(msCols.stateId()); |
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125 | cObsModeCol.reference(stateCols.obsMode()); |
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126 | |
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127 | cDataDescIdCol.reference(msCols.dataDescId()); |
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128 | cChanFreqCol.reference(spWinCols.chanFreq()); |
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129 | |
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130 | cWeatherTimeCol.reference(weatherCols.time()); |
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131 | cTemperatureCol.reference(weatherCols.temperature()); |
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132 | cPressureCol.reference(weatherCols.pressure()); |
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133 | cHumidityCol.reference(weatherCols.relHumidity()); |
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134 | |
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135 | cBeamNoCol.reference(msCols.feed1()); |
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136 | cPointingCol.reference(pointingCols.direction()); |
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137 | cSigmaCol.reference(msCols.sigma()); |
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138 | cNumReceptorCol.reference(feedCols.numReceptors()); |
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139 | |
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140 | // Optional columns. |
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141 | if ((cHaveSrcVel = cPKSMS.source().tableDesc().isColumn("SYSVEL"))) { |
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142 | cSrcVelCol.attach(cPKSMS.source(), "SYSVEL"); |
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143 | } |
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144 | |
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145 | if ((cHaveTsys = cPKSMS.sysCal().tableDesc().isColumn("TSYS"))) { |
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146 | cTsysCol.attach(cPKSMS.sysCal(), "TSYS"); |
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147 | } |
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148 | |
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149 | if ((cHaveCalFctr = cPKSMS.tableDesc().isColumn("CALFCTR"))) { |
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150 | cCalFctrCol.attach(cPKSMS, "CALFCTR"); |
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151 | } |
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152 | |
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153 | if ((cHaveBaseLin = cPKSMS.tableDesc().isColumn("BASELIN"))) { |
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154 | cBaseLinCol.attach(cPKSMS, "BASELIN"); |
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155 | cBaseSubCol.attach(cPKSMS, "BASESUB"); |
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156 | } |
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157 | |
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158 | // Spectral data should always be present. |
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159 | haveSpectra = True; |
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160 | cFloatDataCol.reference(msCols.floatData()); |
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161 | cFlagCol.reference(msCols.flag()); |
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162 | |
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163 | if ((cGetXPol = cPKSMS.isColumn(MSMainEnums::DATA))) { |
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164 | if ((cHaveXCalFctr = cPKSMS.tableDesc().isColumn("XCALFCTR"))) { |
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165 | cXCalFctrCol.attach(cPKSMS, "XCALFCTR"); |
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166 | } |
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167 | |
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168 | cDataCol.reference(msCols.data()); |
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169 | } |
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170 | |
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171 | // Find which beams are present in the data. |
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172 | Vector<Int> beamNos = cBeamNoCol.getColumn(); |
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173 | Int maxBeamNo = max(beamNos) + 1; |
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174 | beams.resize(maxBeamNo); |
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175 | |
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176 | beams = False; |
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177 | for (uInt irow = 0; irow < beamNos.nelements(); irow++) { |
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178 | beams(beamNos(irow)) = True; |
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179 | } |
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180 | |
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181 | |
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182 | // Number of IFs. |
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183 | uInt nIF = dataDescCols.nrow(); |
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184 | IFs.resize(nIF); |
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185 | IFs = True; |
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186 | |
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187 | // Number of polarizations and channels in each IF. |
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188 | ROScalarColumn<Int> spWinIdCol(dataDescCols.spectralWindowId()); |
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189 | ROScalarColumn<Int> numChanCol(spWinCols.numChan()); |
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190 | |
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191 | ROScalarColumn<Int> polIdCol(dataDescCols.polarizationId()); |
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192 | ROScalarColumn<Int> numPolCol(polarizationCols.numCorr()); |
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193 | |
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194 | nChan.resize(nIF); |
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195 | nPol.resize(nIF); |
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196 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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197 | nChan(iIF) = numChanCol(spWinIdCol(iIF)); |
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198 | nPol(iIF) = numPolCol(polIdCol(iIF)); |
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199 | } |
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200 | |
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201 | // Cross-polarization data present? |
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202 | haveXPol.resize(nIF); |
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203 | haveXPol = False; |
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204 | |
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205 | if (cGetXPol) { |
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206 | for (Int irow = 0; irow < cNRow; irow++) { |
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207 | if (cDataCol.isDefined(irow)) { |
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208 | Int iIF = cDataDescIdCol(irow); |
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209 | haveXPol(iIF) = True; |
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210 | } |
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211 | } |
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212 | } |
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213 | |
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214 | |
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215 | // Initialize member data. |
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216 | cBeams.assign(beams); |
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217 | cIFs.assign(IFs); |
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218 | cNChan.assign(nChan); |
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219 | cNPol.assign(nPol); |
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220 | cHaveXPol.assign(haveXPol); |
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221 | |
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222 | |
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223 | // Default channel range selection. |
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224 | cStartChan.resize(nIF); |
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225 | cEndChan.resize(nIF); |
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226 | cRefChan.resize(nIF); |
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227 | |
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228 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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229 | cStartChan(iIF) = 1; |
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230 | cEndChan(iIF) = cNChan(iIF); |
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231 | cRefChan(iIF) = cNChan(iIF)/2 + 1; |
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232 | } |
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233 | |
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234 | Slice all; |
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235 | cDataSel.resize(nIF); |
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236 | cDataSel = Slicer(all, all); |
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237 | |
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238 | cScanNo = 0; |
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239 | cCycleNo = 1; |
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240 | cTime = cTimeCol(0); |
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241 | |
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242 | return 0; |
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243 | } |
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244 | |
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245 | //---------------------------------------------------- PKSMS2reader::getHeader |
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246 | |
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247 | // Get parameters describing the data. |
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248 | |
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249 | Int PKSMS2reader::getHeader( |
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250 | String &observer, |
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251 | String &project, |
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252 | String &antName, |
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253 | Vector<Double> &antPosition, |
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254 | String &obsType, |
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255 | String &bunit, |
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256 | Float &equinox, |
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257 | String &dopplerFrame, |
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258 | Double &mjd, |
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259 | Double &refFreq, |
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260 | Double &bandwidth) |
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261 | { |
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262 | if (!cMSopen) { |
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263 | return 1; |
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264 | } |
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265 | |
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266 | // Observer and project. |
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267 | ROMSObservationColumns observationCols(cPKSMS.observation()); |
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268 | observer = observationCols.observer()(0); |
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269 | project = observationCols.project()(0); |
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270 | |
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271 | // Antenna name and ITRF coordinates. |
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272 | ROMSAntennaColumns antennaCols(cPKSMS.antenna()); |
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273 | antName = antennaCols.name()(0); |
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274 | antPosition = antennaCols.position()(0); |
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275 | |
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276 | // Observation type. |
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277 | if (cObsModeCol.nrow()) { |
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278 | obsType = cObsModeCol(0); |
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279 | if (obsType == "\0") obsType = "RF"; |
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280 | } else { |
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281 | obsType = "RF"; |
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282 | } |
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283 | |
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284 | // Brightness units. |
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285 | bunit = cPKSMS.unit(MSMainEnums::FLOAT_DATA); |
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286 | |
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287 | // Coordinate equinox. |
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288 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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289 | String dirref = pointingCols.direction().keywordSet().asRecord("MEASINFO"). |
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290 | asString("Ref"); |
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291 | sscanf(dirref.chars()+1, "%f", &equinox); |
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292 | |
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293 | // Frequency/velocity reference frame. |
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294 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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295 | dopplerFrame = MFrequency::showType(spWinCols.measFreqRef()(0)); |
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296 | |
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297 | // Translate to FITS standard names. |
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298 | if (dopplerFrame == "TOPO") { |
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299 | dopplerFrame = "TOPOCENT"; |
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300 | } else if (dopplerFrame == "GEO") { |
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301 | dopplerFrame = "GEOCENTR"; |
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302 | } else if (dopplerFrame == "BARY") { |
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303 | dopplerFrame = "BARYCENT"; |
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304 | } else if (dopplerFrame == "GALACTO") { |
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305 | dopplerFrame = "GALACTOC"; |
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306 | } else if (dopplerFrame == "LGROUP") { |
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307 | dopplerFrame = "LOCALGRP"; |
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308 | } else if (dopplerFrame == "CMB") { |
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309 | dopplerFrame = "CMBDIPOL"; |
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310 | } else if (dopplerFrame == "REST") { |
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311 | dopplerFrame = "SOURCE"; |
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312 | } |
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313 | |
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314 | // MJD at start of observation. |
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315 | mjd = cTimeCol(0)/86400.0; |
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316 | |
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317 | // Reference frequency and bandwidth. |
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318 | refFreq = spWinCols.refFrequency()(0); |
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319 | bandwidth = spWinCols.totalBandwidth()(0); |
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320 | |
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321 | return 0; |
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322 | } |
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323 | |
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324 | //-------------------------------------------------- PKSMS2reader::getFreqInfo |
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325 | |
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326 | // Get frequency parameters for each IF. |
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327 | |
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328 | Int PKSMS2reader::getFreqInfo( |
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329 | Vector<Double> &startFreq, |
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330 | Vector<Double> &endFreq) |
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331 | { |
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332 | uInt nIF = cIFs.nelements(); |
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333 | startFreq.resize(nIF); |
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334 | endFreq.resize(nIF); |
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335 | |
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336 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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337 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
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338 | |
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339 | Int nChan = chanFreq.nelements(); |
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340 | startFreq(iIF) = chanFreq(0); |
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341 | endFreq(iIF) = chanFreq(nChan-1); |
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342 | } |
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343 | |
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344 | return 0; |
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345 | } |
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346 | |
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347 | //------------------------------------------------------- PKSMS2reader::select |
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348 | |
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349 | // Set data selection by beam number and channel. |
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350 | |
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351 | uInt PKSMS2reader::select( |
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352 | const Vector<Bool> beamSel, |
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353 | const Vector<Bool> IFsel, |
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354 | const Vector<Int> startChan, |
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355 | const Vector<Int> endChan, |
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356 | const Vector<Int> refChan, |
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357 | const Bool getSpectra, |
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358 | const Bool getXPol, |
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359 | const Int coordSys) |
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360 | { |
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361 | if (!cMSopen) { |
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362 | return 1; |
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363 | } |
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364 | |
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365 | // Beam selection. |
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366 | uInt nBeam = cBeams.nelements(); |
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367 | uInt nBeamSel = beamSel.nelements(); |
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368 | for (uInt ibeam = 0; ibeam < nBeam; ibeam++) { |
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369 | if (ibeam < nBeamSel) { |
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370 | cBeams(ibeam) = beamSel(ibeam); |
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371 | } else { |
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372 | cBeams(ibeam) = False; |
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373 | } |
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374 | } |
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375 | |
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376 | uInt nIF = cIFs.nelements(); |
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377 | uInt maxNChan = 0; |
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378 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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379 | // IF selection. |
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380 | if (iIF < IFsel.nelements()) { |
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381 | cIFs(iIF) = IFsel(iIF); |
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382 | } else { |
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383 | cIFs(iIF) = False; |
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384 | } |
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385 | |
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386 | if (!cIFs(iIF)) continue; |
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387 | |
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388 | |
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389 | // Channel selection. |
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390 | if (iIF < startChan.nelements()) { |
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391 | cStartChan(iIF) = startChan(iIF); |
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392 | |
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393 | if (cStartChan(iIF) <= 0) { |
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394 | cStartChan(iIF) += cNChan(iIF); |
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395 | } else if (cStartChan(iIF) > Int(cNChan(iIF))) { |
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396 | cStartChan(iIF) = cNChan(iIF); |
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397 | } |
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398 | } |
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399 | |
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400 | if (iIF < endChan.nelements()) { |
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401 | cEndChan(iIF) = endChan(iIF); |
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402 | |
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403 | if (cEndChan(iIF) <= 0) { |
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404 | cEndChan(iIF) += cNChan(iIF); |
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405 | } else if (cEndChan(iIF) > Int(cNChan(iIF))) { |
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406 | cEndChan(iIF) = cNChan(iIF); |
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407 | } |
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408 | } |
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409 | |
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410 | if (iIF < refChan.nelements()) { |
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411 | cRefChan(iIF) = refChan(iIF); |
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412 | } else { |
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413 | cRefChan(iIF) = cStartChan(iIF); |
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414 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
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415 | cRefChan(iIF) += (cEndChan(iIF) - cStartChan(iIF) + 1)/2; |
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416 | } else { |
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417 | cRefChan(iIF) -= (cStartChan(iIF) - cEndChan(iIF) + 1)/2; |
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418 | } |
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419 | } |
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420 | |
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421 | uInt nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
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422 | if (maxNChan < nChan) { |
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423 | maxNChan = nChan; |
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424 | } |
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425 | |
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426 | // Inverted Slices are not allowed. |
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427 | Slice outPols; |
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428 | Slice outChans(min(cStartChan(iIF),cEndChan(iIF))-1, nChan); |
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429 | cDataSel(iIF) = Slicer(outPols, outChans); |
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430 | } |
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431 | |
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432 | // Get spectral data? |
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433 | cGetSpectra = getSpectra; |
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434 | |
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435 | // Get cross-polarization data? |
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436 | cGetXPol = cGetXPol && getXPol; |
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437 | |
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438 | // Coordinate system? (Only equatorial available.) |
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439 | cCoordSys = 0; |
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440 | |
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441 | return maxNChan; |
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442 | } |
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443 | |
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444 | //---------------------------------------------------- PKSMS2reader::findRange |
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445 | |
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446 | // Find the range of the data in time and position. |
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447 | |
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448 | Int PKSMS2reader::findRange( |
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449 | Int &nRow, |
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450 | Int &nSel, |
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451 | Vector<Double> &timeSpan, |
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452 | Matrix<Double> &positions) |
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453 | { |
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454 | if (!cMSopen) { |
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455 | return 1; |
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456 | } |
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457 | |
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458 | nRow = cNRow; |
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459 | |
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460 | // Find the number of rows selected. |
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461 | nSel = 0; |
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462 | Vector<Bool> sel(nRow); |
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463 | for (Int irow = 0; irow < nRow; irow++) { |
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464 | if ((sel(irow) = cBeams(cBeamNoCol(irow)) && |
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465 | cIFs(cDataDescIdCol(irow)))) { |
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466 | nSel++; |
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467 | } |
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468 | } |
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469 | |
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470 | // Find the time range (s). |
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471 | timeSpan.resize(2); |
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472 | timeSpan(0) = cTimeCol(0); |
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473 | timeSpan(1) = cTimeCol(nRow-1); |
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474 | |
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475 | // Retrieve positions for selected data. |
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476 | Int isel = 0; |
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477 | positions.resize(2,nSel); |
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478 | for (Int irow = 0; irow < nRow; irow++) { |
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479 | if (sel(irow)) { |
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480 | Matrix<Double> pointingDir = cPointingCol(cFieldIdCol(irow)); |
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481 | positions.column(isel++) = pointingDir.column(0); |
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482 | } |
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483 | } |
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484 | |
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485 | return 0; |
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486 | } |
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487 | |
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488 | //--------------------------------------------------------- PKSMS2reader::read |
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489 | |
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490 | // Read the next data record. |
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491 | |
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492 | Int PKSMS2reader::read(PKSrecord &pksrec) |
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493 | { |
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494 | if (!cMSopen) { |
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495 | return 1; |
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496 | } |
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497 | |
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498 | // Check for EOF. |
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499 | if (cIdx >= cNRow) { |
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500 | return -1; |
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501 | } |
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502 | |
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503 | // Find the next selected beam and IF. |
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504 | Int ibeam; |
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505 | Int iIF; |
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506 | while (True) { |
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507 | ibeam = cBeamNoCol(cIdx); |
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508 | iIF = cDataDescIdCol(cIdx); |
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509 | if (cBeams(ibeam) && cIFs(iIF)) { |
---|
510 | break; |
---|
511 | } |
---|
512 | |
---|
513 | // Check for EOF. |
---|
514 | if (++cIdx >= cNRow) { |
---|
515 | return -1; |
---|
516 | } |
---|
517 | } |
---|
518 | |
---|
519 | // Renumerate scan no. Here still is 1-based |
---|
520 | pksrec.scanNo = cScanNoCol(cIdx) - cScanNoCol(0) + 1; |
---|
521 | |
---|
522 | if (pksrec.scanNo != cScanNo) { |
---|
523 | // Start of new scan. |
---|
524 | cScanNo = pksrec.scanNo; |
---|
525 | cCycleNo = 1; |
---|
526 | cTime = cTimeCol(cIdx); |
---|
527 | } |
---|
528 | |
---|
529 | Double time = cTimeCol(cIdx); |
---|
530 | pksrec.mjd = time/86400.0; |
---|
531 | pksrec.interval = cIntervalCol(cIdx); |
---|
532 | |
---|
533 | // Reconstruct the integration cycle number; due to small latencies the |
---|
534 | // integration time is usually slightly less than the time between cycles, |
---|
535 | // resetting cTime will prevent the difference from accumulating. |
---|
536 | cCycleNo += nint((time - cTime)/pksrec.interval); |
---|
537 | pksrec.cycleNo = cCycleNo; |
---|
538 | cTime = time; |
---|
539 | |
---|
540 | Int fieldId = cFieldIdCol(cIdx); |
---|
541 | pksrec.fieldName = cFieldNameCol(fieldId); |
---|
542 | |
---|
543 | Int srcId = cSrcIdCol(fieldId); |
---|
544 | pksrec.srcName = cSrcNameCol(srcId); |
---|
545 | pksrec.srcDir = cSrcDirCol(srcId); |
---|
546 | pksrec.srcPM = cSrcPMCol(srcId); |
---|
547 | |
---|
548 | // Systemic velocity. |
---|
549 | if (!cHaveSrcVel) { |
---|
550 | pksrec.srcVel = 0.0f; |
---|
551 | } else { |
---|
552 | pksrec.srcVel = cSrcVelCol(srcId)(IPosition(1,0)); |
---|
553 | } |
---|
554 | |
---|
555 | // Observation type. |
---|
556 | Int stateId = cStateIdCol(cIdx); |
---|
557 | pksrec.obsType = cObsModeCol(stateId); |
---|
558 | |
---|
559 | pksrec.IFno = iIF + 1; |
---|
560 | Int nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
---|
561 | |
---|
562 | // Minimal handling on continuum data. |
---|
563 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
---|
564 | if (nChan == 1) { |
---|
565 | cout << "The input is continuum data. "<< endl; |
---|
566 | pksrec.freqInc = chanFreq(0); |
---|
567 | pksrec.refFreq = chanFreq(0); |
---|
568 | pksrec.restFreq = 0.0f; |
---|
569 | } else { |
---|
570 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
---|
571 | pksrec.freqInc = chanFreq(1) - chanFreq(0); |
---|
572 | } else { |
---|
573 | pksrec.freqInc = chanFreq(0) - chanFreq(1); |
---|
574 | } |
---|
575 | |
---|
576 | pksrec.refFreq = chanFreq(cRefChan(iIF)-1); |
---|
577 | pksrec.restFreq = cSrcRestFrqCol(srcId)(IPosition(1,0)); |
---|
578 | } |
---|
579 | pksrec.bandwidth = abs(pksrec.freqInc * nChan); |
---|
580 | |
---|
581 | pksrec.tcal.resize(cNPol(iIF)); |
---|
582 | pksrec.tcal = 0.0f; |
---|
583 | pksrec.tcalTime = ""; |
---|
584 | pksrec.azimuth = 0.0f; |
---|
585 | pksrec.elevation = 0.0f; |
---|
586 | pksrec.parAngle = 0.0f; |
---|
587 | |
---|
588 | pksrec.focusAxi = 0.0f; |
---|
589 | pksrec.focusTan = 0.0f; |
---|
590 | pksrec.focusRot = 0.0f; |
---|
591 | |
---|
592 | // Find the appropriate entry in the WEATHER subtable. |
---|
593 | Vector<Double> wTimes = cWeatherTimeCol.getColumn(); |
---|
594 | Int weatherIdx; |
---|
595 | for (weatherIdx = wTimes.nelements()-1; weatherIdx >= 0; weatherIdx--) { |
---|
596 | if (cWeatherTimeCol(weatherIdx) <= time) { |
---|
597 | break; |
---|
598 | } |
---|
599 | } |
---|
600 | |
---|
601 | if (weatherIdx < 0) { |
---|
602 | // No appropriate WEATHER entry. |
---|
603 | pksrec.temperature = 0.0f; |
---|
604 | pksrec.pressure = 0.0f; |
---|
605 | pksrec.humidity = 0.0f; |
---|
606 | } else { |
---|
607 | pksrec.temperature = cTemperatureCol(weatherIdx); |
---|
608 | pksrec.pressure = cPressureCol(weatherIdx); |
---|
609 | pksrec.humidity = cHumidityCol(weatherIdx); |
---|
610 | } |
---|
611 | |
---|
612 | pksrec.windSpeed = 0.0f; |
---|
613 | pksrec.windAz = 0.0f; |
---|
614 | |
---|
615 | pksrec.refBeam = 0; |
---|
616 | pksrec.beamNo = ibeam + 1; |
---|
617 | |
---|
618 | Matrix<Double> pointingDir = cPointingCol(fieldId); |
---|
619 | pksrec.direction = pointingDir.column(0); |
---|
620 | pksrec.pCode = 0; |
---|
621 | pksrec.rateAge = 0.0f; |
---|
622 | uInt ncols = pointingDir.ncolumn(); |
---|
623 | if (ncols == 1) { |
---|
624 | pksrec.scanRate = 0.0f; |
---|
625 | } else { |
---|
626 | pksrec.scanRate(0) = pointingDir.column(1)(0); |
---|
627 | pksrec.scanRate(1) = pointingDir.column(1)(1); |
---|
628 | } |
---|
629 | pksrec.paRate = 0.0f; |
---|
630 | |
---|
631 | // Get Tsys assuming that entries in the SYSCAL table match the main table. |
---|
632 | if (cHaveTsys) { |
---|
633 | Int nTsysColRow = cTsysCol.nrow(); |
---|
634 | if (nTsysColRow != cNRow) { |
---|
635 | cHaveTsys=0; |
---|
636 | } |
---|
637 | } |
---|
638 | if (cHaveTsys) { |
---|
639 | cTsysCol.get(cIdx, pksrec.tsys, True); |
---|
640 | } else { |
---|
641 | Int numReceptor; |
---|
642 | cNumReceptorCol.get(0, numReceptor); |
---|
643 | pksrec.tsys.resize(numReceptor); |
---|
644 | pksrec.tsys = 1.0f; |
---|
645 | } |
---|
646 | cSigmaCol.get(cIdx, pksrec.sigma, True); |
---|
647 | |
---|
648 | // Calibration factors (if available). |
---|
649 | pksrec.calFctr.resize(cNPol(iIF)); |
---|
650 | if (cHaveCalFctr) { |
---|
651 | cCalFctrCol.get(cIdx, pksrec.calFctr); |
---|
652 | } else { |
---|
653 | pksrec.calFctr = 0.0f; |
---|
654 | } |
---|
655 | |
---|
656 | // Baseline parameters (if available). |
---|
657 | if (cHaveBaseLin) { |
---|
658 | pksrec.baseLin.resize(2,cNPol(iIF)); |
---|
659 | cBaseLinCol.get(cIdx, pksrec.baseLin); |
---|
660 | |
---|
661 | pksrec.baseSub.resize(24,cNPol(iIF)); |
---|
662 | cBaseSubCol.get(cIdx, pksrec.baseSub); |
---|
663 | |
---|
664 | } else { |
---|
665 | pksrec.baseLin.resize(0,0); |
---|
666 | pksrec.baseSub.resize(0,0); |
---|
667 | } |
---|
668 | |
---|
669 | |
---|
670 | // Get spectral data. |
---|
671 | if (cGetSpectra) { |
---|
672 | Matrix<Float> tmpData; |
---|
673 | Matrix<Bool> tmpFlag; |
---|
674 | cFloatDataCol.getSlice(cIdx, cDataSel(iIF), tmpData, True); |
---|
675 | cFlagCol.getSlice(cIdx, cDataSel(iIF), tmpFlag, True); |
---|
676 | |
---|
677 | // Transpose spectra. |
---|
678 | Int nPol = tmpData.nrow(); |
---|
679 | pksrec.spectra.resize(nChan, nPol); |
---|
680 | pksrec.flagged.resize(nChan, nPol); |
---|
681 | if (cEndChan(iIF) >= cStartChan(iIF)) { |
---|
682 | // Simple transposition. |
---|
683 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
684 | for (Int ichan = 0; ichan < nChan; ichan++) { |
---|
685 | pksrec.spectra(ichan,ipol) = tmpData(ipol,ichan); |
---|
686 | pksrec.flagged(ichan,ipol) = tmpFlag(ipol,ichan); |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | } else { |
---|
691 | // Transpose with inversion. |
---|
692 | Int jchan = nChan - 1; |
---|
693 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
694 | for (Int ichan = 0; ichan < nChan; ichan++, jchan--) { |
---|
695 | pksrec.spectra(ichan,ipol) = tmpData(ipol,jchan); |
---|
696 | pksrec.flagged(ichan,ipol) = tmpFlag(ipol,jchan); |
---|
697 | } |
---|
698 | } |
---|
699 | } |
---|
700 | } |
---|
701 | |
---|
702 | // Get cross-polarization data. |
---|
703 | if (cGetXPol) { |
---|
704 | if (cHaveXCalFctr) { |
---|
705 | cXCalFctrCol.get(cIdx, pksrec.xCalFctr); |
---|
706 | } else { |
---|
707 | pksrec.xCalFctr = Complex(0.0f, 0.0f); |
---|
708 | } |
---|
709 | |
---|
710 | cDataCol.get(cIdx, pksrec.xPol, True); |
---|
711 | |
---|
712 | if (cEndChan(iIF) < cStartChan(iIF)) { |
---|
713 | Complex ctmp; |
---|
714 | Int jchan = nChan - 1; |
---|
715 | for (Int ichan = 0; ichan < nChan/2; ichan++, jchan--) { |
---|
716 | ctmp = pksrec.xPol(ichan); |
---|
717 | pksrec.xPol(ichan) = pksrec.xPol(jchan); |
---|
718 | pksrec.xPol(jchan) = ctmp; |
---|
719 | } |
---|
720 | } |
---|
721 | } |
---|
722 | |
---|
723 | cIdx++; |
---|
724 | |
---|
725 | return 0; |
---|
726 | } |
---|
727 | |
---|
728 | //-------------------------------------------------------- PKSMS2reader::close |
---|
729 | |
---|
730 | // Close the MS. |
---|
731 | |
---|
732 | void PKSMS2reader::close() |
---|
733 | { |
---|
734 | cPKSMS = MeasurementSet(); |
---|
735 | cMSopen = False; |
---|
736 | } |
---|