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) 2000-2008 |
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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: SDFITSreader.cc,v 19.33 2008-11-17 06:58:34 cal103 Exp $ |
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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 <atnf/pks/pks_maths.h> |
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37 | #include <atnf/PKSIO/PKSmsg.h> |
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38 | #include <atnf/PKSIO/MBrecord.h> |
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39 | #include <atnf/PKSIO/SDFITSreader.h> |
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40 | |
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41 | #include <casa/math.h> |
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42 | #include <casa/stdio.h> |
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43 | #include <cstring> |
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44 | |
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45 | #include <algorithm> |
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46 | #include <strings.h> |
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47 | |
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48 | class FITSparm |
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49 | { |
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50 | public: |
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51 | char *name; // Keyword or column name. |
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52 | int type; // Expected keyvalue or column data type. |
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53 | int colnum; // Column number; 0 for keyword; -1 absent. |
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54 | int coltype; // Column data type, as found. |
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55 | long nelem; // Column data repeat count; < 0 for vardim. |
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56 | int tdimcol; // TDIM column number; 0 for keyword; -1 absent. |
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57 | char units[32]; // Units from TUNITn keyword. |
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58 | }; |
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59 | |
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60 | // Numerical constants. |
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61 | const double PI = 3.141592653589793238462643; |
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62 | |
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63 | // Factor to convert radians to degrees. |
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64 | const double D2R = PI / 180.0; |
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65 | |
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66 | //------------------------------------------------- SDFITSreader::SDFITSreader |
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67 | |
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68 | SDFITSreader::SDFITSreader() |
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69 | { |
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70 | // Default constructor. |
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71 | cSDptr = 0; |
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72 | |
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73 | // Allocate space for data descriptors. |
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74 | cData = new FITSparm[NDATA]; |
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75 | |
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76 | for (int iData = 0; iData < NDATA; iData++) { |
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77 | cData[iData].colnum = -1; |
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78 | } |
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79 | |
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80 | // Initialize pointers. |
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81 | cBeams = 0x0; |
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82 | cIFs = 0x0; |
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83 | cStartChan = 0x0; |
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84 | cEndChan = 0x0; |
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85 | cRefChan = 0x0; |
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86 | |
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87 | // By default, messages are written to stderr. |
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88 | initMsg(); |
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89 | } |
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90 | |
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91 | //------------------------------------------------ SDFITSreader::~SDFITSreader |
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92 | |
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93 | SDFITSreader::~SDFITSreader() |
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94 | { |
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95 | close(); |
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96 | |
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97 | delete [] cData; |
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98 | } |
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99 | |
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100 | //--------------------------------------------------------- SDFITSreader::open |
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101 | |
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102 | // Open an SDFITS file for reading. |
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103 | |
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104 | int SDFITSreader::open( |
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105 | char* sdName, |
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106 | int &nBeam, |
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107 | int* &beams, |
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108 | int &nIF, |
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109 | int* &IFs, |
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110 | int* &nChan, |
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111 | int* &nPol, |
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112 | int* &haveXPol, |
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113 | int &haveBase, |
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114 | int &haveSpectra, |
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115 | int &extraSysCal) |
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116 | { |
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117 | // Clear the message stack. |
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118 | clearMsg(); |
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119 | |
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120 | if (cSDptr) { |
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121 | close(); |
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122 | } |
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123 | |
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124 | // Open the SDFITS file. |
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125 | cStatus = 0; |
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126 | if (fits_open_file(&cSDptr, sdName, READONLY, &cStatus)) { |
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127 | sprintf(cMsg, "ERROR: Failed to open SDFITS file\n %s", sdName); |
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128 | logMsg(cMsg); |
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129 | return 1; |
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130 | } |
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131 | |
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132 | // Move to the SDFITS extension. |
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133 | cALFA = cALFA_BD = cALFA_CIMA = 0; |
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134 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "SINGLE DISH", 0, &cStatus)) { |
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135 | // No SDFITS table, look for BDFITS or CIMAFITS. |
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136 | cStatus = 0; |
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137 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "BDFITS", 0, &cStatus) == 0) { |
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138 | cALFA_BD = 1; |
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139 | |
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140 | } else { |
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141 | cStatus = 0; |
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142 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, "CIMAFITS", 0, &cStatus) == 0) { |
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143 | cALFA_CIMA = 1; |
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144 | |
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145 | // Check for later versions of CIMAFITS. |
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146 | float version; |
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147 | readParm("VERSION", TFLOAT, &version); |
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148 | if (version >= 2.0f) cALFA_CIMA = int(version); |
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149 | |
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150 | } else { |
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151 | logMsg("ERROR: Failed to locate SDFITS binary table."); |
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152 | close(); |
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153 | return 1; |
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154 | } |
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155 | } |
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156 | |
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157 | // Arecibo ALFA data of some kind. |
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158 | cALFA = 1; |
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159 | for (int iBeam = 0; iBeam < 8; iBeam++) { |
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160 | for (int iPol = 0; iPol < 2; iPol++) { |
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161 | cALFAcalOn[iBeam][iPol] = 0.0f; |
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162 | cALFAcalOff[iBeam][iPol] = 0.0f; |
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163 | |
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164 | // Nominal factor to calibrate spectra in Jy. |
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165 | cALFAcal[iBeam][iPol] = 3.0f; |
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166 | } |
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167 | } |
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168 | } |
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169 | |
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170 | // GBT data. |
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171 | char telescope[32]; |
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172 | readParm("TELESCOP", TSTRING, telescope); // Core. |
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173 | cGBT = strncmp(telescope, "GBT", 3) == 0 || |
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174 | strncmp(telescope, "NRAO_GBT", 8) == 0; |
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175 | |
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176 | cRow = 0; |
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177 | |
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178 | |
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179 | // Check that the DATA array column is present. |
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180 | findData(DATA, "DATA", TFLOAT); |
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181 | haveSpectra = cHaveSpectra = cData[DATA].colnum > 0; |
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182 | |
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183 | if (cHaveSpectra) { |
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184 | // Find the number of data axes (must be the same for each IF). |
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185 | cNAxis = 5; |
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186 | if (readDim(DATA, 1, &cNAxis, cNAxes)) { |
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187 | logMsg(); |
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188 | close(); |
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189 | return 1; |
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190 | } |
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191 | |
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192 | if (cALFA_BD) { |
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193 | // ALFA BDFITS: variable length arrays don't actually vary and there is |
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194 | // no TDIM (or MAXISn) card; use the LAGS_IN value. |
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195 | cNAxis = 5; |
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196 | readParm("LAGS_IN", TLONG, cNAxes); |
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197 | cNAxes[1] = 1; |
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198 | cNAxes[2] = 1; |
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199 | cNAxes[3] = 1; |
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200 | cNAxes[4] = 1; |
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201 | cData[DATA].nelem = cNAxes[0]; |
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202 | } |
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203 | |
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204 | if (cNAxis < 4) { |
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205 | // Need at least four axes (for now). |
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206 | logMsg("ERROR: DATA array contains fewer than four axes."); |
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207 | close(); |
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208 | return 1; |
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209 | } else if (cNAxis > 5) { |
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210 | // We support up to five axes. |
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211 | logMsg("ERROR: DATA array contains more than five axes."); |
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212 | close(); |
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213 | return 1; |
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214 | } |
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215 | |
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216 | findData(FLAGGED, "FLAGGED", TBYTE); |
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217 | |
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218 | } else { |
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219 | // DATA column not present, check for a DATAXED keyword. |
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220 | findData(DATAXED, "DATAXED", TSTRING); |
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221 | if (cData[DATAXED].colnum < 0) { |
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222 | logMsg("ERROR: DATA array column absent from binary table."); |
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223 | close(); |
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224 | return 1; |
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225 | } |
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226 | |
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227 | // Determine the number of axes and their length. |
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228 | char dataxed[32]; |
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229 | readParm("DATAXED", TSTRING, dataxed); |
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230 | |
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231 | for (int iaxis = 0; iaxis < 5; iaxis++) cNAxes[iaxis] = 0; |
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232 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxes, cNAxes+1, cNAxes+2, |
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233 | cNAxes+3, cNAxes+4); |
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234 | for (int iaxis = 4; iaxis > -1; iaxis--) { |
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235 | if (cNAxes[iaxis] == 0) cNAxis = iaxis; |
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236 | } |
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237 | } |
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238 | |
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239 | char *CTYPE[5] = {"CTYPE1", "CTYPE2", "CTYPE3", "CTYPE4", "CTYPE5"}; |
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240 | char *CRPIX[5] = {"CRPIX1", "CRPIX2", "CRPIX3", "CRPIX4", "CRPIX5"}; |
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241 | char *CRVAL[5] = {"CRVAL1", "CRVAL2", "CRVAL3", "CRVAL4", "CRVAL5"}; |
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242 | char *CDELT[5] = {"CDELT1", "CDELT2", "CDELT3", "CDELT4", "CDELT5"}; |
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243 | |
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244 | // Find required DATA array axes. |
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245 | char ctype[5][72]; |
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246 | for (int iaxis = 0; iaxis < cNAxis; iaxis++) { |
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247 | strcpy(ctype[iaxis], ""); |
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248 | readParm(CTYPE[iaxis], TSTRING, ctype[iaxis]); // Core. |
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249 | } |
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250 | |
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251 | if (cStatus) { |
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252 | logMsg(); |
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253 | close(); |
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254 | return 1; |
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255 | } |
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256 | |
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257 | char *fqCRPIX = 0; |
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258 | char *fqCRVAL = 0; |
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259 | char *fqCDELT = 0; |
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260 | char *raCRVAL = 0; |
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261 | char *decCRVAL = 0; |
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262 | char *timeCRVAL = 0; |
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263 | char *beamCRVAL = 0; |
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264 | |
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265 | for (int iaxis = 0; iaxis < cNAxis; iaxis++) { |
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266 | if (strncmp(ctype[iaxis], "FREQ", 4) == 0) { |
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267 | cReqax[0] = iaxis; |
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268 | fqCRPIX = CRPIX[iaxis]; |
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269 | fqCRVAL = CRVAL[iaxis]; |
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270 | fqCDELT = CDELT[iaxis]; |
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271 | |
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272 | } else if (strncmp(ctype[iaxis], "STOKES", 6) == 0) { |
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273 | cReqax[1] = iaxis; |
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274 | |
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275 | } else if (strncmp(ctype[iaxis], "RA", 2) == 0) { |
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276 | cReqax[2] = iaxis; |
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277 | raCRVAL = CRVAL[iaxis]; |
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278 | |
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279 | } else if (strncmp(ctype[iaxis], "DEC", 3) == 0) { |
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280 | cReqax[3] = iaxis; |
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281 | decCRVAL = CRVAL[iaxis]; |
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282 | |
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283 | } else if (strcmp(ctype[iaxis], "TIME") == 0) { |
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284 | // TIME (UTC seconds since midnight) can be a keyword or axis type. |
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285 | timeCRVAL = CRVAL[iaxis]; |
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286 | |
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287 | } else if (strcmp(ctype[iaxis], "BEAM") == 0) { |
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288 | // BEAM can be a keyword or axis type. |
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289 | beamCRVAL = CRVAL[iaxis]; |
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290 | } |
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291 | } |
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292 | |
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293 | if (cALFA_BD) { |
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294 | // Fixed in ALFA CIMAFITS. |
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295 | cReqax[2] = 2; |
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296 | raCRVAL = "CRVAL2A"; |
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297 | |
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298 | cReqax[3] = 3; |
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299 | decCRVAL = "CRVAL3A"; |
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300 | } |
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301 | |
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302 | // Check that all are present. |
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303 | for (int iaxis = 0; iaxis < 4; iaxis++) { |
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304 | if (cReqax[iaxis] < 0) { |
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305 | logMsg("ERROR: Could not find required DATA array axes."); |
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306 | close(); |
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307 | return 1; |
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308 | } |
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309 | } |
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310 | |
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311 | // Set up machinery for data retrieval. |
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312 | findData(SCAN, "SCAN", TINT); // Shared. |
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313 | findData(CYCLE, "CYCLE", TINT); // Additional. |
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314 | findData(DATE_OBS, "DATE-OBS", TSTRING); // Core. |
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315 | findData(TIME, "TIME", TDOUBLE); // Core. |
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316 | findData(EXPOSURE, "EXPOSURE", TFLOAT); // Core. |
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317 | findData(OBJECT, "OBJECT", TSTRING); // Core. |
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318 | findData(OBJ_RA, "OBJ-RA", TDOUBLE); // Additional. |
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319 | findData(OBJ_DEC, "OBJ-DEC", TDOUBLE); // Additional. |
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320 | findData(RESTFRQ, "RESTFRQ", TDOUBLE); // Additional. |
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321 | findData(OBSMODE, "OBSMODE", TSTRING); // Shared. |
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322 | |
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323 | findData(BEAM, "BEAM", TSHORT); // Additional. |
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324 | findData(IF, "IF", TSHORT); // Additional. |
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325 | findData(FqRefPix, fqCRPIX, TFLOAT); // Frequency reference pixel. |
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326 | findData(FqRefVal, fqCRVAL, TDOUBLE); // Frequency reference value. |
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327 | findData(FqDelt, fqCDELT, TDOUBLE); // Frequency increment. |
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328 | findData(RA, raCRVAL, TDOUBLE); // Right ascension. |
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329 | findData(DEC, decCRVAL, TDOUBLE); // Declination. |
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330 | findData(SCANRATE, "SCANRATE", TFLOAT); // Additional. |
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331 | |
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332 | findData(TSYS, "TSYS", TFLOAT); // Core. |
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333 | findData(CALFCTR, "CALFCTR", TFLOAT); // Additional. |
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334 | findData(XCALFCTR, "XCALFCTR", TFLOAT); // Additional. |
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335 | findData(BASELIN, "BASELIN", TFLOAT); // Additional. |
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336 | findData(BASESUB, "BASESUB", TFLOAT); // Additional. |
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337 | findData(XPOLDATA, "XPOLDATA", TFLOAT); // Additional. |
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338 | |
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339 | findData(REFBEAM, "REFBEAM", TSHORT); // Additional. |
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340 | findData(TCAL, "TCAL", TFLOAT); // Shared. |
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341 | findData(TCALTIME, "TCALTIME", TSTRING); // Additional. |
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342 | findData(AZIMUTH, "AZIMUTH", TFLOAT); // Shared. |
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343 | findData(ELEVATIO, "ELEVATIO", TFLOAT); // Shared. |
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344 | findData(PARANGLE, "PARANGLE", TFLOAT); // Additional. |
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345 | findData(FOCUSAXI, "FOCUSAXI", TFLOAT); // Additional. |
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346 | findData(FOCUSTAN, "FOCUSTAN", TFLOAT); // Additional. |
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347 | findData(FOCUSROT, "FOCUSROT", TFLOAT); // Additional. |
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348 | findData(TAMBIENT, "TAMBIENT", TFLOAT); // Shared. |
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349 | findData(PRESSURE, "PRESSURE", TFLOAT); // Shared. |
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350 | findData(HUMIDITY, "HUMIDITY", TFLOAT); // Shared. |
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351 | findData(WINDSPEE, "WINDSPEE", TFLOAT); // Shared. |
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352 | findData(WINDDIRE, "WINDDIRE", TFLOAT); // Shared. |
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353 | |
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354 | if (cStatus) { |
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355 | logMsg(); |
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356 | close(); |
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357 | return 1; |
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358 | } |
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359 | |
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360 | |
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361 | // Check for alternative column names. |
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362 | if (cALFA) { |
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363 | // ALFA data. |
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364 | cALFAscan = 0; |
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365 | cScanNo = 0; |
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366 | if (cALFA_CIMA) { |
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367 | findData(SCAN, "SCAN_ID", TINT); |
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368 | if (cALFA_CIMA > 1) { |
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369 | findData(CYCLE, "RECNUM", TINT); |
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370 | } else { |
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371 | findData(CYCLE, "SUBSCAN", TINT); |
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372 | } |
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373 | } else if (cALFA_BD) { |
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374 | findData(SCAN, "SCAN_NUMBER", TINT); |
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375 | findData(CYCLE, "PATTERN_NUMBER", TINT); |
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376 | } |
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377 | } else { |
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378 | readData(SCAN, 1, &cFirstScanNo); |
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379 | } |
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380 | |
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381 | cCycleNo = 0; |
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382 | cLastUTC = 0.0; |
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383 | |
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384 | // Beam number, 1-relative by default. |
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385 | cBeam_1rel = 1; |
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386 | if (cALFA) { |
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387 | // ALFA INPUT_ID, 0-relative (overrides BEAM column if present). |
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388 | findData(BEAM, "INPUT_ID", TSHORT); |
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389 | cBeam_1rel = 0; |
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390 | |
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391 | } else if (cData[BEAM].colnum < 0) { |
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392 | if (beamCRVAL) { |
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393 | // There is a BEAM axis. |
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394 | findData(BEAM, beamCRVAL, TDOUBLE); |
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395 | } else { |
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396 | // ms2sdfits output, 0-relative "feed" number. |
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397 | findData(BEAM, "MAIN_FEED1", TSHORT); |
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398 | cBeam_1rel = 0; |
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399 | } |
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400 | } |
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401 | |
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402 | // IF number, 1-relative by default. |
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403 | cIF_1rel = 1; |
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404 | if (cALFA && cData[IF].colnum < 0) { |
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405 | // ALFA data, 0-relative. |
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406 | if (cALFA_CIMA > 1) { |
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407 | findData(IF, "IFN", TSHORT); |
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408 | } else { |
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409 | findData(IF, "IFVAL", TSHORT); |
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410 | } |
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411 | cIF_1rel = 0; |
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412 | } |
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413 | |
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414 | if (cData[TIME].colnum < 0) { |
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415 | if (timeCRVAL) { |
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416 | // There is a TIME axis. |
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417 | findData(TIME, timeCRVAL, TDOUBLE); |
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418 | } |
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419 | } |
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420 | |
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421 | // ms2sdfits writes a scalar "TSYS" column that averages the polarizations. |
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422 | int colnum; |
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423 | findCol("SYSCAL_TSYS", &colnum); |
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424 | if (colnum > 0) { |
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425 | // This contains the vector Tsys. |
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426 | findData(TSYS, "SYSCAL_TSYS", TFLOAT); |
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427 | } |
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428 | |
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429 | // XPOLDATA? |
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430 | |
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431 | if (cData[SCANRATE].colnum < 0) { |
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432 | findData(SCANRATE, "FIELD_POINTING_DIR_RATE", TFLOAT); |
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433 | } |
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434 | |
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435 | if (cData[RESTFRQ].colnum < 0) { |
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436 | findData(RESTFRQ, "RESTFREQ", TDOUBLE); |
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437 | if (cData[RESTFRQ].colnum < 0) { |
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438 | findData(RESTFRQ, "SPECTRAL_WINDOW_REST_FREQUENCY", TDOUBLE); |
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439 | } |
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440 | } |
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441 | |
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442 | if (cData[OBJ_RA].colnum < 0) { |
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443 | findData(OBJ_RA, "SOURCE_DIRECTION", TDOUBLE); |
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444 | } |
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445 | if (cData[OBJ_DEC].colnum < 0) { |
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446 | findData(OBJ_DEC, "SOURCE_DIRECTION", TDOUBLE); |
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447 | } |
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448 | |
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449 | // REFBEAM? |
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450 | |
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451 | if (cData[TCAL].colnum < 0) { |
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452 | findData(TCAL, "SYSCAL_TCAL", TFLOAT); |
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453 | } else if (cALFA_BD) { |
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454 | // ALFA BDFITS has a different TCAL with 64 elements - kill it! |
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455 | findData(TCAL, "NO NO NO", TFLOAT); |
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456 | } |
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457 | |
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458 | if (cALFA_BD) { |
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459 | // ALFA BDFITS. |
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460 | findData(AZIMUTH, "CRVAL2B", TFLOAT); |
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461 | findData(ELEVATIO, "CRVAL3B", TFLOAT); |
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462 | } |
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463 | |
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464 | if (cALFA) { |
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465 | // ALFA data. |
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466 | findData(PARANGLE, "PARA_ANG", TFLOAT); |
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467 | } |
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468 | |
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469 | if (cData[TAMBIENT].colnum < 0) { |
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470 | findData(TAMBIENT, "WEATHER_TEMPERATURE", TFLOAT); |
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471 | } |
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472 | |
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473 | if (cData[PRESSURE].colnum < 0) { |
---|
474 | findData(PRESSURE, "WEATHER_PRESSURE", TFLOAT); |
---|
475 | } |
---|
476 | |
---|
477 | if (cData[HUMIDITY].colnum < 0) { |
---|
478 | findData(HUMIDITY, "WEATHER_REL_HUMIDITY", TFLOAT); |
---|
479 | } |
---|
480 | |
---|
481 | if (cData[WINDSPEE].colnum < 0) { |
---|
482 | findData(WINDSPEE, "WEATHER_WIND_SPEED", TFLOAT); |
---|
483 | } |
---|
484 | |
---|
485 | if (cData[WINDDIRE].colnum < 0) { |
---|
486 | findData(WINDDIRE, "WEATHER_WIND_DIRECTION", TFLOAT); |
---|
487 | } |
---|
488 | |
---|
489 | |
---|
490 | // Find the number of rows. |
---|
491 | fits_get_num_rows(cSDptr, &cNRow, &cStatus); |
---|
492 | if (!cNRow) { |
---|
493 | logMsg("ERROR: Table contains no entries."); |
---|
494 | close(); |
---|
495 | return 1; |
---|
496 | } |
---|
497 | |
---|
498 | |
---|
499 | // Determine which beams are present in the data. |
---|
500 | if (cData[BEAM].colnum > 0) { |
---|
501 | short *beamCol = new short[cNRow]; |
---|
502 | short beamNul = 1; |
---|
503 | int anynul; |
---|
504 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
505 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
506 | delete [] beamCol; |
---|
507 | logMsg(); |
---|
508 | close(); |
---|
509 | return 1; |
---|
510 | } |
---|
511 | |
---|
512 | // Find the maximum beam number. |
---|
513 | cNBeam = cBeam_1rel - 1; |
---|
514 | for (int irow = 0; irow < cNRow; irow++) { |
---|
515 | if (beamCol[irow] > cNBeam) { |
---|
516 | cNBeam = beamCol[irow]; |
---|
517 | } |
---|
518 | |
---|
519 | // Check validity. |
---|
520 | if (beamCol[irow] < cBeam_1rel) { |
---|
521 | delete [] beamCol; |
---|
522 | logMsg("ERROR: SDFITS file contains invalid beam number."); |
---|
523 | close(); |
---|
524 | return 1; |
---|
525 | } |
---|
526 | } |
---|
527 | |
---|
528 | if (!cBeam_1rel) cNBeam++; |
---|
529 | |
---|
530 | // Find all beams present in the data. |
---|
531 | cBeams = new int[cNBeam]; |
---|
532 | for (int ibeam = 0; ibeam < cNBeam; ibeam++) { |
---|
533 | cBeams[ibeam] = 0; |
---|
534 | } |
---|
535 | |
---|
536 | for (int irow = 0; irow < cNRow; irow++) { |
---|
537 | cBeams[beamCol[irow] - cBeam_1rel] = 1; |
---|
538 | } |
---|
539 | |
---|
540 | delete [] beamCol; |
---|
541 | |
---|
542 | } else { |
---|
543 | // No BEAM column. |
---|
544 | cNBeam = 1; |
---|
545 | cBeams = new int[1]; |
---|
546 | cBeams[0] = 1; |
---|
547 | } |
---|
548 | |
---|
549 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
550 | // modify its elements directly. |
---|
551 | nBeam = cNBeam; |
---|
552 | beams = cBeams; |
---|
553 | |
---|
554 | |
---|
555 | // Determine which IFs are present in the data. |
---|
556 | if (cData[IF].colnum > 0) { |
---|
557 | short *IFCol = new short[cNRow]; |
---|
558 | short IFNul = 1; |
---|
559 | int anynul; |
---|
560 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
561 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
562 | delete [] IFCol; |
---|
563 | logMsg(); |
---|
564 | close(); |
---|
565 | return 1; |
---|
566 | } |
---|
567 | |
---|
568 | // Find the maximum IF number. |
---|
569 | cNIF = cIF_1rel - 1; |
---|
570 | for (int irow = 0; irow < cNRow; irow++) { |
---|
571 | if (IFCol[irow] > cNIF) { |
---|
572 | cNIF = IFCol[irow]; |
---|
573 | } |
---|
574 | |
---|
575 | // Check validity. |
---|
576 | if (IFCol[irow] < cIF_1rel) { |
---|
577 | delete [] IFCol; |
---|
578 | logMsg("ERROR: SDFITS file contains invalid IF number."); |
---|
579 | close(); |
---|
580 | return 1; |
---|
581 | } |
---|
582 | } |
---|
583 | |
---|
584 | if (!cIF_1rel) cNIF++; |
---|
585 | |
---|
586 | // Find all IFs present in the data. |
---|
587 | cIFs = new int[cNIF]; |
---|
588 | cNChan = new int[cNIF]; |
---|
589 | cNPol = new int[cNIF]; |
---|
590 | cHaveXPol = new int[cNIF]; |
---|
591 | cGetXPol = 0; |
---|
592 | |
---|
593 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
594 | cIFs[iIF] = 0; |
---|
595 | cNChan[iIF] = 0; |
---|
596 | cNPol[iIF] = 0; |
---|
597 | cHaveXPol[iIF] = 0; |
---|
598 | } |
---|
599 | |
---|
600 | for (int irow = 0; irow < cNRow; irow++) { |
---|
601 | int iIF = IFCol[irow] - cIF_1rel; |
---|
602 | if (cIFs[iIF] == 0) { |
---|
603 | cIFs[iIF] = 1; |
---|
604 | |
---|
605 | // Find the axis lengths. |
---|
606 | if (cHaveSpectra) { |
---|
607 | if (cData[DATA].nelem < 0) { |
---|
608 | // Variable dimension array. |
---|
609 | if (readDim(DATA, irow+1, &cNAxis, cNAxes)) { |
---|
610 | logMsg(); |
---|
611 | close(); |
---|
612 | return 1; |
---|
613 | } |
---|
614 | } |
---|
615 | |
---|
616 | } else { |
---|
617 | if (cData[DATAXED].colnum > 0) { |
---|
618 | char dataxed[32]; |
---|
619 | readParm("DATAXED", TSTRING, dataxed); |
---|
620 | |
---|
621 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxes, cNAxes+1, |
---|
622 | cNAxes+2, cNAxes+3, cNAxes+4); |
---|
623 | } |
---|
624 | } |
---|
625 | |
---|
626 | // Number of channels and polarizations. |
---|
627 | cNChan[iIF] = cNAxes[cReqax[0]]; |
---|
628 | cNPol[iIF] = cNAxes[cReqax[1]]; |
---|
629 | cHaveXPol[iIF] = 0; |
---|
630 | |
---|
631 | // Is cross-polarization data present? |
---|
632 | if (cData[XPOLDATA].colnum > 0) { |
---|
633 | // Check that it conforms. |
---|
634 | int nAxis; |
---|
635 | long nAxes[2]; |
---|
636 | |
---|
637 | if (readDim(XPOLDATA, irow+1, &nAxis, nAxes)) { |
---|
638 | logMsg(); |
---|
639 | close(); |
---|
640 | return 1; |
---|
641 | } |
---|
642 | |
---|
643 | // Default is to get it if we have it. |
---|
644 | if (nAxis == 2 && |
---|
645 | nAxes[0] == 2 && |
---|
646 | nAxes[1] == cNChan[iIF]) { |
---|
647 | cGetXPol = cHaveXPol[iIF] = 1; |
---|
648 | } |
---|
649 | } |
---|
650 | } |
---|
651 | } |
---|
652 | |
---|
653 | delete [] IFCol; |
---|
654 | |
---|
655 | } else { |
---|
656 | // No IF column. |
---|
657 | cNIF = 1; |
---|
658 | cIFs = new int[1]; |
---|
659 | cIFs[0] = 1; |
---|
660 | |
---|
661 | cNChan = new int[1]; |
---|
662 | cNPol = new int[1]; |
---|
663 | cHaveXPol = new int[1]; |
---|
664 | cGetXPol = 0; |
---|
665 | |
---|
666 | // Number of channels and polarizations. |
---|
667 | cNChan[0] = cNAxes[cReqax[0]]; |
---|
668 | cNPol[0] = cNAxes[cReqax[1]]; |
---|
669 | cHaveXPol[0] = 0; |
---|
670 | } |
---|
671 | |
---|
672 | if (cALFA && cALFA_CIMA < 2) { |
---|
673 | // Older ALFA data labels each polarization as a separate IF. |
---|
674 | cNPol[0] = cNIF; |
---|
675 | cNIF = 1; |
---|
676 | } |
---|
677 | |
---|
678 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
679 | // modify its elements directly. |
---|
680 | nIF = cNIF; |
---|
681 | IFs = cIFs; |
---|
682 | |
---|
683 | nChan = cNChan; |
---|
684 | nPol = cNPol; |
---|
685 | haveXPol = cHaveXPol; |
---|
686 | |
---|
687 | |
---|
688 | // Default channel range selection. |
---|
689 | cStartChan = new int[cNIF]; |
---|
690 | cEndChan = new int[cNIF]; |
---|
691 | cRefChan = new int[cNIF]; |
---|
692 | |
---|
693 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
694 | cStartChan[iIF] = 1; |
---|
695 | cEndChan[iIF] = cNChan[iIF]; |
---|
696 | cRefChan[iIF] = cNChan[iIF]/2 + 1; |
---|
697 | } |
---|
698 | |
---|
699 | // Default is to get it if we have it. |
---|
700 | cGetSpectra = cHaveSpectra; |
---|
701 | |
---|
702 | |
---|
703 | // Are baseline parameters present? |
---|
704 | cHaveBase = 0; |
---|
705 | if (cData[BASELIN].colnum) { |
---|
706 | // Check that it conforms. |
---|
707 | int nAxis, status = 0; |
---|
708 | long nAxes[2]; |
---|
709 | |
---|
710 | if (fits_read_tdim(cSDptr, cData[BASELIN].colnum, 2, &nAxis, nAxes, |
---|
711 | &status) == 0) { |
---|
712 | cHaveBase = (nAxis == 2); |
---|
713 | } |
---|
714 | } |
---|
715 | haveBase = cHaveBase; |
---|
716 | |
---|
717 | |
---|
718 | // Is extra system calibration data available? |
---|
719 | cExtraSysCal = 0; |
---|
720 | for (int iparm = REFBEAM; iparm < NDATA; iparm++) { |
---|
721 | if (cData[iparm].colnum >= 0) { |
---|
722 | cExtraSysCal = 1; |
---|
723 | break; |
---|
724 | } |
---|
725 | } |
---|
726 | |
---|
727 | extraSysCal = cExtraSysCal; |
---|
728 | |
---|
729 | return 0; |
---|
730 | } |
---|
731 | |
---|
732 | //---------------------------------------------------- SDFITSreader::getHeader |
---|
733 | |
---|
734 | // Get parameters describing the data. |
---|
735 | |
---|
736 | int SDFITSreader::getHeader( |
---|
737 | char observer[32], |
---|
738 | char project[32], |
---|
739 | char telescope[32], |
---|
740 | double antPos[3], |
---|
741 | char obsMode[32], |
---|
742 | char bunit[32], |
---|
743 | float &equinox, |
---|
744 | char radecsys[32], |
---|
745 | char dopplerFrame[32], |
---|
746 | char datobs[32], |
---|
747 | double &utc, |
---|
748 | double &refFreq, |
---|
749 | double &bandwidth) |
---|
750 | { |
---|
751 | // Has the file been opened? |
---|
752 | if (!cSDptr) { |
---|
753 | return 1; |
---|
754 | } |
---|
755 | |
---|
756 | // Read parameter values. |
---|
757 | readParm("OBSERVER", TSTRING, observer); // Shared. |
---|
758 | readParm("PROJID", TSTRING, project); // Shared. |
---|
759 | readParm("TELESCOP", TSTRING, telescope); // Core. |
---|
760 | |
---|
761 | antPos[0] = 0.0; |
---|
762 | antPos[1] = 0.0; |
---|
763 | antPos[2] = 0.0; |
---|
764 | if (readParm("ANTENNA_POSITION", TDOUBLE, antPos)) { |
---|
765 | readParm("OBSGEO-X", TDOUBLE, antPos); // Additional. |
---|
766 | readParm("OBSGEO-Y", TDOUBLE, antPos + 1); // Additional. |
---|
767 | readParm("OBSGEO-Z", TDOUBLE, antPos + 2); // Additional. |
---|
768 | } |
---|
769 | |
---|
770 | if (antPos[0] == 0.0) { |
---|
771 | if (strncmp(telescope, "ATPKS", 5) == 0) { |
---|
772 | // Parkes coordinates. |
---|
773 | antPos[0] = -4554232.087; |
---|
774 | antPos[1] = 2816759.046; |
---|
775 | antPos[2] = -3454035.950; |
---|
776 | } else if (strncmp(telescope, "ATMOPRA", 7) == 0) { |
---|
777 | // Mopra coordinates. |
---|
778 | antPos[0] = -4682768.630; |
---|
779 | antPos[1] = 2802619.060; |
---|
780 | antPos[2] = -3291759.900; |
---|
781 | } else if (strncmp(telescope, "ARECIBO", 7) == 0) { |
---|
782 | // Arecibo coordinates. |
---|
783 | antPos[0] = 2390486.900; |
---|
784 | antPos[1] = -5564731.440; |
---|
785 | antPos[2] = 1994720.450; |
---|
786 | } |
---|
787 | } |
---|
788 | |
---|
789 | readData(OBSMODE, 1, obsMode); // Shared. |
---|
790 | |
---|
791 | // Brightness unit. |
---|
792 | if (cData[DATAXED].colnum >= 0) { |
---|
793 | strcpy(bunit, "Jy"); |
---|
794 | } else { |
---|
795 | strcpy(bunit, cData[DATA].units); |
---|
796 | } |
---|
797 | |
---|
798 | if (strcmp(bunit, "JY") == 0) { |
---|
799 | bunit[1] = 'y'; |
---|
800 | } else if (strcmp(bunit, "JY/BEAM") == 0) { |
---|
801 | strcpy(bunit, "Jy/beam"); |
---|
802 | } |
---|
803 | |
---|
804 | readParm("EQUINOX", TFLOAT, &equinox); // Shared. |
---|
805 | if (cStatus == 405) { |
---|
806 | // EQUINOX was written as string value in early versions. |
---|
807 | cStatus = 0; |
---|
808 | char strtmp[32]; |
---|
809 | readParm("EQUINOX", TSTRING, strtmp); |
---|
810 | sscanf(strtmp, "%f", &equinox); |
---|
811 | } |
---|
812 | |
---|
813 | if (readParm("RADESYS", TSTRING, radecsys)) { // Additional. |
---|
814 | if (readParm("RADECSYS", TSTRING, radecsys)) { // Additional. |
---|
815 | strcpy(radecsys, ""); |
---|
816 | } |
---|
817 | } |
---|
818 | |
---|
819 | if (readParm("SPECSYS", TSTRING, dopplerFrame)) { // Additional. |
---|
820 | // Fallback value. |
---|
821 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
822 | |
---|
823 | // Look for VELFRAME, written by earlier versions of Livedata. |
---|
824 | if (readParm("VELFRAME", TSTRING, dopplerFrame)) { // Additional. |
---|
825 | // No, try digging it out of the CTYPE card (AIPS convention). |
---|
826 | char keyw[9], ctype[9]; |
---|
827 | sprintf(keyw, "CTYPE%ld", cReqax[0]+1); |
---|
828 | readParm(keyw, TSTRING, ctype); |
---|
829 | |
---|
830 | if (strncmp(ctype, "FREQ-", 5) == 0) { |
---|
831 | strcpy(dopplerFrame, ctype+5); |
---|
832 | if (strcmp(dopplerFrame, "LSR") == 0) { |
---|
833 | // LSR unqualified usually means LSR (kinematic). |
---|
834 | strcpy(dopplerFrame, "LSRK"); |
---|
835 | } else if (strcmp(dopplerFrame, "HEL") == 0) { |
---|
836 | // Almost certainly barycentric. |
---|
837 | strcpy(dopplerFrame, "BARYCENT"); |
---|
838 | } |
---|
839 | } else { |
---|
840 | strcpy(dopplerFrame, ""); |
---|
841 | } |
---|
842 | } |
---|
843 | |
---|
844 | // Translate to FITS standard names. |
---|
845 | if (strncmp(dopplerFrame, "TOP", 3) == 0) { |
---|
846 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
847 | } else if (strncmp(dopplerFrame, "GEO", 3) == 0) { |
---|
848 | strcpy(dopplerFrame, "GEOCENTR"); |
---|
849 | } else if (strncmp(dopplerFrame, "HEL", 3) == 0) { |
---|
850 | strcpy(dopplerFrame, "HELIOCEN"); |
---|
851 | } else if (strncmp(dopplerFrame, "BARY", 4) == 0) { |
---|
852 | strcpy(dopplerFrame, "BARYCENT"); |
---|
853 | } |
---|
854 | } |
---|
855 | |
---|
856 | if (cStatus) { |
---|
857 | logMsg(); |
---|
858 | return 1; |
---|
859 | } |
---|
860 | |
---|
861 | // Get parameters from first row of table. |
---|
862 | readData(DATE_OBS, 1, datobs); |
---|
863 | readData(TIME, 1, &utc); |
---|
864 | readData(FqRefVal, 1, &refFreq); |
---|
865 | readParm("BANDWID", TDOUBLE, &bandwidth); // Core. |
---|
866 | |
---|
867 | if (cALFA_BD) utc *= 3600.0; |
---|
868 | |
---|
869 | if (cStatus) { |
---|
870 | logMsg(); |
---|
871 | return 1; |
---|
872 | } |
---|
873 | |
---|
874 | // Check DATE-OBS format. |
---|
875 | if (datobs[2] == '/') { |
---|
876 | // Translate an old-format DATE-OBS. |
---|
877 | datobs[9] = datobs[1]; |
---|
878 | datobs[8] = datobs[0]; |
---|
879 | datobs[2] = datobs[6]; |
---|
880 | datobs[5] = datobs[3]; |
---|
881 | datobs[3] = datobs[7]; |
---|
882 | datobs[6] = datobs[4]; |
---|
883 | datobs[7] = '-'; |
---|
884 | datobs[4] = '-'; |
---|
885 | datobs[1] = '9'; |
---|
886 | datobs[0] = '1'; |
---|
887 | datobs[10] = '\0'; |
---|
888 | |
---|
889 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
890 | // Dig UTC out of a new-format DATE-OBS. |
---|
891 | int hh, mm; |
---|
892 | float ss; |
---|
893 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
894 | utc = (hh*60 + mm)*60 + ss; |
---|
895 | datobs[10] = '\0'; |
---|
896 | } |
---|
897 | |
---|
898 | return 0; |
---|
899 | } |
---|
900 | |
---|
901 | //-------------------------------------------------- SDFITSreader::getFreqInfo |
---|
902 | |
---|
903 | // Get frequency parameters for each IF. |
---|
904 | |
---|
905 | int SDFITSreader::getFreqInfo( |
---|
906 | int &nIF, |
---|
907 | double* &startFreq, |
---|
908 | double* &endFreq) |
---|
909 | { |
---|
910 | float fqRefPix; |
---|
911 | double fqDelt, fqRefVal; |
---|
912 | |
---|
913 | nIF = cNIF; |
---|
914 | startFreq = new double[nIF]; |
---|
915 | endFreq = new double[nIF]; |
---|
916 | |
---|
917 | if (cData[IF].colnum > 0) { |
---|
918 | short *IFCol = new short[cNRow]; |
---|
919 | short IFNul = 1; |
---|
920 | int anynul; |
---|
921 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
922 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
923 | delete [] IFCol; |
---|
924 | logMsg(); |
---|
925 | close(); |
---|
926 | return 1; |
---|
927 | } |
---|
928 | |
---|
929 | for (int iIF = 0; iIF < nIF; iIF++) { |
---|
930 | if (cIFs[iIF]) { |
---|
931 | // Find the first occurrence of this IF in the table. |
---|
932 | int IFno = iIF + cIF_1rel; |
---|
933 | for (int irow = 0; irow < cNRow;) { |
---|
934 | if (IFCol[irow++] == IFno) { |
---|
935 | readData(FqRefPix, irow, &fqRefPix); |
---|
936 | readData(FqRefVal, irow, &fqRefVal); |
---|
937 | readData(FqDelt, irow, &fqDelt); |
---|
938 | |
---|
939 | if (cALFA_BD) { |
---|
940 | unsigned char invert; |
---|
941 | readData("UPPERSB", TBYTE, irow, &invert); |
---|
942 | |
---|
943 | if (invert) { |
---|
944 | fqDelt = -fqDelt; |
---|
945 | } |
---|
946 | } |
---|
947 | |
---|
948 | startFreq[iIF] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
949 | endFreq[iIF] = fqRefVal + (cNChan[iIF] - fqRefPix) * fqDelt; |
---|
950 | |
---|
951 | break; |
---|
952 | } |
---|
953 | } |
---|
954 | |
---|
955 | } else { |
---|
956 | startFreq[iIF] = 0.0; |
---|
957 | endFreq[iIF] = 0.0; |
---|
958 | } |
---|
959 | } |
---|
960 | |
---|
961 | delete [] IFCol; |
---|
962 | |
---|
963 | } else { |
---|
964 | // No IF column, read the first table entry. |
---|
965 | readData(FqRefPix, 1, &fqRefPix); |
---|
966 | readData(FqRefVal, 1, &fqRefVal); |
---|
967 | readData(FqDelt, 1, &fqDelt); |
---|
968 | |
---|
969 | startFreq[0] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
970 | endFreq[0] = fqRefVal + (cNChan[0] - fqRefPix) * fqDelt; |
---|
971 | } |
---|
972 | |
---|
973 | return cStatus; |
---|
974 | } |
---|
975 | |
---|
976 | //---------------------------------------------------- SDFITSreader::findRange |
---|
977 | |
---|
978 | // Find the range of the data in time and position. |
---|
979 | |
---|
980 | int SDFITSreader::findRange( |
---|
981 | int &nRow, |
---|
982 | int &nSel, |
---|
983 | char dateSpan[2][32], |
---|
984 | double utcSpan[2], |
---|
985 | double* &positions) |
---|
986 | { |
---|
987 | // Has the file been opened? |
---|
988 | if (!cSDptr) { |
---|
989 | return 1; |
---|
990 | } |
---|
991 | |
---|
992 | nRow = cNRow; |
---|
993 | |
---|
994 | // Find the number of rows selected. |
---|
995 | short *sel = new short[nRow]; |
---|
996 | for (int irow = 0; irow < nRow; irow++) { |
---|
997 | sel[irow] = 1; |
---|
998 | } |
---|
999 | |
---|
1000 | int anynul; |
---|
1001 | if (cData[BEAM].colnum > 0) { |
---|
1002 | short *beamCol = new short[cNRow]; |
---|
1003 | short beamNul = 1; |
---|
1004 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
1005 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
1006 | delete [] beamCol; |
---|
1007 | delete [] sel; |
---|
1008 | logMsg(); |
---|
1009 | return 1; |
---|
1010 | } |
---|
1011 | |
---|
1012 | for (int irow = 0; irow < nRow; irow++) { |
---|
1013 | if (!cBeams[beamCol[irow]-cBeam_1rel]) { |
---|
1014 | sel[irow] = 0; |
---|
1015 | } |
---|
1016 | } |
---|
1017 | |
---|
1018 | delete [] beamCol; |
---|
1019 | } |
---|
1020 | |
---|
1021 | if (cData[IF].colnum > 0) { |
---|
1022 | short *IFCol = new short[cNRow]; |
---|
1023 | short IFNul = 1; |
---|
1024 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
1025 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
1026 | delete [] IFCol; |
---|
1027 | delete [] sel; |
---|
1028 | logMsg(); |
---|
1029 | return 1; |
---|
1030 | } |
---|
1031 | |
---|
1032 | for (int irow = 0; irow < nRow; irow++) { |
---|
1033 | if (!cIFs[IFCol[irow]-cIF_1rel]) { |
---|
1034 | sel[irow] = 0; |
---|
1035 | } |
---|
1036 | } |
---|
1037 | |
---|
1038 | delete [] IFCol; |
---|
1039 | } |
---|
1040 | |
---|
1041 | nSel = 0; |
---|
1042 | for (int irow = 0; irow < nRow; irow++) { |
---|
1043 | nSel += sel[irow]; |
---|
1044 | } |
---|
1045 | |
---|
1046 | |
---|
1047 | // Find the time range assuming the data is in chronological order. |
---|
1048 | readData(DATE_OBS, 1, dateSpan[0]); |
---|
1049 | readData(DATE_OBS, nRow, dateSpan[1]); |
---|
1050 | readData(TIME, 1, utcSpan); |
---|
1051 | readData(TIME, nRow, utcSpan+1); |
---|
1052 | |
---|
1053 | if (cALFA_BD) { |
---|
1054 | utcSpan[0] *= 3600.0; |
---|
1055 | utcSpan[1] *= 3600.0; |
---|
1056 | } |
---|
1057 | |
---|
1058 | // Check DATE-OBS format. |
---|
1059 | for (int i = 0; i < 2; i++) { |
---|
1060 | if (dateSpan[0][2] == '/') { |
---|
1061 | // Translate an old-format DATE-OBS. |
---|
1062 | dateSpan[i][9] = dateSpan[i][1]; |
---|
1063 | dateSpan[i][8] = dateSpan[i][0]; |
---|
1064 | dateSpan[i][2] = dateSpan[i][6]; |
---|
1065 | dateSpan[i][5] = dateSpan[i][3]; |
---|
1066 | dateSpan[i][3] = dateSpan[i][7]; |
---|
1067 | dateSpan[i][6] = dateSpan[i][4]; |
---|
1068 | dateSpan[i][7] = '-'; |
---|
1069 | dateSpan[i][4] = '-'; |
---|
1070 | dateSpan[i][1] = '9'; |
---|
1071 | dateSpan[i][0] = '1'; |
---|
1072 | dateSpan[i][10] = '\0'; |
---|
1073 | } |
---|
1074 | |
---|
1075 | if (dateSpan[i][10] == 'T' && cData[TIME].colnum < 0) { |
---|
1076 | // Dig UTC out of a new-format DATE-OBS. |
---|
1077 | int hh, mm; |
---|
1078 | float ss; |
---|
1079 | sscanf(dateSpan[i]+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
1080 | utcSpan[i] = (hh*60 + mm)*60 + ss; |
---|
1081 | } |
---|
1082 | } |
---|
1083 | |
---|
1084 | |
---|
1085 | // Retrieve positions for selected data. |
---|
1086 | int isel = 0; |
---|
1087 | positions = new double[2*nSel]; |
---|
1088 | |
---|
1089 | if (cCoordSys == 1) { |
---|
1090 | // Vertical (Az,El). |
---|
1091 | if (cData[AZIMUTH].colnum < 1 || |
---|
1092 | cData[ELEVATIO].colnum < 1) { |
---|
1093 | logMsg("WARNING: Azimuth/elevation information absent."); |
---|
1094 | cStatus = -1; |
---|
1095 | |
---|
1096 | } else { |
---|
1097 | float *az = new float[cNRow]; |
---|
1098 | float *el = new float[cNRow]; |
---|
1099 | fits_read_col(cSDptr, TFLOAT, cData[AZIMUTH].colnum, 1, 1, nRow, 0, az, |
---|
1100 | &anynul, &cStatus); |
---|
1101 | fits_read_col(cSDptr, TFLOAT, cData[ELEVATIO].colnum, 1, 1, nRow, 0, el, |
---|
1102 | &anynul, &cStatus); |
---|
1103 | |
---|
1104 | if (!cStatus) { |
---|
1105 | for (int irow = 0; irow < nRow; irow++) { |
---|
1106 | if (sel[irow]) { |
---|
1107 | positions[isel++] = az[irow] * D2R; |
---|
1108 | positions[isel++] = el[irow] * D2R; |
---|
1109 | } |
---|
1110 | } |
---|
1111 | } |
---|
1112 | |
---|
1113 | delete [] az; |
---|
1114 | delete [] el; |
---|
1115 | } |
---|
1116 | |
---|
1117 | } else { |
---|
1118 | double *ra = new double[cNRow]; |
---|
1119 | double *dec = new double[cNRow]; |
---|
1120 | fits_read_col(cSDptr, TDOUBLE, cData[RA].colnum, 1, 1, nRow, 0, ra, |
---|
1121 | &anynul, &cStatus); |
---|
1122 | fits_read_col(cSDptr, TDOUBLE, cData[DEC].colnum, 1, 1, nRow, 0, dec, |
---|
1123 | &anynul, &cStatus); |
---|
1124 | if (cStatus) { |
---|
1125 | delete [] ra; |
---|
1126 | delete [] dec; |
---|
1127 | goto cleanup; |
---|
1128 | } |
---|
1129 | |
---|
1130 | if (cALFA_BD) { |
---|
1131 | for (int irow = 0; irow < nRow; irow++) { |
---|
1132 | // Convert hours to degrees. |
---|
1133 | ra[irow] *= 15.0; |
---|
1134 | } |
---|
1135 | } |
---|
1136 | |
---|
1137 | if (cCoordSys == 0) { |
---|
1138 | // Equatorial (RA,Dec). |
---|
1139 | for (int irow = 0; irow < nRow; irow++) { |
---|
1140 | if (sel[irow]) { |
---|
1141 | positions[isel++] = ra[irow] * D2R; |
---|
1142 | positions[isel++] = dec[irow] * D2R; |
---|
1143 | } |
---|
1144 | } |
---|
1145 | |
---|
1146 | } else if (cCoordSys == 2) { |
---|
1147 | // Feed-plane. |
---|
1148 | if (cData[OBJ_RA].colnum < 0 || |
---|
1149 | cData[OBJ_DEC].colnum < 0 || |
---|
1150 | cData[PARANGLE].colnum < 1 || |
---|
1151 | cData[FOCUSROT].colnum < 1) { |
---|
1152 | logMsg("WARNING: Insufficient information to compute feed-plane\n" |
---|
1153 | " coordinates."); |
---|
1154 | cStatus = -1; |
---|
1155 | |
---|
1156 | } else { |
---|
1157 | double *srcRA = new double[cNRow]; |
---|
1158 | double *srcDec = new double[cNRow]; |
---|
1159 | float *par = new float[cNRow]; |
---|
1160 | float *rot = new float[cNRow]; |
---|
1161 | |
---|
1162 | if (cData[OBJ_RA].colnum == 0) { |
---|
1163 | // Header keyword. |
---|
1164 | readData(OBJ_RA, 0, srcRA); |
---|
1165 | for (int irow = 1; irow < nRow; irow++) { |
---|
1166 | srcRA[irow] = *srcRA; |
---|
1167 | } |
---|
1168 | } else { |
---|
1169 | // Table column. |
---|
1170 | fits_read_col(cSDptr, TDOUBLE, cData[OBJ_RA].colnum, 1, 1, nRow, |
---|
1171 | 0, srcRA, &anynul, &cStatus); |
---|
1172 | } |
---|
1173 | |
---|
1174 | if (cData[OBJ_DEC].colnum == 0) { |
---|
1175 | // Header keyword. |
---|
1176 | readData(OBJ_DEC, 0, srcDec); |
---|
1177 | for (int irow = 1; irow < nRow; irow++) { |
---|
1178 | srcDec[irow] = *srcDec; |
---|
1179 | } |
---|
1180 | } else { |
---|
1181 | // Table column. |
---|
1182 | fits_read_col(cSDptr, TDOUBLE, cData[OBJ_DEC].colnum, 1, 1, nRow, |
---|
1183 | 0, srcDec, &anynul, &cStatus); |
---|
1184 | } |
---|
1185 | |
---|
1186 | fits_read_col(cSDptr, TFLOAT, cData[PARANGLE].colnum, 1, 1, nRow, 0, |
---|
1187 | par, &anynul, &cStatus); |
---|
1188 | fits_read_col(cSDptr, TFLOAT, cData[FOCUSROT].colnum, 1, 1, nRow, 0, |
---|
1189 | rot, &anynul, &cStatus); |
---|
1190 | |
---|
1191 | if (!cStatus) { |
---|
1192 | for (int irow = 0; irow < nRow; irow++) { |
---|
1193 | if (sel[irow]) { |
---|
1194 | // Convert to feed-plane coordinates. |
---|
1195 | Double dist, pa; |
---|
1196 | distPA(ra[irow]*D2R, dec[irow]*D2R, srcRA[irow]*D2R, |
---|
1197 | srcDec[irow]*D2R, dist, pa); |
---|
1198 | |
---|
1199 | Double spin = (par[irow] + rot[irow])*D2R - pa + PI; |
---|
1200 | if (spin > 2.0*PI) spin -= 2.0*PI; |
---|
1201 | Double squint = PI/2.0 - dist; |
---|
1202 | |
---|
1203 | positions[isel++] = spin; |
---|
1204 | positions[isel++] = squint; |
---|
1205 | } |
---|
1206 | } |
---|
1207 | } |
---|
1208 | |
---|
1209 | delete [] srcRA; |
---|
1210 | delete [] srcDec; |
---|
1211 | delete [] par; |
---|
1212 | delete [] rot; |
---|
1213 | } |
---|
1214 | } |
---|
1215 | |
---|
1216 | delete [] ra; |
---|
1217 | delete [] dec; |
---|
1218 | } |
---|
1219 | |
---|
1220 | cleanup: |
---|
1221 | delete [] sel; |
---|
1222 | |
---|
1223 | if (cStatus) { |
---|
1224 | nSel = 0; |
---|
1225 | delete [] positions; |
---|
1226 | logMsg(); |
---|
1227 | cStatus = 0; |
---|
1228 | return 1; |
---|
1229 | } |
---|
1230 | |
---|
1231 | return 0; |
---|
1232 | } |
---|
1233 | |
---|
1234 | |
---|
1235 | //--------------------------------------------------------- SDFITSreader::read |
---|
1236 | |
---|
1237 | // Read the next data record. |
---|
1238 | |
---|
1239 | int SDFITSreader::read( |
---|
1240 | MBrecord &mbrec) |
---|
1241 | { |
---|
1242 | // Has the file been opened? |
---|
1243 | if (!cSDptr) { |
---|
1244 | return 1; |
---|
1245 | } |
---|
1246 | |
---|
1247 | // Find the next selected beam and IF. |
---|
1248 | short iBeam = 0, iIF = 0; |
---|
1249 | while (++cRow <= cNRow) { |
---|
1250 | if (cData[BEAM].colnum > 0) { |
---|
1251 | readData(BEAM, cRow, &iBeam); |
---|
1252 | |
---|
1253 | // Convert to 0-relative. |
---|
1254 | if (cBeam_1rel) iBeam--; |
---|
1255 | } |
---|
1256 | |
---|
1257 | |
---|
1258 | if (cBeams[iBeam]) { |
---|
1259 | if (cData[IF].colnum > 0) { |
---|
1260 | readData(IF, cRow, &iIF); |
---|
1261 | |
---|
1262 | // Convert to 0-relative. |
---|
1263 | if (cIF_1rel) iIF--; |
---|
1264 | } |
---|
1265 | |
---|
1266 | if (cIFs[iIF]) { |
---|
1267 | if (cALFA) { |
---|
1268 | // ALFA data, check for calibration data. |
---|
1269 | char chars[32]; |
---|
1270 | readData(OBSMODE, cRow, chars); |
---|
1271 | if (strcmp(chars, "CAL") == 0) { |
---|
1272 | if (cALFA_CIMA > 1) { |
---|
1273 | for (short iPol = 0; iPol < cNPol[iIF]; iPol++) { |
---|
1274 | alfaCal(iBeam, iIF, iPol); |
---|
1275 | } |
---|
1276 | continue; |
---|
1277 | } else { |
---|
1278 | // iIF is really the polarization in older ALFA data. |
---|
1279 | alfaCal(iBeam, 0, iIF); |
---|
1280 | continue; |
---|
1281 | } |
---|
1282 | } |
---|
1283 | } |
---|
1284 | |
---|
1285 | break; |
---|
1286 | } |
---|
1287 | } |
---|
1288 | } |
---|
1289 | |
---|
1290 | // EOF? |
---|
1291 | if (cRow > cNRow) { |
---|
1292 | return -1; |
---|
1293 | } |
---|
1294 | |
---|
1295 | |
---|
1296 | if (cALFA) { |
---|
1297 | int scanNo; |
---|
1298 | readData(SCAN, cRow, &scanNo); |
---|
1299 | if (scanNo != cALFAscan) { |
---|
1300 | cScanNo++; |
---|
1301 | cALFAscan = scanNo; |
---|
1302 | } |
---|
1303 | mbrec.scanNo = cScanNo; |
---|
1304 | |
---|
1305 | } else { |
---|
1306 | readData(SCAN, cRow, &mbrec.scanNo); |
---|
1307 | |
---|
1308 | // Ensure that scan number is 1-relative. |
---|
1309 | mbrec.scanNo -= (cFirstScanNo - 1); |
---|
1310 | } |
---|
1311 | |
---|
1312 | // Times. |
---|
1313 | char datobs[32]; |
---|
1314 | readData(DATE_OBS, cRow, datobs); |
---|
1315 | readData(TIME, cRow, &mbrec.utc); |
---|
1316 | if (cALFA_BD) mbrec.utc *= 3600.0; |
---|
1317 | |
---|
1318 | if (datobs[2] == '/') { |
---|
1319 | // Translate an old-format DATE-OBS. |
---|
1320 | datobs[9] = datobs[1]; |
---|
1321 | datobs[8] = datobs[0]; |
---|
1322 | datobs[2] = datobs[6]; |
---|
1323 | datobs[5] = datobs[3]; |
---|
1324 | datobs[3] = datobs[7]; |
---|
1325 | datobs[6] = datobs[4]; |
---|
1326 | datobs[7] = '-'; |
---|
1327 | datobs[4] = '-'; |
---|
1328 | datobs[1] = '9'; |
---|
1329 | datobs[0] = '1'; |
---|
1330 | |
---|
1331 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
1332 | // Dig UTC out of a new-format DATE-OBS. |
---|
1333 | int hh, mm; |
---|
1334 | float ss; |
---|
1335 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
1336 | mbrec.utc = (hh*60 + mm)*60 + ss; |
---|
1337 | } |
---|
1338 | |
---|
1339 | datobs[10] = '\0'; |
---|
1340 | strcpy(mbrec.datobs, datobs); |
---|
1341 | |
---|
1342 | if (cData[CYCLE].colnum > 0) { |
---|
1343 | readData(CYCLE, cRow, &mbrec.cycleNo); |
---|
1344 | if (cALFA_BD) mbrec.cycleNo++; |
---|
1345 | } else { |
---|
1346 | // Cycle number not recorded, must do our own bookkeeping. |
---|
1347 | if (mbrec.utc != cLastUTC) { |
---|
1348 | mbrec.cycleNo = ++cCycleNo; |
---|
1349 | cLastUTC = mbrec.utc; |
---|
1350 | } |
---|
1351 | } |
---|
1352 | |
---|
1353 | readData(EXPOSURE, cRow, &mbrec.exposure); |
---|
1354 | |
---|
1355 | // Source identification. |
---|
1356 | readData(OBJECT, cRow, mbrec.srcName); |
---|
1357 | |
---|
1358 | readData(OBJ_RA, cRow, &mbrec.srcRA); |
---|
1359 | if (strcmp(cData[OBJ_RA].name, "OBJ-RA") == 0) { |
---|
1360 | mbrec.srcRA *= D2R; |
---|
1361 | } |
---|
1362 | |
---|
1363 | if (strcmp(cData[OBJ_DEC].name, "OBJ-DEC") == 0) { |
---|
1364 | readData(OBJ_DEC, cRow, &mbrec.srcDec); |
---|
1365 | mbrec.srcDec *= D2R; |
---|
1366 | } |
---|
1367 | |
---|
1368 | // Line rest frequency (Hz). |
---|
1369 | readData(RESTFRQ, cRow, &mbrec.restFreq); |
---|
1370 | if (mbrec.restFreq == 0.0 && cALFA_BD) { |
---|
1371 | mbrec.restFreq = 1420.40575e6; |
---|
1372 | } |
---|
1373 | |
---|
1374 | // Observation mode. |
---|
1375 | readData(OBSMODE, cRow, mbrec.obsType); |
---|
1376 | |
---|
1377 | // Beam-dependent parameters. |
---|
1378 | mbrec.beamNo = iBeam + 1; |
---|
1379 | |
---|
1380 | readData(RA, cRow, &mbrec.ra); |
---|
1381 | readData(DEC, cRow, &mbrec.dec); |
---|
1382 | mbrec.ra *= D2R; |
---|
1383 | mbrec.dec *= D2R; |
---|
1384 | |
---|
1385 | if (cALFA_BD) mbrec.ra *= 15.0; |
---|
1386 | |
---|
1387 | float scanrate[2]; |
---|
1388 | readData(SCANRATE, cRow, &scanrate); |
---|
1389 | if (strcmp(cData[SCANRATE].name, "SCANRATE") == 0) { |
---|
1390 | mbrec.raRate = scanrate[0] * D2R; |
---|
1391 | mbrec.decRate = scanrate[1] * D2R; |
---|
1392 | } |
---|
1393 | mbrec.paRate = 0.0f; |
---|
1394 | |
---|
1395 | // IF-dependent parameters. |
---|
1396 | int startChan = cStartChan[iIF]; |
---|
1397 | int endChan = cEndChan[iIF]; |
---|
1398 | int refChan = cRefChan[iIF]; |
---|
1399 | |
---|
1400 | // Allocate data storage. |
---|
1401 | int nChan = abs(endChan - startChan) + 1; |
---|
1402 | int nPol = cNPol[iIF]; |
---|
1403 | |
---|
1404 | if (cGetSpectra || cGetXPol) { |
---|
1405 | int nxpol = cGetXPol ? 2*nChan : 0; |
---|
1406 | mbrec.allocate(0, nChan*nPol, nxpol); |
---|
1407 | } |
---|
1408 | |
---|
1409 | mbrec.nIF = 1; |
---|
1410 | mbrec.IFno[0] = iIF + 1; |
---|
1411 | mbrec.nChan[0] = nChan; |
---|
1412 | mbrec.nPol[0] = nPol; |
---|
1413 | |
---|
1414 | readData(FqRefPix, cRow, mbrec.fqRefPix); |
---|
1415 | readData(FqRefVal, cRow, mbrec.fqRefVal); |
---|
1416 | readData(FqDelt, cRow, mbrec.fqDelt); |
---|
1417 | |
---|
1418 | if (cALFA_BD) { |
---|
1419 | unsigned char invert; |
---|
1420 | int anynul, colnum; |
---|
1421 | findCol("UPPERSB", &colnum); |
---|
1422 | fits_read_col(cSDptr, TBYTE, colnum, cRow, 1, 1, 0, &invert, &anynul, |
---|
1423 | &cStatus); |
---|
1424 | |
---|
1425 | if (invert) { |
---|
1426 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1427 | } |
---|
1428 | } |
---|
1429 | |
---|
1430 | if (cStatus) { |
---|
1431 | logMsg(); |
---|
1432 | return 1; |
---|
1433 | } |
---|
1434 | |
---|
1435 | // Adjust for channel selection. |
---|
1436 | if (mbrec.fqRefPix[0] != refChan) { |
---|
1437 | mbrec.fqRefVal[0] += (refChan - mbrec.fqRefPix[0]) * mbrec.fqDelt[0]; |
---|
1438 | mbrec.fqRefPix[0] = refChan; |
---|
1439 | } |
---|
1440 | |
---|
1441 | if (endChan < startChan) { |
---|
1442 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1443 | } |
---|
1444 | |
---|
1445 | // The data may only have a scalar Tsys value. |
---|
1446 | mbrec.tsys[0][0] = 0.0f; |
---|
1447 | mbrec.tsys[0][1] = 0.0f; |
---|
1448 | if (cData[TSYS].nelem >= nPol) { |
---|
1449 | readData(TSYS, cRow, mbrec.tsys[0]); |
---|
1450 | } |
---|
1451 | |
---|
1452 | for (int j = 0; j < 2; j++) { |
---|
1453 | mbrec.calfctr[0][j] = 0.0f; |
---|
1454 | } |
---|
1455 | if (cData[CALFCTR].colnum > 0) { |
---|
1456 | readData(CALFCTR, cRow, mbrec.calfctr); |
---|
1457 | } |
---|
1458 | |
---|
1459 | if (cHaveBase) { |
---|
1460 | mbrec.haveBase = 1; |
---|
1461 | readData(BASELIN, cRow, mbrec.baseLin); |
---|
1462 | readData(BASESUB, cRow, mbrec.baseSub); |
---|
1463 | } else { |
---|
1464 | mbrec.haveBase = 0; |
---|
1465 | } |
---|
1466 | |
---|
1467 | if (cStatus) { |
---|
1468 | logMsg(); |
---|
1469 | return 1; |
---|
1470 | } |
---|
1471 | |
---|
1472 | // Read data, sectioning and transposing it in the process. |
---|
1473 | long *blc = new long[cNAxis+1]; |
---|
1474 | long *trc = new long[cNAxis+1]; |
---|
1475 | long *inc = new long[cNAxis+1]; |
---|
1476 | for (int iaxis = 0; iaxis <= cNAxis; iaxis++) { |
---|
1477 | blc[iaxis] = 1; |
---|
1478 | trc[iaxis] = 1; |
---|
1479 | inc[iaxis] = 1; |
---|
1480 | } |
---|
1481 | |
---|
1482 | blc[cReqax[0]] = std::min(startChan, endChan); |
---|
1483 | trc[cReqax[0]] = std::max(startChan, endChan); |
---|
1484 | blc[cNAxis] = cRow; |
---|
1485 | trc[cNAxis] = cRow; |
---|
1486 | |
---|
1487 | mbrec.haveSpectra = cGetSpectra; |
---|
1488 | if (cGetSpectra) { |
---|
1489 | int anynul; |
---|
1490 | |
---|
1491 | for (int ipol = 0; ipol < nPol; ipol++) { |
---|
1492 | blc[cReqax[1]] = ipol+1; |
---|
1493 | trc[cReqax[1]] = ipol+1; |
---|
1494 | |
---|
1495 | if (cALFA && cALFA_CIMA < 2) { |
---|
1496 | // ALFA data: polarizations are stored in successive rows. |
---|
1497 | blc[cReqax[1]] = 1; |
---|
1498 | trc[cReqax[1]] = 1; |
---|
1499 | |
---|
1500 | if (ipol) { |
---|
1501 | if (++cRow > cNRow) { |
---|
1502 | return -1; |
---|
1503 | } |
---|
1504 | |
---|
1505 | blc[cNAxis] = cRow; |
---|
1506 | trc[cNAxis] = cRow; |
---|
1507 | } |
---|
1508 | |
---|
1509 | } else if (cData[DATA].nelem < 0) { |
---|
1510 | // Variable dimension array; get axis lengths. |
---|
1511 | int naxis = 5, status; |
---|
1512 | |
---|
1513 | if ((status = readDim(DATA, cRow, &naxis, cNAxes))) { |
---|
1514 | logMsg(); |
---|
1515 | |
---|
1516 | } else if ((status = (naxis != cNAxis))) { |
---|
1517 | logMsg("ERROR: DATA array dimensions changed."); |
---|
1518 | } |
---|
1519 | |
---|
1520 | if (status) { |
---|
1521 | delete [] blc; |
---|
1522 | delete [] trc; |
---|
1523 | delete [] inc; |
---|
1524 | return 1; |
---|
1525 | } |
---|
1526 | } |
---|
1527 | |
---|
1528 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxis, cNAxes, |
---|
1529 | blc, trc, inc, 0, mbrec.spectra[0] + ipol*nChan, &anynul, |
---|
1530 | &cStatus)) { |
---|
1531 | logMsg(); |
---|
1532 | delete [] blc; |
---|
1533 | delete [] trc; |
---|
1534 | delete [] inc; |
---|
1535 | return 1; |
---|
1536 | } |
---|
1537 | |
---|
1538 | if (endChan < startChan) { |
---|
1539 | // Reverse the spectrum. |
---|
1540 | float *iptr = mbrec.spectra[0] + ipol*nChan; |
---|
1541 | float *jptr = iptr + nChan - 1; |
---|
1542 | float *mid = iptr + nChan/2; |
---|
1543 | while (iptr < mid) { |
---|
1544 | float tmp = *iptr; |
---|
1545 | *(iptr++) = *jptr; |
---|
1546 | *(jptr--) = tmp; |
---|
1547 | } |
---|
1548 | } |
---|
1549 | |
---|
1550 | if (cALFA) { |
---|
1551 | // ALFA data, rescale the spectrum. |
---|
1552 | float *chan = mbrec.spectra[0] + ipol*nChan; |
---|
1553 | float *chanN = chan + nChan; |
---|
1554 | while (chan < chanN) { |
---|
1555 | // Approximate conversion to Jy. |
---|
1556 | *(chan++) *= cALFAcal[iBeam][iIF]; |
---|
1557 | } |
---|
1558 | } |
---|
1559 | |
---|
1560 | if (mbrec.tsys[0][ipol] == 0.0) { |
---|
1561 | // Compute Tsys as the average across the spectrum. |
---|
1562 | float *chan = mbrec.spectra[0] + ipol*nChan; |
---|
1563 | float *chanN = chan + nChan; |
---|
1564 | float *tsys = mbrec.tsys[0] + ipol; |
---|
1565 | while (chan < chanN) { |
---|
1566 | *tsys += *(chan++); |
---|
1567 | } |
---|
1568 | |
---|
1569 | *tsys /= nChan; |
---|
1570 | } |
---|
1571 | |
---|
1572 | // Read data flags. |
---|
1573 | if (cData[FLAGGED].colnum > 0) { |
---|
1574 | if (fits_read_subset_byt(cSDptr, cData[FLAGGED].colnum, cNAxis, |
---|
1575 | cNAxes, blc, trc, inc, 0, mbrec.flagged[0] + ipol*nChan, &anynul, |
---|
1576 | &cStatus)) { |
---|
1577 | logMsg(); |
---|
1578 | delete [] blc; |
---|
1579 | delete [] trc; |
---|
1580 | delete [] inc; |
---|
1581 | return 1; |
---|
1582 | } |
---|
1583 | |
---|
1584 | if (endChan < startChan) { |
---|
1585 | // Reverse the flag vector. |
---|
1586 | unsigned char *iptr = mbrec.flagged[0] + ipol*nChan; |
---|
1587 | unsigned char *jptr = iptr + nChan - 1; |
---|
1588 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1589 | unsigned char tmp = *iptr; |
---|
1590 | *(iptr++) = *jptr; |
---|
1591 | *(jptr--) = tmp; |
---|
1592 | } |
---|
1593 | } |
---|
1594 | |
---|
1595 | } else { |
---|
1596 | // All channels are unflagged by default. |
---|
1597 | unsigned char *iptr = mbrec.flagged[0] + ipol*nChan; |
---|
1598 | for (int ichan = 0; ichan < nChan; ichan++) { |
---|
1599 | *(iptr++) = 0; |
---|
1600 | } |
---|
1601 | } |
---|
1602 | } |
---|
1603 | } |
---|
1604 | |
---|
1605 | |
---|
1606 | // Read cross-polarization data. |
---|
1607 | if (cGetXPol) { |
---|
1608 | int anynul; |
---|
1609 | for (int j = 0; j < 2; j++) { |
---|
1610 | mbrec.xcalfctr[0][j] = 0.0f; |
---|
1611 | } |
---|
1612 | if (cData[XCALFCTR].colnum > 0) { |
---|
1613 | readData(XCALFCTR, cRow, mbrec.xcalfctr); |
---|
1614 | } |
---|
1615 | |
---|
1616 | blc[0] = 1; |
---|
1617 | trc[0] = 2; |
---|
1618 | blc[1] = std::min(startChan, endChan); |
---|
1619 | trc[1] = std::max(startChan, endChan); |
---|
1620 | blc[2] = cRow; |
---|
1621 | trc[2] = cRow; |
---|
1622 | |
---|
1623 | int nAxis = 2; |
---|
1624 | long nAxes[] = {2, nChan}; |
---|
1625 | |
---|
1626 | if (fits_read_subset_flt(cSDptr, cData[XPOLDATA].colnum, nAxis, nAxes, |
---|
1627 | blc, trc, inc, 0, mbrec.xpol[0], &anynul, &cStatus)) { |
---|
1628 | logMsg(); |
---|
1629 | delete [] blc; |
---|
1630 | delete [] trc; |
---|
1631 | delete [] inc; |
---|
1632 | return 1; |
---|
1633 | } |
---|
1634 | |
---|
1635 | if (endChan < startChan) { |
---|
1636 | // Invert the cross-polarization spectrum. |
---|
1637 | float *iptr = mbrec.xpol[0]; |
---|
1638 | float *jptr = iptr + nChan - 2; |
---|
1639 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1640 | float tmp = *iptr; |
---|
1641 | *iptr = *jptr; |
---|
1642 | *jptr = tmp; |
---|
1643 | |
---|
1644 | tmp = *(iptr+1); |
---|
1645 | *(iptr+1) = *(jptr+1); |
---|
1646 | *(jptr+1) = tmp; |
---|
1647 | |
---|
1648 | iptr += 2; |
---|
1649 | jptr -= 2; |
---|
1650 | } |
---|
1651 | } |
---|
1652 | } |
---|
1653 | |
---|
1654 | delete [] blc; |
---|
1655 | delete [] trc; |
---|
1656 | delete [] inc; |
---|
1657 | |
---|
1658 | if (cStatus) { |
---|
1659 | logMsg(); |
---|
1660 | return 1; |
---|
1661 | } |
---|
1662 | |
---|
1663 | mbrec.extraSysCal = cExtraSysCal; |
---|
1664 | readData(REFBEAM, cRow, &mbrec.refBeam); |
---|
1665 | readData(TCAL, cRow, &mbrec.tcal[0]); |
---|
1666 | readData(TCALTIME, cRow, mbrec.tcalTime); |
---|
1667 | |
---|
1668 | readData(AZIMUTH, cRow, &mbrec.azimuth); |
---|
1669 | readData(ELEVATIO, cRow, &mbrec.elevation); |
---|
1670 | readData(PARANGLE, cRow, &mbrec.parAngle); |
---|
1671 | |
---|
1672 | readData(FOCUSAXI, cRow, &mbrec.focusAxi); |
---|
1673 | readData(FOCUSTAN, cRow, &mbrec.focusTan); |
---|
1674 | readData(FOCUSROT, cRow, &mbrec.focusRot); |
---|
1675 | |
---|
1676 | readData(TAMBIENT, cRow, &mbrec.temp); |
---|
1677 | readData(PRESSURE, cRow, &mbrec.pressure); |
---|
1678 | readData(HUMIDITY, cRow, &mbrec.humidity); |
---|
1679 | readData(WINDSPEE, cRow, &mbrec.windSpeed); |
---|
1680 | readData(WINDDIRE, cRow, &mbrec.windAz); |
---|
1681 | |
---|
1682 | if (cALFA_BD) { |
---|
1683 | // ALFA BDFITS stores zenith angle rather than elevation. |
---|
1684 | mbrec.elevation = 90.0 - mbrec.elevation; |
---|
1685 | } |
---|
1686 | |
---|
1687 | mbrec.azimuth *= D2R; |
---|
1688 | mbrec.elevation *= D2R; |
---|
1689 | mbrec.parAngle *= D2R; |
---|
1690 | mbrec.focusRot *= D2R; |
---|
1691 | mbrec.windAz *= D2R; |
---|
1692 | |
---|
1693 | if (cStatus) { |
---|
1694 | logMsg(); |
---|
1695 | return 1; |
---|
1696 | } |
---|
1697 | |
---|
1698 | return 0; |
---|
1699 | } |
---|
1700 | |
---|
1701 | //-------------------------------------------------------- SDFITSreader::close |
---|
1702 | |
---|
1703 | // Close the SDFITS file. |
---|
1704 | |
---|
1705 | void SDFITSreader::close() |
---|
1706 | { |
---|
1707 | if (cSDptr) { |
---|
1708 | int status = 0; |
---|
1709 | fits_close_file(cSDptr, &status); |
---|
1710 | cSDptr = 0; |
---|
1711 | |
---|
1712 | if (cBeams) delete [] cBeams; |
---|
1713 | if (cIFs) delete [] cIFs; |
---|
1714 | if (cStartChan) delete [] cStartChan; |
---|
1715 | if (cEndChan) delete [] cEndChan; |
---|
1716 | if (cRefChan) delete [] cRefChan; |
---|
1717 | } |
---|
1718 | } |
---|
1719 | |
---|
1720 | //------------------------------------------------------- SDFITSreader::logMsg |
---|
1721 | |
---|
1722 | // Log a message. If the current CFITSIO status value is non-zero, also log |
---|
1723 | // the corresponding error message and the CFITSIO message stack. |
---|
1724 | |
---|
1725 | void SDFITSreader::logMsg(const char *msg) |
---|
1726 | { |
---|
1727 | FITSreader::logMsg(msg); |
---|
1728 | |
---|
1729 | if (cStatus > 0) { |
---|
1730 | fits_get_errstatus(cStatus, cMsg); |
---|
1731 | FITSreader::logMsg(cMsg); |
---|
1732 | |
---|
1733 | while (fits_read_errmsg(cMsg)) { |
---|
1734 | FITSreader::logMsg(cMsg); |
---|
1735 | } |
---|
1736 | } |
---|
1737 | } |
---|
1738 | |
---|
1739 | //----------------------------------------------------- SDFITSreader::findData |
---|
1740 | |
---|
1741 | // Locate a data item in the SDFITS file. |
---|
1742 | |
---|
1743 | void SDFITSreader::findData( |
---|
1744 | int iData, |
---|
1745 | char *name, |
---|
1746 | int type) |
---|
1747 | { |
---|
1748 | cData[iData].name = name; |
---|
1749 | cData[iData].type = type; |
---|
1750 | |
---|
1751 | int colnum; |
---|
1752 | findCol(name, &colnum); |
---|
1753 | cData[iData].colnum = colnum; |
---|
1754 | |
---|
1755 | // Determine the number of data elements. |
---|
1756 | if (colnum > 0) { |
---|
1757 | int coltype; |
---|
1758 | long nelem, width; |
---|
1759 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
1760 | fits_get_bcolparms(cSDptr, colnum, 0x0, cData[iData].units, 0x0, 0x0, 0x0, |
---|
1761 | 0x0, 0x0, 0x0, &cStatus); |
---|
1762 | |
---|
1763 | // Look for a TDIMnnn keyword or column. |
---|
1764 | char tdim[8]; |
---|
1765 | sprintf(tdim, "TDIM%d", colnum); |
---|
1766 | findCol(tdim, &cData[iData].tdimcol); |
---|
1767 | |
---|
1768 | if (coltype < 0) { |
---|
1769 | // CFITSIO returns coltype < 0 for variable length arrays. |
---|
1770 | cData[iData].coltype = -coltype; |
---|
1771 | cData[iData].nelem = -nelem; |
---|
1772 | |
---|
1773 | } else { |
---|
1774 | cData[iData].coltype = coltype; |
---|
1775 | |
---|
1776 | // Is there a TDIMnnn column? |
---|
1777 | if (cData[iData].tdimcol > 0) { |
---|
1778 | // Yes, dimensions of the fixed-length array could still vary. |
---|
1779 | cData[iData].nelem = -nelem; |
---|
1780 | } else { |
---|
1781 | cData[iData].nelem = nelem; |
---|
1782 | } |
---|
1783 | } |
---|
1784 | |
---|
1785 | } else if (colnum == 0) { |
---|
1786 | // Keyword. |
---|
1787 | cData[iData].coltype = 0; |
---|
1788 | cData[iData].nelem = 1; |
---|
1789 | cData[iData].tdimcol = -1; |
---|
1790 | } |
---|
1791 | } |
---|
1792 | |
---|
1793 | //------------------------------------------------------ SDFITSreader::readDim |
---|
1794 | |
---|
1795 | // Determine the dimensions of an array in the SDFITS file. |
---|
1796 | |
---|
1797 | int SDFITSreader::readDim( |
---|
1798 | int iData, |
---|
1799 | long iRow, |
---|
1800 | int *naxis, |
---|
1801 | long naxes[]) |
---|
1802 | { |
---|
1803 | int colnum = cData[iData].colnum; |
---|
1804 | if (colnum <= 0) { |
---|
1805 | return 1; |
---|
1806 | } |
---|
1807 | |
---|
1808 | int maxdim = *naxis; |
---|
1809 | if (cData[iData].tdimcol < 0) { |
---|
1810 | // No TDIMnnn column for this array. |
---|
1811 | if (cData[iData].nelem < 0) { |
---|
1812 | // Variable length array; read the array descriptor. |
---|
1813 | *naxis = 1; |
---|
1814 | long dummy; |
---|
1815 | if (fits_read_descript(cSDptr, colnum, iRow, naxes, &dummy, &cStatus)) { |
---|
1816 | return 1; |
---|
1817 | } |
---|
1818 | |
---|
1819 | } else { |
---|
1820 | // Read the repeat count from TFORMnnn. |
---|
1821 | if (fits_read_tdim(cSDptr, colnum, maxdim, naxis, naxes, &cStatus)) { |
---|
1822 | return 1; |
---|
1823 | } |
---|
1824 | } |
---|
1825 | |
---|
1826 | } else { |
---|
1827 | // Read the TDIMnnn value from the header or table. |
---|
1828 | char tdim[8], tdimval[64]; |
---|
1829 | sprintf(tdim, "TDIM%d", colnum); |
---|
1830 | readData(tdim, TSTRING, iRow, tdimval); |
---|
1831 | |
---|
1832 | // fits_decode_tdim() checks that the TDIMnnn value is within the length |
---|
1833 | // of the array in the specified column number but unfortunately doesn't |
---|
1834 | // recognize variable-length arrays. Hence we must decode it here. |
---|
1835 | char *tp = tdimval; |
---|
1836 | if (*tp != '(') return 1; |
---|
1837 | |
---|
1838 | tp++; |
---|
1839 | *naxis = 0; |
---|
1840 | for (size_t j = 1; j < strlen(tdimval); j++) { |
---|
1841 | if (tdimval[j] == ',' || tdimval[j] == ')') { |
---|
1842 | sscanf(tp, "%ld", naxes + (*naxis)++); |
---|
1843 | if (tdimval[j] == ')') break; |
---|
1844 | tp = tdimval + j + 1; |
---|
1845 | } |
---|
1846 | } |
---|
1847 | } |
---|
1848 | |
---|
1849 | return 0; |
---|
1850 | } |
---|
1851 | |
---|
1852 | //----------------------------------------------------- SDFITSreader::readParm |
---|
1853 | |
---|
1854 | // Read a parameter value from the SDFITS file. |
---|
1855 | |
---|
1856 | int SDFITSreader::readParm( |
---|
1857 | char *name, |
---|
1858 | int type, |
---|
1859 | void *value) |
---|
1860 | { |
---|
1861 | return readData(name, type, 1, value); |
---|
1862 | } |
---|
1863 | |
---|
1864 | //----------------------------------------------------- SDFITSreader::readData |
---|
1865 | |
---|
1866 | // Read a data value from the SDFITS file. |
---|
1867 | |
---|
1868 | int SDFITSreader::readData( |
---|
1869 | char *name, |
---|
1870 | int type, |
---|
1871 | long iRow, |
---|
1872 | void *value) |
---|
1873 | { |
---|
1874 | int colnum; |
---|
1875 | findCol(name, &colnum); |
---|
1876 | |
---|
1877 | if (colnum > 0) { |
---|
1878 | // Read the first value from the specified row of the table. |
---|
1879 | int coltype; |
---|
1880 | long nelem, width; |
---|
1881 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
1882 | |
---|
1883 | int anynul; |
---|
1884 | if (type == TSTRING) { |
---|
1885 | if (nelem) { |
---|
1886 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
1887 | &cStatus); |
---|
1888 | } else { |
---|
1889 | strcpy((char *)value, ""); |
---|
1890 | } |
---|
1891 | |
---|
1892 | } else { |
---|
1893 | if (nelem) { |
---|
1894 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, value, &anynul, |
---|
1895 | &cStatus); |
---|
1896 | } else { |
---|
1897 | if (type == TSHORT) { |
---|
1898 | *((short *)value) = 0; |
---|
1899 | } else if (type == TINT) { |
---|
1900 | *((int *)value) = 0; |
---|
1901 | } else if (type == TFLOAT) { |
---|
1902 | *((float *)value) = 0.0f; |
---|
1903 | } else if (type == TDOUBLE) { |
---|
1904 | *((double *)value) = 0.0; |
---|
1905 | } |
---|
1906 | } |
---|
1907 | } |
---|
1908 | |
---|
1909 | } else if (colnum == 0) { |
---|
1910 | // Read keyword value. |
---|
1911 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
1912 | |
---|
1913 | } else { |
---|
1914 | // Not present. |
---|
1915 | if (type == TSTRING) { |
---|
1916 | strcpy((char *)value, ""); |
---|
1917 | } else if (type == TSHORT) { |
---|
1918 | *((short *)value) = 0; |
---|
1919 | } else if (type == TINT) { |
---|
1920 | *((int *)value) = 0; |
---|
1921 | } else if (type == TFLOAT) { |
---|
1922 | *((float *)value) = 0.0f; |
---|
1923 | } else if (type == TDOUBLE) { |
---|
1924 | *((double *)value) = 0.0; |
---|
1925 | } |
---|
1926 | } |
---|
1927 | |
---|
1928 | return colnum < 0; |
---|
1929 | } |
---|
1930 | |
---|
1931 | //----------------------------------------------------- SDFITSreader::readData |
---|
1932 | |
---|
1933 | // Read data from the SDFITS file. |
---|
1934 | |
---|
1935 | int SDFITSreader::readData( |
---|
1936 | int iData, |
---|
1937 | long iRow, |
---|
1938 | void *value) |
---|
1939 | { |
---|
1940 | char *name = cData[iData].name; |
---|
1941 | int type = cData[iData].type; |
---|
1942 | int colnum = cData[iData].colnum; |
---|
1943 | long nelem = cData[iData].nelem; |
---|
1944 | |
---|
1945 | if (colnum > 0) { |
---|
1946 | // Read the required number of values from the specified row of the table. |
---|
1947 | int anynul; |
---|
1948 | if (type == TSTRING) { |
---|
1949 | if (nelem) { |
---|
1950 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
1951 | &cStatus); |
---|
1952 | } else { |
---|
1953 | strcpy((char *)value, ""); |
---|
1954 | } |
---|
1955 | |
---|
1956 | } else { |
---|
1957 | if (nelem) { |
---|
1958 | fits_read_col(cSDptr, type, colnum, iRow, 1, abs(nelem), 0, value, |
---|
1959 | &anynul, &cStatus); |
---|
1960 | } else { |
---|
1961 | if (type == TSHORT) { |
---|
1962 | *((short *)value) = 0; |
---|
1963 | } else if (type == TINT) { |
---|
1964 | *((int *)value) = 0; |
---|
1965 | } else if (type == TFLOAT) { |
---|
1966 | *((float *)value) = 0.0f; |
---|
1967 | } else if (type == TDOUBLE) { |
---|
1968 | *((double *)value) = 0.0; |
---|
1969 | } |
---|
1970 | } |
---|
1971 | } |
---|
1972 | |
---|
1973 | } else if (colnum == 0) { |
---|
1974 | // Read keyword value. |
---|
1975 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
1976 | |
---|
1977 | } else { |
---|
1978 | // Not present. |
---|
1979 | if (type == TSTRING) { |
---|
1980 | strcpy((char *)value, ""); |
---|
1981 | } else if (type == TSHORT) { |
---|
1982 | *((short *)value) = 0; |
---|
1983 | } else if (type == TINT) { |
---|
1984 | *((int *)value) = 0; |
---|
1985 | } else if (type == TFLOAT) { |
---|
1986 | *((float *)value) = 0.0f; |
---|
1987 | } else if (type == TDOUBLE) { |
---|
1988 | *((double *)value) = 0.0; |
---|
1989 | } |
---|
1990 | } |
---|
1991 | |
---|
1992 | return colnum < 0; |
---|
1993 | } |
---|
1994 | |
---|
1995 | //------------------------------------------------------ SDFITSreader::findCol |
---|
1996 | |
---|
1997 | // Locate a parameter in the SDFITS file. |
---|
1998 | |
---|
1999 | void SDFITSreader::findCol( |
---|
2000 | char *name, |
---|
2001 | int *colnum) |
---|
2002 | { |
---|
2003 | *colnum = 0; |
---|
2004 | int status = 0; |
---|
2005 | fits_get_colnum(cSDptr, CASESEN, name, colnum, &status); |
---|
2006 | |
---|
2007 | if (status) { |
---|
2008 | // Not a real column - maybe it's virtual. |
---|
2009 | char card[81]; |
---|
2010 | |
---|
2011 | status = 0; |
---|
2012 | fits_read_card(cSDptr, name, card, &status); |
---|
2013 | if (status) { |
---|
2014 | // Not virtual either. |
---|
2015 | *colnum = -1; |
---|
2016 | } |
---|
2017 | |
---|
2018 | // Clear error messages. |
---|
2019 | fits_clear_errmsg(); |
---|
2020 | } |
---|
2021 | } |
---|
2022 | |
---|
2023 | //------------------------------------------------------ SDFITSreader::alfaCal |
---|
2024 | |
---|
2025 | // Process ALFA calibration data. |
---|
2026 | |
---|
2027 | int SDFITSreader::alfaCal( |
---|
2028 | short iBeam, |
---|
2029 | short iIF, |
---|
2030 | short iPol) |
---|
2031 | { |
---|
2032 | int calOn; |
---|
2033 | char chars[32]; |
---|
2034 | if (cALFA_BD) { |
---|
2035 | readData("OBS_NAME", TSTRING, cRow, chars); |
---|
2036 | } else { |
---|
2037 | readData("SCANTYPE", TSTRING, cRow, chars); |
---|
2038 | } |
---|
2039 | |
---|
2040 | if (strcmp(chars, "ON") == 0) { |
---|
2041 | calOn = 1; |
---|
2042 | } else if (strcmp(chars, "OFF") == 0) { |
---|
2043 | calOn = 0; |
---|
2044 | } else { |
---|
2045 | return 1; |
---|
2046 | } |
---|
2047 | |
---|
2048 | // Read cal data. |
---|
2049 | long *blc = new long[cNAxis+1]; |
---|
2050 | long *trc = new long[cNAxis+1]; |
---|
2051 | long *inc = new long[cNAxis+1]; |
---|
2052 | for (int iaxis = 0; iaxis <= cNAxis; iaxis++) { |
---|
2053 | blc[iaxis] = 1; |
---|
2054 | trc[iaxis] = 1; |
---|
2055 | inc[iaxis] = 1; |
---|
2056 | } |
---|
2057 | |
---|
2058 | // User channel selection. |
---|
2059 | int startChan = cStartChan[iIF]; |
---|
2060 | int endChan = cEndChan[iIF]; |
---|
2061 | |
---|
2062 | blc[cNAxis] = cRow; |
---|
2063 | trc[cNAxis] = cRow; |
---|
2064 | blc[cReqax[0]] = std::min(startChan, endChan); |
---|
2065 | trc[cReqax[0]] = std::max(startChan, endChan); |
---|
2066 | if (cALFA_CIMA > 1) { |
---|
2067 | // CIMAFITS 2.x has a legitimate STOKES axis... |
---|
2068 | blc[cReqax[1]] = iPol+1; |
---|
2069 | trc[cReqax[1]] = iPol+1; |
---|
2070 | } else { |
---|
2071 | // ...older ALFA data does not. |
---|
2072 | blc[cReqax[1]] = 1; |
---|
2073 | trc[cReqax[1]] = 1; |
---|
2074 | } |
---|
2075 | |
---|
2076 | float spectrum[endChan]; |
---|
2077 | int anynul; |
---|
2078 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxis, cNAxes, |
---|
2079 | blc, trc, inc, 0, spectrum, &anynul, &cStatus)) { |
---|
2080 | logMsg(); |
---|
2081 | delete [] blc; |
---|
2082 | delete [] trc; |
---|
2083 | delete [] inc; |
---|
2084 | return 1; |
---|
2085 | } |
---|
2086 | |
---|
2087 | // Average the spectrum. |
---|
2088 | float mean = 1e9f; |
---|
2089 | for (int k = 0; k < 2; k++) { |
---|
2090 | float discrim = 2.0f * mean; |
---|
2091 | |
---|
2092 | int nChan = 0; |
---|
2093 | float sum = 0.0f; |
---|
2094 | |
---|
2095 | float *chanN = spectrum + abs(endChan - startChan) + 1; |
---|
2096 | for (float *chan = spectrum; chan < chanN; chan++) { |
---|
2097 | // Simple discriminant that eliminates strong radar interference. |
---|
2098 | if (*chan < discrim) { |
---|
2099 | nChan++; |
---|
2100 | sum += *chan; |
---|
2101 | } |
---|
2102 | } |
---|
2103 | |
---|
2104 | mean = sum / nChan; |
---|
2105 | } |
---|
2106 | |
---|
2107 | if (calOn) { |
---|
2108 | cALFAcalOn[iBeam][iPol] += mean; |
---|
2109 | } else { |
---|
2110 | cALFAcalOff[iBeam][iPol] += mean; |
---|
2111 | } |
---|
2112 | |
---|
2113 | if (cALFAcalOn[iBeam][iPol] != 0.0f && |
---|
2114 | cALFAcalOff[iBeam][iPol] != 0.0f) { |
---|
2115 | // Tcal should come from the TCAL table, it varies weakly with beam, |
---|
2116 | // polarization, and frequency. However, TCAL is not written properly. |
---|
2117 | float Tcal = 12.0f; |
---|
2118 | cALFAcal[iBeam][iPol] = Tcal / (cALFAcalOn[iBeam][iPol] - |
---|
2119 | cALFAcalOff[iBeam][iPol]); |
---|
2120 | |
---|
2121 | // Scale from K to Jy; the gain also varies weakly with beam, |
---|
2122 | // polarization, frequency, and zenith angle. |
---|
2123 | float fluxCal = 10.0f; |
---|
2124 | cALFAcal[iBeam][iPol] /= fluxCal; |
---|
2125 | |
---|
2126 | cALFAcalOn[iBeam][iPol] = 0.0f; |
---|
2127 | cALFAcalOff[iBeam][iPol] = 0.0f; |
---|
2128 | } |
---|
2129 | |
---|
2130 | return 0; |
---|
2131 | } |
---|