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 | //# $Id$ |
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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 | #include <casa/Quanta/MVTime.h> |
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41 | #include <casa/Quanta/MVAngle.h> |
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42 | #include <casa/BasicMath/Math.h> |
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43 | #include <measures/Measures/MeasConvert.h> |
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44 | #include <measures/Measures/MEpoch.h> |
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45 | #include <measures/Measures/MeasRef.h> |
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46 | |
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47 | |
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48 | // Parkes includes. |
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49 | #include <atnf/pks/pks_maths.h> |
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50 | #include <atnf/PKSIO/PKSMS2reader.h> |
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51 | |
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52 | |
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53 | //------------------------------------------------- PKSMS2reader::PKSMS2reader |
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54 | |
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55 | // Default constructor. |
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56 | |
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57 | PKSMS2reader::PKSMS2reader() |
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58 | { |
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59 | cMSopen = False; |
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60 | } |
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61 | |
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62 | //------------------------------------------------ PKSMS2reader::~PKSMS2reader |
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63 | |
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64 | PKSMS2reader::~PKSMS2reader() |
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65 | { |
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66 | close(); |
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67 | } |
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68 | |
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69 | //--------------------------------------------------------- PKSMS2reader::open |
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70 | |
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71 | // Open the MS for reading. |
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72 | |
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73 | Int PKSMS2reader::open( |
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74 | const String msName, |
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75 | Vector<Bool> &beams, |
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76 | Vector<Bool> &IFs, |
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77 | Vector<uInt> &nChan, |
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78 | Vector<uInt> &nPol, |
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79 | Vector<Bool> &haveXPol, |
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80 | Bool &haveBase, |
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81 | Bool &haveSpectra) |
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82 | { |
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83 | // Check that MS is readable. |
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84 | if (!MS::isReadable(msName)) { |
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85 | return 1; |
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86 | } |
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87 | |
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88 | if (cMSopen) { |
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89 | close(); |
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90 | } |
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91 | |
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92 | cPKSMS = MeasurementSet(msName); |
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93 | // taql access to the syscal table |
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94 | String tmpcalName = msName; |
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95 | tmpcalName.append("/SYSCAL"); |
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96 | cSysCalTab = Table(tmpcalName); |
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97 | |
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98 | cIdx = 0; |
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99 | lastmjd = 0.0; |
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100 | cNRow = cPKSMS.nrow(); |
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101 | cMSopen = True; |
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102 | |
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103 | // Lock the table for read access. |
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104 | cPKSMS.lock(False); |
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105 | |
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106 | // Main MS table and subtable column access. |
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107 | ROMSMainColumns msCols(cPKSMS); |
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108 | ROMSDataDescColumns dataDescCols(cPKSMS.dataDescription()); |
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109 | ROMSFeedColumns feedCols(cPKSMS.feed()); |
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110 | ROMSFieldColumns fieldCols(cPKSMS.field()); |
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111 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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112 | ROMSPolarizationColumns polarizationCols(cPKSMS.polarization()); |
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113 | ROMSSourceColumns sourceCols(cPKSMS.source()); |
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114 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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115 | ROMSStateColumns stateCols(cPKSMS.state()); |
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116 | ROMSSysCalColumns sysCalCols(cPKSMS.sysCal()); |
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117 | ROMSWeatherColumns weatherCols(cPKSMS.weather()); |
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118 | |
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119 | // Column accessors for required columns. |
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120 | cScanNoCol.reference(msCols.scanNumber()); |
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121 | cTimeCol.reference(msCols.time()); |
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122 | cIntervalCol.reference(msCols.interval()); |
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123 | |
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124 | cFieldIdCol.reference(msCols.fieldId()); |
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125 | cFieldNameCol.reference(fieldCols.name()); |
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126 | cFieldDelayDirCol.reference(fieldCols.delayDir()); |
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127 | |
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128 | cSrcIdCol.reference(fieldCols.sourceId()); |
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129 | cSrcId2Col.reference(sourceCols.sourceId()); |
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130 | cSrcNameCol.reference(sourceCols.name()); |
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131 | cSrcDirCol.reference(sourceCols.direction()); |
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132 | cSrcPMCol.reference(sourceCols.properMotion()); |
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133 | cSrcRestFrqCol.reference(sourceCols.restFrequency()); |
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134 | |
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135 | cStateIdCol.reference(msCols.stateId()); |
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136 | cObsModeCol.reference(stateCols.obsMode()); |
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137 | cCalCol.reference(stateCols.cal()); |
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138 | cSigStateCol.reference(stateCols.sig()); |
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139 | cRefStateCol.reference(stateCols.ref()); |
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140 | cDataDescIdCol.reference(msCols.dataDescId()); |
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141 | cSpWinIdCol.reference(dataDescCols.spectralWindowId()); |
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142 | cChanFreqCol.reference(spWinCols.chanFreq()); |
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143 | |
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144 | cWeatherTimeCol.reference(weatherCols.time()); |
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145 | cTemperatureCol.reference(weatherCols.temperature()); |
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146 | cPressureCol.reference(weatherCols.pressure()); |
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147 | cHumidityCol.reference(weatherCols.relHumidity()); |
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148 | |
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149 | cBeamNoCol.reference(msCols.feed1()); |
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150 | cPointingCol.reference(pointingCols.direction()); |
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151 | cSigmaCol.reference(msCols.sigma()); |
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152 | cNumReceptorCol.reference(feedCols.numReceptors()); |
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153 | |
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154 | // Optional columns. |
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155 | if ((cHaveSrcVel = cPKSMS.source().tableDesc().isColumn("SYSVEL"))) { |
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156 | cSrcVelCol.attach(cPKSMS.source(), "SYSVEL"); |
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157 | } |
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158 | |
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159 | if ((cHaveTsys = cPKSMS.sysCal().tableDesc().isColumn("TSYS"))) { |
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160 | cTsysCol.attach(cPKSMS.sysCal(), "TSYS"); |
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161 | } |
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162 | |
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163 | if ((cHaveTcal = cPKSMS.sysCal().tableDesc().isColumn("TCAL"))) { |
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164 | cTcalCol.attach(cPKSMS.sysCal(), "TCAL"); |
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165 | } |
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166 | |
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167 | if ((cHaveCalFctr = cPKSMS.tableDesc().isColumn("CALFCTR"))) { |
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168 | cCalFctrCol.attach(cPKSMS, "CALFCTR"); |
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169 | } |
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170 | |
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171 | if ((cHaveBaseLin = cPKSMS.tableDesc().isColumn("BASELIN"))) { |
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172 | cBaseLinCol.attach(cPKSMS, "BASELIN"); |
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173 | cBaseSubCol.attach(cPKSMS, "BASESUB"); |
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174 | } |
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175 | |
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176 | // Spectral data should always be present. |
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177 | haveSpectra = True; |
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178 | cFloatDataCol.reference(msCols.floatData()); |
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179 | cFlagCol.reference(msCols.flag()); |
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180 | |
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181 | |
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182 | if ((cGetXPol = cPKSMS.isColumn(MSMainEnums::DATA))) { |
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183 | if ((cHaveXCalFctr = cPKSMS.tableDesc().isColumn("XCALFCTR"))) { |
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184 | cXCalFctrCol.attach(cPKSMS, "XCALFCTR"); |
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185 | } |
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186 | |
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187 | cDataCol.reference(msCols.data()); |
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188 | } |
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189 | |
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190 | // Find which beams are present in the data. |
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191 | Vector<Int> beamNos = cBeamNoCol.getColumn(); |
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192 | Int maxBeamNo = max(beamNos) + 1; |
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193 | beams.resize(maxBeamNo); |
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194 | |
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195 | beams = False; |
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196 | for (uInt irow = 0; irow < beamNos.nelements(); irow++) { |
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197 | beams(beamNos(irow)) = True; |
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198 | } |
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199 | |
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200 | |
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201 | // Number of IFs. |
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202 | //uInt nIF = dataDescCols.nrow(); |
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203 | uInt nIF =spWinCols.nrow(); |
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204 | IFs.resize(nIF); |
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205 | IFs = True; |
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206 | |
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207 | // Number of polarizations and channels in each IF. |
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208 | ROScalarColumn<Int> spWinIdCol(dataDescCols.spectralWindowId()); |
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209 | ROScalarColumn<Int> numChanCol(spWinCols.numChan()); |
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210 | |
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211 | ROScalarColumn<Int> polIdCol(dataDescCols.polarizationId()); |
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212 | ROScalarColumn<Int> numPolCol(polarizationCols.numCorr()); |
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213 | |
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214 | nChan.resize(nIF); |
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215 | nPol.resize(nIF); |
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216 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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217 | nChan(iIF) = numChanCol(spWinIdCol(iIF)); |
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218 | nPol(iIF) = numPolCol(polIdCol(iIF)); |
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219 | } |
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220 | |
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221 | // Cross-polarization data present? |
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222 | haveXPol.resize(nIF); |
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223 | haveXPol = False; |
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224 | |
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225 | if (cGetXPol) { |
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226 | for (Int irow = 0; irow < cNRow; irow++) { |
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227 | if (cDataCol.isDefined(irow)) { |
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228 | Int iIF = cDataDescIdCol(irow); |
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229 | haveXPol(iIF) = True; |
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230 | } |
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231 | } |
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232 | } |
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233 | |
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234 | |
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235 | // Initialize member data. |
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236 | cBeams.assign(beams); |
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237 | cIFs.assign(IFs); |
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238 | cNChan.assign(nChan); |
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239 | cNPol.assign(nPol); |
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240 | cHaveXPol.assign(haveXPol); |
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241 | |
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242 | |
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243 | // Default channel range selection. |
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244 | cStartChan.resize(nIF); |
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245 | cEndChan.resize(nIF); |
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246 | cRefChan.resize(nIF); |
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247 | |
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248 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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249 | cStartChan(iIF) = 1; |
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250 | cEndChan(iIF) = cNChan(iIF); |
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251 | cRefChan(iIF) = cNChan(iIF)/2 + 1; |
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252 | } |
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253 | |
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254 | Slice all; |
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255 | cDataSel.resize(nIF); |
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256 | cDataSel = Slicer(all, all); |
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257 | |
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258 | cScanNo = 0; |
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259 | cCycleNo = 1; |
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260 | cTime = cTimeCol(0); |
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261 | |
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262 | return 0; |
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263 | } |
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264 | |
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265 | //---------------------------------------------------- PKSMS2reader::getHeader |
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266 | |
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267 | // Get parameters describing the data. |
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268 | |
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269 | Int PKSMS2reader::getHeader( |
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270 | String &observer, |
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271 | String &project, |
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272 | String &antName, |
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273 | Vector<Double> &antPosition, |
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274 | String &obsMode, |
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275 | Float &equinox, |
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276 | String &dopplerFrame, |
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277 | Double &mjd, |
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278 | Double &refFreq, |
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279 | Double &bandwidth, |
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280 | String &fluxunit) |
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281 | { |
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282 | if (!cMSopen) { |
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283 | return 1; |
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284 | } |
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285 | |
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286 | // Observer and project. |
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287 | ROMSObservationColumns observationCols(cPKSMS.observation()); |
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288 | observer = observationCols.observer()(0); |
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289 | project = observationCols.project()(0); |
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290 | |
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291 | // Antenna name and ITRF coordinates. |
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292 | ROMSAntennaColumns antennaCols(cPKSMS.antenna()); |
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293 | antName = antennaCols.name()(0); |
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294 | antPosition = antennaCols.position()(0); |
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295 | |
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296 | // Observation type. |
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297 | if (cObsModeCol.nrow()) { |
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298 | obsMode = cObsModeCol(0); |
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299 | if (obsMode == "\0") obsMode = "RF"; |
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300 | } else { |
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301 | obsMode = "RF"; |
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302 | } |
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303 | |
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304 | fluxunit = ""; |
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305 | const TableRecord& keywordSet |
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306 | = cFloatDataCol.columnDesc().keywordSet(); |
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307 | if(keywordSet.isDefined("UNIT")) { |
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308 | fluxunit = keywordSet.asString("UNIT"); |
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309 | } |
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310 | |
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311 | // Coordinate equinox. |
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312 | ROMSPointingColumns pointingCols(cPKSMS.pointing()); |
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313 | String dirref = pointingCols.direction().keywordSet().asRecord("MEASINFO"). |
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314 | asString("Ref"); |
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315 | sscanf(dirref.chars()+1, "%f", &equinox); |
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316 | |
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317 | // Frequency/velocity reference frame. |
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318 | ROMSSpWindowColumns spWinCols(cPKSMS.spectralWindow()); |
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319 | dopplerFrame = MFrequency::showType(spWinCols.measFreqRef()(0)); |
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320 | |
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321 | // Translate to FITS standard names. |
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322 | if (dopplerFrame == "TOPO") { |
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323 | dopplerFrame = "TOPOCENT"; |
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324 | } else if (dopplerFrame == "GEO") { |
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325 | dopplerFrame = "GEOCENTR"; |
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326 | } else if (dopplerFrame == "BARY") { |
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327 | dopplerFrame = "BARYCENT"; |
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328 | } else if (dopplerFrame == "GALACTO") { |
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329 | dopplerFrame = "GALACTOC"; |
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330 | } else if (dopplerFrame == "LGROUP") { |
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331 | dopplerFrame = "LOCALGRP"; |
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332 | } else if (dopplerFrame == "CMB") { |
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333 | dopplerFrame = "CMBDIPOL"; |
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334 | } else if (dopplerFrame == "REST") { |
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335 | dopplerFrame = "SOURCE"; |
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336 | } |
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337 | |
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338 | // MJD at start of observation. |
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339 | mjd = cTimeCol(0)/86400.0; |
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340 | |
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341 | // Reference frequency and bandwidth. |
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342 | refFreq = spWinCols.refFrequency()(0); |
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343 | bandwidth = spWinCols.totalBandwidth()(0); |
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344 | |
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345 | return 0; |
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346 | } |
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347 | |
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348 | //-------------------------------------------------- PKSMS2reader::getFreqInfo |
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349 | |
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350 | // Get frequency parameters for each IF. |
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351 | |
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352 | Int PKSMS2reader::getFreqInfo( |
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353 | Vector<Double> &startFreq, |
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354 | Vector<Double> &endFreq) |
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355 | { |
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356 | uInt nIF = cIFs.nelements(); |
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357 | startFreq.resize(nIF); |
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358 | endFreq.resize(nIF); |
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359 | |
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360 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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361 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
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362 | |
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363 | Int nChan = chanFreq.nelements(); |
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364 | startFreq(iIF) = chanFreq(0); |
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365 | endFreq(iIF) = chanFreq(nChan-1); |
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366 | } |
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367 | |
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368 | return 0; |
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369 | } |
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370 | |
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371 | //------------------------------------------------------- PKSMS2reader::select |
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372 | |
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373 | // Set data selection by beam number and channel. |
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374 | |
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375 | uInt PKSMS2reader::select( |
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376 | const Vector<Bool> beamSel, |
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377 | const Vector<Bool> IFsel, |
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378 | const Vector<Int> startChan, |
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379 | const Vector<Int> endChan, |
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380 | const Vector<Int> refChan, |
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381 | const Bool getSpectra, |
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382 | const Bool getXPol, |
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383 | const Bool getFeedPos) |
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384 | { |
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385 | if (!cMSopen) { |
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386 | return 1; |
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387 | } |
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388 | |
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389 | // Beam selection. |
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390 | uInt nBeam = cBeams.nelements(); |
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391 | uInt nBeamSel = beamSel.nelements(); |
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392 | for (uInt ibeam = 0; ibeam < nBeam; ibeam++) { |
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393 | if (ibeam < nBeamSel) { |
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394 | cBeams(ibeam) = beamSel(ibeam); |
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395 | } else { |
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396 | cBeams(ibeam) = False; |
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397 | } |
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398 | } |
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399 | |
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400 | uInt nIF = cIFs.nelements(); |
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401 | uInt maxNChan = 0; |
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402 | for (uInt iIF = 0; iIF < nIF; iIF++) { |
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403 | // IF selection. |
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404 | if (iIF < IFsel.nelements()) { |
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405 | cIFs(iIF) = IFsel(iIF); |
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406 | } else { |
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407 | cIFs(iIF) = False; |
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408 | } |
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409 | |
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410 | if (!cIFs(iIF)) continue; |
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411 | |
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412 | |
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413 | // Channel selection. |
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414 | if (iIF < startChan.nelements()) { |
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415 | cStartChan(iIF) = startChan(iIF); |
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416 | |
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417 | if (cStartChan(iIF) <= 0) { |
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418 | cStartChan(iIF) += cNChan(iIF); |
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419 | } else if (cStartChan(iIF) > Int(cNChan(iIF))) { |
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420 | cStartChan(iIF) = cNChan(iIF); |
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421 | } |
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422 | } |
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423 | |
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424 | if (iIF < endChan.nelements()) { |
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425 | cEndChan(iIF) = endChan(iIF); |
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426 | |
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427 | if (cEndChan(iIF) <= 0) { |
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428 | cEndChan(iIF) += cNChan(iIF); |
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429 | } else if (cEndChan(iIF) > Int(cNChan(iIF))) { |
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430 | cEndChan(iIF) = cNChan(iIF); |
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431 | } |
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432 | } |
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433 | |
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434 | if (iIF < refChan.nelements()) { |
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435 | cRefChan(iIF) = refChan(iIF); |
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436 | } else { |
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437 | cRefChan(iIF) = cStartChan(iIF); |
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438 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
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439 | cRefChan(iIF) += (cEndChan(iIF) - cStartChan(iIF) + 1)/2; |
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440 | } else { |
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441 | cRefChan(iIF) -= (cStartChan(iIF) - cEndChan(iIF) + 1)/2; |
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442 | } |
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443 | } |
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444 | |
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445 | uInt nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
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446 | if (maxNChan < nChan) { |
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447 | maxNChan = nChan; |
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448 | } |
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449 | |
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450 | // Inverted Slices are not allowed. |
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451 | Slice outPols; |
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452 | Slice outChans(min(cStartChan(iIF),cEndChan(iIF))-1, nChan); |
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453 | cDataSel(iIF) = Slicer(outPols, outChans); |
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454 | } |
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455 | |
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456 | // Get spectral data? |
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457 | cGetSpectra = getSpectra; |
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458 | |
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459 | // Get cross-polarization data? |
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460 | cGetXPol = cGetXPol && getXPol; |
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461 | |
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462 | // Get feed positions? (Not available.) |
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463 | cGetFeedPos = False; |
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464 | |
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465 | return maxNChan; |
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466 | } |
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467 | |
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468 | //---------------------------------------------------- PKSMS2reader::findRange |
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469 | |
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470 | // Find the range of the data in time and position. |
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471 | |
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472 | Int PKSMS2reader::findRange( |
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473 | Int &nRow, |
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474 | Int &nSel, |
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475 | Vector<Double> &timeSpan, |
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476 | Matrix<Double> &positions) |
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477 | { |
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478 | if (!cMSopen) { |
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479 | return 1; |
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480 | } |
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481 | |
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482 | nRow = cNRow; |
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483 | |
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484 | // Find the number of rows selected. |
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485 | nSel = 0; |
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486 | Vector<Bool> sel(nRow); |
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487 | for (Int irow = 0; irow < nRow; irow++) { |
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488 | if ((sel(irow) = cBeams(cBeamNoCol(irow)) && |
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489 | cIFs(cDataDescIdCol(irow)))) { |
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490 | nSel++; |
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491 | } |
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492 | } |
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493 | |
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494 | // Find the time range (s). |
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495 | timeSpan.resize(2); |
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496 | timeSpan(0) = cTimeCol(0); |
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497 | timeSpan(1) = cTimeCol(nRow-1); |
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498 | |
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499 | // Retrieve positions for selected data. |
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500 | Int isel = 0; |
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501 | positions.resize(2,nSel); |
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502 | for (Int irow = 0; irow < nRow; irow++) { |
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503 | if (sel(irow)) { |
---|
504 | Matrix<Double> pointingDir = cPointingCol(cFieldIdCol(irow)); |
---|
505 | positions.column(isel++) = pointingDir.column(0); |
---|
506 | } |
---|
507 | } |
---|
508 | |
---|
509 | return 0; |
---|
510 | } |
---|
511 | |
---|
512 | //--------------------------------------------------------- PKSMS2reader::read |
---|
513 | |
---|
514 | // Read the next data record. |
---|
515 | |
---|
516 | Int PKSMS2reader::read( |
---|
517 | Int &scanNo, |
---|
518 | Int &cycleNo, |
---|
519 | Double &mjd, |
---|
520 | Double &interval, |
---|
521 | String &fieldName, |
---|
522 | String &srcName, |
---|
523 | Vector<Double> &srcDir, |
---|
524 | Vector<Double> &srcPM, |
---|
525 | Double &srcVel, |
---|
526 | String &obsMode, |
---|
527 | Int &IFno, |
---|
528 | Double &refFreq, |
---|
529 | Double &bandwidth, |
---|
530 | Double &freqInc, |
---|
531 | Double &restFreq, |
---|
532 | Vector<Float> &tcal, |
---|
533 | String &tcalTime, |
---|
534 | Float &azimuth, |
---|
535 | Float &elevation, |
---|
536 | Float &parAngle, |
---|
537 | Float &focusAxi, |
---|
538 | Float &focusTan, |
---|
539 | Float &focusRot, |
---|
540 | Float &temperature, |
---|
541 | Float &pressure, |
---|
542 | Float &humidity, |
---|
543 | Float &windSpeed, |
---|
544 | Float &windAz, |
---|
545 | Int &refBeam, |
---|
546 | Int &beamNo, |
---|
547 | Vector<Double> &direction, |
---|
548 | Vector<Double> &scanRate, |
---|
549 | Vector<Float> &tsys, |
---|
550 | Vector<Float> &sigma, |
---|
551 | Vector<Float> &calFctr, |
---|
552 | Matrix<Float> &baseLin, |
---|
553 | Matrix<Float> &baseSub, |
---|
554 | Matrix<Float> &spectra, |
---|
555 | Matrix<uChar> &flagged, |
---|
556 | Complex &xCalFctr, |
---|
557 | Vector<Complex> &xPol) |
---|
558 | { |
---|
559 | if (!cMSopen) { |
---|
560 | return 1; |
---|
561 | } |
---|
562 | |
---|
563 | // Check for EOF. |
---|
564 | if (cIdx >= cNRow) { |
---|
565 | return -1; |
---|
566 | } |
---|
567 | |
---|
568 | // Find the next selected beam and IF. |
---|
569 | Int ibeam; |
---|
570 | Int iIF; |
---|
571 | Int iDataDesc; |
---|
572 | |
---|
573 | while (True) { |
---|
574 | ibeam = cBeamNoCol(cIdx); |
---|
575 | iDataDesc = cDataDescIdCol(cIdx); |
---|
576 | iIF =cSpWinIdCol(iDataDesc); |
---|
577 | if (cBeams(ibeam) && cIFs(iIF)) { |
---|
578 | break; |
---|
579 | } |
---|
580 | |
---|
581 | // Check for EOF. |
---|
582 | if (++cIdx >= cNRow) { |
---|
583 | return -1; |
---|
584 | } |
---|
585 | } |
---|
586 | |
---|
587 | // Renumerate scan no. Here still is 1-based |
---|
588 | //scanNo = cScanNoCol(cIdx) - cScanNoCol(0) + 1; |
---|
589 | scanNo = cScanNoCol(cIdx); |
---|
590 | |
---|
591 | if (scanNo != cScanNo) { |
---|
592 | // Start of new scan. |
---|
593 | cScanNo = scanNo; |
---|
594 | cCycleNo = 1; |
---|
595 | cTime = cTimeCol(cIdx); |
---|
596 | } |
---|
597 | |
---|
598 | Double time = cTimeCol(cIdx); |
---|
599 | mjd = time/86400.0; |
---|
600 | interval = cIntervalCol(cIdx); |
---|
601 | |
---|
602 | // Reconstruct the integration cycle number; due to small latencies the |
---|
603 | // integration time is usually slightly less than the time between cycles, |
---|
604 | // resetting cTime will prevent the difference from accumulating. |
---|
605 | cCycleNo += nint((time - cTime)/interval); |
---|
606 | cycleNo = cCycleNo; |
---|
607 | cTime = time; |
---|
608 | |
---|
609 | Int fieldId = cFieldIdCol(cIdx); |
---|
610 | fieldName = cFieldNameCol(fieldId); |
---|
611 | |
---|
612 | Int srcId = cSrcIdCol(fieldId); |
---|
613 | //For source with multiple spectral window setting, this is not |
---|
614 | // correct. Source name of srcId may not be at 'srcId'th row of SrcNameCol |
---|
615 | //srcName = cSrcNameCol(srcId); |
---|
616 | for (uInt irow = 0; irow < cSrcId2Col.nrow(); irow++) { |
---|
617 | if (cSrcId2Col(irow) == srcId) { |
---|
618 | srcName = cSrcNameCol(irow); |
---|
619 | } |
---|
620 | } |
---|
621 | |
---|
622 | srcDir = cSrcDirCol(srcId); |
---|
623 | srcPM = cSrcPMCol(srcId); |
---|
624 | |
---|
625 | // Systemic velocity. |
---|
626 | if (!cHaveSrcVel) { |
---|
627 | srcVel = 0.0f; |
---|
628 | } else { |
---|
629 | srcVel = cSrcVelCol(srcId)(IPosition(1,0)); |
---|
630 | } |
---|
631 | |
---|
632 | ROMSAntennaColumns antennaCols(cPKSMS.antenna()); |
---|
633 | String telescope = antennaCols.name()(0); |
---|
634 | Bool cGBT = telescope.contains("GBT"); |
---|
635 | // Observation type. |
---|
636 | Int stateId = cStateIdCol(cIdx); |
---|
637 | if (stateId == -1) { |
---|
638 | //obsMode = " "; |
---|
639 | } else { |
---|
640 | obsMode = cObsModeCol(stateId); |
---|
641 | Bool sigState =cSigStateCol(stateId); |
---|
642 | Bool refState =cRefStateCol(stateId); |
---|
643 | //DEBUG |
---|
644 | //cerr <<"stateid="<<stateId<<" obsmode="<<obsMode<<endl; |
---|
645 | if (cGBT) { |
---|
646 | // split the obsMode string and append a proper label |
---|
647 | // (these are GBT specific) |
---|
648 | int epos = obsMode.find_first_of(':'); |
---|
649 | int nextpos = obsMode.find_first_of(':',epos+1); |
---|
650 | string obsMode1 = obsMode.substr(0,epos); |
---|
651 | string obsMode2 = obsMode.substr(epos+1,nextpos-epos-1); |
---|
652 | |
---|
653 | //cerr <<"obsMode2= "<<obsMode2<<endl; |
---|
654 | if (!srcName.contains("_ps") |
---|
655 | &&!srcName.contains("_psr") |
---|
656 | &&!srcName.contains("_nod") |
---|
657 | &&!srcName.contains("_fs") |
---|
658 | &&!srcName.contains("_fsr")) { |
---|
659 | // if Nod mode observation , append '_nod' |
---|
660 | if (obsMode1 == "Nod") { |
---|
661 | srcName.append("_nod"); |
---|
662 | } else if (obsMode1 == "OffOn") { |
---|
663 | // for GBT position switch observations (OffOn or OnOff) |
---|
664 | if (obsMode2 == "PSWITCHON") srcName.append("_ps"); |
---|
665 | if (obsMode2 == "PSWITCHOFF") srcName.append("_psr"); |
---|
666 | } else { |
---|
667 | if (obsMode2 == "FSWITCH") { |
---|
668 | // for GBT frequency switch mode |
---|
669 | if (sigState) srcName.append("_fs"); |
---|
670 | if (refState) srcName.append("_fsr"); |
---|
671 | } |
---|
672 | } |
---|
673 | } |
---|
674 | } |
---|
675 | } |
---|
676 | // CAL state |
---|
677 | // this should be apply just for GBT data? |
---|
678 | Double Cal; |
---|
679 | if (stateId==-1) { |
---|
680 | Cal = 0; |
---|
681 | } else { |
---|
682 | Cal = cCalCol(stateId); |
---|
683 | } |
---|
684 | if (cGBT) { |
---|
685 | if (Cal > 0 && !srcName.contains("_calon")) { |
---|
686 | srcName.append("_calon"); |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | IFno = iIF + 1; |
---|
691 | Int nChan = abs(cEndChan(iIF) - cStartChan(iIF)) + 1; |
---|
692 | |
---|
693 | // Minimal handling on continuum data. |
---|
694 | Vector<Double> chanFreq = cChanFreqCol(iIF); |
---|
695 | if (nChan == 1) { |
---|
696 | cout << "The input is continuum data. "<< endl; |
---|
697 | freqInc = chanFreq(0); |
---|
698 | refFreq = chanFreq(0); |
---|
699 | restFreq = 0.0f; |
---|
700 | } else { |
---|
701 | if (cStartChan(iIF) <= cEndChan(iIF)) { |
---|
702 | freqInc = chanFreq(1) - chanFreq(0); |
---|
703 | } else { |
---|
704 | freqInc = chanFreq(0) - chanFreq(1); |
---|
705 | } |
---|
706 | refFreq = chanFreq(cRefChan(iIF)-1); |
---|
707 | restFreq = cSrcRestFrqCol(srcId)(IPosition(1,0)); |
---|
708 | } |
---|
709 | bandwidth = abs(freqInc * nChan); |
---|
710 | |
---|
711 | tcal.resize(cNPol(iIF)); |
---|
712 | tcal = 0.0f; |
---|
713 | tcalTime = ""; |
---|
714 | //azimuth = 0.0f; |
---|
715 | //elevation = 0.0f; |
---|
716 | parAngle = 0.0f; |
---|
717 | focusAxi = 0.0f; |
---|
718 | focusTan = 0.0f; |
---|
719 | focusRot = 0.0f; |
---|
720 | |
---|
721 | // Find the appropriate entry in the WEATHER subtable. |
---|
722 | Vector<Double> wTimes = cWeatherTimeCol.getColumn(); |
---|
723 | Int weatherIdx; |
---|
724 | for (weatherIdx = wTimes.nelements()-1; weatherIdx >= 0; weatherIdx--) { |
---|
725 | if (cWeatherTimeCol(weatherIdx) <= time) { |
---|
726 | break; |
---|
727 | } |
---|
728 | } |
---|
729 | |
---|
730 | if (weatherIdx < 0) { |
---|
731 | // No appropriate WEATHER entry. |
---|
732 | pressure = 0.0f; |
---|
733 | humidity = 0.0f; |
---|
734 | temperature = 0.0f; |
---|
735 | } else { |
---|
736 | pressure = cPressureCol(weatherIdx); |
---|
737 | humidity = cHumidityCol(weatherIdx); |
---|
738 | temperature = cTemperatureCol(weatherIdx); |
---|
739 | } |
---|
740 | |
---|
741 | windSpeed = 0.0f; |
---|
742 | windAz = 0.0f; |
---|
743 | |
---|
744 | refBeam = 0; |
---|
745 | beamNo = ibeam + 1; |
---|
746 | |
---|
747 | //Matrix<Double> pointingDir = cPointingCol(fieldId); |
---|
748 | //pointingDir = cPointingCol(fieldId); |
---|
749 | //direction = pointingDir.column(0); |
---|
750 | //uInt ncols = pointingDir.ncolumn(); |
---|
751 | //if (ncols == 1) { |
---|
752 | // scanRate = 0.0f; |
---|
753 | //} else { |
---|
754 | // scanRate = pointingDir.column(1); |
---|
755 | //} |
---|
756 | |
---|
757 | // Get direction from FIELD table |
---|
758 | // here, assume direction to be the field direction not pointing |
---|
759 | Matrix<Double> delayDir = cFieldDelayDirCol(fieldId); |
---|
760 | direction = delayDir.column(0); |
---|
761 | uInt ncols = delayDir.ncolumn(); |
---|
762 | if (ncols == 1) { |
---|
763 | scanRate = 0.0f; |
---|
764 | } else { |
---|
765 | scanRate = delayDir.column(1); |
---|
766 | } |
---|
767 | |
---|
768 | // caluculate azimuth and elevation |
---|
769 | // first, get the reference frame |
---|
770 | MVPosition mvpos(antennaCols.position()(0)); |
---|
771 | MPosition mp(mvpos); |
---|
772 | Quantum<Double> qt(time,"s"); |
---|
773 | MVEpoch mvt(qt); |
---|
774 | MEpoch me(mvt); |
---|
775 | MeasFrame frame(mp, me); |
---|
776 | // |
---|
777 | ROMSFieldColumns fldCols(cPKSMS.field()); |
---|
778 | Vector<MDirection> vmd(1); |
---|
779 | MDirection md; |
---|
780 | fldCols.delayDirMeasCol().get(fieldId,vmd); |
---|
781 | md = vmd[0]; |
---|
782 | //Vector<Double> dircheck = md.getAngle("rad").getValue(); |
---|
783 | //cerr<<"dircheck="<<dircheck<<endl; |
---|
784 | |
---|
785 | Vector<Double> azel = |
---|
786 | MDirection::Convert(md, MDirection::Ref(MDirection::AZEL, |
---|
787 | frame) |
---|
788 | )().getAngle("rad").getValue(); |
---|
789 | //cerr<<"azel="<<azel<<endl; |
---|
790 | azimuth = azel[0]; |
---|
791 | elevation = azel[1]; |
---|
792 | |
---|
793 | // Get Tsys assuming that entries in the SYSCAL table match the main table. |
---|
794 | if (cHaveTsys) { |
---|
795 | Int nTsysColRow = cTsysCol.nrow(); |
---|
796 | if (nTsysColRow != cNRow) { |
---|
797 | cHaveTsys=0; |
---|
798 | } |
---|
799 | } |
---|
800 | if (cHaveTsys) { |
---|
801 | cTsysCol.get(cIdx, tsys, True); |
---|
802 | } else { |
---|
803 | Int numReceptor; |
---|
804 | cNumReceptorCol.get(0, numReceptor); |
---|
805 | tsys.resize(numReceptor); |
---|
806 | tsys = 1.0f; |
---|
807 | } |
---|
808 | cSigmaCol.get(cIdx, sigma, True); |
---|
809 | |
---|
810 | //get Tcal if available |
---|
811 | if (cHaveTcal) { |
---|
812 | Int nTcalColRow = cTcalCol.nrow(); |
---|
813 | uInt nBeam = cBeams.nelements(); |
---|
814 | uInt nIF = cIFs.nelements(); |
---|
815 | uInt nrws = nBeam * nIF; |
---|
816 | if (nTcalColRow > 0) { |
---|
817 | // find tcal match with the data with the data time stamp |
---|
818 | Double mjds = mjd*(24*3600); |
---|
819 | Double dtcalTime; |
---|
820 | if ( mjd > lastmjd || cIdx==0 ) { |
---|
821 | //Table tmptab = cSysCalTab(near(cSysCalTab.col("TIME"),mjds)); |
---|
822 | tmptab = cSysCalTab(near(cSysCalTab.col("TIME"),mjds), nrws); |
---|
823 | //DEBUG |
---|
824 | //if (cIdx == 0) { |
---|
825 | // cerr<<"inital table retrieved"<<endl; |
---|
826 | //} |
---|
827 | |
---|
828 | } |
---|
829 | |
---|
830 | if (nBeam == 1) { |
---|
831 | tmptab2 = tmptab( tmptab.col("SPECTRAL_WINDOW_ID") == iIF, 1); |
---|
832 | } else { |
---|
833 | tmptab2 = tmptab( tmptab.col("SPECTRAL_WINDOW_ID") == iIF && |
---|
834 | tmptab.col("FEED_ID") == ibeam , 1); |
---|
835 | } |
---|
836 | //cerr<<"first subtab rows="<<tmptab.nrow()<<endl; |
---|
837 | int syscalrow = tmptab2.nrow(); |
---|
838 | ROArrayColumn<Float> tcalCol(tmptab2, "TCAL"); |
---|
839 | ROScalarColumn<Double> tcalTimeCol(tmptab2, "TIME"); |
---|
840 | if (syscalrow==0) { |
---|
841 | cerr<<"Cannot find any matching Tcal at/near the data timestamp." |
---|
842 | << " Set Tcal=0.0"<<endl; |
---|
843 | } else { |
---|
844 | tcalCol.get(0, tcal); |
---|
845 | tcalTimeCol.get(0,dtcalTime); |
---|
846 | tcalTime = MVTime(dtcalTime/(24*3600)).string(MVTime::YMD); |
---|
847 | //DEBUG |
---|
848 | //cerr<<"cIdx:"<<cIdx<<" tcal="<<tcal<<" tcalTime="<<tcalTime<<endl; |
---|
849 | tmptab.markForDelete(); |
---|
850 | tmptab2.markForDelete(); |
---|
851 | } |
---|
852 | } |
---|
853 | lastmjd = mjd; |
---|
854 | } |
---|
855 | |
---|
856 | // Calibration factors (if available). |
---|
857 | calFctr.resize(cNPol(iIF)); |
---|
858 | if (cHaveCalFctr) { |
---|
859 | cCalFctrCol.get(cIdx, calFctr); |
---|
860 | } else { |
---|
861 | calFctr = 0.0f; |
---|
862 | } |
---|
863 | |
---|
864 | // Baseline parameters (if available). |
---|
865 | if (cHaveBaseLin) { |
---|
866 | baseLin.resize(2,cNPol(iIF)); |
---|
867 | cBaseLinCol.get(cIdx, baseLin); |
---|
868 | |
---|
869 | baseSub.resize(9,cNPol(iIF)); |
---|
870 | cBaseSubCol.get(cIdx, baseSub); |
---|
871 | |
---|
872 | } else { |
---|
873 | baseLin.resize(0,0); |
---|
874 | baseSub.resize(0,0); |
---|
875 | } |
---|
876 | |
---|
877 | // Get spectral data. |
---|
878 | if (cGetSpectra) { |
---|
879 | Matrix<Float> tmpData; |
---|
880 | Matrix<Bool> tmpFlag; |
---|
881 | cFloatDataCol.getSlice(cIdx, cDataSel(iIF), tmpData, True); |
---|
882 | cFlagCol.getSlice(cIdx, cDataSel(iIF), tmpFlag, True); |
---|
883 | |
---|
884 | // Transpose spectra. |
---|
885 | Int nPol = tmpData.nrow(); |
---|
886 | spectra.resize(nChan, nPol); |
---|
887 | flagged.resize(nChan, nPol); |
---|
888 | if (cEndChan(iIF) >= cStartChan(iIF)) { |
---|
889 | // Simple transposition. |
---|
890 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
891 | for (Int ichan = 0; ichan < nChan; ichan++) { |
---|
892 | spectra(ichan,ipol) = tmpData(ipol,ichan); |
---|
893 | flagged(ichan,ipol) = tmpFlag(ipol,ichan); |
---|
894 | } |
---|
895 | } |
---|
896 | |
---|
897 | } else { |
---|
898 | // Transpose with inversion. |
---|
899 | Int jchan = nChan - 1; |
---|
900 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
901 | for (Int ichan = 0; ichan < nChan; ichan++, jchan--) { |
---|
902 | spectra(ichan,ipol) = tmpData(ipol,jchan); |
---|
903 | flagged(ichan,ipol) = tmpFlag(ipol,jchan); |
---|
904 | } |
---|
905 | } |
---|
906 | } |
---|
907 | } |
---|
908 | |
---|
909 | // Get cross-polarization data. |
---|
910 | if (cGetXPol) { |
---|
911 | if (cHaveXCalFctr) { |
---|
912 | cXCalFctrCol.get(cIdx, xCalFctr); |
---|
913 | } else { |
---|
914 | xCalFctr = Complex(0.0f, 0.0f); |
---|
915 | } |
---|
916 | |
---|
917 | cDataCol.get(cIdx, xPol, True); |
---|
918 | |
---|
919 | if (cEndChan(iIF) < cStartChan(iIF)) { |
---|
920 | Complex ctmp; |
---|
921 | Int jchan = nChan - 1; |
---|
922 | for (Int ichan = 0; ichan < nChan/2; ichan++, jchan--) { |
---|
923 | ctmp = xPol(ichan); |
---|
924 | xPol(ichan) = xPol(jchan); |
---|
925 | xPol(jchan) = ctmp; |
---|
926 | } |
---|
927 | } |
---|
928 | } |
---|
929 | |
---|
930 | cIdx++; |
---|
931 | |
---|
932 | return 0; |
---|
933 | } |
---|
934 | |
---|
935 | //--------------------------------------------------------- PKSMS2reader::read |
---|
936 | |
---|
937 | // Read the next data record, just the basics. |
---|
938 | |
---|
939 | Int PKSMS2reader::read( |
---|
940 | Int &IFno, |
---|
941 | Vector<Float> &tsys, |
---|
942 | Vector<Float> &calFctr, |
---|
943 | Matrix<Float> &baseLin, |
---|
944 | Matrix<Float> &baseSub, |
---|
945 | Matrix<Float> &spectra, |
---|
946 | Matrix<uChar> &flagged) |
---|
947 | { |
---|
948 | if (!cMSopen) { |
---|
949 | return 1; |
---|
950 | } |
---|
951 | |
---|
952 | // Check for EOF. |
---|
953 | if (cIdx >= cNRow) { |
---|
954 | return -1; |
---|
955 | } |
---|
956 | |
---|
957 | // Find the next selected beam and IF. |
---|
958 | Int ibeam; |
---|
959 | Int iIF; |
---|
960 | Int iDataDesc; |
---|
961 | while (True) { |
---|
962 | ibeam = cBeamNoCol(cIdx); |
---|
963 | //iIF = cDataDescIdCol(cIdx); |
---|
964 | iDataDesc = cDataDescIdCol(cIdx); |
---|
965 | iIF = cSpWinIdCol(iDataDesc); |
---|
966 | if (cBeams(ibeam) && cIFs(iIF)) { |
---|
967 | break; |
---|
968 | } |
---|
969 | |
---|
970 | // Check for EOF. |
---|
971 | if (++cIdx >= cNRow) { |
---|
972 | return -1; |
---|
973 | } |
---|
974 | } |
---|
975 | |
---|
976 | IFno = iIF + 1; |
---|
977 | // Get Tsys assuming that entries in the SYSCAL table match the main table. |
---|
978 | cTsysCol.get(cIdx, tsys, True); |
---|
979 | |
---|
980 | // Calibration factors (if available). |
---|
981 | if (cHaveCalFctr) { |
---|
982 | cCalFctrCol.get(cIdx, calFctr, True); |
---|
983 | } else { |
---|
984 | calFctr.resize(cNPol(iIF)); |
---|
985 | calFctr = 0.0f; |
---|
986 | } |
---|
987 | |
---|
988 | // Baseline parameters (if available). |
---|
989 | if (cHaveBaseLin) { |
---|
990 | baseLin.resize(2,cNPol(iIF)); |
---|
991 | cBaseLinCol.get(cIdx, baseLin); |
---|
992 | |
---|
993 | baseSub.resize(9,cNPol(iIF)); |
---|
994 | cBaseSubCol.get(cIdx, baseSub); |
---|
995 | |
---|
996 | } else { |
---|
997 | baseLin.resize(0,0); |
---|
998 | baseSub.resize(0,0); |
---|
999 | } |
---|
1000 | |
---|
1001 | if (cGetSpectra) { |
---|
1002 | // Get spectral data. |
---|
1003 | Matrix<Float> tmpData; |
---|
1004 | Matrix<Bool> tmpFlag; |
---|
1005 | cFloatDataCol.getSlice(cIdx, cDataSel(iIF), tmpData, True); |
---|
1006 | cFlagCol.getSlice(cIdx, cDataSel(iIF), tmpFlag, True); |
---|
1007 | |
---|
1008 | // Transpose spectra. |
---|
1009 | Int nChan = tmpData.ncolumn(); |
---|
1010 | Int nPol = tmpData.nrow(); |
---|
1011 | spectra.resize(nChan, nPol); |
---|
1012 | flagged.resize(nChan, nPol); |
---|
1013 | if (cEndChan(iIF) >= cStartChan(iIF)) { |
---|
1014 | // Simple transposition. |
---|
1015 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
1016 | for (Int ichan = 0; ichan < nChan; ichan++) { |
---|
1017 | spectra(ichan,ipol) = tmpData(ipol,ichan); |
---|
1018 | flagged(ichan,ipol) = tmpFlag(ipol,ichan); |
---|
1019 | } |
---|
1020 | } |
---|
1021 | |
---|
1022 | } else { |
---|
1023 | // Transpose with inversion. |
---|
1024 | Int jchan = nChan - 1; |
---|
1025 | for (Int ipol = 0; ipol < nPol; ipol++) { |
---|
1026 | for (Int ichan = 0; ichan < nChan; ichan++, jchan--) { |
---|
1027 | spectra(ichan,ipol) = tmpData(ipol,jchan); |
---|
1028 | flagged(ichan,ipol) = tmpFlag(ipol,jchan); |
---|
1029 | } |
---|
1030 | } |
---|
1031 | } |
---|
1032 | } |
---|
1033 | |
---|
1034 | cIdx++; |
---|
1035 | |
---|
1036 | return 0; |
---|
1037 | } |
---|
1038 | |
---|
1039 | //-------------------------------------------------------- PKSMS2reader::close |
---|
1040 | |
---|
1041 | // Close the MS. |
---|
1042 | |
---|
1043 | void PKSMS2reader::close() |
---|
1044 | { |
---|
1045 | cPKSMS = MeasurementSet(); |
---|
1046 | cMSopen = False; |
---|
1047 | } |
---|