1 | //#--------------------------------------------------------------------------- |
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2 | //# SDReader.cc: A class to read single dish spectra from SDFITS, RPFITS |
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3 | //#--------------------------------------------------------------------------- |
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4 | //# Copyright (C) 2004 |
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5 | //# ATNF |
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6 | //# |
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7 | //# This program is free software; you can redistribute it and/or modify it |
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8 | //# under the terms of the GNU General Public License as published by the Free |
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9 | //# Software Foundation; either version 2 of the License, or (at your option) |
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10 | //# any later version. |
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11 | //# |
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12 | //# This program 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 |
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14 | //# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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15 | //# Public License for more details. |
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16 | //# |
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17 | //# You should have received a copy of the GNU General Public License along |
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18 | //# with this program; if not, write to the Free Software Foundation, Inc., |
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19 | //# 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
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20 | //# |
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21 | //# Correspondence concerning this software should be addressed as follows: |
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22 | //# Internet email: Malte.Marquarding@csiro.au |
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23 | //# Postal address: Malte Marquarding, |
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24 | //# Australia Telescope National Facility, |
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25 | //# P.O. Box 76, |
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26 | //# Epping, NSW, 2121, |
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27 | //# AUSTRALIA |
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28 | //# |
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29 | //# $Id: |
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30 | //#--------------------------------------------------------------------------- |
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31 | #include <casa/Exceptions.h> |
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32 | #include <casa/OS/Path.h> |
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33 | #include <casa/OS/File.h> |
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34 | #include <atnf/PKSIO/PKSreader.h> |
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35 | |
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36 | #include "SDReader.h" |
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37 | |
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38 | using namespace casa; |
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39 | using namespace asap; |
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40 | |
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41 | SDReader::SDReader() : |
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42 | reader_(0), |
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43 | table_(new SDMemTable()) { |
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44 | cursor_ = 0; |
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45 | } |
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46 | SDReader::SDReader(const std::string& filename) : |
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47 | reader_(0), |
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48 | table_(new SDMemTable()) { |
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49 | cursor_ = 0; |
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50 | open(filename); |
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51 | } |
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52 | |
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53 | SDReader::SDReader(CountedPtr<SDMemTable> tbl) : |
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54 | reader_(0), |
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55 | table_(tbl) { |
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56 | cursor_ = 0; |
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57 | } |
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58 | |
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59 | SDReader::~SDReader() { |
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60 | if (reader_) delete reader_; reader_ = 0; |
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61 | } |
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62 | |
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63 | void SDReader::reset() { |
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64 | cursor_ = 0; |
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65 | table_ = new SDMemTable(); |
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66 | if (reader_) delete reader_; reader_ = 0; |
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67 | // re-create the reader |
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68 | Bool haveBase, haveSpectra, haveXPol; |
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69 | String format; |
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70 | Vector<Bool> beams; |
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71 | if ((reader_ = getPKSreader(filename_, 0, False, format, beams, nIF_, |
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72 | nChan_, nPol_, haveBase, haveSpectra, |
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73 | haveXPol)) == 0) { |
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74 | throw(AipsError("PKSreader failed")); |
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75 | } |
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76 | // re-enter the header |
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77 | table_->putSDHeader(header_); |
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78 | } |
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79 | |
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80 | void SDReader::close() { |
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81 | cerr << "disabled" << endl; |
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82 | } |
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83 | |
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84 | void SDReader::open(const std::string& filename) { |
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85 | if (reader_) delete reader_; reader_ = 0; |
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86 | Bool haveBase, haveSpectra, haveXPol; |
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87 | // |
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88 | String inName(filename); |
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89 | Path path(inName); |
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90 | inName = path.expandedName(); |
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91 | // |
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92 | File file(inName); |
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93 | if (!file.exists()) { |
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94 | throw(AipsError("File does not exist")); |
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95 | } |
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96 | filename_ = inName; |
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97 | // |
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98 | String format; |
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99 | Vector<Bool> beams; |
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100 | if ((reader_ = getPKSreader(inName, 0, False, format, beams, nIF_, |
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101 | nChan_, nPol_, haveBase, haveSpectra, |
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102 | haveXPol)) == 0) { |
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103 | throw(AipsError("PKSreader failed")); |
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104 | } |
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105 | if (!haveSpectra) { |
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106 | delete reader_; |
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107 | reader_ = 0; |
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108 | throw(AipsError("No spectral data in file.")); |
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109 | return; |
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110 | } |
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111 | nBeam_ = beams.nelements(); |
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112 | // Get basic parameters. |
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113 | if (haveXPol) { |
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114 | cout << "Warning. Ignoring cross polarisation." << endl; |
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115 | nPol_--; |
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116 | } |
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117 | header_ = SDHeader(); |
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118 | header_.nchan = nChan_; |
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119 | header_.npol = nPol_; |
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120 | header_.nbeam = nBeam_; |
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121 | Int status = reader_->getHeader(header_.observer, header_.project, |
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122 | header_.antennaname, header_.antennaposition, |
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123 | header_.obstype,header_.equinox, |
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124 | header_.freqref, |
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125 | header_.utc, header_.reffreq, |
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126 | header_.bandwidth); |
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127 | if (status) { |
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128 | delete reader_; |
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129 | reader_ = 0; |
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130 | throw(AipsError("Failed to get header.")); |
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131 | return; |
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132 | } |
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133 | if ((header_.obstype).matches("*SW*")) { |
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134 | // need robust way here - probably read ahead of next timestamp |
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135 | cout << "Header indicates frequency switched observation.\n" |
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136 | "setting # of IFs = 1 " << endl; |
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137 | nIF_ = 1; |
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138 | } |
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139 | header_.nif = nIF_; |
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140 | header_.fluxunit = "K"; |
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141 | header_.epoch = "UTC"; |
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142 | // Apply selection criteria. |
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143 | Vector<Int> start(nIF_, 1); |
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144 | Vector<Int> end(nIF_, 0); |
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145 | Vector<Int> ref; |
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146 | Vector<Bool> beamSel(nBeam_,True); |
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147 | Vector<Bool> IFsel(nIF_,True); |
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148 | reader_->select(beamSel, IFsel, start, end, ref, True, haveXPol); |
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149 | table_->putSDHeader(header_); |
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150 | frequencies_.setRefFrame(header_.freqref); |
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151 | frequencies_.setRestFrequencyUnit("Hz"); |
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152 | frequencies_.setEquinox(header_.equinox); |
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153 | } |
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154 | |
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155 | int SDReader::read(const std::vector<int>& seq) { |
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156 | int status = 0; |
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157 | |
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158 | Int beamNo, IFno, refBeam, scanNo, cycleNo; |
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159 | Float azimuth, elevation, focusAxi, focusRot, focusTan, |
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160 | humidity, parAngle, pressure, temperature, windAz, windSpeed; |
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161 | Double bandwidth, freqInc, interval, mjd, refFreq, restFreq, srcVel; |
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162 | String fieldName, srcName, tcalTime; |
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163 | Vector<Float> calFctr, sigma, tcal, tsys; |
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164 | Matrix<Float> baseLin, baseSub; |
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165 | Vector<Double> direction(2), scanRate(2), srcDir(2), srcPM(2); |
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166 | Matrix<Float> spectra; |
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167 | Matrix<uChar> flagtra; |
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168 | Complex xCalFctr; |
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169 | Vector<Complex> xPol; |
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170 | uInt n = seq.size(); |
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171 | |
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172 | uInt stepsize = header_.nif*header_.nbeam; |
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173 | uInt seqi = 0; |
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174 | Bool getAll = False; |
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175 | if (seq[n-1] == -1) getAll = True; |
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176 | while ( (cursor_ <= seq[n-1]) || getAll) { |
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177 | // only needs to be create if in seq |
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178 | SDContainer sc(header_.nbeam,header_.nif,header_.npol,header_.nchan); |
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179 | // iterate over one correlator integration cycle = nBeam*nIF |
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180 | for (uInt row=0; row < stepsize; row++) { |
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181 | // stepsize as well |
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182 | // spectra(nChan,nPol)!!! |
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183 | status = reader_->read(scanNo, cycleNo, mjd, interval, fieldName, |
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184 | srcName, srcDir, srcPM, srcVel, IFno, refFreq, |
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185 | bandwidth, freqInc, restFreq, tcal, tcalTime, |
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186 | azimuth, elevation, parAngle, focusAxi, |
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187 | focusTan, focusRot, temperature, pressure, |
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188 | humidity, windSpeed, windAz, refBeam, |
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189 | beamNo, direction, scanRate, |
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190 | tsys, sigma, calFctr, baseLin, baseSub, |
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191 | spectra, flagtra, xCalFctr, xPol); |
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192 | if (status) { |
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193 | if (status == -1) { |
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194 | // EOF. |
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195 | if (row > 0 && row < stepsize-1) |
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196 | cerr << "incomplete scan data.\n Probably means not all Beams/IFs/Pols within a scan are present." << endl; |
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197 | //cerr << "EOF" << endl; |
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198 | table_->putSDFreqTable(frequencies_); |
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199 | return status; |
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200 | } |
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201 | } |
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202 | // if in the given list |
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203 | if (cursor_ == seq[seqi] || getAll) { |
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204 | // add integration cycle |
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205 | if (row==0) { |
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206 | //add invariant info: scanNo, mjd, interval, fieldName, |
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207 | //srcName, azimuth, elevation, parAngle, focusAxi, focusTan, |
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208 | //focusRot, temperature, pressure, humidity, windSpeed, |
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209 | //windAz srcDir, srcPM, srcVel |
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210 | sc.timestamp = mjd; |
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211 | sc.interval = interval; |
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212 | sc.sourcename = srcName; |
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213 | sc.fieldname = fieldName; |
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214 | sc.azimuth = azimuth; |
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215 | sc.elevation = elevation; |
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216 | } |
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217 | // add specific info |
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218 | // IFno beamNo are 1-relative |
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219 | // refPix = nChan/2+1 in Integer arith.! |
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220 | Int refPix = header_.nchan/2+1; |
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221 | Int frqslot = frequencies_.addFrequency(refPix, refFreq, freqInc); |
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222 | frequencies_.addRestFrequency(restFreq); |
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223 | sc.setFrequencyMap(frqslot,IFno-1); |
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224 | sc.tcal[0] = tcal[0];sc.tcal[1] = tcal[1]; |
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225 | sc.tcaltime = tcalTime; |
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226 | sc.parangle = parAngle; |
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227 | sc.refbeam = refBeam; |
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228 | sc.scanid = scanNo-1;//make it 0-based |
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229 | sc.setSpectrum(spectra, beamNo-1, IFno-1); |
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230 | sc.setFlags(flagtra, beamNo-1, IFno-1); |
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231 | sc.setTsys(tsys, beamNo-1, IFno-1); |
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232 | sc.setDirection(direction, beamNo-1); |
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233 | } |
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234 | } |
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235 | if (cursor_ == seq[seqi] || getAll) { |
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236 | // insert container into table/list |
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237 | table_->putSDContainer(sc); |
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238 | seqi++;// next in list |
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239 | } |
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240 | cursor_++;// increment position in file |
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241 | } |
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242 | table_->putSDFreqTable(frequencies_); |
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243 | return status; |
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244 | } |
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