1 | //#--------------------------------------------------------------------------- |
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2 | //# SDFITSreader.cc: ATNF CFITSIO interface class for SDFITS input. |
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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 WITHOUT |
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13 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 | //# 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 this software 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 | //# The SDFITSreader class reads single dish FITS files such as those written |
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31 | //# by SDFITSwriter containing Parkes Multibeam data. |
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32 | //# |
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33 | //# Original: 2000/08/09, Mark Calabretta, ATNF |
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34 | //#--------------------------------------------------------------------------- |
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35 | |
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36 | #include <algorithm> |
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37 | #include <strings.h> |
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38 | |
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39 | // AIPS++ includes. |
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40 | #include <casa/iostream.h> |
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41 | #include <casa/math.h> |
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42 | #include <casa/stdio.h> |
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43 | |
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44 | // ATNF includes. |
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45 | #include <atnf/pks/pks_maths.h> |
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46 | #include <atnf/PKSIO/PKSMBrecord.h> |
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47 | #include <atnf/PKSIO/SDFITSreader.h> |
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48 | |
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49 | |
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50 | class FITSparm |
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51 | { |
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52 | public: |
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53 | char *name; // Keyword or column name. |
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54 | int type; // Expected keyvalue or column data type. |
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55 | int colnum; // Column number; 0 for keyword; -1 absent. |
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56 | int coltype; // Column data type, as found. |
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57 | long nelem; // Column data repeat count; < 0 for vardim. |
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58 | int tdimcol; // TDIM column number; 0 for keyword; -1 absent. |
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59 | }; |
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60 | |
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61 | // Numerical constants. |
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62 | const double PI = 3.141592653589793238462643; |
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63 | |
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64 | // Factor to convert radians to degrees. |
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65 | const double D2R = PI / 180.0; |
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66 | |
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67 | //------------------------------------------------- SDFITSreader::SDFITSreader |
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68 | |
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69 | SDFITSreader::SDFITSreader() |
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70 | { |
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71 | // Default constructor. |
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72 | cSDptr = 0; |
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73 | |
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74 | // Allocate space for data descriptors. |
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75 | cData = new FITSparm[NDATA]; |
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76 | |
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77 | for (int iData = 0; iData < NDATA; iData++) { |
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78 | cData[iData].colnum = -1; |
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79 | } |
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80 | |
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81 | // Initialize pointers. |
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82 | cBeams = 0x0; |
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83 | cIFs = 0x0; |
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84 | cStartChan = 0x0; |
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85 | cEndChan = 0x0; |
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86 | cRefChan = 0x0; |
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87 | } |
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88 | |
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89 | //------------------------------------------------ SDFITSreader::~SDFITSreader |
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90 | |
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91 | SDFITSreader::~SDFITSreader() |
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92 | { |
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93 | close(); |
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94 | |
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95 | delete [] cData; |
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96 | } |
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97 | |
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98 | //--------------------------------------------------------- SDFITSreader::open |
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99 | |
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100 | // Open an SDFITS file for reading. |
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101 | |
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102 | int SDFITSreader::open( |
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103 | char* sdName, |
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104 | int &nBeam, |
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105 | int* &beams, |
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106 | int &nIF, |
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107 | int* &IFs, |
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108 | int* &nChan, |
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109 | int* &nPol, |
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110 | int* &haveXPol, |
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111 | int &haveBase, |
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112 | int &haveSpectra, |
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113 | int &extraSysCal) |
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114 | { |
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115 | if (cSDptr) { |
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116 | close(); |
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117 | } |
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118 | |
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119 | // Open the SDFITS file. |
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120 | cStatus = 0; |
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121 | if (fits_open_file(&cSDptr, sdName, READONLY, &cStatus)) { |
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122 | cerr << "Failed to open SDFITS file: " << sdName << endl; |
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123 | reportError(); |
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124 | return 1; |
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125 | } |
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126 | |
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127 | // Move to the SDFITS extension. |
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128 | cALFA = cALFA_BD = cALFA_CIMA = 0; |
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129 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "SINGLE DISH", 0, &cStatus)) { |
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130 | // No SDFITS table, look for BDFITS or CIMAFITS. |
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131 | cStatus = 0; |
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132 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "BDFITS", 0, &cStatus) == 0) { |
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133 | cALFA_BD = 1; |
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134 | |
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135 | } else { |
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136 | cStatus = 0; |
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137 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "CIMAFITS", 0, &cStatus) == 0) { |
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138 | cALFA_CIMA = 1; |
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139 | |
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140 | } else { |
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141 | cerr << "Failed to locate SDFITS binary table." << endl; |
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142 | reportError(); |
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143 | close(); |
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144 | return 1; |
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145 | } |
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146 | } |
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147 | |
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148 | // Arecibo ALFA data of some kind. |
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149 | cALFA = 1; |
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150 | for (int iBeam = 0; iBeam < 8; iBeam++) { |
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151 | for (int iPol = 0; iPol < 2; iPol++) { |
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152 | cALFAcalOn[iBeam][iPol] = 0.0f; |
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153 | cALFAcalOff[iBeam][iPol] = 0.0f; |
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154 | |
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155 | // Nominal factor to calibrate spectra in Jy. |
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156 | cALFAcal[iBeam][iPol] = 3.0f; |
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157 | } |
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158 | } |
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159 | } |
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160 | |
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161 | // GBT data. |
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162 | char telescope[32]; |
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163 | readParm("TELESCOP", TSTRING, telescope); // Core. |
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164 | cGBT = strncmp(telescope, "GBT", 3) == 0 || |
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165 | strncmp(telescope, "NRAO_GBT", 8) == 0; |
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166 | |
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167 | cRow = 0; |
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168 | |
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169 | |
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170 | // Check that the DATA array column is present. |
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171 | findData(DATA, "DATA", TFLOAT); |
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172 | haveSpectra = cHaveSpectra = cData[DATA].colnum > 0; |
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173 | |
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174 | if (cHaveSpectra) { |
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175 | // Find the number of data axes (must be the same for each IF). |
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176 | cNAxis = 5; |
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177 | if (readDim(DATA, 1, &cNAxis, cNAxes)) { |
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178 | reportError(); |
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179 | close(); |
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180 | return 1; |
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181 | } |
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182 | |
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183 | if (cALFA_BD) { |
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184 | // ALFA BDFITS: variable length arrays don't actually vary and there is |
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185 | // no TDIM (or MAXISn) card; use the LAGS_IN value. |
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186 | cNAxis = 5; |
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187 | readParm("LAGS_IN", TLONG, cNAxes); |
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188 | cNAxes[1] = 1; |
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189 | cNAxes[2] = 1; |
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190 | cNAxes[3] = 1; |
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191 | cNAxes[4] = 1; |
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192 | cData[DATA].nelem = cNAxes[0]; |
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193 | } |
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194 | |
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195 | if (cNAxis < 4) { |
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196 | // Need at least four axes (for now). |
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197 | cerr << "DATA array contains fewer than four axes." << endl; |
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198 | close(); |
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199 | return 1; |
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200 | } else if (cNAxis > 5) { |
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201 | // We support up to five axes. |
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202 | cerr << "DATA array contains more than five axes." << endl; |
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203 | close(); |
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204 | return 1; |
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205 | } |
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206 | |
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207 | findData(FLAGGED, "FLAGGED", TBYTE); |
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208 | |
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209 | } else { |
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210 | // DATA column not present, check for a DATAXED keyword. |
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211 | findData(DATAXED, "DATAXED", TSTRING); |
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212 | if (cData[DATAXED].colnum < 0) { |
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213 | cerr << "DATA array column absent from binary table." << endl; |
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214 | close(); |
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215 | return 1; |
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216 | } |
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217 | |
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218 | // Determine the number of axes and their length. |
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219 | char dataxed[32]; |
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220 | readParm("DATAXED", TSTRING, dataxed); |
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221 | |
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222 | for (int iaxis = 0; iaxis < 5; iaxis++) cNAxes[iaxis] = 0; |
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223 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxes, cNAxes+1, cNAxes+2, |
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224 | cNAxes+3, cNAxes+4); |
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225 | for (int iaxis = 4; iaxis > -1; iaxis--) { |
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226 | if (cNAxes[iaxis] == 0) cNAxis = iaxis; |
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227 | } |
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228 | } |
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229 | |
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230 | char *CTYPE[5] = {"CTYPE1", "CTYPE2", "CTYPE3", "CTYPE4", "CTYPE5"}; |
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231 | char *CRPIX[5] = {"CRPIX1", "CRPIX2", "CRPIX3", "CRPIX4", "CRPIX5"}; |
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232 | char *CRVAL[5] = {"CRVAL1", "CRVAL2", "CRVAL3", "CRVAL4", "CRVAL5"}; |
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233 | char *CDELT[5] = {"CDELT1", "CDELT2", "CDELT3", "CDELT4", "CDELT5"}; |
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234 | |
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235 | // Find required DATA array axes. |
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236 | char ctype[5][72]; |
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237 | for (int iaxis = 0; iaxis < cNAxis; iaxis++) { |
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238 | strcpy(ctype[iaxis], ""); |
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239 | readParm(CTYPE[iaxis], TSTRING, ctype[iaxis]); // Core. |
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240 | } |
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241 | |
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242 | if (cStatus) { |
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243 | reportError(); |
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244 | close(); |
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245 | return 1; |
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246 | } |
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247 | |
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248 | char *fqCRPIX = 0; |
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249 | char *fqCRVAL = 0; |
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250 | char *fqCDELT = 0; |
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251 | char *raCRVAL = 0; |
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252 | char *decCRVAL = 0; |
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253 | char *timeCRVAL = 0; |
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254 | char *beamCRVAL = 0; |
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255 | |
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256 | for (int iaxis = 0; iaxis < cNAxis; iaxis++) { |
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257 | if (strncmp(ctype[iaxis], "FREQ", 4) == 0) { |
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258 | cReqax[0] = iaxis; |
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259 | fqCRPIX = CRPIX[iaxis]; |
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260 | fqCRVAL = CRVAL[iaxis]; |
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261 | fqCDELT = CDELT[iaxis]; |
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262 | |
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263 | } else if (strncmp(ctype[iaxis], "STOKES", 6) == 0) { |
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264 | cReqax[1] = iaxis; |
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265 | |
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266 | } else if (strncmp(ctype[iaxis], "RA", 2) == 0) { |
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267 | cReqax[2] = iaxis; |
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268 | raCRVAL = CRVAL[iaxis]; |
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269 | |
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270 | } else if (strncmp(ctype[iaxis], "DEC", 3) == 0) { |
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271 | cReqax[3] = iaxis; |
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272 | decCRVAL = CRVAL[iaxis]; |
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273 | |
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274 | } else if (strcmp(ctype[iaxis], "TIME") == 0) { |
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275 | // TIME (UTC seconds since midnight) can be a keyword or axis type. |
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276 | timeCRVAL = CRVAL[iaxis]; |
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277 | |
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278 | } else if (strcmp(ctype[iaxis], "BEAM") == 0) { |
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279 | // BEAM can be a keyword or axis type. |
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280 | beamCRVAL = CRVAL[iaxis]; |
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281 | } |
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282 | } |
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283 | |
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284 | if (cALFA_BD) { |
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285 | // Fixed in ALFA CIMAFITS. |
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286 | cReqax[2] = 2; |
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287 | raCRVAL = "CRVAL2A"; |
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288 | |
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289 | cReqax[3] = 3; |
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290 | decCRVAL = "CRVAL3A"; |
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291 | } |
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292 | |
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293 | // Check that all are present. |
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294 | for (int iaxis = 0; iaxis < 4; iaxis++) { |
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295 | if (cReqax[iaxis] < 0) { |
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296 | cerr << "Could not find required DATA array axes." << endl; |
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297 | close(); |
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298 | return 1; |
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299 | } |
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300 | } |
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301 | |
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302 | // Set up machinery for data retrieval. |
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303 | findData(SCAN, "SCAN", TINT); // Shared. |
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304 | findData(CYCLE, "CYCLE", TINT); // Additional. |
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305 | findData(DATE_OBS, "DATE-OBS", TSTRING); // Core. |
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306 | findData(TIME, "TIME", TDOUBLE); // Core. |
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307 | findData(EXPOSURE, "EXPOSURE", TFLOAT); // Core. |
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308 | findData(OBJECT, "OBJECT", TSTRING); // Core. |
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309 | findData(OBJ_RA, "OBJ-RA", TDOUBLE); // Additional. |
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310 | findData(OBJ_DEC, "OBJ-DEC", TDOUBLE); // Additional. |
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311 | findData(RESTFRQ, "RESTFRQ", TDOUBLE); // Additional. |
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312 | findData(OBSMODE, "OBSMODE", TSTRING); // Shared. |
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313 | |
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314 | findData(BEAM, "BEAM", TSHORT); // Additional. |
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315 | findData(IF, "IF", TSHORT); // Additional. |
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316 | findData(FqRefPix, fqCRPIX, TFLOAT); // Frequency reference pixel. |
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317 | findData(FqRefVal, fqCRVAL, TDOUBLE); // Frequency reference value. |
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318 | findData(FqDelt, fqCDELT, TDOUBLE); // Frequency increment. |
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319 | findData(RA, raCRVAL, TDOUBLE); // Right ascension. |
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320 | findData(DEC, decCRVAL, TDOUBLE); // Declination. |
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321 | findData(SCANRATE, "SCANRATE", TFLOAT); // Additional. |
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322 | |
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323 | findData(TSYS, "TSYS", TFLOAT); // Core. |
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324 | findData(CALFCTR, "CALFCTR", TFLOAT); // Additional. |
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325 | findData(XCALFCTR, "XCALFCTR", TFLOAT); // Additional. |
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326 | findData(BASELIN, "BASELIN", TFLOAT); // Additional. |
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327 | findData(BASESUB, "BASESUB", TFLOAT); // Additional. |
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328 | findData(XPOLDATA, "XPOLDATA", TFLOAT); // Additional. |
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329 | |
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330 | findData(REFBEAM, "REFBEAM", TSHORT); // Additional. |
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331 | findData(TCAL, "TCAL", TFLOAT); // Shared. |
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332 | findData(TCALTIME, "TCALTIME", TSTRING); // Additional. |
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333 | findData(AZIMUTH, "AZIMUTH", TFLOAT); // Shared. |
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334 | findData(ELEVATIO, "ELEVATIO", TFLOAT); // Shared. |
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335 | findData(PARANGLE, "PARANGLE", TFLOAT); // Additional. |
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336 | findData(FOCUSAXI, "FOCUSAXI", TFLOAT); // Additional. |
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337 | findData(FOCUSTAN, "FOCUSTAN", TFLOAT); // Additional. |
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338 | findData(FOCUSROT, "FOCUSROT", TFLOAT); // Additional. |
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339 | findData(TAMBIENT, "TAMBIENT", TFLOAT); // Shared. |
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340 | findData(PRESSURE, "PRESSURE", TFLOAT); // Shared. |
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341 | findData(HUMIDITY, "HUMIDITY", TFLOAT); // Shared. |
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342 | findData(WINDSPEE, "WINDSPEE", TFLOAT); // Shared. |
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343 | findData(WINDDIRE, "WINDDIRE", TFLOAT); // Shared. |
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344 | |
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345 | if (cStatus) { |
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346 | reportError(); |
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347 | close(); |
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348 | return 1; |
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349 | } |
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350 | |
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351 | |
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352 | // Check for alternative column names. |
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353 | if (cALFA) { |
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354 | // ALFA data. |
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355 | cALFAscan = 0; |
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356 | cScanNo = 0; |
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357 | if (cALFA_BD) { |
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358 | findData(SCAN, "SCAN_NUMBER", TINT); |
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359 | findData(CYCLE, "PATTERN_NUMBER", TINT); |
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360 | } else if (cALFA_CIMA) { |
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361 | findData(SCAN, "SCAN_ID", TINT); |
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362 | findData(CYCLE, "SUBSCAN", TINT); |
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363 | } |
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364 | } else { |
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365 | readData(SCAN, 1, &cFirstScanNo); |
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366 | } |
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367 | |
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368 | cCycleNo = 0; |
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369 | cLastUTC = 0.0; |
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370 | |
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371 | // Beam number, 1-relative by default. |
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372 | cBeam_1rel = 1; |
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373 | if (cData[BEAM].colnum < 0) { |
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374 | if (beamCRVAL) { |
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375 | // There is a BEAM axis. |
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376 | findData(BEAM, beamCRVAL, TDOUBLE); |
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377 | |
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378 | } else { |
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379 | if (cALFA) { |
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380 | // ALFA data, 0-relative. |
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381 | findData(BEAM, "INPUT_ID", TSHORT); |
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382 | } else { |
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383 | // ms2sdfits output, 0-relative "feed" number. |
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384 | findData(BEAM, "MAIN_FEED1", TSHORT); |
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385 | } |
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386 | |
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387 | cBeam_1rel = 0; |
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388 | } |
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389 | } |
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390 | |
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391 | // IF number, 1-relative by default. |
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392 | cIF_1rel = 1; |
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393 | if (cALFA && cData[IF].colnum < 0) { |
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394 | // ALFA data, 0-relative. |
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395 | findData(IF, "IFVAL", TSHORT); |
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396 | cIF_1rel = 0; |
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397 | } |
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398 | |
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399 | if (cData[TIME].colnum < 0) { |
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400 | if (timeCRVAL) { |
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401 | // There is a TIME axis. |
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402 | findData(TIME, timeCRVAL, TDOUBLE); |
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403 | } |
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404 | } |
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405 | |
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406 | // ms2sdfits writes a scalar "TSYS" column that averages the polarizations. |
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407 | int colnum; |
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408 | findCol("SYSCAL_TSYS", &colnum); |
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409 | if (colnum > 0) { |
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410 | // This contains the vector Tsys. |
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411 | findData(TSYS, "SYSCAL_TSYS", TFLOAT); |
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412 | } |
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413 | |
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414 | // XPOLDATA? |
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415 | |
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416 | if (cData[SCANRATE].colnum < 0) { |
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417 | findData(SCANRATE, "FIELD_POINTING_DIR_RATE", TFLOAT); |
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418 | } |
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419 | |
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420 | if (cData[RESTFRQ].colnum < 0) { |
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421 | findData(RESTFRQ, "RESTFREQ", TDOUBLE); |
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422 | if (cData[RESTFRQ].colnum < 0) { |
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423 | findData(RESTFRQ, "SPECTRAL_WINDOW_REST_FREQUENCY", TDOUBLE); |
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424 | } |
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425 | } |
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426 | |
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427 | if (cData[OBJ_RA].colnum < 0) { |
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428 | findData(OBJ_RA, "SOURCE_DIRECTION", TDOUBLE); |
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429 | } |
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430 | if (cData[OBJ_DEC].colnum < 0) { |
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431 | findData(OBJ_DEC, "SOURCE_DIRECTION", TDOUBLE); |
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432 | } |
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433 | |
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434 | // REFBEAM? |
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435 | |
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436 | if (cData[TCAL].colnum < 0) { |
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437 | findData(TCAL, "SYSCAL_TCAL", TFLOAT); |
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438 | } else if (cALFA_BD) { |
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439 | // ALFA BDFITS has a different TCAL with 64 elements - kill it! |
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440 | findData(TCAL, "NO NO NO", TFLOAT); |
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441 | } |
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442 | |
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443 | if (cALFA_BD) { |
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444 | // ALFA BDFITS. |
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445 | findData(AZIMUTH, "CRVAL2B", TFLOAT); |
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446 | findData(ELEVATIO, "CRVAL3B", TFLOAT); |
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447 | } |
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448 | |
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449 | if (cALFA) { |
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450 | // ALFA data. |
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451 | findData(PARANGLE, "PARA_ANG", TFLOAT); |
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452 | } |
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453 | |
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454 | if (cData[TAMBIENT].colnum < 0) { |
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455 | findData(TAMBIENT, "WEATHER_TEMPERATURE", TFLOAT); |
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456 | } |
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457 | |
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458 | if (cData[PRESSURE].colnum < 0) { |
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459 | findData(PRESSURE, "WEATHER_PRESSURE", TFLOAT); |
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460 | } |
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461 | |
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462 | if (cData[HUMIDITY].colnum < 0) { |
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463 | findData(HUMIDITY, "WEATHER_REL_HUMIDITY", TFLOAT); |
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464 | } |
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465 | |
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466 | if (cData[WINDSPEE].colnum < 0) { |
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467 | findData(WINDSPEE, "WEATHER_WIND_SPEED", TFLOAT); |
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468 | } |
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469 | |
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470 | if (cData[WINDDIRE].colnum < 0) { |
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471 | findData(WINDDIRE, "WEATHER_WIND_DIRECTION", TFLOAT); |
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472 | } |
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473 | |
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474 | |
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475 | // Find the number of rows. |
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476 | fits_get_num_rows(cSDptr, &cNRow, &cStatus); |
---|
477 | if (!cNRow) { |
---|
478 | cerr << "Table contains no entries." << endl; |
---|
479 | close(); |
---|
480 | return 1; |
---|
481 | } |
---|
482 | |
---|
483 | |
---|
484 | // Determine which beams are present in the data. |
---|
485 | if (cData[BEAM].colnum > 0) { |
---|
486 | short *beamCol = new short[cNRow]; |
---|
487 | short beamNul = 1; |
---|
488 | int anynul; |
---|
489 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
490 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
491 | reportError(); |
---|
492 | delete [] beamCol; |
---|
493 | close(); |
---|
494 | return 1; |
---|
495 | } |
---|
496 | |
---|
497 | // Find the maximum beam number. |
---|
498 | cNBeam = cBeam_1rel - 1; |
---|
499 | for (int irow = 0; irow < cNRow; irow++) { |
---|
500 | if (beamCol[irow] > cNBeam) { |
---|
501 | cNBeam = beamCol[irow]; |
---|
502 | } |
---|
503 | |
---|
504 | // Check validity. |
---|
505 | if (beamCol[irow] < cBeam_1rel) { |
---|
506 | cerr << "SDFITS file contains invalid beam number." << endl; |
---|
507 | delete [] beamCol; |
---|
508 | close(); |
---|
509 | return 1; |
---|
510 | } |
---|
511 | } |
---|
512 | |
---|
513 | if (!cBeam_1rel) cNBeam++; |
---|
514 | |
---|
515 | // Find all beams present in the data. |
---|
516 | cBeams = new int[cNBeam]; |
---|
517 | for (int ibeam = 0; ibeam < cNBeam; ibeam++) { |
---|
518 | cBeams[ibeam] = 0; |
---|
519 | } |
---|
520 | |
---|
521 | for (int irow = 0; irow < cNRow; irow++) { |
---|
522 | cBeams[beamCol[irow] - cBeam_1rel] = 1; |
---|
523 | } |
---|
524 | |
---|
525 | delete [] beamCol; |
---|
526 | |
---|
527 | } else { |
---|
528 | // No BEAM column. |
---|
529 | cNBeam = 1; |
---|
530 | cBeams = new int[1]; |
---|
531 | cBeams[0] = 1; |
---|
532 | } |
---|
533 | |
---|
534 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
535 | // modify its elements directly. |
---|
536 | nBeam = cNBeam; |
---|
537 | beams = cBeams; |
---|
538 | |
---|
539 | |
---|
540 | // Determine which IFs are present in the data. |
---|
541 | if (cData[IF].colnum > 0) { |
---|
542 | short *IFCol = new short[cNRow]; |
---|
543 | short IFNul = 1; |
---|
544 | int anynul; |
---|
545 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
546 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
547 | reportError(); |
---|
548 | delete [] IFCol; |
---|
549 | close(); |
---|
550 | return 1; |
---|
551 | } |
---|
552 | |
---|
553 | // Find the maximum IF number. |
---|
554 | cNIF = cIF_1rel - 1; |
---|
555 | for (int irow = 0; irow < cNRow; irow++) { |
---|
556 | if (IFCol[irow] > cNIF) { |
---|
557 | cNIF = IFCol[irow]; |
---|
558 | } |
---|
559 | |
---|
560 | // Check validity. |
---|
561 | if (IFCol[irow] < cIF_1rel) { |
---|
562 | cerr << "SDFITS file contains invalid IF number." << endl; |
---|
563 | delete [] IFCol; |
---|
564 | close(); |
---|
565 | return 1; |
---|
566 | } |
---|
567 | } |
---|
568 | |
---|
569 | if (!cIF_1rel) cNIF++; |
---|
570 | |
---|
571 | // Find all IFs present in the data. |
---|
572 | cIFs = new int[cNIF]; |
---|
573 | cNChan = new int[cNIF]; |
---|
574 | cNPol = new int[cNIF]; |
---|
575 | cHaveXPol = new int[cNIF]; |
---|
576 | cGetXPol = 0; |
---|
577 | |
---|
578 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
579 | cIFs[iIF] = 0; |
---|
580 | cNChan[iIF] = 0; |
---|
581 | cNPol[iIF] = 0; |
---|
582 | cHaveXPol[iIF] = 0; |
---|
583 | } |
---|
584 | |
---|
585 | for (int irow = 0; irow < cNRow; irow++) { |
---|
586 | int iIF = IFCol[irow] - cIF_1rel; |
---|
587 | if (cIFs[iIF] == 0) { |
---|
588 | cIFs[iIF] = 1; |
---|
589 | |
---|
590 | // Find the axis lengths. |
---|
591 | if (cHaveSpectra) { |
---|
592 | if (cData[DATA].nelem < 0) { |
---|
593 | // Variable dimension array. |
---|
594 | if (readDim(DATA, irow+1, &cNAxis, cNAxes)) { |
---|
595 | reportError(); |
---|
596 | close(); |
---|
597 | return 1; |
---|
598 | } |
---|
599 | } |
---|
600 | |
---|
601 | } else { |
---|
602 | if (cData[DATAXED].colnum > 0) { |
---|
603 | char dataxed[32]; |
---|
604 | readParm("DATAXED", TSTRING, dataxed); |
---|
605 | |
---|
606 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxes, cNAxes+1, |
---|
607 | cNAxes+2, cNAxes+3, cNAxes+4); |
---|
608 | } |
---|
609 | } |
---|
610 | |
---|
611 | // Number of channels and polarizations. |
---|
612 | cNChan[iIF] = cNAxes[cReqax[0]]; |
---|
613 | cNPol[iIF] = cNAxes[cReqax[1]]; |
---|
614 | cHaveXPol[iIF] = 0; |
---|
615 | |
---|
616 | // Is cross-polarization data present? |
---|
617 | if (cData[XPOLDATA].colnum > 0) { |
---|
618 | // Check that it conforms. |
---|
619 | int nAxis; |
---|
620 | long nAxes[2]; |
---|
621 | |
---|
622 | if (readDim(XPOLDATA, irow+1, &nAxis, nAxes)) { |
---|
623 | reportError(); |
---|
624 | close(); |
---|
625 | return 1; |
---|
626 | } |
---|
627 | |
---|
628 | // Default is to get it if we have it. |
---|
629 | if (nAxis == 2 && |
---|
630 | nAxes[0] == 2 && |
---|
631 | nAxes[1] == cNChan[iIF]) { |
---|
632 | cGetXPol = cHaveXPol[iIF] = 1; |
---|
633 | } |
---|
634 | } |
---|
635 | } |
---|
636 | } |
---|
637 | |
---|
638 | delete [] IFCol; |
---|
639 | |
---|
640 | } else { |
---|
641 | // No IF column. |
---|
642 | cNIF = 1; |
---|
643 | cIFs = new int[1]; |
---|
644 | cIFs[0] = 1; |
---|
645 | |
---|
646 | cNChan = new int[1]; |
---|
647 | cNPol = new int[1]; |
---|
648 | cHaveXPol = new int[1]; |
---|
649 | cGetXPol = 0; |
---|
650 | |
---|
651 | // Number of channels and polarizations. |
---|
652 | cNChan[0] = cNAxes[cReqax[0]]; |
---|
653 | cNPol[0] = cNAxes[cReqax[1]]; |
---|
654 | cHaveXPol[0] = 0; |
---|
655 | } |
---|
656 | |
---|
657 | if (cALFA) { |
---|
658 | // ALFA labels each polarization as a separate IF. |
---|
659 | cNPol[0] = cNIF; |
---|
660 | cNIF = 1; |
---|
661 | } |
---|
662 | |
---|
663 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
664 | // modify its elements directly. |
---|
665 | nIF = cNIF; |
---|
666 | IFs = cIFs; |
---|
667 | |
---|
668 | nChan = cNChan; |
---|
669 | nPol = cNPol; |
---|
670 | haveXPol = cHaveXPol; |
---|
671 | |
---|
672 | |
---|
673 | // Default channel range selection. |
---|
674 | cStartChan = new int[cNIF]; |
---|
675 | cEndChan = new int[cNIF]; |
---|
676 | cRefChan = new int[cNIF]; |
---|
677 | |
---|
678 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
679 | cStartChan[iIF] = 1; |
---|
680 | cEndChan[iIF] = cNChan[iIF]; |
---|
681 | cRefChan[iIF] = cNChan[iIF]/2 + 1; |
---|
682 | } |
---|
683 | |
---|
684 | // Default is to get it if we have it. |
---|
685 | cGetSpectra = cHaveSpectra; |
---|
686 | |
---|
687 | |
---|
688 | // Are baseline parameters present? |
---|
689 | cHaveBase = 0; |
---|
690 | if (cData[BASELIN].colnum) { |
---|
691 | // Check that it conforms. |
---|
692 | int nAxis, status = 0; |
---|
693 | long nAxes[2]; |
---|
694 | |
---|
695 | if (fits_read_tdim(cSDptr, cData[BASELIN].colnum, 2, &nAxis, nAxes, |
---|
696 | &status) == 0) { |
---|
697 | cHaveBase = (nAxis == 2); |
---|
698 | } |
---|
699 | } |
---|
700 | haveBase = cHaveBase; |
---|
701 | |
---|
702 | |
---|
703 | // Is extra system calibration data available? |
---|
704 | cExtraSysCal = 0; |
---|
705 | for (int iparm = REFBEAM; iparm < NDATA; iparm++) { |
---|
706 | if (cData[iparm].colnum >= 0) { |
---|
707 | cExtraSysCal = 1; |
---|
708 | break; |
---|
709 | } |
---|
710 | } |
---|
711 | |
---|
712 | extraSysCal = cExtraSysCal; |
---|
713 | |
---|
714 | return 0; |
---|
715 | } |
---|
716 | |
---|
717 | //---------------------------------------------------- SDFITSreader::getHeader |
---|
718 | |
---|
719 | // Get parameters describing the data. |
---|
720 | |
---|
721 | int SDFITSreader::getHeader( |
---|
722 | char observer[32], |
---|
723 | char project[32], |
---|
724 | char telescope[32], |
---|
725 | double antPos[3], |
---|
726 | char obsMode[32], |
---|
727 | float &equinox, |
---|
728 | char radecsys[32], |
---|
729 | char dopplerFrame[32], |
---|
730 | char datobs[32], |
---|
731 | double &utc, |
---|
732 | double &refFreq, |
---|
733 | double &bandwidth) |
---|
734 | { |
---|
735 | // Has the file been opened? |
---|
736 | if (!cSDptr) { |
---|
737 | return 1; |
---|
738 | } |
---|
739 | |
---|
740 | // Read parameter values. |
---|
741 | readParm("OBSERVER", TSTRING, observer); // Shared. |
---|
742 | readParm("PROJID", TSTRING, project); // Shared. |
---|
743 | readParm("TELESCOP", TSTRING, telescope); // Core. |
---|
744 | |
---|
745 | antPos[0] = 0.0; |
---|
746 | antPos[1] = 0.0; |
---|
747 | antPos[2] = 0.0; |
---|
748 | if (readParm("ANTENNA_POSITION", TDOUBLE, antPos)) { |
---|
749 | readParm("OBSGEO-X", TDOUBLE, antPos); // Additional. |
---|
750 | readParm("OBSGEO-Y", TDOUBLE, antPos + 1); // Additional. |
---|
751 | readParm("OBSGEO-Z", TDOUBLE, antPos + 2); // Additional. |
---|
752 | } |
---|
753 | |
---|
754 | if (antPos[0] == 0.0) { |
---|
755 | if (strncmp(telescope, "ATPKS", 5) == 0) { |
---|
756 | // Parkes coordinates. |
---|
757 | antPos[0] = -4554232.087; |
---|
758 | antPos[1] = 2816759.046; |
---|
759 | antPos[2] = -3454035.950; |
---|
760 | } else if (strncmp(telescope, "ATMOPRA", 7) == 0) { |
---|
761 | // Mopra coordinates. |
---|
762 | antPos[0] = -4682768.630; |
---|
763 | antPos[1] = 2802619.060; |
---|
764 | antPos[2] = -3291759.900; |
---|
765 | } else if (strncmp(telescope, "ARECIBO", 7) == 0) { |
---|
766 | // Arecibo coordinates. |
---|
767 | antPos[0] = 2390486.900; |
---|
768 | antPos[1] = -5564731.440; |
---|
769 | antPos[2] = 1994720.450; |
---|
770 | } |
---|
771 | } |
---|
772 | |
---|
773 | readData(OBSMODE, 1, obsMode); // Shared. |
---|
774 | |
---|
775 | readParm("EQUINOX", TFLOAT, &equinox); // Shared. |
---|
776 | if (cStatus == 405) { |
---|
777 | // EQUINOX was written as string value in early versions. |
---|
778 | cStatus = 0; |
---|
779 | char strtmp[32]; |
---|
780 | readParm("EQUINOX", TSTRING, strtmp); |
---|
781 | sscanf(strtmp, "%f", &equinox); |
---|
782 | } |
---|
783 | |
---|
784 | if (readParm("RADESYS", TSTRING, radecsys)) { // Additional. |
---|
785 | if (readParm("RADECSYS", TSTRING, radecsys)) { // Additional. |
---|
786 | strcpy(radecsys, ""); |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | if (readParm("SPECSYS", TSTRING, dopplerFrame)) { // Additional. |
---|
791 | // Fallback value. |
---|
792 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
793 | |
---|
794 | // Look for VELFRAME, written by earlier versions of Livedata. |
---|
795 | if (readParm("VELFRAME", TSTRING, dopplerFrame)) { // Additional. |
---|
796 | // No, try digging it out of the CTYPE card (AIPS convention). |
---|
797 | char keyw[9], ctype[9]; |
---|
798 | sprintf(keyw, "CTYPE%ld", cReqax[0]+1); |
---|
799 | readParm(keyw, TSTRING, ctype); |
---|
800 | |
---|
801 | if (strncmp(ctype, "FREQ-", 5) == 0) { |
---|
802 | strcpy(dopplerFrame, ctype+5); |
---|
803 | if (strcmp(dopplerFrame, "LSR") == 0) { |
---|
804 | // LSR unqualified usually means LSR (kinematic). |
---|
805 | strcpy(dopplerFrame, "LSRK"); |
---|
806 | } else if (strcmp(dopplerFrame, "HEL") == 0) { |
---|
807 | // Almost certainly barycentric. |
---|
808 | strcpy(dopplerFrame, "BARYCENT"); |
---|
809 | } |
---|
810 | } else { |
---|
811 | strcpy(dopplerFrame, ""); |
---|
812 | } |
---|
813 | } |
---|
814 | |
---|
815 | // Translate to FITS standard names. |
---|
816 | if (strncmp(dopplerFrame, "TOP", 3) == 0) { |
---|
817 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
818 | } else if (strncmp(dopplerFrame, "GEO", 3) == 0) { |
---|
819 | strcpy(dopplerFrame, "GEOCENTR"); |
---|
820 | } else if (strncmp(dopplerFrame, "HEL", 3) == 0) { |
---|
821 | strcpy(dopplerFrame, "HELIOCEN"); |
---|
822 | } else if (strncmp(dopplerFrame, "BARY", 4) == 0) { |
---|
823 | strcpy(dopplerFrame, "BARYCENT"); |
---|
824 | } |
---|
825 | } |
---|
826 | |
---|
827 | if (cStatus) { |
---|
828 | reportError(); |
---|
829 | return 1; |
---|
830 | } |
---|
831 | |
---|
832 | // Get parameters from first row of table. |
---|
833 | readData(DATE_OBS, 1, datobs); |
---|
834 | readData(TIME, 1, &utc); |
---|
835 | readData(FqRefVal, 1, &refFreq); |
---|
836 | readParm("BANDWID", TDOUBLE, &bandwidth); // Core. |
---|
837 | |
---|
838 | if (cALFA_BD) utc *= 3600.0; |
---|
839 | |
---|
840 | if (cStatus) { |
---|
841 | reportError(); |
---|
842 | return 1; |
---|
843 | } |
---|
844 | |
---|
845 | // Check DATE-OBS format. |
---|
846 | if (datobs[2] == '/') { |
---|
847 | // Translate an old-format DATE-OBS. |
---|
848 | datobs[9] = datobs[1]; |
---|
849 | datobs[8] = datobs[0]; |
---|
850 | datobs[2] = datobs[6]; |
---|
851 | datobs[5] = datobs[3]; |
---|
852 | datobs[3] = datobs[7]; |
---|
853 | datobs[6] = datobs[4]; |
---|
854 | datobs[7] = '-'; |
---|
855 | datobs[4] = '-'; |
---|
856 | datobs[1] = '9'; |
---|
857 | datobs[0] = '1'; |
---|
858 | datobs[10] = '\0'; |
---|
859 | |
---|
860 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
861 | // Dig UTC out of a new-format DATE-OBS. |
---|
862 | int hh, mm; |
---|
863 | float ss; |
---|
864 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
865 | utc = (hh*60 + mm)*60 + ss; |
---|
866 | datobs[10] = '\0'; |
---|
867 | } |
---|
868 | |
---|
869 | return 0; |
---|
870 | } |
---|
871 | |
---|
872 | //-------------------------------------------------- SDFITSreader::getFreqInfo |
---|
873 | |
---|
874 | // Get frequency parameters for each IF. |
---|
875 | |
---|
876 | int SDFITSreader::getFreqInfo( |
---|
877 | int &nIF, |
---|
878 | double* &startFreq, |
---|
879 | double* &endFreq) |
---|
880 | { |
---|
881 | float fqRefPix; |
---|
882 | double fqDelt, fqRefVal; |
---|
883 | |
---|
884 | nIF = cNIF; |
---|
885 | startFreq = new double[nIF]; |
---|
886 | endFreq = new double[nIF]; |
---|
887 | |
---|
888 | if (cData[IF].colnum > 0) { |
---|
889 | short *IFCol = new short[cNRow]; |
---|
890 | short IFNul = 1; |
---|
891 | int anynul; |
---|
892 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
893 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
894 | reportError(); |
---|
895 | delete [] IFCol; |
---|
896 | close(); |
---|
897 | return 1; |
---|
898 | } |
---|
899 | |
---|
900 | for (int iIF = 0; iIF < nIF; iIF++) { |
---|
901 | if (cIFs[iIF]) { |
---|
902 | // Find the first occurrence of this IF in the table. |
---|
903 | int IFno = iIF + cIF_1rel; |
---|
904 | for (int irow = 0; irow < cNRow;) { |
---|
905 | if (IFCol[irow++] == IFno) { |
---|
906 | readData(FqRefPix, irow, &fqRefPix); |
---|
907 | readData(FqRefVal, irow, &fqRefVal); |
---|
908 | readData(FqDelt, irow, &fqDelt); |
---|
909 | |
---|
910 | if (cALFA_BD) { |
---|
911 | unsigned char invert; |
---|
912 | readData("UPPERSB", TBYTE, irow, &invert); |
---|
913 | |
---|
914 | if (invert) { |
---|
915 | fqDelt = -fqDelt; |
---|
916 | } |
---|
917 | } |
---|
918 | |
---|
919 | startFreq[iIF] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
920 | endFreq[iIF] = fqRefVal + (cNChan[iIF] - fqRefPix) * fqDelt; |
---|
921 | |
---|
922 | break; |
---|
923 | } |
---|
924 | } |
---|
925 | |
---|
926 | } else { |
---|
927 | startFreq[iIF] = 0.0; |
---|
928 | endFreq[iIF] = 0.0; |
---|
929 | } |
---|
930 | } |
---|
931 | |
---|
932 | delete [] IFCol; |
---|
933 | |
---|
934 | } else { |
---|
935 | // No IF column, read the first table entry. |
---|
936 | readData(FqRefPix, 1, &fqRefPix); |
---|
937 | readData(FqRefVal, 1, &fqRefVal); |
---|
938 | readData(FqDelt, 1, &fqDelt); |
---|
939 | |
---|
940 | startFreq[0] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
941 | endFreq[0] = fqRefVal + (cNChan[0] - fqRefPix) * fqDelt; |
---|
942 | } |
---|
943 | |
---|
944 | return cStatus; |
---|
945 | } |
---|
946 | |
---|
947 | //---------------------------------------------------- SDFITSreader::findRange |
---|
948 | |
---|
949 | // Find the range of the data in time and position. |
---|
950 | |
---|
951 | int SDFITSreader::findRange( |
---|
952 | int &nRow, |
---|
953 | int &nSel, |
---|
954 | char dateSpan[2][32], |
---|
955 | double utcSpan[2], |
---|
956 | double* &positions) |
---|
957 | { |
---|
958 | int anynul; |
---|
959 | |
---|
960 | // Has the file been opened? |
---|
961 | if (!cSDptr) { |
---|
962 | return 1; |
---|
963 | } |
---|
964 | |
---|
965 | nRow = cNRow; |
---|
966 | |
---|
967 | // Find the number of rows selected. |
---|
968 | short *sel = new short[nRow]; |
---|
969 | for (int irow = 0; irow < nRow; irow++) { |
---|
970 | sel[irow] = 1; |
---|
971 | } |
---|
972 | |
---|
973 | if (cData[BEAM].colnum > 0) { |
---|
974 | short *beamCol = new short[cNRow]; |
---|
975 | short beamNul = 1; |
---|
976 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
977 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
978 | reportError(); |
---|
979 | delete [] beamCol; |
---|
980 | delete [] sel; |
---|
981 | return 1; |
---|
982 | } |
---|
983 | |
---|
984 | for (int irow = 0; irow < nRow; irow++) { |
---|
985 | if (!cBeams[beamCol[irow]-cBeam_1rel]) { |
---|
986 | sel[irow] = 0; |
---|
987 | } |
---|
988 | } |
---|
989 | |
---|
990 | delete [] beamCol; |
---|
991 | } |
---|
992 | |
---|
993 | if (cData[IF].colnum > 0) { |
---|
994 | short *IFCol = new short[cNRow]; |
---|
995 | short IFNul = 1; |
---|
996 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
997 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
998 | reportError(); |
---|
999 | delete [] IFCol; |
---|
1000 | delete [] sel; |
---|
1001 | return 1; |
---|
1002 | } |
---|
1003 | |
---|
1004 | for (int irow = 0; irow < nRow; irow++) { |
---|
1005 | if (!cIFs[IFCol[irow]-cIF_1rel]) { |
---|
1006 | sel[irow] = 0; |
---|
1007 | } |
---|
1008 | } |
---|
1009 | |
---|
1010 | delete [] IFCol; |
---|
1011 | } |
---|
1012 | |
---|
1013 | nSel = 0; |
---|
1014 | for (int irow = 0; irow < nRow; irow++) { |
---|
1015 | nSel += sel[irow]; |
---|
1016 | } |
---|
1017 | |
---|
1018 | |
---|
1019 | // Find the time range assuming the data is in chronological order. |
---|
1020 | readData(DATE_OBS, 1, dateSpan[0]); |
---|
1021 | readData(DATE_OBS, nRow, dateSpan[1]); |
---|
1022 | readData(TIME, 1, utcSpan); |
---|
1023 | readData(TIME, nRow, utcSpan+1); |
---|
1024 | |
---|
1025 | if (cALFA_BD) { |
---|
1026 | utcSpan[0] *= 3600.0; |
---|
1027 | utcSpan[1] *= 3600.0; |
---|
1028 | } |
---|
1029 | |
---|
1030 | // Check DATE-OBS format. |
---|
1031 | for (int i = 0; i < 2; i++) { |
---|
1032 | if (dateSpan[0][2] == '/') { |
---|
1033 | // Translate an old-format DATE-OBS. |
---|
1034 | dateSpan[i][9] = dateSpan[i][1]; |
---|
1035 | dateSpan[i][8] = dateSpan[i][0]; |
---|
1036 | dateSpan[i][2] = dateSpan[i][6]; |
---|
1037 | dateSpan[i][5] = dateSpan[i][3]; |
---|
1038 | dateSpan[i][3] = dateSpan[i][7]; |
---|
1039 | dateSpan[i][6] = dateSpan[i][4]; |
---|
1040 | dateSpan[i][7] = '-'; |
---|
1041 | dateSpan[i][4] = '-'; |
---|
1042 | dateSpan[i][1] = '9'; |
---|
1043 | dateSpan[i][0] = '1'; |
---|
1044 | dateSpan[i][10] = '\0'; |
---|
1045 | } |
---|
1046 | |
---|
1047 | if (dateSpan[i][10] == 'T' && cData[TIME].colnum < 0) { |
---|
1048 | // Dig UTC out of a new-format DATE-OBS. |
---|
1049 | int hh, mm; |
---|
1050 | float ss; |
---|
1051 | sscanf(dateSpan[i]+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
1052 | utcSpan[i] = (hh*60 + mm)*60 + ss; |
---|
1053 | } |
---|
1054 | } |
---|
1055 | |
---|
1056 | |
---|
1057 | // Retrieve positions for selected data. |
---|
1058 | double *ra = new double[cNRow]; |
---|
1059 | double *dec = new double[cNRow]; |
---|
1060 | fits_read_col(cSDptr, TDOUBLE, cData[RA].colnum, 1, 1, nRow, 0, ra, |
---|
1061 | &anynul, &cStatus); |
---|
1062 | fits_read_col(cSDptr, TDOUBLE, cData[DEC].colnum, 1, 1, nRow, 0, dec, |
---|
1063 | &anynul, &cStatus); |
---|
1064 | |
---|
1065 | if (cALFA_BD) { |
---|
1066 | for (int irow = 0; irow < nRow; irow++) { |
---|
1067 | // Convert hours to degrees. |
---|
1068 | ra[irow] *= 15.0; |
---|
1069 | } |
---|
1070 | } |
---|
1071 | |
---|
1072 | int isel = 0; |
---|
1073 | positions = new double[2*nSel]; |
---|
1074 | |
---|
1075 | // Parameters needed to compute feed-plane coordinates. |
---|
1076 | double *srcRA, *srcDec; |
---|
1077 | float *par, *rot; |
---|
1078 | if (cGetFeedPos) { |
---|
1079 | srcRA = new double[cNRow]; |
---|
1080 | srcDec = new double[cNRow]; |
---|
1081 | par = new float[cNRow]; |
---|
1082 | rot = new float[cNRow]; |
---|
1083 | fits_read_col(cSDptr, TDOUBLE, cData[OBJ_RA].colnum, 1, 1, nRow, 0, |
---|
1084 | srcRA, &anynul, &cStatus); |
---|
1085 | fits_read_col(cSDptr, TDOUBLE, cData[OBJ_DEC].colnum, 1, 1, nRow, 0, |
---|
1086 | srcDec, &anynul, &cStatus); |
---|
1087 | fits_read_col(cSDptr, TFLOAT, cData[PARANGLE].colnum, 1, 1, nRow, 0, |
---|
1088 | par, &anynul, &cStatus); |
---|
1089 | fits_read_col(cSDptr, TFLOAT, cData[FOCUSROT].colnum, 1, 1, nRow, 0, |
---|
1090 | rot, &anynul, &cStatus); |
---|
1091 | |
---|
1092 | for (int irow = 0; irow < nRow; irow++) { |
---|
1093 | if (sel[irow]) { |
---|
1094 | // Convert to feed-plane coordinates. |
---|
1095 | Double dist, pa; |
---|
1096 | distPA(ra[irow]*D2R, dec[irow]*D2R, srcRA[irow]*D2R, srcDec[irow]*D2R, |
---|
1097 | dist, pa); |
---|
1098 | |
---|
1099 | Double spin = (par[irow] + rot[irow])*D2R - pa + PI; |
---|
1100 | if (spin > 2.0*PI) spin -= 2.0*PI; |
---|
1101 | Double squint = PI/2.0 - dist; |
---|
1102 | |
---|
1103 | positions[isel++] = spin; |
---|
1104 | positions[isel++] = squint; |
---|
1105 | } |
---|
1106 | } |
---|
1107 | |
---|
1108 | delete [] srcRA; |
---|
1109 | delete [] srcDec; |
---|
1110 | delete [] par; |
---|
1111 | delete [] rot; |
---|
1112 | |
---|
1113 | } else { |
---|
1114 | for (int irow = 0; irow < nRow; irow++) { |
---|
1115 | if (sel[irow]) { |
---|
1116 | positions[isel++] = ra[irow] * D2R; |
---|
1117 | positions[isel++] = dec[irow] * D2R; |
---|
1118 | } |
---|
1119 | } |
---|
1120 | } |
---|
1121 | |
---|
1122 | delete [] sel; |
---|
1123 | delete [] ra; |
---|
1124 | delete [] dec; |
---|
1125 | |
---|
1126 | return cStatus; |
---|
1127 | } |
---|
1128 | |
---|
1129 | |
---|
1130 | //--------------------------------------------------------- SDFITSreader::read |
---|
1131 | |
---|
1132 | // Read the next data record. |
---|
1133 | |
---|
1134 | int SDFITSreader::read( |
---|
1135 | PKSMBrecord &mbrec) |
---|
1136 | { |
---|
1137 | // Has the file been opened? |
---|
1138 | if (!cSDptr) { |
---|
1139 | return 1; |
---|
1140 | } |
---|
1141 | |
---|
1142 | // Find the next selected beam and IF. |
---|
1143 | short iBeam = 0, iIF = 0; |
---|
1144 | while (++cRow <= cNRow) { |
---|
1145 | if (cData[BEAM].colnum > 0) { |
---|
1146 | readData(BEAM, cRow, &iBeam); |
---|
1147 | |
---|
1148 | // Convert to 0-relative. |
---|
1149 | if (cBeam_1rel) iBeam--; |
---|
1150 | } |
---|
1151 | |
---|
1152 | |
---|
1153 | if (cBeams[iBeam]) { |
---|
1154 | if (cData[IF].colnum > 0) { |
---|
1155 | readData(IF, cRow, &iIF); |
---|
1156 | |
---|
1157 | // Convert to 0-relative. |
---|
1158 | if (cIF_1rel) iIF--; |
---|
1159 | } |
---|
1160 | |
---|
1161 | if (cIFs[iIF]) { |
---|
1162 | if (cALFA) { |
---|
1163 | // ALFA data, check for calibration data. |
---|
1164 | char chars[32]; |
---|
1165 | readData(OBSMODE, cRow, chars); |
---|
1166 | if (strcmp(chars, "CAL") == 0) { |
---|
1167 | // iIF is really the polarization in ALFA data. |
---|
1168 | alfaCal(iBeam, iIF); |
---|
1169 | continue; |
---|
1170 | } |
---|
1171 | } |
---|
1172 | |
---|
1173 | break; |
---|
1174 | } |
---|
1175 | } |
---|
1176 | } |
---|
1177 | |
---|
1178 | // EOF? |
---|
1179 | if (cRow > cNRow) { |
---|
1180 | return -1; |
---|
1181 | } |
---|
1182 | |
---|
1183 | |
---|
1184 | if (cALFA) { |
---|
1185 | int scanNo; |
---|
1186 | readData(SCAN, cRow, &scanNo); |
---|
1187 | if (scanNo != cALFAscan) { |
---|
1188 | cScanNo++; |
---|
1189 | cALFAscan = scanNo; |
---|
1190 | } |
---|
1191 | mbrec.scanNo = cScanNo; |
---|
1192 | |
---|
1193 | } else { |
---|
1194 | readData(SCAN, cRow, &mbrec.scanNo); |
---|
1195 | |
---|
1196 | // Ensure that scan number is 1-relative. |
---|
1197 | mbrec.scanNo -= (cFirstScanNo - 1); |
---|
1198 | } |
---|
1199 | |
---|
1200 | // Times. |
---|
1201 | char datobs[32]; |
---|
1202 | readData(DATE_OBS, cRow, datobs); |
---|
1203 | readData(TIME, cRow, &mbrec.utc); |
---|
1204 | if (cALFA_BD) mbrec.utc *= 3600.0; |
---|
1205 | |
---|
1206 | if (datobs[2] == '/') { |
---|
1207 | // Translate an old-format DATE-OBS. |
---|
1208 | datobs[9] = datobs[1]; |
---|
1209 | datobs[8] = datobs[0]; |
---|
1210 | datobs[2] = datobs[6]; |
---|
1211 | datobs[5] = datobs[3]; |
---|
1212 | datobs[3] = datobs[7]; |
---|
1213 | datobs[6] = datobs[4]; |
---|
1214 | datobs[7] = '-'; |
---|
1215 | datobs[4] = '-'; |
---|
1216 | datobs[1] = '9'; |
---|
1217 | datobs[0] = '1'; |
---|
1218 | |
---|
1219 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
1220 | // Dig UTC out of a new-format DATE-OBS. |
---|
1221 | int hh, mm; |
---|
1222 | float ss; |
---|
1223 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
1224 | mbrec.utc = (hh*60 + mm)*60 + ss; |
---|
1225 | } |
---|
1226 | |
---|
1227 | datobs[10] = '\0'; |
---|
1228 | strcpy(mbrec.datobs, datobs); |
---|
1229 | |
---|
1230 | if (cData[CYCLE].colnum > 0) { |
---|
1231 | readData(CYCLE, cRow, &mbrec.cycleNo); |
---|
1232 | if (cALFA_BD) mbrec.cycleNo++; |
---|
1233 | } else { |
---|
1234 | // Cycle number not recorded, must do our own bookkeeping. |
---|
1235 | if (mbrec.utc != cLastUTC) { |
---|
1236 | mbrec.cycleNo = ++cCycleNo; |
---|
1237 | cLastUTC = mbrec.utc; |
---|
1238 | } |
---|
1239 | } |
---|
1240 | |
---|
1241 | readData(EXPOSURE, cRow, &mbrec.exposure); |
---|
1242 | |
---|
1243 | // Source identification. |
---|
1244 | readData(OBJECT, cRow, mbrec.srcName); |
---|
1245 | |
---|
1246 | readData(OBJ_RA, cRow, &mbrec.srcRA); |
---|
1247 | if (strcmp(cData[OBJ_RA].name, "OBJ-RA") == 0) { |
---|
1248 | mbrec.srcRA *= D2R; |
---|
1249 | } |
---|
1250 | |
---|
1251 | if (strcmp(cData[OBJ_DEC].name, "OBJ-DEC") == 0) { |
---|
1252 | readData(OBJ_DEC, cRow, &mbrec.srcDec); |
---|
1253 | mbrec.srcDec *= D2R; |
---|
1254 | } |
---|
1255 | |
---|
1256 | // Line rest frequency (Hz). |
---|
1257 | readData(RESTFRQ, cRow, &mbrec.restFreq); |
---|
1258 | if (mbrec.restFreq == 0.0 && cALFA_BD) { |
---|
1259 | mbrec.restFreq = 1420.40575e6; |
---|
1260 | } |
---|
1261 | |
---|
1262 | // Observation mode. |
---|
1263 | readData(OBSMODE, cRow, mbrec.obsType); |
---|
1264 | |
---|
1265 | // Beam-dependent parameters. |
---|
1266 | mbrec.beamNo = iBeam + 1; |
---|
1267 | |
---|
1268 | readData(RA, cRow, &mbrec.ra); |
---|
1269 | readData(DEC, cRow, &mbrec.dec); |
---|
1270 | mbrec.ra *= D2R; |
---|
1271 | mbrec.dec *= D2R; |
---|
1272 | |
---|
1273 | if (cALFA_BD) mbrec.ra *= 15.0; |
---|
1274 | |
---|
1275 | float scanrate[2]; |
---|
1276 | readData(SCANRATE, cRow, &scanrate); |
---|
1277 | if (strcmp(cData[SCANRATE].name, "SCANRATE") == 0) { |
---|
1278 | mbrec.raRate = scanrate[0] * D2R; |
---|
1279 | mbrec.decRate = scanrate[1] * D2R; |
---|
1280 | } |
---|
1281 | |
---|
1282 | // IF-dependent parameters. |
---|
1283 | int startChan = cStartChan[iIF]; |
---|
1284 | int endChan = cEndChan[iIF]; |
---|
1285 | int refChan = cRefChan[iIF]; |
---|
1286 | |
---|
1287 | // Allocate data storage. |
---|
1288 | int nChan = abs(endChan - startChan) + 1; |
---|
1289 | int nPol = cNPol[iIF]; |
---|
1290 | |
---|
1291 | if (cGetSpectra || cGetXPol) { |
---|
1292 | int nxpol = cGetXPol ? 2*nChan : 0; |
---|
1293 | mbrec.allocate(0, nChan*nPol, nxpol); |
---|
1294 | } |
---|
1295 | |
---|
1296 | mbrec.nIF = 1; |
---|
1297 | mbrec.IFno[0] = iIF + 1; |
---|
1298 | mbrec.nChan[0] = nChan; |
---|
1299 | mbrec.nPol[0] = nPol; |
---|
1300 | |
---|
1301 | readData(FqRefPix, cRow, mbrec.fqRefPix); |
---|
1302 | readData(FqRefVal, cRow, mbrec.fqRefVal); |
---|
1303 | readData(FqDelt, cRow, mbrec.fqDelt); |
---|
1304 | |
---|
1305 | if (cALFA_BD) { |
---|
1306 | unsigned char invert; |
---|
1307 | int anynul, colnum; |
---|
1308 | findCol("UPPERSB", &colnum); |
---|
1309 | fits_read_col(cSDptr, TBYTE, colnum, cRow, 1, 1, 0, &invert, &anynul, |
---|
1310 | &cStatus); |
---|
1311 | |
---|
1312 | if (invert) { |
---|
1313 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1314 | } |
---|
1315 | } |
---|
1316 | |
---|
1317 | if (cStatus) { |
---|
1318 | reportError(); |
---|
1319 | return 1; |
---|
1320 | } |
---|
1321 | |
---|
1322 | // Adjust for channel selection. |
---|
1323 | if (mbrec.fqRefPix[0] != refChan) { |
---|
1324 | mbrec.fqRefVal[0] += (refChan - mbrec.fqRefPix[0]) * mbrec.fqDelt[0]; |
---|
1325 | mbrec.fqRefPix[0] = refChan; |
---|
1326 | } |
---|
1327 | |
---|
1328 | if (endChan < startChan) { |
---|
1329 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1330 | } |
---|
1331 | |
---|
1332 | // The data may only have a scalar Tsys value. |
---|
1333 | mbrec.tsys[0][0] = 0.0f; |
---|
1334 | mbrec.tsys[0][1] = 0.0f; |
---|
1335 | if (cData[TSYS].nelem >= nPol) { |
---|
1336 | readData(TSYS, cRow, mbrec.tsys[0]); |
---|
1337 | } |
---|
1338 | |
---|
1339 | for (int j = 0; j < 2; j++) { |
---|
1340 | mbrec.calfctr[0][j] = 0.0f; |
---|
1341 | } |
---|
1342 | if (cData[CALFCTR].colnum > 0) { |
---|
1343 | readData(CALFCTR, cRow, mbrec.calfctr); |
---|
1344 | } |
---|
1345 | |
---|
1346 | if (cHaveBase) { |
---|
1347 | mbrec.haveBase = 1; |
---|
1348 | readData(BASELIN, cRow, mbrec.baseLin); |
---|
1349 | readData(BASESUB, cRow, mbrec.baseSub); |
---|
1350 | } else { |
---|
1351 | mbrec.haveBase = 0; |
---|
1352 | } |
---|
1353 | |
---|
1354 | if (cStatus) { |
---|
1355 | reportError(); |
---|
1356 | return 1; |
---|
1357 | } |
---|
1358 | |
---|
1359 | // Read data, sectioning and transposing it in the process. |
---|
1360 | long *blc = new long[cNAxis+1]; |
---|
1361 | long *trc = new long[cNAxis+1]; |
---|
1362 | long *inc = new long[cNAxis+1]; |
---|
1363 | for (int iaxis = 0; iaxis <= cNAxis; iaxis++) { |
---|
1364 | blc[iaxis] = 1; |
---|
1365 | trc[iaxis] = 1; |
---|
1366 | inc[iaxis] = 1; |
---|
1367 | } |
---|
1368 | |
---|
1369 | blc[cReqax[0]] = std::min(startChan, endChan); |
---|
1370 | trc[cReqax[0]] = std::max(startChan, endChan); |
---|
1371 | blc[cNAxis] = cRow; |
---|
1372 | trc[cNAxis] = cRow; |
---|
1373 | |
---|
1374 | mbrec.haveSpectra = cGetSpectra; |
---|
1375 | if (cGetSpectra) { |
---|
1376 | int anynul; |
---|
1377 | |
---|
1378 | for (int ipol = 0; ipol < nPol; ipol++) { |
---|
1379 | blc[cReqax[1]] = ipol+1; |
---|
1380 | trc[cReqax[1]] = ipol+1; |
---|
1381 | |
---|
1382 | if (cALFA) { |
---|
1383 | // ALFA data: polarizations are stored in successive rows. |
---|
1384 | blc[cReqax[1]] = 1; |
---|
1385 | trc[cReqax[1]] = 1; |
---|
1386 | |
---|
1387 | if (ipol) { |
---|
1388 | if (++cRow > cNRow) { |
---|
1389 | return -1; |
---|
1390 | } |
---|
1391 | |
---|
1392 | blc[cNAxis] = cRow; |
---|
1393 | trc[cNAxis] = cRow; |
---|
1394 | } |
---|
1395 | |
---|
1396 | } else if (cData[DATA].nelem < 0) { |
---|
1397 | // Variable dimension array; get axis lengths. |
---|
1398 | int naxis = 5, status; |
---|
1399 | |
---|
1400 | if ((status = readDim(DATA, cRow, &naxis, cNAxes))) { |
---|
1401 | reportError(); |
---|
1402 | |
---|
1403 | } else if ((status = (naxis != cNAxis))) { |
---|
1404 | cerr << "DATA array dimensions changed." << endl; |
---|
1405 | } |
---|
1406 | |
---|
1407 | if (status) { |
---|
1408 | delete [] blc; |
---|
1409 | delete [] trc; |
---|
1410 | delete [] inc; |
---|
1411 | return 1; |
---|
1412 | } |
---|
1413 | } |
---|
1414 | |
---|
1415 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxis, cNAxes, |
---|
1416 | blc, trc, inc, 0, mbrec.spectra[0] + ipol*nChan, &anynul, |
---|
1417 | &cStatus)) { |
---|
1418 | reportError(); |
---|
1419 | delete [] blc; |
---|
1420 | delete [] trc; |
---|
1421 | delete [] inc; |
---|
1422 | return 1; |
---|
1423 | } |
---|
1424 | |
---|
1425 | if (endChan < startChan) { |
---|
1426 | // Reverse the spectrum. |
---|
1427 | float *iptr = mbrec.spectra[0] + ipol*nChan; |
---|
1428 | float *jptr = iptr + nChan - 1; |
---|
1429 | float *mid = iptr + nChan/2; |
---|
1430 | while (iptr < mid) { |
---|
1431 | float tmp = *iptr; |
---|
1432 | *(iptr++) = *jptr; |
---|
1433 | *(jptr--) = tmp; |
---|
1434 | } |
---|
1435 | } |
---|
1436 | |
---|
1437 | if (cALFA) { |
---|
1438 | // ALFA data, rescale the spectrum. |
---|
1439 | float *chan = mbrec.spectra[0] + ipol*nChan; |
---|
1440 | float *chanN = chan + nChan; |
---|
1441 | while (chan < chanN) { |
---|
1442 | // Approximate conversion to Jy. |
---|
1443 | *(chan++) *= cALFAcal[iBeam][iIF]; |
---|
1444 | } |
---|
1445 | } |
---|
1446 | |
---|
1447 | if (mbrec.tsys[0][ipol] == 0.0) { |
---|
1448 | // Compute Tsys as the average across the spectrum. |
---|
1449 | float *chan = mbrec.spectra[0] + ipol*nChan; |
---|
1450 | float *chanN = chan + nChan; |
---|
1451 | float *tsys = mbrec.tsys[0] + ipol; |
---|
1452 | while (chan < chanN) { |
---|
1453 | *tsys += *(chan++); |
---|
1454 | } |
---|
1455 | |
---|
1456 | *tsys /= nChan; |
---|
1457 | } |
---|
1458 | |
---|
1459 | // Read data flags. |
---|
1460 | if (cData[FLAGGED].colnum > 0) { |
---|
1461 | if (fits_read_subset_byt(cSDptr, cData[FLAGGED].colnum, cNAxis, |
---|
1462 | cNAxes, blc, trc, inc, 0, mbrec.flagged[0] + ipol*nChan, &anynul, |
---|
1463 | &cStatus)) { |
---|
1464 | reportError(); |
---|
1465 | delete [] blc; |
---|
1466 | delete [] trc; |
---|
1467 | delete [] inc; |
---|
1468 | return 1; |
---|
1469 | } |
---|
1470 | |
---|
1471 | if (endChan < startChan) { |
---|
1472 | // Reverse the flag vector. |
---|
1473 | unsigned char *iptr = mbrec.flagged[0] + ipol*nChan; |
---|
1474 | unsigned char *jptr = iptr + nChan - 1; |
---|
1475 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1476 | unsigned char tmp = *iptr; |
---|
1477 | *(iptr++) = *jptr; |
---|
1478 | *(jptr--) = tmp; |
---|
1479 | } |
---|
1480 | } |
---|
1481 | |
---|
1482 | } else { |
---|
1483 | // All channels are unflagged by default. |
---|
1484 | unsigned char *iptr = mbrec.flagged[0] + ipol*nChan; |
---|
1485 | for (int ichan = 0; ichan < nChan; ichan++) { |
---|
1486 | *(iptr++) = 0; |
---|
1487 | } |
---|
1488 | } |
---|
1489 | } |
---|
1490 | } |
---|
1491 | |
---|
1492 | |
---|
1493 | // Read cross-polarization data. |
---|
1494 | if (cGetXPol) { |
---|
1495 | int anynul; |
---|
1496 | for (int j = 0; j < 2; j++) { |
---|
1497 | mbrec.xcalfctr[0][j] = 0.0f; |
---|
1498 | } |
---|
1499 | if (cData[XCALFCTR].colnum > 0) { |
---|
1500 | readData(XCALFCTR, cRow, mbrec.xcalfctr); |
---|
1501 | } |
---|
1502 | |
---|
1503 | blc[0] = 1; |
---|
1504 | trc[0] = 2; |
---|
1505 | blc[1] = std::min(startChan, endChan); |
---|
1506 | trc[1] = std::max(startChan, endChan); |
---|
1507 | blc[2] = cRow; |
---|
1508 | trc[2] = cRow; |
---|
1509 | |
---|
1510 | int nAxis = 2; |
---|
1511 | long nAxes[] = {2, nChan}; |
---|
1512 | |
---|
1513 | if (fits_read_subset_flt(cSDptr, cData[XPOLDATA].colnum, nAxis, nAxes, |
---|
1514 | blc, trc, inc, 0, mbrec.xpol[0], &anynul, &cStatus)) { |
---|
1515 | reportError(); |
---|
1516 | delete [] blc; |
---|
1517 | delete [] trc; |
---|
1518 | delete [] inc; |
---|
1519 | return 1; |
---|
1520 | } |
---|
1521 | |
---|
1522 | if (endChan < startChan) { |
---|
1523 | // Invert the cross-polarization spectrum. |
---|
1524 | float *iptr = mbrec.xpol[0]; |
---|
1525 | float *jptr = iptr + nChan - 2; |
---|
1526 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1527 | float tmp = *iptr; |
---|
1528 | *iptr = *jptr; |
---|
1529 | *jptr = tmp; |
---|
1530 | |
---|
1531 | tmp = *(iptr+1); |
---|
1532 | *(iptr+1) = *(jptr+1); |
---|
1533 | *(jptr+1) = tmp; |
---|
1534 | |
---|
1535 | iptr += 2; |
---|
1536 | jptr -= 2; |
---|
1537 | } |
---|
1538 | } |
---|
1539 | } |
---|
1540 | |
---|
1541 | delete [] blc; |
---|
1542 | delete [] trc; |
---|
1543 | delete [] inc; |
---|
1544 | |
---|
1545 | if (cStatus) { |
---|
1546 | reportError(); |
---|
1547 | return 1; |
---|
1548 | } |
---|
1549 | |
---|
1550 | mbrec.extraSysCal = cExtraSysCal; |
---|
1551 | readData(REFBEAM, cRow, &mbrec.refBeam); |
---|
1552 | readData(TCAL, cRow, &mbrec.tcal[0]); |
---|
1553 | readData(TCALTIME, cRow, mbrec.tcalTime); |
---|
1554 | readData(AZIMUTH, cRow, &mbrec.azimuth); |
---|
1555 | readData(ELEVATIO, cRow, &mbrec.elevation); |
---|
1556 | readData(PARANGLE, cRow, &mbrec.parAngle); |
---|
1557 | readData(FOCUSAXI, cRow, &mbrec.focusAxi); |
---|
1558 | readData(FOCUSTAN, cRow, &mbrec.focusTan); |
---|
1559 | readData(FOCUSROT, cRow, &mbrec.focusRot); |
---|
1560 | readData(TAMBIENT, cRow, &mbrec.temp); |
---|
1561 | readData(PRESSURE, cRow, &mbrec.pressure); |
---|
1562 | readData(HUMIDITY, cRow, &mbrec.humidity); |
---|
1563 | readData(WINDSPEE, cRow, &mbrec.windSpeed); |
---|
1564 | readData(WINDDIRE, cRow, &mbrec.windAz); |
---|
1565 | |
---|
1566 | if (cALFA_BD) { |
---|
1567 | // ALFA BDFITS stores zenith angle rather than elevation. |
---|
1568 | mbrec.elevation = 90.0 - mbrec.elevation; |
---|
1569 | } |
---|
1570 | |
---|
1571 | mbrec.azimuth *= D2R; |
---|
1572 | mbrec.elevation *= D2R; |
---|
1573 | mbrec.parAngle *= D2R; |
---|
1574 | mbrec.focusRot *= D2R; |
---|
1575 | mbrec.windAz *= D2R; |
---|
1576 | |
---|
1577 | if (cStatus) { |
---|
1578 | reportError(); |
---|
1579 | return 1; |
---|
1580 | } |
---|
1581 | |
---|
1582 | return 0; |
---|
1583 | } |
---|
1584 | |
---|
1585 | |
---|
1586 | //------------------------------------------------------ SDFITSreader::alfaCal |
---|
1587 | |
---|
1588 | // Process ALFA calibration data. |
---|
1589 | |
---|
1590 | int SDFITSreader::alfaCal( |
---|
1591 | short iBeam, |
---|
1592 | short iPol) |
---|
1593 | { |
---|
1594 | int calOn; |
---|
1595 | char chars[32]; |
---|
1596 | if (cALFA_BD) { |
---|
1597 | readData("OBS_NAME", TSTRING, cRow, chars); |
---|
1598 | } else { |
---|
1599 | readData("SCANTYPE", TSTRING, cRow, chars); |
---|
1600 | } |
---|
1601 | |
---|
1602 | if (strcmp(chars, "ON") == 0) { |
---|
1603 | calOn = 1; |
---|
1604 | } else if (strcmp(chars, "OFF") == 0) { |
---|
1605 | calOn = 0; |
---|
1606 | } else { |
---|
1607 | return 1; |
---|
1608 | } |
---|
1609 | |
---|
1610 | // Read cal data. |
---|
1611 | long *blc = new long[cNAxis+1]; |
---|
1612 | long *trc = new long[cNAxis+1]; |
---|
1613 | long *inc = new long[cNAxis+1]; |
---|
1614 | for (int iaxis = 0; iaxis <= cNAxis; iaxis++) { |
---|
1615 | blc[iaxis] = 1; |
---|
1616 | trc[iaxis] = 1; |
---|
1617 | inc[iaxis] = 1; |
---|
1618 | } |
---|
1619 | |
---|
1620 | // User channel selection. |
---|
1621 | int startChan = cStartChan[0]; |
---|
1622 | int endChan = cEndChan[0]; |
---|
1623 | |
---|
1624 | blc[cNAxis] = cRow; |
---|
1625 | trc[cNAxis] = cRow; |
---|
1626 | blc[cReqax[0]] = std::min(startChan, endChan); |
---|
1627 | trc[cReqax[0]] = std::max(startChan, endChan); |
---|
1628 | blc[cReqax[1]] = 1; |
---|
1629 | trc[cReqax[1]] = 1; |
---|
1630 | |
---|
1631 | float spectrum[endChan]; |
---|
1632 | int anynul; |
---|
1633 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxis, cNAxes, |
---|
1634 | blc, trc, inc, 0, spectrum, &anynul, &cStatus)) { |
---|
1635 | reportError(); |
---|
1636 | delete [] blc; |
---|
1637 | delete [] trc; |
---|
1638 | delete [] inc; |
---|
1639 | return 1; |
---|
1640 | } |
---|
1641 | |
---|
1642 | // Average the spectrum. |
---|
1643 | float mean = 1e9f; |
---|
1644 | for (int k = 0; k < 2; k++) { |
---|
1645 | float discrim = 2.0f * mean; |
---|
1646 | |
---|
1647 | int nChan = 0; |
---|
1648 | float sum = 0.0f; |
---|
1649 | |
---|
1650 | float *chanN = spectrum + abs(endChan - startChan) + 1; |
---|
1651 | for (float *chan = spectrum; chan < chanN; chan++) { |
---|
1652 | // Simple discriminant that eliminates strong radar interference. |
---|
1653 | if (*chan < discrim) { |
---|
1654 | nChan++; |
---|
1655 | sum += *chan; |
---|
1656 | } |
---|
1657 | } |
---|
1658 | |
---|
1659 | mean = sum / nChan; |
---|
1660 | } |
---|
1661 | |
---|
1662 | if (calOn) { |
---|
1663 | cALFAcalOn[iBeam][iPol] += mean; |
---|
1664 | } else { |
---|
1665 | cALFAcalOff[iBeam][iPol] += mean; |
---|
1666 | } |
---|
1667 | |
---|
1668 | if (cALFAcalOn[iBeam][iPol] != 0.0f && |
---|
1669 | cALFAcalOff[iBeam][iPol] != 0.0f) { |
---|
1670 | // Tcal should come from the TCAL table, it varies weakly with beam, |
---|
1671 | // polarization, and frequency. However, TCAL is not written properly. |
---|
1672 | float Tcal = 12.0f; |
---|
1673 | cALFAcal[iBeam][iPol] = Tcal / (cALFAcalOn[iBeam][iPol] - |
---|
1674 | cALFAcalOff[iBeam][iPol]); |
---|
1675 | |
---|
1676 | // Scale from K to Jy; the gain also varies weakly with beam, |
---|
1677 | // polarization, frequency, and zenith angle. |
---|
1678 | float fluxCal = 10.0f; |
---|
1679 | cALFAcal[iBeam][iPol] /= fluxCal; |
---|
1680 | |
---|
1681 | cALFAcalOn[iBeam][iPol] = 0.0f; |
---|
1682 | cALFAcalOff[iBeam][iPol] = 0.0f; |
---|
1683 | } |
---|
1684 | |
---|
1685 | return 0; |
---|
1686 | } |
---|
1687 | |
---|
1688 | |
---|
1689 | //-------------------------------------------------- SDFITSreader::reportError |
---|
1690 | |
---|
1691 | // Print the error message corresponding to the input status value and all the |
---|
1692 | // messages on the CFITSIO error stack to stderr. |
---|
1693 | |
---|
1694 | void SDFITSreader::reportError() |
---|
1695 | { |
---|
1696 | fits_report_error(stderr, cStatus); |
---|
1697 | } |
---|
1698 | |
---|
1699 | //-------------------------------------------------------- SDFITSreader::close |
---|
1700 | |
---|
1701 | // Close the SDFITS file. |
---|
1702 | |
---|
1703 | void SDFITSreader::close() |
---|
1704 | { |
---|
1705 | if (cSDptr) { |
---|
1706 | int status = 0; |
---|
1707 | fits_close_file(cSDptr, &status); |
---|
1708 | cSDptr = 0; |
---|
1709 | |
---|
1710 | if (cBeams) delete [] cBeams; |
---|
1711 | if (cIFs) delete [] cIFs; |
---|
1712 | if (cStartChan) delete [] cStartChan; |
---|
1713 | if (cEndChan) delete [] cEndChan; |
---|
1714 | if (cRefChan) delete [] cRefChan; |
---|
1715 | } |
---|
1716 | } |
---|
1717 | |
---|
1718 | //----------------------------------------------------- SDFITSreader::findData |
---|
1719 | |
---|
1720 | // Locate a data item in the SDFITS file. |
---|
1721 | |
---|
1722 | void SDFITSreader::findData( |
---|
1723 | int iData, |
---|
1724 | char *name, |
---|
1725 | int type) |
---|
1726 | { |
---|
1727 | cData[iData].name = name; |
---|
1728 | cData[iData].type = type; |
---|
1729 | |
---|
1730 | int colnum; |
---|
1731 | findCol(name, &colnum); |
---|
1732 | cData[iData].colnum = colnum; |
---|
1733 | |
---|
1734 | // Determine the number of data elements. |
---|
1735 | if (colnum > 0) { |
---|
1736 | int coltype; |
---|
1737 | long nelem, width; |
---|
1738 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
1739 | |
---|
1740 | // Look for a TDIMnnn keyword or column. |
---|
1741 | char tdim[8]; |
---|
1742 | sprintf(tdim, "TDIM%d", colnum); |
---|
1743 | findCol(tdim, &cData[iData].tdimcol); |
---|
1744 | |
---|
1745 | if (coltype < 0) { |
---|
1746 | // CFITSIO returns coltype < 0 for variable length arrays. |
---|
1747 | cData[iData].coltype = -coltype; |
---|
1748 | cData[iData].nelem = -nelem; |
---|
1749 | |
---|
1750 | } else { |
---|
1751 | cData[iData].coltype = coltype; |
---|
1752 | |
---|
1753 | // Is there a TDIMnnn column? |
---|
1754 | if (cData[iData].tdimcol > 0) { |
---|
1755 | // Yes, dimensions of the fixed-length array could still vary. |
---|
1756 | cData[iData].nelem = -nelem; |
---|
1757 | } else { |
---|
1758 | cData[iData].nelem = nelem; |
---|
1759 | } |
---|
1760 | } |
---|
1761 | |
---|
1762 | } else if (colnum == 0) { |
---|
1763 | // Keyword. |
---|
1764 | cData[iData].coltype = 0; |
---|
1765 | cData[iData].nelem = 1; |
---|
1766 | cData[iData].tdimcol = -1; |
---|
1767 | } |
---|
1768 | } |
---|
1769 | |
---|
1770 | //------------------------------------------------------ SDFITSreader::readDim |
---|
1771 | |
---|
1772 | // Determine the dimensions of an array in the SDFITS file. |
---|
1773 | |
---|
1774 | int SDFITSreader::readDim( |
---|
1775 | int iData, |
---|
1776 | long iRow, |
---|
1777 | int *naxis, |
---|
1778 | long naxes[]) |
---|
1779 | { |
---|
1780 | int colnum = cData[iData].colnum; |
---|
1781 | if (colnum <= 0) { |
---|
1782 | return 1; |
---|
1783 | } |
---|
1784 | |
---|
1785 | int maxdim = *naxis; |
---|
1786 | if (cData[iData].tdimcol < 0) { |
---|
1787 | // No TDIMnnn column for this array. |
---|
1788 | if (cData[iData].nelem < 0) { |
---|
1789 | // Variable length array; read the array descriptor. |
---|
1790 | *naxis = 1; |
---|
1791 | long dummy; |
---|
1792 | if (fits_read_descript(cSDptr, colnum, iRow, naxes, &dummy, &cStatus)) { |
---|
1793 | return 1; |
---|
1794 | } |
---|
1795 | |
---|
1796 | } else { |
---|
1797 | // Read the repeat count from TFORMnnn. |
---|
1798 | if (fits_read_tdim(cSDptr, colnum, maxdim, naxis, naxes, &cStatus)) { |
---|
1799 | return 1; |
---|
1800 | } |
---|
1801 | } |
---|
1802 | |
---|
1803 | } else { |
---|
1804 | // Read the TDIMnnn value from the header or table. |
---|
1805 | char tdim[8], tdimval[64]; |
---|
1806 | sprintf(tdim, "TDIM%d", colnum); |
---|
1807 | readData(tdim, TSTRING, iRow, tdimval); |
---|
1808 | |
---|
1809 | // fits_decode_tdim() checks that the TDIMnnn value is within the length |
---|
1810 | // of the array in the specified column number but unfortunately doesn't |
---|
1811 | // recognize variable-length arrays. Hence we must decode it here. |
---|
1812 | char *tp = tdimval; |
---|
1813 | if (*tp != '(') return 1; |
---|
1814 | |
---|
1815 | tp++; |
---|
1816 | *naxis = 0; |
---|
1817 | for (size_t j = 1; j < strlen(tdimval); j++) { |
---|
1818 | if (tdimval[j] == ',' || tdimval[j] == ')') { |
---|
1819 | sscanf(tp, "%ld", naxes + (*naxis)++); |
---|
1820 | if (tdimval[j] == ')') break; |
---|
1821 | tp = tdimval + j + 1; |
---|
1822 | } |
---|
1823 | } |
---|
1824 | } |
---|
1825 | |
---|
1826 | return 0; |
---|
1827 | } |
---|
1828 | |
---|
1829 | //----------------------------------------------------- SDFITSreader::readParm |
---|
1830 | |
---|
1831 | // Read a parameter value from the SDFITS file. |
---|
1832 | |
---|
1833 | int SDFITSreader::readParm( |
---|
1834 | char *name, |
---|
1835 | int type, |
---|
1836 | void *value) |
---|
1837 | { |
---|
1838 | return readData(name, type, 1, value); |
---|
1839 | } |
---|
1840 | |
---|
1841 | //----------------------------------------------------- SDFITSreader::readData |
---|
1842 | |
---|
1843 | // Read a data value from the SDFITS file. |
---|
1844 | |
---|
1845 | int SDFITSreader::readData( |
---|
1846 | char *name, |
---|
1847 | int type, |
---|
1848 | long iRow, |
---|
1849 | void *value) |
---|
1850 | { |
---|
1851 | int colnum; |
---|
1852 | findCol(name, &colnum); |
---|
1853 | |
---|
1854 | if (colnum > 0) { |
---|
1855 | // Read the first value from the specified row of the table. |
---|
1856 | int coltype; |
---|
1857 | long nelem, width; |
---|
1858 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
1859 | |
---|
1860 | int anynul; |
---|
1861 | if (type == TSTRING) { |
---|
1862 | if (nelem) { |
---|
1863 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
1864 | &cStatus); |
---|
1865 | } else { |
---|
1866 | strcpy((char *)value, ""); |
---|
1867 | } |
---|
1868 | |
---|
1869 | } else { |
---|
1870 | if (nelem) { |
---|
1871 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, value, &anynul, |
---|
1872 | &cStatus); |
---|
1873 | } else { |
---|
1874 | if (type == TSHORT) { |
---|
1875 | *((short *)value) = 0; |
---|
1876 | } else if (type == TINT) { |
---|
1877 | *((int *)value) = 0; |
---|
1878 | } else if (type == TFLOAT) { |
---|
1879 | *((float *)value) = 0.0f; |
---|
1880 | } else if (type == TDOUBLE) { |
---|
1881 | *((double *)value) = 0.0; |
---|
1882 | } |
---|
1883 | } |
---|
1884 | } |
---|
1885 | |
---|
1886 | } else if (colnum == 0) { |
---|
1887 | // Read keyword value. |
---|
1888 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
1889 | |
---|
1890 | } else { |
---|
1891 | // Not present. |
---|
1892 | if (type == TSTRING) { |
---|
1893 | strcpy((char *)value, ""); |
---|
1894 | } else if (type == TSHORT) { |
---|
1895 | *((short *)value) = 0; |
---|
1896 | } else if (type == TINT) { |
---|
1897 | *((int *)value) = 0; |
---|
1898 | } else if (type == TFLOAT) { |
---|
1899 | *((float *)value) = 0.0f; |
---|
1900 | } else if (type == TDOUBLE) { |
---|
1901 | *((double *)value) = 0.0; |
---|
1902 | } |
---|
1903 | } |
---|
1904 | |
---|
1905 | return colnum < 0; |
---|
1906 | } |
---|
1907 | |
---|
1908 | //----------------------------------------------------- SDFITSreader::readData |
---|
1909 | |
---|
1910 | // Read data from the SDFITS file. |
---|
1911 | |
---|
1912 | int SDFITSreader::readData( |
---|
1913 | int iData, |
---|
1914 | long iRow, |
---|
1915 | void *value) |
---|
1916 | { |
---|
1917 | char *name = cData[iData].name; |
---|
1918 | int type = cData[iData].type; |
---|
1919 | int colnum = cData[iData].colnum; |
---|
1920 | long nelem = cData[iData].nelem; |
---|
1921 | |
---|
1922 | if (colnum > 0) { |
---|
1923 | // Read the required number of values from the specified row of the table. |
---|
1924 | int anynul; |
---|
1925 | if (type == TSTRING) { |
---|
1926 | if (nelem) { |
---|
1927 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
1928 | &cStatus); |
---|
1929 | } else { |
---|
1930 | strcpy((char *)value, ""); |
---|
1931 | } |
---|
1932 | |
---|
1933 | } else { |
---|
1934 | if (nelem) { |
---|
1935 | fits_read_col(cSDptr, type, colnum, iRow, 1, abs(nelem), 0, value, |
---|
1936 | &anynul, &cStatus); |
---|
1937 | } else { |
---|
1938 | if (type == TSHORT) { |
---|
1939 | *((short *)value) = 0; |
---|
1940 | } else if (type == TINT) { |
---|
1941 | *((int *)value) = 0; |
---|
1942 | } else if (type == TFLOAT) { |
---|
1943 | *((float *)value) = 0.0f; |
---|
1944 | } else if (type == TDOUBLE) { |
---|
1945 | *((double *)value) = 0.0; |
---|
1946 | } |
---|
1947 | } |
---|
1948 | } |
---|
1949 | |
---|
1950 | } else if (colnum == 0) { |
---|
1951 | // Read keyword value. |
---|
1952 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
1953 | |
---|
1954 | } else { |
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1955 | // Not present. |
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1956 | if (type == TSTRING) { |
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1957 | strcpy((char *)value, ""); |
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1958 | } else if (type == TSHORT) { |
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1959 | *((short *)value) = 0; |
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1960 | } else if (type == TINT) { |
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1961 | *((int *)value) = 0; |
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1962 | } else if (type == TFLOAT) { |
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1963 | *((float *)value) = 0.0f; |
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1964 | } else if (type == TDOUBLE) { |
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1965 | *((double *)value) = 0.0; |
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1966 | } |
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1967 | } |
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1968 | |
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1969 | return colnum < 0; |
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1970 | } |
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1971 | |
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1972 | //------------------------------------------------------ SDFITSreader::findCol |
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1973 | |
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1974 | // Locate a parameter in the SDFITS file. |
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1975 | |
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1976 | void SDFITSreader::findCol( |
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1977 | char *name, |
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1978 | int *colnum) |
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1979 | { |
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1980 | *colnum = 0; |
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1981 | int status = 0; |
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1982 | fits_get_colnum(cSDptr, CASESEN, name, colnum, &status); |
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1983 | |
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1984 | if (status) { |
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1985 | // Not a real column - maybe it's virtual. |
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1986 | char card[81]; |
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1987 | |
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1988 | status = 0; |
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1989 | fits_read_card(cSDptr, name, card, &status); |
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1990 | if (status) { |
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1991 | // Not virtual either. |
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1992 | *colnum = -1; |
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1993 | } |
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1994 | |
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1995 | // Clear error messages. |
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1996 | fits_clear_errmsg(); |
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1997 | } |
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1998 | } |
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