1 | //# PKSFITSreader.cc: Class to read Parkes multibeam data from a FITS file. |
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2 | //#--------------------------------------------------------------------------- |
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3 | //# Copyright (C) 2000-2008 |
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4 | //# Associated Universities, Inc. Washington DC, USA. |
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5 | //# |
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6 | //# This library is free software; you can redistribute it and/or modify it |
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7 | //# under the terms of the GNU Library General Public License as published by |
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8 | //# the Free Software Foundation; either version 2 of the License, or (at your |
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9 | //# option) any later version. |
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10 | //# |
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11 | //# This library is distributed in the hope that it will be useful, but |
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12 | //# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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13 | //# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
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14 | //# License for more details. |
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15 | //# |
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16 | //# You should have received a copy of the GNU Library General Public License |
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17 | //# along with this library; if not, write to the Free Software Foundation, |
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18 | //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
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19 | //# |
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20 | //# Correspondence concerning AIPS++ should be addressed as follows: |
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21 | //# Internet email: aips2-request@nrao.edu. |
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22 | //# Postal address: AIPS++ Project Office |
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23 | //# National Radio Astronomy Observatory |
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24 | //# 520 Edgemont Road |
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25 | //# Charlottesville, VA 22903-2475 USA |
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26 | //# |
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27 | //# $Id: PKSFITSreader.cc,v 19.14 2008-06-26 02:07:21 cal103 Exp $ |
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28 | //#--------------------------------------------------------------------------- |
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29 | //# Original: 2000/08/02, Mark Calabretta, ATNF |
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30 | //#--------------------------------------------------------------------------- |
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31 | |
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32 | #include <atnf/PKSIO/MBFITSreader.h> |
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33 | #include <atnf/PKSIO/SDFITSreader.h> |
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34 | #include <atnf/PKSIO/PKSFITSreader.h> |
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35 | #include <atnf/PKSIO/PKSMBrecord.h> |
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36 | |
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37 | #include <casa/Arrays/Array.h> |
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38 | #include <casa/BasicMath/Math.h> |
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39 | #include <casa/Quanta/MVTime.h> |
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40 | |
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41 | #include <casa/stdio.h> |
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42 | |
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43 | //----------------------------------------------- PKSFITSreader::PKSFITSreader |
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44 | |
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45 | // Constructor sets the method of position interpolation. |
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46 | |
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47 | PKSFITSreader::PKSFITSreader( |
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48 | const String fitsType, |
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49 | const Int retry, |
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50 | const Bool interpolate) |
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51 | { |
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52 | cFITSMBrec.setNIFs(1); |
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53 | |
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54 | if (fitsType == "SDFITS") { |
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55 | cReader = new SDFITSreader(); |
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56 | } else { |
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57 | cReader = new MBFITSreader(retry, interpolate ? 1 : 0); |
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58 | } |
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59 | } |
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60 | |
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61 | //---------------------------------------------- PKSFITSreader::~PKSFITSreader |
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62 | |
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63 | // Destructor. |
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64 | |
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65 | PKSFITSreader::~PKSFITSreader() |
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66 | { |
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67 | close(); |
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68 | delete cReader; |
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69 | } |
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70 | |
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71 | //-------------------------------------------------------- PKSFITSreader::open |
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72 | |
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73 | // Open the FITS file for reading. |
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74 | |
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75 | Int PKSFITSreader::open( |
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76 | const String fitsName, |
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77 | Vector<Bool> &beams, |
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78 | Vector<Bool> &IFs, |
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79 | Vector<uInt> &nChan, |
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80 | Vector<uInt> &nPol, |
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81 | Vector<Bool> &haveXPol, |
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82 | Bool &haveBase, |
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83 | Bool &haveSpectra) |
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84 | { |
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85 | int extraSysCal, haveBase_, *haveXPol_, haveSpectra_, nBeam, *nChan_, |
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86 | nIF, *nPol_, status; |
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87 | if ((status = cReader->open((char *)fitsName.chars(), nBeam, cBeams, nIF, |
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88 | cIFs, nChan_, nPol_, haveXPol_, haveBase_, |
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89 | haveSpectra_, extraSysCal))) { |
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90 | return status; |
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91 | } |
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92 | |
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93 | // Beams present in data. |
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94 | beams.resize(nBeam); |
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95 | for (Int ibeam = 0; ibeam < nBeam; ibeam++) { |
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96 | beams(ibeam) = cBeams[ibeam]; |
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97 | } |
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98 | |
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99 | // IFs, channels, and polarizations present in data. |
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100 | IFs.resize(nIF); |
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101 | nChan.resize(nIF); |
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102 | nPol.resize(nIF); |
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103 | haveXPol.resize(nIF); |
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104 | |
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105 | for (Int iIF = 0; iIF < nIF; iIF++) { |
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106 | IFs(iIF) = cIFs[iIF]; |
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107 | nChan(iIF) = nChan_[iIF]; |
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108 | nPol(iIF) = nPol_[iIF]; |
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109 | |
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110 | // Cross-polarization data present? |
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111 | haveXPol(iIF) = haveXPol_[iIF]; |
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112 | } |
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113 | |
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114 | cNBeam = nBeam; |
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115 | cNIF = nIF; |
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116 | cNChan.assign(nChan); |
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117 | cNPol.assign(nPol); |
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118 | cHaveXPol.assign(haveXPol); |
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119 | |
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120 | // Baseline parameters present? |
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121 | haveBase = haveBase_; |
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122 | |
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123 | // Spectral data present? |
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124 | haveSpectra = haveSpectra_; |
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125 | |
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126 | return 0; |
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127 | } |
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128 | |
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129 | //--------------------------------------------------- PKSFITSreader::getHeader |
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130 | |
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131 | // Get parameters describing the data. |
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132 | |
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133 | Int PKSFITSreader::getHeader( |
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134 | String &observer, |
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135 | String &project, |
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136 | String &antName, |
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137 | Vector<Double> &antPosition, |
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138 | String &obsType, |
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139 | String &bunit, |
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140 | Float &equinox, |
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141 | String &dopplerFrame, |
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142 | Double &mjd, |
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143 | Double &refFreq, |
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144 | Double &bandwidth) |
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145 | { |
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146 | char bunit_[32], datobs[32], dopplerFrame_[32], observer_[32], |
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147 | obsType_[32], project_[32], radecsys[32], telescope[32]; |
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148 | float equinox_; |
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149 | double antPos[3], utc; |
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150 | |
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151 | if (cReader->getHeader(observer_, project_, telescope, antPos, obsType_, |
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152 | bunit_, equinox_, radecsys, dopplerFrame_, |
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153 | datobs, utc, refFreq, bandwidth)) { |
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154 | return 1; |
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155 | } |
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156 | |
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157 | observer = trim(observer_); |
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158 | project = trim(project_); |
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159 | antName = trim(telescope); |
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160 | antPosition.resize(3); |
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161 | antPosition(0) = antPos[0]; |
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162 | antPosition(1) = antPos[1]; |
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163 | antPosition(2) = antPos[2]; |
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164 | obsType = trim(obsType_); |
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165 | bunit = trim(bunit_); |
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166 | equinox = equinox_; |
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167 | dopplerFrame = trim(dopplerFrame_); |
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168 | |
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169 | // Get UTC in MJD form. |
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170 | Int day, month, year; |
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171 | sscanf(datobs, "%4d-%2d-%2d", &year, &month, &day); |
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172 | MVTime date(year, month, Double(day)); |
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173 | mjd = date.day() + utc/86400.0; |
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174 | |
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175 | return 0; |
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176 | } |
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177 | |
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178 | //------------------------------------------------- PKSFITSreader::getFreqInfo |
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179 | |
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180 | // Get frequency parameters for each IF. |
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181 | |
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182 | Int PKSFITSreader::getFreqInfo( |
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183 | Vector<Double> &startFreq, |
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184 | Vector<Double> &endFreq) |
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185 | { |
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186 | int nIF; |
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187 | double *startfreq, *endfreq; |
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188 | |
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189 | Int status; |
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190 | if (!(status = cReader->getFreqInfo(nIF, startfreq, endfreq))) { |
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191 | startFreq.takeStorage(IPosition(1,nIF), startfreq, TAKE_OVER); |
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192 | endFreq.takeStorage(IPosition(1,nIF), endfreq, TAKE_OVER); |
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193 | } |
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194 | |
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195 | return status; |
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196 | } |
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197 | |
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198 | //------------------------------------------------------ PKSFITSreader::select |
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199 | |
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200 | // Set data selection by beam number and channel. |
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201 | |
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202 | uInt PKSFITSreader::select( |
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203 | const Vector<Bool> beamSel, |
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204 | const Vector<Bool> IFsel, |
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205 | const Vector<Int> startChan, |
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206 | const Vector<Int> endChan, |
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207 | const Vector<Int> refChan, |
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208 | const Bool getSpectra, |
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209 | const Bool getXPol, |
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210 | const Bool getFeedPos) |
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211 | { |
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212 | // Apply beam selection. |
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213 | uInt nBeamSel = beamSel.nelements(); |
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214 | for (uInt ibeam = 0; ibeam < cNBeam; ibeam++) { |
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215 | // This modifies FITSreader::cBeams[]. |
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216 | if (ibeam < nBeamSel) { |
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217 | cBeams[ibeam] = cBeams[ibeam] && beamSel(ibeam); |
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218 | } else { |
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219 | cBeams[ibeam] = 0; |
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220 | } |
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221 | } |
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222 | |
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223 | // Apply IF selection. |
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224 | int *end = new int[cNIF]; |
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225 | int *ref = new int[cNIF]; |
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226 | int *start = new int[cNIF]; |
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227 | |
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228 | for (uInt iIF = 0; iIF < cNIF; iIF++) { |
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229 | // This modifies FITSreader::cIFs[]. |
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230 | if (iIF < IFsel.nelements()) { |
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231 | cIFs[iIF] = cIFs[iIF] && IFsel(iIF); |
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232 | } else { |
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233 | cIFs[iIF] = 0; |
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234 | } |
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235 | |
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236 | if (cIFs[iIF]) { |
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237 | if (iIF < startChan.nelements()) { |
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238 | start[iIF] = startChan(iIF); |
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239 | |
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240 | if (start[iIF] <= 0) { |
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241 | start[iIF] += cNChan(iIF); |
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242 | } else if (start[iIF] > Int(cNChan(iIF))) { |
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243 | start[iIF] = cNChan(iIF); |
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244 | } |
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245 | |
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246 | } else { |
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247 | start[iIF] = 1; |
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248 | } |
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249 | |
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250 | if (iIF < endChan.nelements()) { |
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251 | end[iIF] = endChan(iIF); |
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252 | |
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253 | if (end[iIF] <= 0) { |
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254 | end[iIF] += cNChan(iIF); |
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255 | } else if (end[iIF] > Int(cNChan(iIF))) { |
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256 | end[iIF] = cNChan(iIF); |
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257 | } |
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258 | |
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259 | } else { |
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260 | end[iIF] = cNChan(iIF); |
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261 | } |
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262 | |
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263 | if (iIF < refChan.nelements()) { |
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264 | ref[iIF] = refChan(iIF); |
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265 | } else { |
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266 | if (start[iIF] <= end[iIF]) { |
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267 | ref[iIF] = start[iIF] + (end[iIF] - start[iIF] + 1)/2; |
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268 | } else { |
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269 | ref[iIF] = start[iIF] - (start[iIF] - end[iIF] + 1)/2; |
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270 | } |
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271 | } |
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272 | } |
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273 | } |
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274 | |
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275 | cGetSpectra = getSpectra; |
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276 | cGetXPol = getXPol; |
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277 | cGetFeedPos = getFeedPos; |
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278 | |
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279 | uInt maxNChan = cReader->select(start, end, ref, cGetSpectra, cGetXPol, |
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280 | cGetFeedPos); |
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281 | |
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282 | delete [] end; |
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283 | delete [] ref; |
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284 | delete [] start; |
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285 | |
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286 | return maxNChan; |
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287 | } |
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288 | |
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289 | //--------------------------------------------------- PKSFITSreader::findRange |
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290 | |
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291 | // Read the TIME column. |
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292 | |
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293 | Int PKSFITSreader::findRange( |
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294 | Int &nRow, |
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295 | Int &nSel, |
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296 | Vector<Double> &timeSpan, |
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297 | Matrix<Double> &positions) |
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298 | { |
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299 | char dateSpan[2][32]; |
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300 | double utcSpan[2]; |
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301 | double* posns; |
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302 | |
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303 | Int status; |
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304 | if (!(status = cReader->findRange(nRow, nSel, dateSpan, utcSpan, posns))) { |
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305 | timeSpan.resize(2); |
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306 | |
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307 | Int day, month, year; |
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308 | sscanf(dateSpan[0], "%4d-%2d-%2d", &year, &month, &day); |
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309 | timeSpan(0) = MVTime(year, month, Double(day)).second() + utcSpan[0]; |
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310 | sscanf(dateSpan[1], "%4d-%2d-%2d", &year, &month, &day); |
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311 | timeSpan(1) = MVTime(year, month, Double(day)).second() + utcSpan[1]; |
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312 | |
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313 | positions.takeStorage(IPosition(2,2,nSel), posns, TAKE_OVER); |
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314 | } |
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315 | |
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316 | return status; |
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317 | } |
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318 | |
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319 | //-------------------------------------------------------- PKSFITSreader::read |
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320 | |
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321 | // Read the next data record. |
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322 | |
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323 | Int PKSFITSreader::read(MBrecord &MBrec) |
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324 | { |
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325 | Int status; |
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326 | |
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327 | if ((status = cReader->read(cFITSMBrec))) { |
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328 | if (status != -1) { |
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329 | status = 1; |
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330 | } |
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331 | |
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332 | return status; |
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333 | } |
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334 | |
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335 | |
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336 | uInt nChan = cFITSMBrec.nChan[0]; |
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337 | uInt nPol = cFITSMBrec.nPol[0]; |
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338 | |
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339 | MBrec.scanNo = cFITSMBrec.scanNo; |
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340 | MBrec.cycleNo = cFITSMBrec.cycleNo; |
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341 | |
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342 | // Extract MJD. |
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343 | Int day, month, year; |
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344 | sscanf(cFITSMBrec.datobs, "%4d-%2d-%2d", &year, &month, &day); |
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345 | MBrec.mjd = MVTime(year, month, Double(day)).day() + cFITSMBrec.utc/86400.0; |
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346 | |
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347 | MBrec.interval = cFITSMBrec.exposure; |
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348 | |
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349 | MBrec.fieldName = trim(cFITSMBrec.srcName); |
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350 | MBrec.srcName = MBrec.fieldName; |
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351 | |
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352 | MBrec.srcDir.resize(2); |
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353 | MBrec.srcDir(0) = cFITSMBrec.srcRA; |
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354 | MBrec.srcDir(1) = cFITSMBrec.srcDec; |
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355 | |
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356 | MBrec.srcPM.resize(2); |
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357 | MBrec.srcPM(0) = 0.0; |
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358 | MBrec.srcPM(1) = 0.0; |
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359 | MBrec.srcVel = 0.0; |
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360 | MBrec.obsType = trim(cFITSMBrec.obsType); |
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361 | |
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362 | MBrec.IFno = cFITSMBrec.IFno[0]; |
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363 | Double chanWidth = fabs(cFITSMBrec.fqDelt[0]); |
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364 | MBrec.refFreq = cFITSMBrec.fqRefVal[0]; |
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365 | MBrec.bandwidth = chanWidth * nChan; |
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366 | MBrec.freqInc = cFITSMBrec.fqDelt[0]; |
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367 | MBrec.restFreq = cFITSMBrec.restFreq; |
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368 | |
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369 | MBrec.tcal.resize(nPol); |
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370 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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371 | MBrec.tcal(ipol) = cFITSMBrec.tcal[0][ipol]; |
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372 | } |
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373 | MBrec.tcalTime = trim(cFITSMBrec.tcalTime); |
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374 | MBrec.azimuth = cFITSMBrec.azimuth; |
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375 | MBrec.elevation = cFITSMBrec.elevation; |
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376 | MBrec.parAngle = cFITSMBrec.parAngle; |
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377 | MBrec.focusAxi = cFITSMBrec.focusAxi; |
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378 | MBrec.focusTan = cFITSMBrec.focusTan; |
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379 | MBrec.focusRot = cFITSMBrec.focusRot; |
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380 | |
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381 | MBrec.temperature = cFITSMBrec.temp; |
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382 | MBrec.pressure = cFITSMBrec.pressure; |
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383 | MBrec.humidity = cFITSMBrec.humidity; |
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384 | MBrec.windSpeed = cFITSMBrec.windSpeed; |
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385 | MBrec.windAz = cFITSMBrec.windAz; |
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386 | |
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387 | MBrec.refBeam = cFITSMBrec.refBeam; |
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388 | MBrec.beamNo = cFITSMBrec.beamNo; |
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389 | |
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390 | MBrec.direction.resize(2); |
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391 | MBrec.direction(0) = cFITSMBrec.ra; |
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392 | MBrec.direction(1) = cFITSMBrec.dec; |
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393 | |
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394 | MBrec.scanRate.resize(2); |
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395 | MBrec.scanRate(0) = cFITSMBrec.raRate; |
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396 | MBrec.scanRate(1) = cFITSMBrec.decRate; |
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397 | MBrec.rateAge = cFITSMBrec.rateAge; |
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398 | MBrec.rateson = cFITSMBrec.rateson; |
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399 | |
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400 | MBrec.tsys.resize(nPol); |
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401 | MBrec.sigma.resize(nPol); |
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402 | MBrec.calFctr.resize(nPol); |
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403 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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404 | MBrec.tsys(ipol) = cFITSMBrec.tsys[0][ipol]; |
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405 | MBrec.sigma(ipol) = (MBrec.tsys(ipol) / 0.81) / |
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406 | sqrt(MBrec.interval * chanWidth); |
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407 | MBrec.calFctr(ipol) = cFITSMBrec.calfctr[0][ipol]; |
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408 | } |
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409 | |
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410 | if (cFITSMBrec.haveBase) { |
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411 | MBrec.baseLin.resize(2,nPol); |
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412 | MBrec.baseSub.resize(9,nPol); |
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413 | |
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414 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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415 | MBrec.baseLin(0,ipol) = cFITSMBrec.baseLin[0][ipol][0]; |
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416 | MBrec.baseLin(1,ipol) = cFITSMBrec.baseLin[0][ipol][1]; |
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417 | |
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418 | for (uInt j = 0; j < 9; j++) { |
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419 | MBrec.baseSub(j,ipol) = cFITSMBrec.baseSub[0][ipol][j]; |
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420 | } |
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421 | } |
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422 | |
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423 | } else { |
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424 | MBrec.baseLin.resize(0,0); |
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425 | MBrec.baseSub.resize(0,0); |
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426 | } |
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427 | |
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428 | if (cGetSpectra && cFITSMBrec.haveSpectra) { |
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429 | MBrec.spectra.resize(nChan,nPol); |
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430 | MBrec.spectra.takeStorage(IPosition(2,nChan,nPol), cFITSMBrec.spectra[0], |
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431 | SHARE); |
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432 | |
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433 | MBrec.flagged.resize(nChan,nPol); |
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434 | MBrec.flagged.takeStorage(IPosition(2,nChan,nPol), cFITSMBrec.flagged[0], |
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435 | SHARE); |
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436 | |
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437 | } else { |
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438 | MBrec.spectra.resize(0,0); |
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439 | MBrec.flagged.resize(0,0); |
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440 | } |
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441 | |
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442 | if (cGetXPol) { |
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443 | MBrec.xCalFctr = Complex(cFITSMBrec.xcalfctr[0][0], |
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444 | cFITSMBrec.xcalfctr[0][1]); |
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445 | MBrec.xPol.resize(nChan); |
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446 | MBrec.xPol.takeStorage(IPosition(1,nChan), (Complex *)cFITSMBrec.xpol[0], |
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447 | SHARE); |
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448 | } |
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449 | |
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450 | return 0; |
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451 | } |
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452 | |
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453 | //-------------------------------------------------------- PKSFITSreader::read |
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454 | |
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455 | // Read the next data record, just the basics. |
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456 | |
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457 | Int PKSFITSreader::read( |
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458 | Int &IFno, |
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459 | Vector<Float> &tsys, |
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460 | Vector<Float> &calFctr, |
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461 | Matrix<Float> &baseLin, |
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462 | Matrix<Float> &baseSub, |
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463 | Matrix<Float> &spectra, |
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464 | Matrix<uChar> &flagged) |
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465 | { |
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466 | Int status; |
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467 | |
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468 | if ((status = cReader->read(cFITSMBrec))) { |
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469 | if (status != -1) { |
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470 | status = 1; |
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471 | } |
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472 | |
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473 | return status; |
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474 | } |
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475 | |
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476 | IFno = cFITSMBrec.IFno[0]; |
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477 | |
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478 | uInt nChan = cFITSMBrec.nChan[0]; |
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479 | uInt nPol = cFITSMBrec.nPol[0]; |
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480 | |
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481 | tsys.resize(nPol); |
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482 | calFctr.resize(nPol); |
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483 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
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484 | tsys(ipol) = cFITSMBrec.tsys[0][ipol]; |
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485 | calFctr(ipol) = cFITSMBrec.calfctr[0][ipol]; |
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486 | } |
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487 | |
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488 | if (cFITSMBrec.haveBase) { |
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489 | baseLin.resize(2,nPol); |
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490 | baseSub.resize(9,nPol); |
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491 | |
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492 | for (uInt ipol = 0; ipol < nPol; ipol++) { |
---|
493 | baseLin(0,ipol) = cFITSMBrec.baseLin[0][ipol][0]; |
---|
494 | baseLin(1,ipol) = cFITSMBrec.baseLin[0][ipol][1]; |
---|
495 | |
---|
496 | for (uInt j = 0; j < 9; j++) { |
---|
497 | baseSub(j,ipol) = cFITSMBrec.baseSub[0][ipol][j]; |
---|
498 | } |
---|
499 | } |
---|
500 | |
---|
501 | } else { |
---|
502 | baseLin.resize(0,0); |
---|
503 | baseSub.resize(0,0); |
---|
504 | } |
---|
505 | |
---|
506 | if (cGetSpectra && cFITSMBrec.haveSpectra) { |
---|
507 | spectra.resize(nChan,nPol); |
---|
508 | spectra.takeStorage(IPosition(2,nChan,nPol), cFITSMBrec.spectra[0], |
---|
509 | SHARE); |
---|
510 | |
---|
511 | flagged.resize(nChan,nPol); |
---|
512 | flagged.takeStorage(IPosition(2,nChan,nPol), cFITSMBrec.flagged[0], |
---|
513 | SHARE); |
---|
514 | |
---|
515 | } else { |
---|
516 | spectra.resize(0,0); |
---|
517 | flagged.resize(0,0); |
---|
518 | } |
---|
519 | |
---|
520 | return 0; |
---|
521 | } |
---|
522 | |
---|
523 | //------------------------------------------------------- PKSFITSreader::close |
---|
524 | |
---|
525 | // Close the FITS file. |
---|
526 | |
---|
527 | void PKSFITSreader::close() |
---|
528 | { |
---|
529 | cReader->close(); |
---|
530 | } |
---|
531 | |
---|
532 | //-------------------------------------------------------- PKSFITSreader::trim |
---|
533 | |
---|
534 | // Trim trailing blanks from a null-terminated character string. |
---|
535 | |
---|
536 | char* PKSFITSreader::trim(char *string) |
---|
537 | { |
---|
538 | int j = 0, k = 0; |
---|
539 | while (string[j] != '\0') { |
---|
540 | if (string[j++] != ' ') { |
---|
541 | k = j; |
---|
542 | } |
---|
543 | } |
---|
544 | |
---|
545 | string[k] = '\0'; |
---|
546 | |
---|
547 | return string; |
---|
548 | } |
---|