1 | //#--------------------------------------------------------------------------- |
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2 | //# SDFITSreader.cc: ATNF interface class for SDFITS input using CFITSIO. |
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3 | //#--------------------------------------------------------------------------- |
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4 | //# livedata - processing pipeline for single-dish, multibeam spectral data. |
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5 | //# Copyright (C) 2000-2009, Australia Telescope National Facility, CSIRO |
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6 | //# |
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7 | //# This file is part of livedata. |
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8 | //# |
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9 | //# livedata is free software: you can redistribute it and/or modify it under |
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10 | //# the terms of the GNU General Public License as published by the Free |
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11 | //# Software Foundation, either version 3 of the License, or (at your option) |
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12 | //# any later version. |
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13 | //# |
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14 | //# livedata is distributed in the hope that it will be useful, but WITHOUT |
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15 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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16 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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17 | //# more details. |
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18 | //# |
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19 | //# You should have received a copy of the GNU General Public License along |
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20 | //# with livedata. If not, see <http://www.gnu.org/licenses/>. |
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21 | //# |
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22 | //# Correspondence concerning livedata may be directed to: |
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23 | //# Internet email: mcalabre@atnf.csiro.au |
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24 | //# Postal address: Dr. Mark Calabretta |
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25 | //# Australia Telescope National Facility, CSIRO |
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26 | //# PO Box 76 |
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27 | //# Epping NSW 1710 |
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28 | //# AUSTRALIA |
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29 | //# |
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30 | //# http://www.atnf.csiro.au/computing/software/livedata.html |
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31 | //# $Id: SDFITSreader.cc,v 19.45 2009-09-30 07:23:48 cal103 Exp $ |
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32 | //#--------------------------------------------------------------------------- |
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33 | //# The SDFITSreader class reads single dish FITS files such as those written |
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34 | //# by SDFITSwriter containing Parkes Multibeam data. |
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35 | //# |
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36 | //# Original: 2000/08/09, Mark Calabretta, ATNF |
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37 | //#--------------------------------------------------------------------------- |
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38 | |
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39 | #include <atnf/pks/pks_maths.h> |
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40 | #include <atnf/PKSIO/MBrecord.h> |
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41 | #include <atnf/PKSIO/SDFITSreader.h> |
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42 | |
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43 | #include <casa/Logging/LogIO.h> |
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44 | #include <casa/Quanta/MVTime.h> |
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45 | #include <casa/math.h> |
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46 | #include <casa/stdio.h> |
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47 | |
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48 | #include <algorithm> |
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49 | #include <strings.h> |
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50 | #include <cstring> |
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51 | |
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52 | class FITSparm |
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53 | { |
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54 | public: |
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55 | char *name; // Keyword or column name. |
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56 | int type; // Expected keyvalue or column data type. |
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57 | int colnum; // Column number; 0 for keyword; -1 absent. |
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58 | int coltype; // Column data type, as found. |
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59 | long nelem; // Column data repeat count; < 0 for vardim. |
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60 | int tdimcol; // TDIM column number; 0 for keyword; -1 absent. |
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61 | char units[32]; // Units from TUNITn keyword. |
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62 | }; |
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63 | |
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64 | // Numerical constants. |
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65 | const double PI = 3.141592653589793238462643; |
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66 | |
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67 | // Factor to convert radians to degrees. |
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68 | const double D2R = PI / 180.0; |
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69 | |
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70 | // Class name |
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71 | const string className = "SDFITSreader" ; |
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72 | |
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73 | //---------------------------------------------------- SDFITSreader::(statics) |
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74 | |
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75 | int SDFITSreader::sInit = 1; |
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76 | int SDFITSreader::sReset = 0; |
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77 | int (*SDFITSreader::sALFAcalNon)[2] = (int (*)[2])(new float[16]); |
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78 | int (*SDFITSreader::sALFAcalNoff)[2] = (int (*)[2])(new float[16]); |
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79 | float (*SDFITSreader::sALFAcalOn)[2] = (float (*)[2])(new float[16]); |
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80 | float (*SDFITSreader::sALFAcalOff)[2] = (float (*)[2])(new float[16]); |
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81 | float (*SDFITSreader::sALFAcal)[2] = (float (*)[2])(new float[16]); |
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82 | |
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83 | //------------------------------------------------- SDFITSreader::SDFITSreader |
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84 | |
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85 | SDFITSreader::SDFITSreader() |
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86 | { |
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87 | // Default constructor. |
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88 | cSDptr = 0x0; |
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89 | |
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90 | // Allocate space for data descriptors. |
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91 | cData = new FITSparm[NDATA]; |
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92 | |
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93 | for (int iData = 0; iData < NDATA; iData++) { |
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94 | cData[iData].colnum = -1; |
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95 | } |
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96 | |
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97 | // Initialize pointers. |
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98 | cBeams = 0x0; |
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99 | cIFs = 0x0; |
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100 | cStartChan = 0x0; |
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101 | cEndChan = 0x0; |
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102 | cRefChan = 0x0; |
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103 | cPols = 0x0; |
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104 | } |
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105 | |
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106 | //------------------------------------------------ SDFITSreader::~SDFITSreader |
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107 | |
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108 | SDFITSreader::~SDFITSreader() |
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109 | { |
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110 | close(); |
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111 | |
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112 | delete [] cData; |
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113 | } |
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114 | |
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115 | //--------------------------------------------------------- SDFITSreader::open |
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116 | |
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117 | // Open an SDFITS file for reading. |
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118 | |
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119 | int SDFITSreader::open( |
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120 | char* sdName, |
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121 | int &nBeam, |
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122 | int* &beams, |
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123 | int &nIF, |
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124 | int* &IFs, |
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125 | int* &nChan, |
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126 | int* &nPol, |
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127 | int* &haveXPol, |
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128 | int &haveBase, |
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129 | int &haveSpectra, |
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130 | int &extraSysCal) |
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131 | { |
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132 | const string methodName = "open()" ; |
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133 | |
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134 | if (cSDptr) { |
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135 | close(); |
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136 | } |
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137 | |
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138 | // Open the SDFITS file. |
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139 | cStatus = 0; |
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140 | if (fits_open_file(&cSDptr, sdName, READONLY, &cStatus)) { |
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141 | sprintf(cMsg, "ERROR: Failed to open SDFITS file\n %s", sdName); |
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142 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, cMsg); |
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143 | return 1; |
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144 | } |
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145 | |
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146 | // Move to the SDFITS extension. |
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147 | cALFA = cALFA_BD = cALFA_CIMA = 0; |
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148 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"SINGLE DISH", 0, &cStatus)) { |
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149 | // No SDFITS table, look for BDFITS or CIMAFITS. |
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150 | cStatus = 0; |
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151 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"BDFITS", 0, &cStatus) == 0) { |
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152 | cALFA_BD = 1; |
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153 | |
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154 | } else { |
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155 | cStatus = 0; |
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156 | if (fits_movnam_hdu(cSDptr, BINARY_TBL, (char *)"CIMAFITS", 0, &cStatus) == 0) { |
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157 | cALFA_CIMA = 1; |
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158 | |
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159 | // Check for later versions of CIMAFITS. |
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160 | float version; |
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161 | readParm((char *)"VERSION", TFLOAT, &version); |
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162 | if (version >= 2.0f) cALFA_CIMA = int(version); |
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163 | |
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164 | } else { |
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165 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Failed to locate SDFITS binary table."); |
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166 | close(); |
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167 | return 1; |
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168 | } |
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169 | } |
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170 | |
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171 | // Arecibo ALFA data of some kind. |
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172 | cALFA = 1; |
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173 | if (sInit) { |
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174 | for (int iBeam = 0; iBeam < 8; iBeam++) { |
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175 | for (int iPol = 0; iPol < 2; iPol++) { |
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176 | sALFAcalOn[iBeam][iPol] = 0.0f; |
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177 | sALFAcalOff[iBeam][iPol] = 0.0f; |
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178 | |
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179 | // Nominal factor to calibrate spectra in Jy. |
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180 | sALFAcal[iBeam][iPol] = 3.0f; |
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181 | } |
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182 | } |
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183 | |
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184 | sInit = 0; |
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185 | } |
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186 | } |
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187 | |
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188 | // GBT data. |
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189 | char telescope[32]; |
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190 | readParm((char *)"TELESCOP", TSTRING, telescope); // Core. |
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191 | cGBT = strncmp(telescope, "GBT", 3) == 0 || |
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192 | strncmp(telescope, (char *)"NRAO_GBT", 8) == 0; |
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193 | |
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194 | |
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195 | // Check that the DATA array column is present. |
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196 | findData(DATA, (char *)"DATA", TFLOAT); |
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197 | haveSpectra = cHaveSpectra = cData[DATA].colnum > 0; |
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198 | |
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199 | cNAxisTime = 0; |
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200 | if (cHaveSpectra) { |
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201 | // Find the number of data axes (must be the same for each IF). |
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202 | cNAxes = 5; |
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203 | if (readDim(DATA, 1, &cNAxes, cNAxis)) { |
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204 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
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205 | close(); |
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206 | return 1; |
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207 | } |
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208 | |
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209 | if (cALFA_BD) { |
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210 | // ALFA BDFITS: variable length arrays don't actually vary and there is |
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211 | // no TDIM (or MAXISn) card; use the LAGS_IN value. |
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212 | cNAxes = 5; |
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213 | readParm((char *)"LAGS_IN", TLONG, cNAxis); |
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214 | cNAxis[1] = 1; |
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215 | cNAxis[2] = 1; |
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216 | cNAxis[3] = 1; |
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217 | cNAxis[4] = 1; |
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218 | cData[DATA].nelem = cNAxis[0]; |
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219 | } |
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220 | |
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221 | if (cNAxes < 4) { |
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222 | // Need at least four axes (for now). |
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223 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array contains fewer than four axes."); |
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224 | close(); |
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225 | return 1; |
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226 | } else if (cNAxes > 5) { |
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227 | // We support up to five axes. |
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228 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array contains more than five axes."); |
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229 | close(); |
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230 | return 1; |
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231 | } |
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232 | |
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233 | findData(FLAGGED, (char *)"FLAGGED", TBYTE); |
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234 | |
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235 | } else { |
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236 | // DATA column not present, check for a DATAXED keyword. |
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237 | findData(DATAXED, (char *)"DATAXED", TSTRING); |
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238 | if (cData[DATAXED].colnum < 0) { |
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239 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array column absent from binary table."); |
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240 | close(); |
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241 | return 1; |
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242 | } |
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243 | |
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244 | // Determine the number of axes and their length. |
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245 | char dataxed[32]; |
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246 | readParm((char *)"DATAXED", TSTRING, dataxed); |
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247 | |
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248 | for (int iaxis = 0; iaxis < 5; iaxis++) cNAxis[iaxis] = 0; |
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249 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxis, cNAxis+1, cNAxis+2, |
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250 | cNAxis+3, cNAxis+4); |
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251 | for (int iaxis = 4; iaxis > -1; iaxis--) { |
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252 | if (cNAxis[iaxis] == 0) cNAxes = iaxis; |
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253 | } |
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254 | } |
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255 | |
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256 | char *CTYPE[5] = {(char *)"CTYPE1", (char *)"CTYPE2", (char *)"CTYPE3", (char *)"CTYPE4", (char *)"CTYPE5"}; |
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257 | char *CRPIX[5] = {(char *)"CRPIX1", (char *)"CRPIX2", (char *)"CRPIX3", (char *)"CRPIX4", (char *)"CRPIX5"}; |
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258 | char *CRVAL[5] = {(char *)"CRVAL1", (char *)"CRVAL2", (char *)"CRVAL3", (char *)"CRVAL4", (char *)"CRVAL5"}; |
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259 | char *CDELT[5] = {(char *)"CDELT1", (char *)"CDELT2", (char *)"CDELT3", (char *)"CDELT4", (char *)"CDELT5"}; |
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260 | |
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261 | // Find required DATA array axes. |
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262 | char ctype[5][72]; |
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263 | for (int iaxis = 0; iaxis < cNAxes; iaxis++) { |
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264 | strcpy(ctype[iaxis], ""); |
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265 | readParm(CTYPE[iaxis], TSTRING, ctype[iaxis]); // Core. |
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266 | } |
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267 | |
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268 | if (cStatus) { |
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269 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
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270 | close(); |
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271 | return 1; |
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272 | } |
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273 | |
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274 | char *fqCRVAL = 0; |
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275 | char *fqCDELT = 0; |
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276 | char *fqCRPIX = 0; |
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277 | char *raCRVAL = 0; |
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278 | char *decCRVAL = 0; |
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279 | char *timeCRVAL = 0; |
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280 | char *timeCDELT = 0; |
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281 | char *timeCRPIX = 0; |
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282 | char *beamCRVAL = 0; |
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283 | char *polCRVAL = 0; |
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284 | |
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285 | cFreqAxis = -1; |
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286 | cStokesAxis = -1; |
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287 | cRaAxis = -1; |
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288 | cDecAxis = -1; |
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289 | cTimeAxis = -1; |
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290 | cBeamAxis = -1; |
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291 | |
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292 | for (int iaxis = 0; iaxis < cNAxes; iaxis++) { |
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293 | if (strncmp(ctype[iaxis], "FREQ", 4) == 0) { |
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294 | cFreqAxis = iaxis; |
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295 | fqCRVAL = CRVAL[iaxis]; |
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296 | fqCDELT = CDELT[iaxis]; |
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297 | fqCRPIX = CRPIX[iaxis]; |
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298 | |
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299 | } else if (strncmp(ctype[iaxis], "STOKES", 6) == 0) { |
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300 | cStokesAxis = iaxis; |
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301 | polCRVAL = CRVAL[iaxis]; |
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302 | |
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303 | } else if (strncmp(ctype[iaxis], "RA", 2) == 0) { |
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304 | cRaAxis = iaxis; |
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305 | raCRVAL = CRVAL[iaxis]; |
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306 | |
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307 | } else if (strncmp(ctype[iaxis], "DEC", 3) == 0) { |
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308 | cDecAxis = iaxis; |
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309 | decCRVAL = CRVAL[iaxis]; |
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310 | |
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311 | } else if (strcmp(ctype[iaxis], "TIME") == 0) { |
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312 | // TIME (UTC seconds since midnight); axis type, if present, takes |
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313 | // precedence over keyword. |
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314 | cTimeAxis = iaxis; |
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315 | timeCRVAL = CRVAL[iaxis]; |
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316 | |
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317 | // Check for non-degeneracy. |
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318 | if ((cNAxisTime = cNAxis[iaxis]) > 1) { |
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319 | timeCDELT = CDELT[iaxis]; |
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320 | timeCRPIX = CRPIX[iaxis]; |
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321 | sprintf(cMsg, "DATA array contains a TIME axis of length %ld.", |
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322 | cNAxisTime); |
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323 | //logMsg(cMsg); |
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324 | log(LogOrigin( className, methodName, WHERE ), LogIO::NORMAL, cMsg); |
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325 | } |
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326 | |
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327 | } else if (strcmp(ctype[iaxis], "BEAM") == 0) { |
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328 | // BEAM can be a keyword or axis type. |
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329 | cBeamAxis = iaxis; |
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330 | beamCRVAL = CRVAL[iaxis]; |
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331 | } |
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332 | } |
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333 | |
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334 | if (cALFA_BD) { |
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335 | // Fixed in ALFA CIMAFITS. |
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336 | cRaAxis = 2; |
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337 | raCRVAL = (char *)"CRVAL2A"; |
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338 | |
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339 | cDecAxis = 3; |
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340 | decCRVAL = (char *)"CRVAL3A"; |
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341 | } |
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342 | |
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343 | |
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344 | // Check that required axes are present. |
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345 | if (cFreqAxis < 0 || cStokesAxis < 0 || cRaAxis < 0 || cDecAxis < 0) { |
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346 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Could not find required DATA array axes."); |
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347 | close(); |
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348 | return 1; |
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349 | } |
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350 | |
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351 | // Set up machinery for data retrieval. |
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352 | findData(SCAN, (char *)"SCAN", TINT); // Shared. |
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353 | findData(CYCLE, (char *)"CYCLE", TINT); // Additional. |
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354 | findData(DATE_OBS, (char *)"DATE-OBS", TSTRING); // Core. |
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355 | |
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356 | if (cTimeAxis >= 0) { |
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357 | // The DATA array has a TIME axis. |
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358 | if (cNAxisTime > 1) { |
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359 | // Non-degenerate. |
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360 | findData(TimeRefVal, timeCRVAL, TDOUBLE); // Time reference value. |
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361 | findData(TimeDelt, timeCDELT, TDOUBLE); // Time increment. |
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362 | findData(TimeRefPix, timeCRPIX, TFLOAT); // Time reference pixel. |
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363 | } else { |
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364 | // Degenerate, treat its like a simple TIME keyword. |
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365 | findData(TIME, timeCRVAL, TDOUBLE); |
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366 | } |
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367 | |
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368 | } else { |
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369 | findData(TIME, (char *)"TIME", TDOUBLE); // Core. |
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370 | } |
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371 | |
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372 | findData(EXPOSURE, (char *)"EXPOSURE", TFLOAT); // Core. |
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373 | findData(OBJECT, (char *)"OBJECT", TSTRING); // Core. |
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374 | findData(OBJ_RA, (char *)"OBJ-RA", TDOUBLE); // Additional. |
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375 | findData(OBJ_DEC, (char *)"OBJ-DEC", TDOUBLE); // Additional. |
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376 | findData(RESTFRQ, (char *)"RESTFRQ", TDOUBLE); // Additional. |
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377 | findData(OBSMODE, (char *)"OBSMODE", TSTRING); // Shared. |
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378 | |
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379 | findData(BEAM, (char *)"BEAM", TSHORT); // Additional. |
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380 | findData(IF, (char *)"IF", TSHORT); // Additional. |
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381 | findData(FqRefVal, fqCRVAL, TDOUBLE); // Frequency reference value. |
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382 | findData(FqDelt, fqCDELT, TDOUBLE); // Frequency increment. |
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383 | findData(FqRefPix, fqCRPIX, TFLOAT); // Frequency reference pixel. |
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384 | findData(RA, raCRVAL, TDOUBLE); // Right ascension. |
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385 | findData(DEC, decCRVAL, TDOUBLE); // Declination. |
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386 | findData(SCANRATE, (char *)"SCANRATE", TFLOAT); // Additional. |
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387 | |
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388 | findData(TSYS, (char *)"TSYS", TFLOAT); // Core. |
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389 | findData(CALFCTR, (char *)"CALFCTR", TFLOAT); // Additional. |
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390 | findData(XCALFCTR, (char *)"XCALFCTR", TFLOAT); // Additional. |
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391 | findData(BASELIN, (char *)"BASELIN", TFLOAT); // Additional. |
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392 | findData(BASESUB, (char *)"BASESUB", TFLOAT); // Additional. |
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393 | findData(XPOLDATA, (char *)"XPOLDATA", TFLOAT); // Additional. |
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394 | |
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395 | findData(REFBEAM, (char *)"REFBEAM", TSHORT); // Additional. |
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396 | findData(TCAL, (char *)"TCAL", TFLOAT); // Shared. |
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397 | findData(TCALTIME, (char *)"TCALTIME", TSTRING); // Additional. |
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398 | findData(AZIMUTH, (char *)"AZIMUTH", TFLOAT); // Shared. |
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399 | findData(ELEVATIO, (char *)"ELEVATIO", TFLOAT); // Shared. |
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400 | findData(PARANGLE, (char *)"PARANGLE", TFLOAT); // Additional. |
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401 | findData(FOCUSAXI, (char *)"FOCUSAXI", TFLOAT); // Additional. |
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402 | findData(FOCUSTAN, (char *)"FOCUSTAN", TFLOAT); // Additional. |
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403 | findData(FOCUSROT, (char *)"FOCUSROT", TFLOAT); // Additional. |
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404 | findData(TAMBIENT, (char *)"TAMBIENT", TFLOAT); // Shared. |
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405 | findData(PRESSURE, (char *)"PRESSURE", TFLOAT); // Shared. |
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406 | findData(HUMIDITY, (char *)"HUMIDITY", TFLOAT); // Shared. |
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407 | findData(WINDSPEE, (char *)"WINDSPEE", TFLOAT); // Shared. |
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408 | findData(WINDDIRE, (char *)"WINDDIRE", TFLOAT); // Shared. |
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409 | |
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410 | findData(STOKES, polCRVAL, TINT); |
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411 | findData(SIG, (char *)"SIG", TSTRING); |
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412 | findData(CAL, (char *)"CAL", TSTRING); |
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413 | |
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414 | findData(RVSYS, (char *)"RVSYS", TDOUBLE); |
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415 | findData(VFRAME, (char *)"VFRAME", TDOUBLE); |
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416 | findData(VELDEF, (char *)"VELDEF", TSTRING); |
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417 | |
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418 | if (cStatus) { |
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419 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
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420 | close(); |
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421 | return 1; |
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422 | } |
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423 | |
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424 | |
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425 | // Check for alternative column names. |
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426 | if (cALFA) { |
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427 | // ALFA data. |
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428 | cALFAscan = 0; |
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429 | cScanNo = 0; |
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430 | if (cALFA_CIMA) { |
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431 | findData(SCAN, (char *)"SCAN_ID", TINT); |
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432 | if (cALFA_CIMA > 1) { |
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433 | // Note that RECNUM increases by cNAxisTime per row. |
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434 | findData(CYCLE, (char *)"RECNUM", TINT); |
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435 | } else { |
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436 | findData(CYCLE, (char *)"SUBSCAN", TINT); |
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437 | } |
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438 | } else if (cALFA_BD) { |
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439 | findData(SCAN, (char *)"SCAN_NUMBER", TINT); |
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440 | findData(CYCLE, (char *)"PATTERN_NUMBER", TINT); |
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441 | } |
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442 | } else { |
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443 | readData(SCAN, 1, &cFirstScanNo); |
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444 | } |
---|
445 | |
---|
446 | cCycleNo = 0; |
---|
447 | cLastUTC = 0.0; |
---|
448 | for ( int i = 0 ; i < 4 ; i++ ) { |
---|
449 | cGLastUTC[i] = 0.0 ; |
---|
450 | cGLastScan[i] = -1 ; |
---|
451 | cGCycleNo[i] = 0 ; |
---|
452 | } |
---|
453 | |
---|
454 | // Beam number, 1-relative by default. |
---|
455 | cBeam_1rel = 1; |
---|
456 | if (cALFA) { |
---|
457 | // ALFA INPUT_ID, 0-relative (overrides BEAM column if present). |
---|
458 | findData(BEAM, (char *)"INPUT_ID", TSHORT); |
---|
459 | cBeam_1rel = 0; |
---|
460 | |
---|
461 | } else if (cData[BEAM].colnum < 0) { |
---|
462 | if (beamCRVAL) { |
---|
463 | // There is a BEAM axis. |
---|
464 | findData(BEAM, beamCRVAL, TDOUBLE); |
---|
465 | } else { |
---|
466 | // ms2sdfits output, 0-relative "feed" number. |
---|
467 | findData(BEAM, (char *)"MAIN_FEED1", TSHORT); |
---|
468 | cBeam_1rel = 0; |
---|
469 | } |
---|
470 | } |
---|
471 | |
---|
472 | // IF number, 1-relative by default. |
---|
473 | cIF_1rel = 1; |
---|
474 | if (cALFA && cData[IF].colnum < 0) { |
---|
475 | // ALFA data, 0-relative. |
---|
476 | if (cALFA_CIMA > 1) { |
---|
477 | findData(IF, (char *)"IFN", TSHORT); |
---|
478 | } else { |
---|
479 | findData(IF, (char *)"IFVAL", TSHORT); |
---|
480 | } |
---|
481 | cIF_1rel = 0; |
---|
482 | } |
---|
483 | |
---|
484 | // ms2sdfits writes a scalar "TSYS" column that averages the polarizations. |
---|
485 | int colnum; |
---|
486 | findCol((char *)"SYSCAL_TSYS", &colnum); |
---|
487 | if (colnum > 0) { |
---|
488 | // This contains the vector Tsys. |
---|
489 | findData(TSYS, (char *)"SYSCAL_TSYS", TFLOAT); |
---|
490 | } |
---|
491 | |
---|
492 | // XPOLDATA? |
---|
493 | |
---|
494 | if (cData[SCANRATE].colnum < 0) { |
---|
495 | findData(SCANRATE, (char *)"FIELD_POINTING_DIR_RATE", TFLOAT); |
---|
496 | } |
---|
497 | |
---|
498 | if (cData[RESTFRQ].colnum < 0) { |
---|
499 | findData(RESTFRQ, (char *)"RESTFREQ", TDOUBLE); |
---|
500 | if (cData[RESTFRQ].colnum < 0) { |
---|
501 | findData(RESTFRQ, (char *)"SPECTRAL_WINDOW_REST_FREQUENCY", TDOUBLE); |
---|
502 | } |
---|
503 | } |
---|
504 | |
---|
505 | if (cData[OBJ_RA].colnum < 0) { |
---|
506 | findData(OBJ_RA, (char *)"SOURCE_DIRECTION", TDOUBLE); |
---|
507 | } |
---|
508 | if (cData[OBJ_DEC].colnum < 0) { |
---|
509 | findData(OBJ_DEC, (char *)"SOURCE_DIRECTION", TDOUBLE); |
---|
510 | } |
---|
511 | |
---|
512 | // REFBEAM? |
---|
513 | |
---|
514 | if (cData[TCAL].colnum < 0) { |
---|
515 | findData(TCAL, (char *)"SYSCAL_TCAL", TFLOAT); |
---|
516 | } else if (cALFA_BD) { |
---|
517 | // ALFA BDFITS has a different TCAL with 64 elements - kill it! |
---|
518 | findData(TCAL, (char *)"NO NO NO", TFLOAT); |
---|
519 | } |
---|
520 | |
---|
521 | if (cALFA_BD) { |
---|
522 | // ALFA BDFITS. |
---|
523 | findData(AZIMUTH, (char *)(char *)"CRVAL2B", TFLOAT); |
---|
524 | findData(ELEVATIO, (char *)(char *)"CRVAL3B", TFLOAT); |
---|
525 | } |
---|
526 | |
---|
527 | if (cALFA) { |
---|
528 | // ALFA data. |
---|
529 | findData(PARANGLE, (char *)"PARA_ANG", TFLOAT); |
---|
530 | } |
---|
531 | |
---|
532 | if (cData[TAMBIENT].colnum < 0) { |
---|
533 | findData(TAMBIENT, (char *)"WEATHER_TEMPERATURE", TFLOAT); |
---|
534 | } |
---|
535 | |
---|
536 | if (cData[PRESSURE].colnum < 0) { |
---|
537 | findData(PRESSURE, (char *)"WEATHER_PRESSURE", TFLOAT); |
---|
538 | } |
---|
539 | |
---|
540 | if (cData[HUMIDITY].colnum < 0) { |
---|
541 | findData(HUMIDITY, (char *)"WEATHER_REL_HUMIDITY", TFLOAT); |
---|
542 | } |
---|
543 | |
---|
544 | if (cData[WINDSPEE].colnum < 0) { |
---|
545 | findData(WINDSPEE, (char *)"WEATHER_WIND_SPEED", TFLOAT); |
---|
546 | } |
---|
547 | |
---|
548 | if (cData[WINDDIRE].colnum < 0) { |
---|
549 | findData(WINDDIRE, (char *)"WEATHER_WIND_DIRECTION", TFLOAT); |
---|
550 | } |
---|
551 | |
---|
552 | |
---|
553 | // Find the number of rows. |
---|
554 | fits_get_num_rows(cSDptr, &cNRow, &cStatus); |
---|
555 | if (!cNRow) { |
---|
556 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "Table contains no entries."); |
---|
557 | close(); |
---|
558 | return 1; |
---|
559 | } |
---|
560 | |
---|
561 | |
---|
562 | // Determine which beams are present in the data. |
---|
563 | if (cData[BEAM].colnum > 0) { |
---|
564 | short *beamCol = new short[cNRow]; |
---|
565 | short beamNul = 1; |
---|
566 | int anynul; |
---|
567 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
568 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
569 | delete [] beamCol; |
---|
570 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
571 | close(); |
---|
572 | return 1; |
---|
573 | } |
---|
574 | |
---|
575 | // Find the maximum beam number. |
---|
576 | cNBeam = cBeam_1rel - 1; |
---|
577 | for (int irow = 0; irow < cNRow; irow++) { |
---|
578 | if (beamCol[irow] > cNBeam) { |
---|
579 | cNBeam = beamCol[irow]; |
---|
580 | } |
---|
581 | |
---|
582 | // Check validity. |
---|
583 | if (beamCol[irow] < cBeam_1rel) { |
---|
584 | delete [] beamCol; |
---|
585 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "SDFITS file contains invalid beam number."); |
---|
586 | close(); |
---|
587 | return 1; |
---|
588 | } |
---|
589 | } |
---|
590 | |
---|
591 | if (!cBeam_1rel) cNBeam++; |
---|
592 | |
---|
593 | // Find all beams present in the data. |
---|
594 | cBeams = new int[cNBeam]; |
---|
595 | for (int ibeam = 0; ibeam < cNBeam; ibeam++) { |
---|
596 | cBeams[ibeam] = 0; |
---|
597 | } |
---|
598 | |
---|
599 | for (int irow = 0; irow < cNRow; irow++) { |
---|
600 | cBeams[beamCol[irow] - cBeam_1rel] = 1; |
---|
601 | } |
---|
602 | |
---|
603 | delete [] beamCol; |
---|
604 | |
---|
605 | } else { |
---|
606 | // No BEAM column. |
---|
607 | cNBeam = 1; |
---|
608 | cBeams = new int[1]; |
---|
609 | cBeams[0] = 1; |
---|
610 | } |
---|
611 | |
---|
612 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
613 | // modify its elements directly. |
---|
614 | nBeam = cNBeam; |
---|
615 | beams = cBeams; |
---|
616 | |
---|
617 | |
---|
618 | // Determine which IFs are present in the data. |
---|
619 | if (cData[IF].colnum > 0) { |
---|
620 | short *IFCol = new short[cNRow]; |
---|
621 | short IFNul = 1; |
---|
622 | int anynul; |
---|
623 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
624 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
625 | delete [] IFCol; |
---|
626 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
627 | close(); |
---|
628 | return 1; |
---|
629 | } |
---|
630 | |
---|
631 | // Find the maximum IF number. |
---|
632 | cNIF = cIF_1rel - 1; |
---|
633 | for (int irow = 0; irow < cNRow; irow++) { |
---|
634 | if (IFCol[irow] > cNIF) { |
---|
635 | cNIF = IFCol[irow]; |
---|
636 | } |
---|
637 | |
---|
638 | // Check validity. |
---|
639 | if (IFCol[irow] < cIF_1rel) { |
---|
640 | delete [] IFCol; |
---|
641 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "SDFITS file contains invalid IF number."); |
---|
642 | close(); |
---|
643 | return 1; |
---|
644 | } |
---|
645 | } |
---|
646 | |
---|
647 | if (!cIF_1rel) cNIF++; |
---|
648 | |
---|
649 | // Find all IFs present in the data. |
---|
650 | cIFs = new int[cNIF]; |
---|
651 | cNChan = new int[cNIF]; |
---|
652 | cNPol = new int[cNIF]; |
---|
653 | cHaveXPol = new int[cNIF]; |
---|
654 | cGetXPol = 0; |
---|
655 | |
---|
656 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
657 | cIFs[iIF] = 0; |
---|
658 | cNChan[iIF] = 0; |
---|
659 | cNPol[iIF] = 0; |
---|
660 | cHaveXPol[iIF] = 0; |
---|
661 | } |
---|
662 | |
---|
663 | for (int irow = 0; irow < cNRow; irow++) { |
---|
664 | int iIF = IFCol[irow] - cIF_1rel; |
---|
665 | if (cIFs[iIF] == 0) { |
---|
666 | cIFs[iIF] = 1; |
---|
667 | |
---|
668 | // Find the axis lengths. |
---|
669 | if (cHaveSpectra) { |
---|
670 | if (cData[DATA].nelem < 0) { |
---|
671 | // Variable dimension array. |
---|
672 | if (readDim(DATA, irow+1, &cNAxes, cNAxis)) { |
---|
673 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
674 | close(); |
---|
675 | return 1; |
---|
676 | } |
---|
677 | } |
---|
678 | |
---|
679 | } else { |
---|
680 | if (cData[DATAXED].colnum > 0) { |
---|
681 | char dataxed[32]; |
---|
682 | readParm((char *)"DATAXED", TSTRING, dataxed); |
---|
683 | |
---|
684 | sscanf(dataxed, "(%ld,%ld,%ld,%ld,%ld)", cNAxis, cNAxis+1, |
---|
685 | cNAxis+2, cNAxis+3, cNAxis+4); |
---|
686 | } |
---|
687 | } |
---|
688 | |
---|
689 | // Number of channels and polarizations. |
---|
690 | cNChan[iIF] = cNAxis[cFreqAxis]; |
---|
691 | cNPol[iIF] = cNAxis[cStokesAxis]; |
---|
692 | cHaveXPol[iIF] = 0; |
---|
693 | |
---|
694 | // Is cross-polarization data present? |
---|
695 | if (cData[XPOLDATA].colnum > 0) { |
---|
696 | // Check that it conforms. |
---|
697 | int nAxis; |
---|
698 | long nAxes[2]; |
---|
699 | |
---|
700 | if (readDim(XPOLDATA, irow+1, &nAxis, nAxes)) { |
---|
701 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE ); |
---|
702 | close(); |
---|
703 | return 1; |
---|
704 | } |
---|
705 | |
---|
706 | // Default is to get it if we have it. |
---|
707 | if (nAxis == 2 && |
---|
708 | nAxes[0] == 2 && |
---|
709 | nAxes[1] == cNChan[iIF]) { |
---|
710 | cGetXPol = cHaveXPol[iIF] = 1; |
---|
711 | } |
---|
712 | } |
---|
713 | } |
---|
714 | } |
---|
715 | |
---|
716 | delete [] IFCol; |
---|
717 | |
---|
718 | } else { |
---|
719 | // No IF column. |
---|
720 | cNIF = 1; |
---|
721 | cIFs = new int[1]; |
---|
722 | cIFs[0] = 1; |
---|
723 | |
---|
724 | cNChan = new int[1]; |
---|
725 | cNPol = new int[1]; |
---|
726 | cHaveXPol = new int[1]; |
---|
727 | cGetXPol = 0; |
---|
728 | |
---|
729 | // Number of channels and polarizations. |
---|
730 | cNChan[0] = cNAxis[cFreqAxis]; |
---|
731 | cNPol[0] = cNAxis[cStokesAxis]; |
---|
732 | cHaveXPol[0] = 0; |
---|
733 | } |
---|
734 | |
---|
735 | if (cALFA && cALFA_CIMA < 2) { |
---|
736 | // Older ALFA data labels each polarization as a separate IF. |
---|
737 | cNPol[0] = cNIF; |
---|
738 | cNIF = 1; |
---|
739 | } |
---|
740 | |
---|
741 | // For GBT data that stores spectra for each polarization in separate rows |
---|
742 | if ( cData[STOKES].colnum > 0 ) { |
---|
743 | int *stokesCol = new int[cNRow]; |
---|
744 | int stokesNul = 1; |
---|
745 | int anynul; |
---|
746 | if (fits_read_col(cSDptr, TINT, cData[STOKES].colnum, 1, 1, cNRow, |
---|
747 | &stokesNul, stokesCol, &anynul, &cStatus)) { |
---|
748 | delete [] stokesCol; |
---|
749 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
750 | close(); |
---|
751 | return 1; |
---|
752 | } |
---|
753 | |
---|
754 | vector<int> pols ; |
---|
755 | pols.push_back( stokesCol[0] ) ; |
---|
756 | for ( int i = 0 ; i < cNRow ; i++ ) { |
---|
757 | bool pmatch = false ; |
---|
758 | for ( uint j = 0 ; j < pols.size() ; j++ ) { |
---|
759 | if ( stokesCol[i] == pols[j] ) { |
---|
760 | pmatch = true ; |
---|
761 | break ; |
---|
762 | } |
---|
763 | } |
---|
764 | if ( !pmatch ) { |
---|
765 | pols.push_back( stokesCol[i] ) ; |
---|
766 | } |
---|
767 | } |
---|
768 | |
---|
769 | cPols = new int[pols.size()] ; |
---|
770 | for ( uint i = 0 ; i < pols.size() ; i++ ) { |
---|
771 | cPols[i] = pols[i] ; |
---|
772 | } |
---|
773 | |
---|
774 | for ( int i = 0 ; i < cNIF ; i++ ) { |
---|
775 | cNPol[i] = pols.size() ; |
---|
776 | } |
---|
777 | |
---|
778 | delete [] stokesCol ; |
---|
779 | } |
---|
780 | |
---|
781 | // Passing back the address of the array allows PKSFITSreader::select() to |
---|
782 | // modify its elements directly. |
---|
783 | nIF = cNIF; |
---|
784 | IFs = cIFs; |
---|
785 | |
---|
786 | nChan = cNChan; |
---|
787 | nPol = cNPol; |
---|
788 | haveXPol = cHaveXPol; |
---|
789 | |
---|
790 | |
---|
791 | // Default channel range selection. |
---|
792 | cStartChan = new int[cNIF]; |
---|
793 | cEndChan = new int[cNIF]; |
---|
794 | cRefChan = new int[cNIF]; |
---|
795 | |
---|
796 | for (int iIF = 0; iIF < cNIF; iIF++) { |
---|
797 | cStartChan[iIF] = 1; |
---|
798 | cEndChan[iIF] = cNChan[iIF]; |
---|
799 | cRefChan[iIF] = cNChan[iIF]/2 + 1; |
---|
800 | } |
---|
801 | |
---|
802 | // Default is to get it if we have it. |
---|
803 | cGetSpectra = cHaveSpectra; |
---|
804 | |
---|
805 | |
---|
806 | // Are baseline parameters present? |
---|
807 | cHaveBase = 0; |
---|
808 | if (cData[BASELIN].colnum) { |
---|
809 | // Check that it conforms. |
---|
810 | int nAxis, status = 0; |
---|
811 | long nAxes[2]; |
---|
812 | |
---|
813 | if (fits_read_tdim(cSDptr, cData[BASELIN].colnum, 2, &nAxis, nAxes, |
---|
814 | &status) == 0) { |
---|
815 | cHaveBase = (nAxis == 2); |
---|
816 | } |
---|
817 | } |
---|
818 | haveBase = cHaveBase; |
---|
819 | |
---|
820 | |
---|
821 | // Is extra system calibration data available? |
---|
822 | cExtraSysCal = 0; |
---|
823 | for (int iparm = REFBEAM; iparm < NDATA; iparm++) { |
---|
824 | if (cData[iparm].colnum >= 0) { |
---|
825 | cExtraSysCal = 1; |
---|
826 | break; |
---|
827 | } |
---|
828 | } |
---|
829 | |
---|
830 | extraSysCal = cExtraSysCal; |
---|
831 | |
---|
832 | |
---|
833 | // Extras for ALFA data. |
---|
834 | cALFAacc = 0.0f; |
---|
835 | if (cALFA_CIMA > 1) { |
---|
836 | // FFTs per second when the Mock correlator operates in RFI blanking mode. |
---|
837 | readData((char *)"PHFFTACC", TFLOAT, 0, &cALFAacc); |
---|
838 | } |
---|
839 | |
---|
840 | |
---|
841 | cRow = 0; |
---|
842 | cTimeIdx = cNAxisTime; |
---|
843 | |
---|
844 | return 0; |
---|
845 | } |
---|
846 | |
---|
847 | //---------------------------------------------------- SDFITSreader::getHeader |
---|
848 | |
---|
849 | // Get parameters describing the data. |
---|
850 | |
---|
851 | int SDFITSreader::getHeader( |
---|
852 | char observer[32], |
---|
853 | char project[32], |
---|
854 | char telescope[32], |
---|
855 | double antPos[3], |
---|
856 | char obsMode[32], |
---|
857 | char bunit[32], |
---|
858 | float &equinox, |
---|
859 | char radecsys[32], |
---|
860 | char dopplerFrame[32], |
---|
861 | char datobs[32], |
---|
862 | double &utc, |
---|
863 | double &refFreq, |
---|
864 | double &bandwidth) |
---|
865 | { |
---|
866 | const string methodName = "getHeader()" ; |
---|
867 | |
---|
868 | // Has the file been opened? |
---|
869 | if (!cSDptr) { |
---|
870 | return 1; |
---|
871 | } |
---|
872 | |
---|
873 | // Read parameter values. |
---|
874 | readParm((char *)"OBSERVER", TSTRING, observer); // Shared. |
---|
875 | readParm((char *)"PROJID", TSTRING, project); // Shared. |
---|
876 | readParm((char *)"TELESCOP", TSTRING, telescope); // Core. |
---|
877 | |
---|
878 | antPos[0] = 0.0; |
---|
879 | antPos[1] = 0.0; |
---|
880 | antPos[2] = 0.0; |
---|
881 | if (readParm((char *)"ANTENNA_POSITION", TDOUBLE, antPos)) { |
---|
882 | readParm((char *)"OBSGEO-X", TDOUBLE, antPos); // Additional. |
---|
883 | readParm((char *)"OBSGEO-Y", TDOUBLE, antPos + 1); // Additional. |
---|
884 | readParm((char *)"OBSGEO-Z", TDOUBLE, antPos + 2); // Additional. |
---|
885 | } |
---|
886 | |
---|
887 | if (antPos[0] == 0.0) { |
---|
888 | if (strncmp(telescope, "ATPKS", 5) == 0) { |
---|
889 | // Parkes coordinates. |
---|
890 | antPos[0] = -4554232.087; |
---|
891 | antPos[1] = 2816759.046; |
---|
892 | antPos[2] = -3454035.950; |
---|
893 | } else if (strncmp(telescope, "ATMOPRA", 7) == 0) { |
---|
894 | // Mopra coordinates. |
---|
895 | antPos[0] = -4682768.630; |
---|
896 | antPos[1] = 2802619.060; |
---|
897 | antPos[2] = -3291759.900; |
---|
898 | } else if (strncmp(telescope, "ARECIBO", 7) == 0) { |
---|
899 | // Arecibo coordinates. |
---|
900 | antPos[0] = 2390486.900; |
---|
901 | antPos[1] = -5564731.440; |
---|
902 | antPos[2] = 1994720.450; |
---|
903 | } |
---|
904 | } |
---|
905 | |
---|
906 | readData(OBSMODE, 1, obsMode); // Shared. |
---|
907 | |
---|
908 | // Brightness unit. |
---|
909 | if (cData[DATAXED].colnum >= 0) { |
---|
910 | strcpy(bunit, "Jy"); |
---|
911 | } else { |
---|
912 | strcpy(bunit, cData[DATA].units); |
---|
913 | } |
---|
914 | |
---|
915 | if (strcmp(bunit, "JY") == 0) { |
---|
916 | bunit[1] = 'y'; |
---|
917 | } else if (strcmp(bunit, "JY/BEAM") == 0) { |
---|
918 | strcpy(bunit, "Jy/beam"); |
---|
919 | } |
---|
920 | |
---|
921 | readParm((char *)"EQUINOX", TFLOAT, &equinox); // Shared. |
---|
922 | if (cStatus == 405) { |
---|
923 | // EQUINOX was written as string value in early versions. |
---|
924 | cStatus = 0; |
---|
925 | char strtmp[32]; |
---|
926 | readParm((char *)"EQUINOX", TSTRING, strtmp); |
---|
927 | sscanf(strtmp, "%f", &equinox); |
---|
928 | } |
---|
929 | |
---|
930 | if (readParm((char *)"RADESYS", TSTRING, radecsys)) { // Additional. |
---|
931 | if (readParm((char *)"RADECSYS", TSTRING, radecsys)) { // Additional. |
---|
932 | strcpy(radecsys, ""); |
---|
933 | } |
---|
934 | } |
---|
935 | |
---|
936 | if (readParm((char *)"SPECSYS", TSTRING, dopplerFrame)) { // Additional. |
---|
937 | // Fallback value. |
---|
938 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
939 | |
---|
940 | // Look for VELFRAME, written by earlier versions of Livedata. |
---|
941 | // |
---|
942 | // Added few more codes currently (as of 2009 Oct) used in the GBT |
---|
943 | // SDFITS (based io_sdfits_define.pro of GBTIDL). - TT |
---|
944 | if (readParm((char *)"VELFRAME", TSTRING, dopplerFrame)) { // Additional. |
---|
945 | // No, try digging it out of the CTYPE card (AIPS convention). |
---|
946 | char keyw[9], ctype[9]; |
---|
947 | sprintf(keyw, "CTYPE%ld", cFreqAxis+1); |
---|
948 | readParm(keyw, TSTRING, ctype); |
---|
949 | |
---|
950 | if (strncmp(ctype, "FREQ-", 5) == 0) { |
---|
951 | strcpy(dopplerFrame, ctype+5); |
---|
952 | if (strcmp(dopplerFrame, "LSR") == 0) { |
---|
953 | // LSR unqualified usually means LSR (kinematic). |
---|
954 | strcpy(dopplerFrame, "LSRK"); |
---|
955 | } else if (strcmp(dopplerFrame, "LSD") == 0) { |
---|
956 | // LSR as a dynamical defintion |
---|
957 | strcpy(dopplerFrame, "LSRD"); |
---|
958 | } else if (strcmp(dopplerFrame, "HEL") == 0) { |
---|
959 | // Almost certainly barycentric. |
---|
960 | strcpy(dopplerFrame, "BARYCENT"); |
---|
961 | } else if (strcmp(dopplerFrame, "BAR") == 0) { |
---|
962 | // barycentric. |
---|
963 | strcpy(dopplerFrame, "BARYCENT"); |
---|
964 | } else if (strcmp(dopplerFrame, "OBS") == 0) { |
---|
965 | // observed or topocentric. |
---|
966 | strcpy(dopplerFrame, "TOPO"); |
---|
967 | } else if (strcmp(dopplerFrame, "GEO") == 0) { |
---|
968 | // geocentric |
---|
969 | strcpy(dopplerFrame, "GEO"); |
---|
970 | } else if (strcmp(dopplerFrame, "GAL") == 0) { |
---|
971 | // galactic |
---|
972 | strcpy(dopplerFrame, "GAL"); |
---|
973 | } else if (strcmp(dopplerFrame, "LGR") == 0) { |
---|
974 | // Local group |
---|
975 | strcpy(dopplerFrame, "LGROUP"); |
---|
976 | } else if (strcmp(dopplerFrame, "CMB") == 0) { |
---|
977 | // Cosimic Microwave Backgroup |
---|
978 | strcpy(dopplerFrame, "CMB"); |
---|
979 | } |
---|
980 | } else { |
---|
981 | strcpy(dopplerFrame, ""); |
---|
982 | } |
---|
983 | } |
---|
984 | // Translate to FITS standard names. |
---|
985 | if (strncmp(dopplerFrame, "TOP", 3) == 0) { |
---|
986 | strcpy(dopplerFrame, "TOPOCENT"); |
---|
987 | } else if (strncmp(dopplerFrame, "GEO", 3) == 0) { |
---|
988 | strcpy(dopplerFrame, "GEOCENTR"); |
---|
989 | } else if (strncmp(dopplerFrame, "HEL", 3) == 0) { |
---|
990 | strcpy(dopplerFrame, "HELIOCEN"); |
---|
991 | } else if (strncmp(dopplerFrame, "BARY", 4) == 0) { |
---|
992 | strcpy(dopplerFrame, "BARYCENT"); |
---|
993 | } else if (strncmp(dopplerFrame, "GAL", 3) == 0) { |
---|
994 | strcpy(dopplerFrame, "GALACTOC"); |
---|
995 | } else if (strncmp(dopplerFrame, "LGROUP", 6) == 0) { |
---|
996 | strcpy(dopplerFrame, "LOCALGRP"); |
---|
997 | } else if (strncmp(dopplerFrame, "CMB", 3) == 0) { |
---|
998 | strcpy(dopplerFrame, "CMBDIPOL"); |
---|
999 | } |
---|
1000 | } |
---|
1001 | |
---|
1002 | if (cStatus) { |
---|
1003 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1004 | return 1; |
---|
1005 | } |
---|
1006 | |
---|
1007 | // Get parameters from first row of table. |
---|
1008 | readTime(1, 1, datobs, utc); |
---|
1009 | readData(FqRefVal, 1, &refFreq); |
---|
1010 | readParm((char *)"BANDWID", TDOUBLE, &bandwidth); // Core. |
---|
1011 | |
---|
1012 | if (cStatus) { |
---|
1013 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1014 | return 1; |
---|
1015 | } |
---|
1016 | |
---|
1017 | return 0; |
---|
1018 | } |
---|
1019 | |
---|
1020 | //-------------------------------------------------- SDFITSreader::getFreqInfo |
---|
1021 | |
---|
1022 | // Get frequency parameters for each IF. |
---|
1023 | |
---|
1024 | int SDFITSreader::getFreqInfo( |
---|
1025 | int &nIF, |
---|
1026 | double* &startFreq, |
---|
1027 | double* &endFreq) |
---|
1028 | { |
---|
1029 | const string methodName = "getFreqInfo()" ; |
---|
1030 | |
---|
1031 | float fqRefPix; |
---|
1032 | double fqDelt, fqRefVal; |
---|
1033 | |
---|
1034 | nIF = cNIF; |
---|
1035 | startFreq = new double[nIF]; |
---|
1036 | endFreq = new double[nIF]; |
---|
1037 | |
---|
1038 | if (cData[IF].colnum > 0) { |
---|
1039 | short *IFCol = new short[cNRow]; |
---|
1040 | short IFNul = 1; |
---|
1041 | int anynul; |
---|
1042 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
1043 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
1044 | delete [] IFCol; |
---|
1045 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1046 | close(); |
---|
1047 | return 1; |
---|
1048 | } |
---|
1049 | |
---|
1050 | for (int iIF = 0; iIF < nIF; iIF++) { |
---|
1051 | if (cIFs[iIF]) { |
---|
1052 | // Find the first occurrence of this IF in the table. |
---|
1053 | int IFno = iIF + cIF_1rel; |
---|
1054 | for (int irow = 0; irow < cNRow;) { |
---|
1055 | if (IFCol[irow++] == IFno) { |
---|
1056 | readData(FqRefPix, irow, &fqRefPix); |
---|
1057 | readData(FqRefVal, irow, &fqRefVal); |
---|
1058 | readData(FqDelt, irow, &fqDelt); |
---|
1059 | |
---|
1060 | if (cALFA_BD) { |
---|
1061 | unsigned char invert; |
---|
1062 | readData((char *)"UPPERSB", TBYTE, irow, &invert); |
---|
1063 | |
---|
1064 | if (invert) { |
---|
1065 | fqDelt = -fqDelt; |
---|
1066 | } |
---|
1067 | } |
---|
1068 | |
---|
1069 | startFreq[iIF] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
1070 | endFreq[iIF] = fqRefVal + (cNChan[iIF] - fqRefPix) * fqDelt; |
---|
1071 | |
---|
1072 | break; |
---|
1073 | } |
---|
1074 | } |
---|
1075 | |
---|
1076 | } else { |
---|
1077 | startFreq[iIF] = 0.0; |
---|
1078 | endFreq[iIF] = 0.0; |
---|
1079 | } |
---|
1080 | } |
---|
1081 | |
---|
1082 | delete [] IFCol; |
---|
1083 | |
---|
1084 | } else { |
---|
1085 | // No IF column, read the first table entry. |
---|
1086 | readData(FqRefPix, 1, &fqRefPix); |
---|
1087 | readData(FqRefVal, 1, &fqRefVal); |
---|
1088 | readData(FqDelt, 1, &fqDelt); |
---|
1089 | |
---|
1090 | startFreq[0] = fqRefVal + ( 1 - fqRefPix) * fqDelt; |
---|
1091 | endFreq[0] = fqRefVal + (cNChan[0] - fqRefPix) * fqDelt; |
---|
1092 | } |
---|
1093 | |
---|
1094 | return cStatus; |
---|
1095 | } |
---|
1096 | |
---|
1097 | //---------------------------------------------------- SDFITSreader::findRange |
---|
1098 | |
---|
1099 | // Find the range of the data in time and position. |
---|
1100 | |
---|
1101 | int SDFITSreader::findRange( |
---|
1102 | int &nRow, |
---|
1103 | int &nSel, |
---|
1104 | char dateSpan[2][32], |
---|
1105 | double utcSpan[2], |
---|
1106 | double* &positions) |
---|
1107 | { |
---|
1108 | const string methodName = "findRange()" ; |
---|
1109 | |
---|
1110 | // Has the file been opened? |
---|
1111 | if (!cSDptr) { |
---|
1112 | return 1; |
---|
1113 | } |
---|
1114 | |
---|
1115 | nRow = cNRow; |
---|
1116 | |
---|
1117 | // Find the number of rows selected. |
---|
1118 | short *sel = new short[cNRow]; |
---|
1119 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1120 | sel[irow] = 1; |
---|
1121 | } |
---|
1122 | |
---|
1123 | int anynul; |
---|
1124 | if (cData[BEAM].colnum > 0) { |
---|
1125 | short *beamCol = new short[cNRow]; |
---|
1126 | short beamNul = 1; |
---|
1127 | if (fits_read_col(cSDptr, TSHORT, cData[BEAM].colnum, 1, 1, cNRow, |
---|
1128 | &beamNul, beamCol, &anynul, &cStatus)) { |
---|
1129 | delete [] beamCol; |
---|
1130 | delete [] sel; |
---|
1131 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1132 | return 1; |
---|
1133 | } |
---|
1134 | |
---|
1135 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1136 | if (!cBeams[beamCol[irow]-cBeam_1rel]) { |
---|
1137 | sel[irow] = 0; |
---|
1138 | } |
---|
1139 | } |
---|
1140 | |
---|
1141 | delete [] beamCol; |
---|
1142 | } |
---|
1143 | |
---|
1144 | if (cData[IF].colnum > 0) { |
---|
1145 | short *IFCol = new short[cNRow]; |
---|
1146 | short IFNul = 1; |
---|
1147 | if (fits_read_col(cSDptr, TSHORT, cData[IF].colnum, 1, 1, cNRow, |
---|
1148 | &IFNul, IFCol, &anynul, &cStatus)) { |
---|
1149 | delete [] IFCol; |
---|
1150 | delete [] sel; |
---|
1151 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1152 | return 1; |
---|
1153 | } |
---|
1154 | |
---|
1155 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1156 | if (!cIFs[IFCol[irow]-cIF_1rel]) { |
---|
1157 | sel[irow] = 0; |
---|
1158 | } |
---|
1159 | } |
---|
1160 | |
---|
1161 | delete [] IFCol; |
---|
1162 | } |
---|
1163 | |
---|
1164 | nSel = 0; |
---|
1165 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1166 | nSel += sel[irow]; |
---|
1167 | } |
---|
1168 | |
---|
1169 | |
---|
1170 | // Find the time range assuming the data is in chronological order. |
---|
1171 | readTime(1, 1, dateSpan[0], utcSpan[0]); |
---|
1172 | readTime(cNRow, cNAxisTime, dateSpan[1], utcSpan[1]); |
---|
1173 | |
---|
1174 | |
---|
1175 | // Retrieve positions for selected data. |
---|
1176 | int isel = 0; |
---|
1177 | positions = new double[2*nSel]; |
---|
1178 | |
---|
1179 | if (cCoordSys == 1) { |
---|
1180 | // Horizontal (Az,El). |
---|
1181 | if (cData[AZIMUTH].colnum < 0 || |
---|
1182 | cData[ELEVATIO].colnum < 0) { |
---|
1183 | log(LogOrigin( className, methodName, WHERE ), LogIO::WARN, "Azimuth/elevation information absent."); |
---|
1184 | cStatus = -1; |
---|
1185 | |
---|
1186 | } else { |
---|
1187 | float *az = new float[cNRow]; |
---|
1188 | float *el = new float[cNRow]; |
---|
1189 | readCol(AZIMUTH, az); |
---|
1190 | readCol(ELEVATIO, el); |
---|
1191 | |
---|
1192 | if (!cStatus) { |
---|
1193 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1194 | if (sel[irow]) { |
---|
1195 | positions[isel++] = az[irow] * D2R; |
---|
1196 | positions[isel++] = el[irow] * D2R; |
---|
1197 | } |
---|
1198 | } |
---|
1199 | } |
---|
1200 | |
---|
1201 | delete [] az; |
---|
1202 | delete [] el; |
---|
1203 | } |
---|
1204 | |
---|
1205 | } else if (cCoordSys == 3) { |
---|
1206 | // ZPA-EL. |
---|
1207 | if (cData[BEAM].colnum < 0 || |
---|
1208 | cData[FOCUSROT].colnum < 0 || |
---|
1209 | cData[ELEVATIO].colnum < 0) { |
---|
1210 | log(LogOrigin( className, methodName, WHERE ), LogIO::WARN, "ZPA/elevation information absent."); |
---|
1211 | cStatus = -1; |
---|
1212 | |
---|
1213 | } else { |
---|
1214 | short *beam = new short[cNRow]; |
---|
1215 | float *rot = new float[cNRow]; |
---|
1216 | float *el = new float[cNRow]; |
---|
1217 | readCol(BEAM, beam); |
---|
1218 | readCol(FOCUSROT, rot); |
---|
1219 | readCol(ELEVATIO, el); |
---|
1220 | |
---|
1221 | if (!cStatus) { |
---|
1222 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1223 | if (sel[irow]) { |
---|
1224 | Int beamNo = beam[irow]; |
---|
1225 | Double zpa = rot[irow]; |
---|
1226 | if (beamNo > 1) { |
---|
1227 | // Beam geometry for the Parkes multibeam. |
---|
1228 | if (beamNo < 8) { |
---|
1229 | zpa += -60.0 + 60.0*(beamNo-2); |
---|
1230 | } else { |
---|
1231 | zpa += -90.0 + 60.0*(beamNo-8); |
---|
1232 | } |
---|
1233 | |
---|
1234 | if (zpa < -180.0) { |
---|
1235 | zpa += 360.0; |
---|
1236 | } else if (zpa > 180.0) { |
---|
1237 | zpa -= 360.0; |
---|
1238 | } |
---|
1239 | } |
---|
1240 | |
---|
1241 | positions[isel++] = zpa * D2R; |
---|
1242 | positions[isel++] = el[irow] * D2R; |
---|
1243 | } |
---|
1244 | } |
---|
1245 | } |
---|
1246 | |
---|
1247 | delete [] beam; |
---|
1248 | delete [] rot; |
---|
1249 | delete [] el; |
---|
1250 | } |
---|
1251 | |
---|
1252 | } else { |
---|
1253 | double *ra = new double[cNRow]; |
---|
1254 | double *dec = new double[cNRow]; |
---|
1255 | readCol(RA, ra); |
---|
1256 | readCol(DEC, dec); |
---|
1257 | |
---|
1258 | if (cStatus) { |
---|
1259 | delete [] ra; |
---|
1260 | delete [] dec; |
---|
1261 | goto cleanup; |
---|
1262 | } |
---|
1263 | |
---|
1264 | if (cALFA_BD) { |
---|
1265 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1266 | // Convert hours to degrees. |
---|
1267 | ra[irow] *= 15.0; |
---|
1268 | } |
---|
1269 | } |
---|
1270 | |
---|
1271 | if (cCoordSys == 0) { |
---|
1272 | // Equatorial (RA,Dec). |
---|
1273 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1274 | if (sel[irow]) { |
---|
1275 | positions[isel++] = ra[irow] * D2R; |
---|
1276 | positions[isel++] = dec[irow] * D2R; |
---|
1277 | } |
---|
1278 | } |
---|
1279 | |
---|
1280 | } else if (cCoordSys == 2) { |
---|
1281 | // Feed-plane. |
---|
1282 | if (cData[OBJ_RA].colnum < 0 || |
---|
1283 | cData[OBJ_DEC].colnum < 0 || |
---|
1284 | cData[PARANGLE].colnum < 0 || |
---|
1285 | cData[FOCUSROT].colnum < 0) { |
---|
1286 | log( LogOrigin( className, methodName, WHERE ), LogIO::WARN, |
---|
1287 | "Insufficient information to compute feed-plane\n" |
---|
1288 | " coordinates."); |
---|
1289 | cStatus = -1; |
---|
1290 | |
---|
1291 | } else { |
---|
1292 | double *srcRA = new double[cNRow]; |
---|
1293 | double *srcDec = new double[cNRow]; |
---|
1294 | float *par = new float[cNRow]; |
---|
1295 | float *rot = new float[cNRow]; |
---|
1296 | |
---|
1297 | readCol(OBJ_RA, srcRA); |
---|
1298 | readCol(OBJ_DEC, srcDec); |
---|
1299 | readCol(PARANGLE, par); |
---|
1300 | readCol(FOCUSROT, rot); |
---|
1301 | |
---|
1302 | if (!cStatus) { |
---|
1303 | for (int irow = 0; irow < cNRow; irow++) { |
---|
1304 | if (sel[irow]) { |
---|
1305 | // Convert to feed-plane coordinates. |
---|
1306 | Double dist, pa; |
---|
1307 | distPA(ra[irow]*D2R, dec[irow]*D2R, srcRA[irow]*D2R, |
---|
1308 | srcDec[irow]*D2R, dist, pa); |
---|
1309 | |
---|
1310 | Double spin = (par[irow] + rot[irow])*D2R - pa; |
---|
1311 | if (spin > 2.0*PI) spin -= 2.0*PI; |
---|
1312 | Double squint = PI/2.0 - dist; |
---|
1313 | |
---|
1314 | positions[isel++] = spin; |
---|
1315 | positions[isel++] = squint; |
---|
1316 | } |
---|
1317 | } |
---|
1318 | } |
---|
1319 | |
---|
1320 | delete [] srcRA; |
---|
1321 | delete [] srcDec; |
---|
1322 | delete [] par; |
---|
1323 | delete [] rot; |
---|
1324 | } |
---|
1325 | } |
---|
1326 | |
---|
1327 | delete [] ra; |
---|
1328 | delete [] dec; |
---|
1329 | } |
---|
1330 | |
---|
1331 | cleanup: |
---|
1332 | delete [] sel; |
---|
1333 | |
---|
1334 | if (cStatus) { |
---|
1335 | nSel = 0; |
---|
1336 | delete [] positions; |
---|
1337 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1338 | cStatus = 0; |
---|
1339 | return 1; |
---|
1340 | } |
---|
1341 | |
---|
1342 | return 0; |
---|
1343 | } |
---|
1344 | |
---|
1345 | |
---|
1346 | //--------------------------------------------------------- SDFITSreader::read |
---|
1347 | |
---|
1348 | // Read the next data record. |
---|
1349 | |
---|
1350 | int SDFITSreader::read( |
---|
1351 | MBrecord &mbrec) |
---|
1352 | { |
---|
1353 | const string methodName = "read()" ; |
---|
1354 | |
---|
1355 | // Has the file been opened? |
---|
1356 | if (!cSDptr) { |
---|
1357 | return 1; |
---|
1358 | } |
---|
1359 | // Find the next selected beam and IF. |
---|
1360 | short iBeam = 0, iIF = 0; |
---|
1361 | int iPol = -1 ; |
---|
1362 | while (1) { |
---|
1363 | if (++cTimeIdx > cNAxisTime) { |
---|
1364 | if (++cRow > cNRow) break; |
---|
1365 | cTimeIdx = 1; |
---|
1366 | } |
---|
1367 | |
---|
1368 | if (cData[BEAM].colnum > 0) { |
---|
1369 | readData(BEAM, cRow, &iBeam); |
---|
1370 | |
---|
1371 | // Convert to 0-relative. |
---|
1372 | if (cBeam_1rel) iBeam--; |
---|
1373 | } |
---|
1374 | |
---|
1375 | |
---|
1376 | if (cBeams[iBeam]) { |
---|
1377 | if (cData[IF].colnum > 0) { |
---|
1378 | readData(IF, cRow, &iIF); |
---|
1379 | |
---|
1380 | // Convert to 0-relative. |
---|
1381 | if (cIF_1rel) iIF--; |
---|
1382 | } |
---|
1383 | |
---|
1384 | if (cIFs[iIF]) { |
---|
1385 | if (cALFA) { |
---|
1386 | // ALFA data, check for calibration data. |
---|
1387 | char chars[32]; |
---|
1388 | readData(OBSMODE, cRow, chars); |
---|
1389 | if (strcmp(chars, "DROP") == 0) { |
---|
1390 | // Completely flagged integration. |
---|
1391 | continue; |
---|
1392 | |
---|
1393 | } else if (strcmp(chars, "CAL") == 0) { |
---|
1394 | sReset = 1; |
---|
1395 | if (cALFA_CIMA > 1) { |
---|
1396 | for (short iPol = 0; iPol < cNPol[iIF]; iPol++) { |
---|
1397 | alfaCal(iBeam, iIF, iPol); |
---|
1398 | } |
---|
1399 | continue; |
---|
1400 | } else { |
---|
1401 | // iIF is really the polarization in older ALFA data. |
---|
1402 | alfaCal(iBeam, 0, iIF); |
---|
1403 | continue; |
---|
1404 | } |
---|
1405 | |
---|
1406 | } else { |
---|
1407 | // Reset for the next CAL record. |
---|
1408 | if (sReset) { |
---|
1409 | for (short iPol = 0; iPol < cNPol[iIF]; iPol++) { |
---|
1410 | sALFAcalNon[iBeam][iPol] = 0; |
---|
1411 | sALFAcalNoff[iBeam][iPol] = 0; |
---|
1412 | sALFAcalOn[iBeam][iPol] = 0.0f; |
---|
1413 | sALFAcalOff[iBeam][iPol] = 0.0f; |
---|
1414 | } |
---|
1415 | sReset = 0; |
---|
1416 | |
---|
1417 | sprintf(cMsg, "ALFA cal factors for beam %d: %.3e, %.3e", |
---|
1418 | iBeam+1, sALFAcal[iBeam][0], sALFAcal[iBeam][1]); |
---|
1419 | log(LogOrigin( className, methodName, WHERE ), LogIO::NORMAL, cMsg); |
---|
1420 | //logMsg(cMsg); |
---|
1421 | } |
---|
1422 | } |
---|
1423 | } |
---|
1424 | |
---|
1425 | // for GBT SDFITS |
---|
1426 | if (cData[STOKES].colnum > 0 ) { |
---|
1427 | readData(STOKES, cRow, &iPol ) ; |
---|
1428 | for ( int i = 0 ; i < cNPol[iIF] ; i++ ) { |
---|
1429 | if ( cPols[i] == iPol ) { |
---|
1430 | iPol = i ; |
---|
1431 | break ; |
---|
1432 | } |
---|
1433 | } |
---|
1434 | } |
---|
1435 | break; |
---|
1436 | } |
---|
1437 | } |
---|
1438 | } |
---|
1439 | |
---|
1440 | // EOF? |
---|
1441 | if (cRow > cNRow) { |
---|
1442 | return -1; |
---|
1443 | } |
---|
1444 | |
---|
1445 | |
---|
1446 | if (cALFA) { |
---|
1447 | int scanNo; |
---|
1448 | readData(SCAN, cRow, &scanNo); |
---|
1449 | if (scanNo != cALFAscan) { |
---|
1450 | cScanNo++; |
---|
1451 | cALFAscan = scanNo; |
---|
1452 | } |
---|
1453 | mbrec.scanNo = cScanNo; |
---|
1454 | |
---|
1455 | } else { |
---|
1456 | readData(SCAN, cRow, &mbrec.scanNo); |
---|
1457 | |
---|
1458 | // Ensure that scan number is 1-relative. |
---|
1459 | mbrec.scanNo -= (cFirstScanNo - 1); |
---|
1460 | } |
---|
1461 | |
---|
1462 | // Times. |
---|
1463 | char datobs[32]; |
---|
1464 | readTime(cRow, cTimeIdx, datobs, mbrec.utc); |
---|
1465 | strcpy(mbrec.datobs, datobs); |
---|
1466 | |
---|
1467 | if (cData[CYCLE].colnum > 0) { |
---|
1468 | readData(CYCLE, cRow, &mbrec.cycleNo); |
---|
1469 | mbrec.cycleNo += cTimeIdx - 1; |
---|
1470 | if (cALFA_BD) mbrec.cycleNo++; |
---|
1471 | } else { |
---|
1472 | // Cycle number not recorded, must do our own bookkeeping. |
---|
1473 | if (mbrec.utc != cLastUTC) { |
---|
1474 | mbrec.cycleNo = ++cCycleNo; |
---|
1475 | cLastUTC = mbrec.utc; |
---|
1476 | } |
---|
1477 | } |
---|
1478 | |
---|
1479 | if ( iPol != -1 ) { |
---|
1480 | if ( mbrec.scanNo != cGLastScan[iPol] ) { |
---|
1481 | cGLastScan[iPol] = mbrec.scanNo ; |
---|
1482 | cGCycleNo[iPol] = 0 ; |
---|
1483 | mbrec.cycleNo = ++cGCycleNo[iPol] ; |
---|
1484 | } |
---|
1485 | else { |
---|
1486 | mbrec.cycleNo = ++cGCycleNo[iPol] ; |
---|
1487 | } |
---|
1488 | } |
---|
1489 | |
---|
1490 | readData(EXPOSURE, cRow, &mbrec.exposure); |
---|
1491 | |
---|
1492 | // Source identification. |
---|
1493 | readData(OBJECT, cRow, mbrec.srcName); |
---|
1494 | |
---|
1495 | if ( iPol != -1 ) { |
---|
1496 | char obsmode[32] ; |
---|
1497 | readData( OBSMODE, cRow, obsmode ) ; |
---|
1498 | char sig[1] ; |
---|
1499 | char cal[1] ; |
---|
1500 | readData( SIG, cRow, sig ) ; |
---|
1501 | readData( CAL, cRow, cal ) ; |
---|
1502 | if ( strstr( obsmode, "PSWITCH" ) != NULL ) { |
---|
1503 | // position switch |
---|
1504 | strcat( mbrec.srcName, "_p" ) ; |
---|
1505 | if ( strstr( obsmode, "PSWITCHON" ) != NULL ) { |
---|
1506 | strcat( mbrec.srcName, "s" ) ; |
---|
1507 | } |
---|
1508 | else if ( strstr( obsmode, "PSWITCHOFF" ) != NULL ) { |
---|
1509 | strcat( mbrec.srcName, "r" ) ; |
---|
1510 | } |
---|
1511 | } |
---|
1512 | else if ( strstr( obsmode, "Nod" ) != NULL ) { |
---|
1513 | // nod |
---|
1514 | strcat( mbrec.srcName, "_n" ) ; |
---|
1515 | if ( sig[0] == 'T' ) { |
---|
1516 | strcat( mbrec.srcName, "s" ) ; |
---|
1517 | } |
---|
1518 | else { |
---|
1519 | strcat( mbrec.srcName, "r" ) ; |
---|
1520 | } |
---|
1521 | } |
---|
1522 | else if ( strstr( obsmode, "FSWITCH" ) != NULL ) { |
---|
1523 | // frequency switch |
---|
1524 | strcat( mbrec.srcName, "_f" ) ; |
---|
1525 | if ( sig[0] == 'T' ) { |
---|
1526 | strcat( mbrec.srcName, "s" ) ; |
---|
1527 | } |
---|
1528 | else { |
---|
1529 | strcat( mbrec.srcName, "r" ) ; |
---|
1530 | } |
---|
1531 | } |
---|
1532 | if ( cal[0] == 'T' ) { |
---|
1533 | strcat( mbrec.srcName, "c" ) ; |
---|
1534 | } |
---|
1535 | else { |
---|
1536 | strcat( mbrec.srcName, "o" ) ; |
---|
1537 | } |
---|
1538 | } |
---|
1539 | |
---|
1540 | readData(OBJ_RA, cRow, &mbrec.srcRA); |
---|
1541 | if (strcmp(cData[OBJ_RA].name, "OBJ-RA") == 0) { |
---|
1542 | mbrec.srcRA *= D2R; |
---|
1543 | } |
---|
1544 | |
---|
1545 | if (strcmp(cData[OBJ_DEC].name, "OBJ-DEC") == 0) { |
---|
1546 | readData(OBJ_DEC, cRow, &mbrec.srcDec); |
---|
1547 | mbrec.srcDec *= D2R; |
---|
1548 | } |
---|
1549 | |
---|
1550 | // Line rest frequency (Hz). |
---|
1551 | readData(RESTFRQ, cRow, &mbrec.restFreq); |
---|
1552 | if (mbrec.restFreq == 0.0 && cALFA_BD) { |
---|
1553 | mbrec.restFreq = 1420.40575e6; |
---|
1554 | } |
---|
1555 | |
---|
1556 | // Observation mode. |
---|
1557 | readData(OBSMODE, cRow, mbrec.obsType); |
---|
1558 | |
---|
1559 | // Beam-dependent parameters. |
---|
1560 | mbrec.beamNo = iBeam + 1; |
---|
1561 | |
---|
1562 | readData(RA, cRow, &mbrec.ra); |
---|
1563 | readData(DEC, cRow, &mbrec.dec); |
---|
1564 | mbrec.ra *= D2R; |
---|
1565 | mbrec.dec *= D2R; |
---|
1566 | |
---|
1567 | if (cALFA_BD) mbrec.ra *= 15.0; |
---|
1568 | |
---|
1569 | float scanrate[2]; |
---|
1570 | readData(SCANRATE, cRow, &scanrate); |
---|
1571 | if (strcmp(cData[SCANRATE].name, "SCANRATE") == 0) { |
---|
1572 | mbrec.raRate = scanrate[0] * D2R; |
---|
1573 | mbrec.decRate = scanrate[1] * D2R; |
---|
1574 | } |
---|
1575 | mbrec.paRate = 0.0f; |
---|
1576 | |
---|
1577 | // IF-dependent parameters. |
---|
1578 | int startChan = cStartChan[iIF]; |
---|
1579 | int endChan = cEndChan[iIF]; |
---|
1580 | int refChan = cRefChan[iIF]; |
---|
1581 | |
---|
1582 | // Allocate data storage. |
---|
1583 | int nChan = abs(endChan - startChan) + 1; |
---|
1584 | int nPol = cNPol[iIF]; |
---|
1585 | |
---|
1586 | if ( cData[STOKES].colnum > 0 ) |
---|
1587 | nPol = 1 ; |
---|
1588 | |
---|
1589 | if (cGetSpectra || cGetXPol) { |
---|
1590 | int nxpol = cGetXPol ? 2*nChan : 0; |
---|
1591 | mbrec.allocate(0, nChan*nPol, nxpol); |
---|
1592 | } |
---|
1593 | |
---|
1594 | mbrec.nIF = 1; |
---|
1595 | mbrec.IFno[0] = iIF + 1; |
---|
1596 | mbrec.nChan[0] = nChan; |
---|
1597 | mbrec.nPol[0] = nPol; |
---|
1598 | mbrec.polNo = iPol ; |
---|
1599 | |
---|
1600 | readData(FqRefPix, cRow, mbrec.fqRefPix); |
---|
1601 | readData(FqRefVal, cRow, mbrec.fqRefVal); |
---|
1602 | readData(FqDelt, cRow, mbrec.fqDelt); |
---|
1603 | |
---|
1604 | if (cALFA_BD) { |
---|
1605 | unsigned char invert; |
---|
1606 | int anynul, colnum; |
---|
1607 | findCol((char *)"UPPERSB", &colnum); |
---|
1608 | fits_read_col(cSDptr, TBYTE, colnum, cRow, 1, 1, 0, &invert, &anynul, |
---|
1609 | &cStatus); |
---|
1610 | |
---|
1611 | if (invert) { |
---|
1612 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1613 | } |
---|
1614 | } |
---|
1615 | |
---|
1616 | if (cStatus) { |
---|
1617 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1618 | return 1; |
---|
1619 | } |
---|
1620 | |
---|
1621 | // Adjust for channel selection. |
---|
1622 | if (mbrec.fqRefPix[0] != refChan) { |
---|
1623 | mbrec.fqRefVal[0] += (refChan - mbrec.fqRefPix[0]) * mbrec.fqDelt[0]; |
---|
1624 | mbrec.fqRefPix[0] = refChan; |
---|
1625 | } |
---|
1626 | |
---|
1627 | if (endChan < startChan) { |
---|
1628 | mbrec.fqDelt[0] = -mbrec.fqDelt[0]; |
---|
1629 | } |
---|
1630 | |
---|
1631 | // The data may only have a scalar Tsys value. |
---|
1632 | mbrec.tsys[0][0] = 0.0f; |
---|
1633 | mbrec.tsys[0][1] = 0.0f; |
---|
1634 | if (cData[TSYS].nelem >= nPol) { |
---|
1635 | readData(TSYS, cRow, mbrec.tsys[0]); |
---|
1636 | } |
---|
1637 | |
---|
1638 | for (int j = 0; j < 2; j++) { |
---|
1639 | mbrec.calfctr[0][j] = 0.0f; |
---|
1640 | } |
---|
1641 | if (cData[CALFCTR].colnum > 0) { |
---|
1642 | readData(CALFCTR, cRow, mbrec.calfctr); |
---|
1643 | } |
---|
1644 | |
---|
1645 | if (cHaveBase) { |
---|
1646 | mbrec.haveBase = 1; |
---|
1647 | readData(BASELIN, cRow, mbrec.baseLin); |
---|
1648 | readData(BASESUB, cRow, mbrec.baseSub); |
---|
1649 | } else { |
---|
1650 | mbrec.haveBase = 0; |
---|
1651 | } |
---|
1652 | |
---|
1653 | if (cStatus) { |
---|
1654 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1655 | return 1; |
---|
1656 | } |
---|
1657 | |
---|
1658 | // Read data, sectioning and transposing it in the process. |
---|
1659 | long *blc = new long[cNAxes+1]; |
---|
1660 | long *trc = new long[cNAxes+1]; |
---|
1661 | long *inc = new long[cNAxes+1]; |
---|
1662 | for (int iaxis = 0; iaxis <= cNAxes; iaxis++) { |
---|
1663 | blc[iaxis] = 1; |
---|
1664 | trc[iaxis] = 1; |
---|
1665 | inc[iaxis] = 1; |
---|
1666 | } |
---|
1667 | |
---|
1668 | blc[cFreqAxis] = std::min(startChan, endChan); |
---|
1669 | trc[cFreqAxis] = std::max(startChan, endChan); |
---|
1670 | if (cTimeAxis >= 0) { |
---|
1671 | blc[cTimeAxis] = cTimeIdx; |
---|
1672 | trc[cTimeAxis] = cTimeIdx; |
---|
1673 | } |
---|
1674 | blc[cNAxes] = cRow; |
---|
1675 | trc[cNAxes] = cRow; |
---|
1676 | |
---|
1677 | mbrec.haveSpectra = cGetSpectra; |
---|
1678 | if (cGetSpectra) { |
---|
1679 | int anynul; |
---|
1680 | |
---|
1681 | for (int iPol = 0; iPol < nPol; iPol++) { |
---|
1682 | blc[cStokesAxis] = iPol+1; |
---|
1683 | trc[cStokesAxis] = iPol+1; |
---|
1684 | |
---|
1685 | if (cALFA && cALFA_CIMA < 2) { |
---|
1686 | // ALFA data: polarizations are stored in successive rows. |
---|
1687 | blc[cStokesAxis] = 1; |
---|
1688 | trc[cStokesAxis] = 1; |
---|
1689 | |
---|
1690 | if (iPol) { |
---|
1691 | if (++cRow > cNRow) { |
---|
1692 | return -1; |
---|
1693 | } |
---|
1694 | |
---|
1695 | blc[cNAxes] = cRow; |
---|
1696 | trc[cNAxes] = cRow; |
---|
1697 | } |
---|
1698 | |
---|
1699 | } else if (cData[DATA].nelem < 0) { |
---|
1700 | // Variable dimension array; get axis lengths. |
---|
1701 | int naxes = 5, status; |
---|
1702 | |
---|
1703 | if ((status = readDim(DATA, cRow, &naxes, cNAxis))) { |
---|
1704 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1705 | |
---|
1706 | } else if ((status = (naxes != cNAxes))) { |
---|
1707 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE, "DATA array dimensions changed."); |
---|
1708 | } |
---|
1709 | |
---|
1710 | if (status) { |
---|
1711 | delete [] blc; |
---|
1712 | delete [] trc; |
---|
1713 | delete [] inc; |
---|
1714 | return 1; |
---|
1715 | } |
---|
1716 | } |
---|
1717 | |
---|
1718 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxes, cNAxis, |
---|
1719 | blc, trc, inc, 0, mbrec.spectra[0] + iPol*nChan, &anynul, |
---|
1720 | &cStatus)) { |
---|
1721 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1722 | delete [] blc; |
---|
1723 | delete [] trc; |
---|
1724 | delete [] inc; |
---|
1725 | return 1; |
---|
1726 | } |
---|
1727 | |
---|
1728 | if (endChan < startChan) { |
---|
1729 | // Reverse the spectrum. |
---|
1730 | float *iptr = mbrec.spectra[0] + iPol*nChan; |
---|
1731 | float *jptr = iptr + nChan - 1; |
---|
1732 | float *mid = iptr + nChan/2; |
---|
1733 | while (iptr < mid) { |
---|
1734 | float tmp = *iptr; |
---|
1735 | *(iptr++) = *jptr; |
---|
1736 | *(jptr--) = tmp; |
---|
1737 | } |
---|
1738 | } |
---|
1739 | |
---|
1740 | if (cALFA) { |
---|
1741 | // ALFA data, rescale the spectrum. |
---|
1742 | float el, zd; |
---|
1743 | readData(ELEVATIO, cRow, &el); |
---|
1744 | zd = 90.0f - el; |
---|
1745 | |
---|
1746 | float factor = sALFAcal[iBeam][iPol] / alfaGain(zd); |
---|
1747 | |
---|
1748 | if (cALFA_CIMA > 1) { |
---|
1749 | // Rescale according to the number of unblanked accumulations. |
---|
1750 | int colnum, naccum; |
---|
1751 | findCol((char *)"STAT", &colnum); |
---|
1752 | fits_read_col(cSDptr, TINT, colnum, cRow, 10*(cTimeIdx-1)+2, 1, 0, |
---|
1753 | &naccum, &anynul, &cStatus); |
---|
1754 | factor *= cALFAacc / naccum; |
---|
1755 | } |
---|
1756 | |
---|
1757 | float *chan = mbrec.spectra[0] + iPol*nChan; |
---|
1758 | float *chanN = chan + nChan; |
---|
1759 | while (chan < chanN) { |
---|
1760 | // Approximate conversion to Jy. |
---|
1761 | *(chan++) *= factor; |
---|
1762 | } |
---|
1763 | } |
---|
1764 | |
---|
1765 | if (mbrec.tsys[0][iPol] == 0.0) { |
---|
1766 | // Compute Tsys as the average across the spectrum. |
---|
1767 | float *chan = mbrec.spectra[0] + iPol*nChan; |
---|
1768 | float *chanN = chan + nChan; |
---|
1769 | float *tsys = mbrec.tsys[0] + iPol; |
---|
1770 | while (chan < chanN) { |
---|
1771 | *tsys += *(chan++); |
---|
1772 | } |
---|
1773 | |
---|
1774 | *tsys /= nChan; |
---|
1775 | } |
---|
1776 | |
---|
1777 | // Read data flags. |
---|
1778 | if (cData[FLAGGED].colnum > 0) { |
---|
1779 | if (fits_read_subset_byt(cSDptr, cData[FLAGGED].colnum, cNAxes, |
---|
1780 | cNAxis, blc, trc, inc, 0, mbrec.flagged[0] + iPol*nChan, &anynul, |
---|
1781 | &cStatus)) { |
---|
1782 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1783 | delete [] blc; |
---|
1784 | delete [] trc; |
---|
1785 | delete [] inc; |
---|
1786 | return 1; |
---|
1787 | } |
---|
1788 | |
---|
1789 | if (endChan < startChan) { |
---|
1790 | // Reverse the flag vector. |
---|
1791 | unsigned char *iptr = mbrec.flagged[0] + iPol*nChan; |
---|
1792 | unsigned char *jptr = iptr + nChan - 1; |
---|
1793 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1794 | unsigned char tmp = *iptr; |
---|
1795 | *(iptr++) = *jptr; |
---|
1796 | *(jptr--) = tmp; |
---|
1797 | } |
---|
1798 | } |
---|
1799 | |
---|
1800 | } else { |
---|
1801 | // All channels are unflagged by default. |
---|
1802 | unsigned char *iptr = mbrec.flagged[0] + iPol*nChan; |
---|
1803 | for (int ichan = 0; ichan < nChan; ichan++) { |
---|
1804 | *(iptr++) = 0; |
---|
1805 | } |
---|
1806 | } |
---|
1807 | } |
---|
1808 | } |
---|
1809 | |
---|
1810 | |
---|
1811 | // Read cross-polarization data. |
---|
1812 | if (cGetXPol) { |
---|
1813 | int anynul; |
---|
1814 | for (int j = 0; j < 2; j++) { |
---|
1815 | mbrec.xcalfctr[0][j] = 0.0f; |
---|
1816 | } |
---|
1817 | if (cData[XCALFCTR].colnum > 0) { |
---|
1818 | readData(XCALFCTR, cRow, mbrec.xcalfctr); |
---|
1819 | } |
---|
1820 | |
---|
1821 | blc[0] = 1; |
---|
1822 | trc[0] = 2; |
---|
1823 | blc[1] = std::min(startChan, endChan); |
---|
1824 | trc[1] = std::max(startChan, endChan); |
---|
1825 | blc[2] = cRow; |
---|
1826 | trc[2] = cRow; |
---|
1827 | |
---|
1828 | int nAxis = 2; |
---|
1829 | long nAxes[] = {2, nChan}; |
---|
1830 | |
---|
1831 | if (fits_read_subset_flt(cSDptr, cData[XPOLDATA].colnum, nAxis, nAxes, |
---|
1832 | blc, trc, inc, 0, mbrec.xpol[0], &anynul, &cStatus)) { |
---|
1833 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1834 | delete [] blc; |
---|
1835 | delete [] trc; |
---|
1836 | delete [] inc; |
---|
1837 | return 1; |
---|
1838 | } |
---|
1839 | |
---|
1840 | if (endChan < startChan) { |
---|
1841 | // Invert the cross-polarization spectrum. |
---|
1842 | float *iptr = mbrec.xpol[0]; |
---|
1843 | float *jptr = iptr + nChan - 2; |
---|
1844 | for (int ichan = 0; ichan < nChan/2; ichan++) { |
---|
1845 | float tmp = *iptr; |
---|
1846 | *iptr = *jptr; |
---|
1847 | *jptr = tmp; |
---|
1848 | |
---|
1849 | tmp = *(iptr+1); |
---|
1850 | *(iptr+1) = *(jptr+1); |
---|
1851 | *(jptr+1) = tmp; |
---|
1852 | |
---|
1853 | iptr += 2; |
---|
1854 | jptr -= 2; |
---|
1855 | } |
---|
1856 | } |
---|
1857 | } |
---|
1858 | |
---|
1859 | delete [] blc; |
---|
1860 | delete [] trc; |
---|
1861 | delete [] inc; |
---|
1862 | |
---|
1863 | if (cStatus) { |
---|
1864 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1865 | return 1; |
---|
1866 | } |
---|
1867 | |
---|
1868 | mbrec.extraSysCal = cExtraSysCal; |
---|
1869 | readData(REFBEAM, cRow, &mbrec.refBeam); |
---|
1870 | readData(TCAL, cRow, &mbrec.tcal[0]); |
---|
1871 | readData(TCALTIME, cRow, mbrec.tcalTime); |
---|
1872 | |
---|
1873 | readData(AZIMUTH, cRow, &mbrec.azimuth); |
---|
1874 | readData(ELEVATIO, cRow, &mbrec.elevation); |
---|
1875 | readData(PARANGLE, cRow, &mbrec.parAngle); |
---|
1876 | |
---|
1877 | readData(FOCUSAXI, cRow, &mbrec.focusAxi); |
---|
1878 | readData(FOCUSTAN, cRow, &mbrec.focusTan); |
---|
1879 | readData(FOCUSROT, cRow, &mbrec.focusRot); |
---|
1880 | |
---|
1881 | readData(TAMBIENT, cRow, &mbrec.temp); |
---|
1882 | readData(PRESSURE, cRow, &mbrec.pressure); |
---|
1883 | readData(HUMIDITY, cRow, &mbrec.humidity); |
---|
1884 | readData(WINDSPEE, cRow, &mbrec.windSpeed); |
---|
1885 | readData(WINDDIRE, cRow, &mbrec.windAz); |
---|
1886 | |
---|
1887 | if (cALFA_BD) { |
---|
1888 | // ALFA BDFITS stores zenith angle rather than elevation. |
---|
1889 | mbrec.elevation = 90.0 - mbrec.elevation; |
---|
1890 | } |
---|
1891 | |
---|
1892 | mbrec.azimuth *= D2R; |
---|
1893 | mbrec.elevation *= D2R; |
---|
1894 | mbrec.parAngle *= D2R; |
---|
1895 | mbrec.focusRot *= D2R; |
---|
1896 | mbrec.windAz *= D2R; |
---|
1897 | |
---|
1898 | // For GBT data, source velocity can be evaluated |
---|
1899 | if ( cData[RVSYS].colnum > 0 && cData[VFRAME].colnum > 0 ) { |
---|
1900 | float vframe; |
---|
1901 | readData(VFRAME, cRow, &vframe); |
---|
1902 | float rvsys; |
---|
1903 | readData(RVSYS, cRow, &rvsys); |
---|
1904 | //mbrec.srcVelocity = rvsys - vframe ; |
---|
1905 | mbrec.srcVelocity = rvsys ; |
---|
1906 | } |
---|
1907 | |
---|
1908 | if (cStatus) { |
---|
1909 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
1910 | return 1; |
---|
1911 | } |
---|
1912 | |
---|
1913 | return 0; |
---|
1914 | } |
---|
1915 | |
---|
1916 | //-------------------------------------------------------- SDFITSreader::close |
---|
1917 | |
---|
1918 | // Close the SDFITS file. |
---|
1919 | |
---|
1920 | void SDFITSreader::close() |
---|
1921 | { |
---|
1922 | if (cSDptr) { |
---|
1923 | int status = 0; |
---|
1924 | fits_close_file(cSDptr, &status); |
---|
1925 | cSDptr = 0x0; |
---|
1926 | |
---|
1927 | if (cBeams) delete [] cBeams; |
---|
1928 | if (cIFs) delete [] cIFs; |
---|
1929 | if (cStartChan) delete [] cStartChan; |
---|
1930 | if (cEndChan) delete [] cEndChan; |
---|
1931 | if (cRefChan) delete [] cRefChan; |
---|
1932 | } |
---|
1933 | } |
---|
1934 | |
---|
1935 | //------------------------------------------------------- SDFITSreader::log |
---|
1936 | |
---|
1937 | // Log a message. If the current CFITSIO status value is non-zero, also log |
---|
1938 | // the corresponding error message and the CFITSIO message stack. |
---|
1939 | |
---|
1940 | void SDFITSreader::log(LogOrigin origin, LogIO::Command cmd, const char *msg) |
---|
1941 | { |
---|
1942 | LogIO os( origin ) ; |
---|
1943 | |
---|
1944 | os << msg << endl ; |
---|
1945 | |
---|
1946 | if (cStatus > 0) { |
---|
1947 | fits_get_errstatus(cStatus, cMsg); |
---|
1948 | os << cMsg << endl ; |
---|
1949 | |
---|
1950 | while (fits_read_errmsg(cMsg)) { |
---|
1951 | os << cMsg << endl ; |
---|
1952 | } |
---|
1953 | } |
---|
1954 | os << LogIO::POST ; |
---|
1955 | } |
---|
1956 | |
---|
1957 | //----------------------------------------------------- SDFITSreader::findData |
---|
1958 | |
---|
1959 | // Locate a data item in the SDFITS file. |
---|
1960 | |
---|
1961 | void SDFITSreader::findData( |
---|
1962 | int iData, |
---|
1963 | char *name, |
---|
1964 | int type) |
---|
1965 | { |
---|
1966 | cData[iData].name = name; |
---|
1967 | cData[iData].type = type; |
---|
1968 | |
---|
1969 | int colnum; |
---|
1970 | findCol(name, &colnum); |
---|
1971 | cData[iData].colnum = colnum; |
---|
1972 | |
---|
1973 | // Determine the number of data elements. |
---|
1974 | if (colnum > 0) { |
---|
1975 | int coltype; |
---|
1976 | long nelem, width; |
---|
1977 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
1978 | fits_get_bcolparms(cSDptr, colnum, 0x0, cData[iData].units, 0x0, 0x0, 0x0, |
---|
1979 | 0x0, 0x0, 0x0, &cStatus); |
---|
1980 | |
---|
1981 | // Look for a TDIMnnn keyword or column. |
---|
1982 | char tdim[8]; |
---|
1983 | sprintf(tdim, "TDIM%d", colnum); |
---|
1984 | findCol(tdim, &cData[iData].tdimcol); |
---|
1985 | |
---|
1986 | if (coltype < 0) { |
---|
1987 | // CFITSIO returns coltype < 0 for variable length arrays. |
---|
1988 | cData[iData].coltype = -coltype; |
---|
1989 | cData[iData].nelem = -nelem; |
---|
1990 | |
---|
1991 | } else { |
---|
1992 | cData[iData].coltype = coltype; |
---|
1993 | |
---|
1994 | // Is there a TDIMnnn column? |
---|
1995 | if (cData[iData].tdimcol > 0) { |
---|
1996 | // Yes, dimensions of the fixed-length array could still vary. |
---|
1997 | cData[iData].nelem = -nelem; |
---|
1998 | } else { |
---|
1999 | cData[iData].nelem = nelem; |
---|
2000 | } |
---|
2001 | } |
---|
2002 | |
---|
2003 | } else if (colnum == 0) { |
---|
2004 | // Keyword. |
---|
2005 | cData[iData].coltype = 0; |
---|
2006 | cData[iData].nelem = 1; |
---|
2007 | cData[iData].tdimcol = -1; |
---|
2008 | } |
---|
2009 | } |
---|
2010 | |
---|
2011 | //------------------------------------------------------ SDFITSreader::findCol |
---|
2012 | |
---|
2013 | // Locate a parameter in the SDFITS file. |
---|
2014 | |
---|
2015 | void SDFITSreader::findCol( |
---|
2016 | char *name, |
---|
2017 | int *colnum) |
---|
2018 | { |
---|
2019 | *colnum = 0; |
---|
2020 | int status = 0; |
---|
2021 | fits_get_colnum(cSDptr, CASESEN, name, colnum, &status); |
---|
2022 | |
---|
2023 | if (status) { |
---|
2024 | // Not a real column - maybe it's virtual. |
---|
2025 | char card[81]; |
---|
2026 | |
---|
2027 | status = 0; |
---|
2028 | fits_read_card(cSDptr, name, card, &status); |
---|
2029 | if (status) { |
---|
2030 | // Not virtual either. |
---|
2031 | *colnum = -1; |
---|
2032 | } |
---|
2033 | |
---|
2034 | // Clear error messages. |
---|
2035 | fits_clear_errmsg(); |
---|
2036 | } |
---|
2037 | } |
---|
2038 | |
---|
2039 | //------------------------------------------------------ SDFITSreader::readDim |
---|
2040 | |
---|
2041 | // Determine the dimensions of an array in the SDFITS file. |
---|
2042 | |
---|
2043 | int SDFITSreader::readDim( |
---|
2044 | int iData, |
---|
2045 | long iRow, |
---|
2046 | int *naxes, |
---|
2047 | long naxis[]) |
---|
2048 | { |
---|
2049 | int colnum = cData[iData].colnum; |
---|
2050 | if (colnum <= 0) { |
---|
2051 | return 1; |
---|
2052 | } |
---|
2053 | |
---|
2054 | int maxdim = *naxes; |
---|
2055 | if (cData[iData].tdimcol < 0) { |
---|
2056 | // No TDIMnnn column for this array. |
---|
2057 | if (cData[iData].nelem < 0) { |
---|
2058 | // Variable length array; read the array descriptor. |
---|
2059 | *naxes = 1; |
---|
2060 | long dummy; |
---|
2061 | if (fits_read_descript(cSDptr, colnum, iRow, naxis, &dummy, &cStatus)) { |
---|
2062 | return 1; |
---|
2063 | } |
---|
2064 | |
---|
2065 | } else { |
---|
2066 | // Read the repeat count from TFORMnnn. |
---|
2067 | if (fits_read_tdim(cSDptr, colnum, maxdim, naxes, naxis, &cStatus)) { |
---|
2068 | return 1; |
---|
2069 | } |
---|
2070 | } |
---|
2071 | |
---|
2072 | } else { |
---|
2073 | // Read the TDIMnnn value from the header or table. |
---|
2074 | char tdim[8], tdimval[64]; |
---|
2075 | sprintf(tdim, "TDIM%d", colnum); |
---|
2076 | readData(tdim, TSTRING, iRow, tdimval); |
---|
2077 | |
---|
2078 | // fits_decode_tdim() checks that the TDIMnnn value is within the length |
---|
2079 | // of the array in the specified column number but unfortunately doesn't |
---|
2080 | // recognize variable-length arrays. Hence we must decode it here. |
---|
2081 | char *tp = tdimval; |
---|
2082 | if (*tp != '(') return 1; |
---|
2083 | |
---|
2084 | tp++; |
---|
2085 | *naxes = 0; |
---|
2086 | for (size_t j = 1; j < strlen(tdimval); j++) { |
---|
2087 | if (tdimval[j] == ',' || tdimval[j] == ')') { |
---|
2088 | sscanf(tp, "%ld", naxis + (*naxes)++); |
---|
2089 | if (tdimval[j] == ')') break; |
---|
2090 | tp = tdimval + j + 1; |
---|
2091 | } |
---|
2092 | } |
---|
2093 | } |
---|
2094 | |
---|
2095 | return 0; |
---|
2096 | } |
---|
2097 | |
---|
2098 | //----------------------------------------------------- SDFITSreader::readParm |
---|
2099 | |
---|
2100 | // Read a parameter value from the SDFITS file. |
---|
2101 | |
---|
2102 | int SDFITSreader::readParm( |
---|
2103 | char *name, |
---|
2104 | int type, |
---|
2105 | void *value) |
---|
2106 | { |
---|
2107 | return readData(name, type, 1, value); |
---|
2108 | } |
---|
2109 | |
---|
2110 | //----------------------------------------------------- SDFITSreader::readData |
---|
2111 | |
---|
2112 | // Read a data value from the SDFITS file. |
---|
2113 | |
---|
2114 | int SDFITSreader::readData( |
---|
2115 | char *name, |
---|
2116 | int type, |
---|
2117 | long iRow, |
---|
2118 | void *value) |
---|
2119 | { |
---|
2120 | int colnum; |
---|
2121 | findCol(name, &colnum); |
---|
2122 | |
---|
2123 | if (colnum > 0 && iRow > 0) { |
---|
2124 | // Read the first value from the specified row of the table. |
---|
2125 | int coltype; |
---|
2126 | long nelem, width; |
---|
2127 | fits_get_coltype(cSDptr, colnum, &coltype, &nelem, &width, &cStatus); |
---|
2128 | |
---|
2129 | int anynul; |
---|
2130 | if (type == TSTRING) { |
---|
2131 | if (nelem) { |
---|
2132 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
2133 | &cStatus); |
---|
2134 | } else { |
---|
2135 | strcpy((char *)value, ""); |
---|
2136 | } |
---|
2137 | |
---|
2138 | } else { |
---|
2139 | if (nelem) { |
---|
2140 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, value, &anynul, |
---|
2141 | &cStatus); |
---|
2142 | } else { |
---|
2143 | if (type == TSHORT) { |
---|
2144 | *((short *)value) = 0; |
---|
2145 | } else if (type == TINT) { |
---|
2146 | *((int *)value) = 0; |
---|
2147 | } else if (type == TFLOAT) { |
---|
2148 | *((float *)value) = 0.0f; |
---|
2149 | } else if (type == TDOUBLE) { |
---|
2150 | *((double *)value) = 0.0; |
---|
2151 | } |
---|
2152 | } |
---|
2153 | } |
---|
2154 | |
---|
2155 | } else if (colnum == 0) { |
---|
2156 | // Read keyword value. |
---|
2157 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
2158 | |
---|
2159 | } else { |
---|
2160 | // Not present. |
---|
2161 | if (type == TSTRING) { |
---|
2162 | strcpy((char *)value, ""); |
---|
2163 | } else if (type == TSHORT) { |
---|
2164 | *((short *)value) = 0; |
---|
2165 | } else if (type == TINT) { |
---|
2166 | *((int *)value) = 0; |
---|
2167 | } else if (type == TFLOAT) { |
---|
2168 | *((float *)value) = 0.0f; |
---|
2169 | } else if (type == TDOUBLE) { |
---|
2170 | *((double *)value) = 0.0; |
---|
2171 | } |
---|
2172 | } |
---|
2173 | |
---|
2174 | return colnum < 0; |
---|
2175 | } |
---|
2176 | |
---|
2177 | //----------------------------------------------------- SDFITSreader::readData |
---|
2178 | |
---|
2179 | // Read data from the SDFITS file. |
---|
2180 | |
---|
2181 | int SDFITSreader::readData( |
---|
2182 | int iData, |
---|
2183 | long iRow, |
---|
2184 | void *value) |
---|
2185 | { |
---|
2186 | int type = cData[iData].type; |
---|
2187 | int colnum = cData[iData].colnum; |
---|
2188 | |
---|
2189 | if (colnum > 0 && iRow > 0) { |
---|
2190 | // Read the required number of values from the specified row of the table. |
---|
2191 | long nelem = cData[iData].nelem; |
---|
2192 | int anynul; |
---|
2193 | if (type == TSTRING) { |
---|
2194 | if (nelem) { |
---|
2195 | fits_read_col(cSDptr, type, colnum, iRow, 1, 1, 0, &value, &anynul, |
---|
2196 | &cStatus); |
---|
2197 | } else { |
---|
2198 | strcpy((char *)value, ""); |
---|
2199 | } |
---|
2200 | |
---|
2201 | } else { |
---|
2202 | if (nelem) { |
---|
2203 | fits_read_col(cSDptr, type, colnum, iRow, 1, abs(nelem), 0, value, |
---|
2204 | &anynul, &cStatus); |
---|
2205 | } else { |
---|
2206 | if (type == TSHORT) { |
---|
2207 | *((short *)value) = 0; |
---|
2208 | } else if (type == TINT) { |
---|
2209 | *((int *)value) = 0; |
---|
2210 | } else if (type == TFLOAT) { |
---|
2211 | *((float *)value) = 0.0f; |
---|
2212 | } else if (type == TDOUBLE) { |
---|
2213 | *((double *)value) = 0.0; |
---|
2214 | } |
---|
2215 | } |
---|
2216 | } |
---|
2217 | |
---|
2218 | } else if (colnum == 0) { |
---|
2219 | // Read keyword value. |
---|
2220 | char *name = cData[iData].name; |
---|
2221 | fits_read_key(cSDptr, type, name, value, 0, &cStatus); |
---|
2222 | |
---|
2223 | } else { |
---|
2224 | // Not present. |
---|
2225 | if (type == TSTRING) { |
---|
2226 | strcpy((char *)value, ""); |
---|
2227 | } else if (type == TSHORT) { |
---|
2228 | *((short *)value) = 0; |
---|
2229 | } else if (type == TINT) { |
---|
2230 | *((int *)value) = 0; |
---|
2231 | } else if (type == TFLOAT) { |
---|
2232 | *((float *)value) = 0.0f; |
---|
2233 | } else if (type == TDOUBLE) { |
---|
2234 | *((double *)value) = 0.0; |
---|
2235 | } |
---|
2236 | } |
---|
2237 | |
---|
2238 | return colnum < 0; |
---|
2239 | } |
---|
2240 | |
---|
2241 | //------------------------------------------------------ SDFITSreader::readCol |
---|
2242 | |
---|
2243 | // Read a scalar column from the SDFITS file. |
---|
2244 | |
---|
2245 | int SDFITSreader::readCol( |
---|
2246 | int iData, |
---|
2247 | void *value) |
---|
2248 | { |
---|
2249 | int type = cData[iData].type; |
---|
2250 | |
---|
2251 | if (cData[iData].colnum > 0) { |
---|
2252 | // Table column. |
---|
2253 | int anynul; |
---|
2254 | fits_read_col(cSDptr, type, cData[iData].colnum, 1, 1, cNRow, 0, |
---|
2255 | value, &anynul, &cStatus); |
---|
2256 | |
---|
2257 | } else { |
---|
2258 | // Header keyword. |
---|
2259 | readData(iData, 0, value); |
---|
2260 | for (int irow = 1; irow < cNRow; irow++) { |
---|
2261 | if (type == TSHORT) { |
---|
2262 | ((short *)value)[irow] = *((short *)value); |
---|
2263 | } else if (type == TINT) { |
---|
2264 | ((int *)value)[irow] = *((int *)value); |
---|
2265 | } else if (type == TFLOAT) { |
---|
2266 | ((float *)value)[irow] = *((float *)value); |
---|
2267 | } else if (type == TDOUBLE) { |
---|
2268 | ((double *)value)[irow] = *((double *)value); |
---|
2269 | } |
---|
2270 | } |
---|
2271 | } |
---|
2272 | |
---|
2273 | return cData[iData].colnum < 0; |
---|
2274 | } |
---|
2275 | |
---|
2276 | //----------------------------------------------------- SDFITSreader::readTime |
---|
2277 | |
---|
2278 | // Read the time from the SDFITS file. |
---|
2279 | |
---|
2280 | int SDFITSreader::readTime( |
---|
2281 | long iRow, |
---|
2282 | int iPix, |
---|
2283 | char *datobs, |
---|
2284 | double &utc) |
---|
2285 | { |
---|
2286 | readData(DATE_OBS, iRow, datobs); |
---|
2287 | if (cData[TIME].colnum >= 0) { |
---|
2288 | readData(TIME, iRow, &utc); |
---|
2289 | } else if (cGBT) { |
---|
2290 | Int yy, mm ; |
---|
2291 | Double dd, hour, min, sec ; |
---|
2292 | sscanf( datobs, "%d-%d-%lfT%lf:%lf:%lf", &yy, &mm, &dd, &hour, &min, &sec ) ; |
---|
2293 | dd = dd + ( hour * 3600.0 + min * 60.0 + sec ) / 86400.0 ; |
---|
2294 | MVTime mvt( yy, mm, dd ) ; |
---|
2295 | dd = mvt.day() ; |
---|
2296 | utc = fmod( dd, 1.0 ) * 86400.0 ; |
---|
2297 | } else if (cNAxisTime > 1) { |
---|
2298 | double timeDelt, timeRefPix, timeRefVal; |
---|
2299 | readData(TimeRefVal, iRow, &timeRefVal); |
---|
2300 | readData(TimeDelt, iRow, &timeDelt); |
---|
2301 | readData(TimeRefPix, iRow, &timeRefPix); |
---|
2302 | utc = timeRefVal + (iPix - timeRefPix) * timeDelt; |
---|
2303 | } |
---|
2304 | |
---|
2305 | if (cALFA_BD) utc *= 3600.0; |
---|
2306 | |
---|
2307 | // Check DATE-OBS format. |
---|
2308 | if (datobs[2] == '/') { |
---|
2309 | // Translate an old-format DATE-OBS. |
---|
2310 | datobs[9] = datobs[1]; |
---|
2311 | datobs[8] = datobs[0]; |
---|
2312 | datobs[2] = datobs[6]; |
---|
2313 | datobs[5] = datobs[3]; |
---|
2314 | datobs[3] = datobs[7]; |
---|
2315 | datobs[6] = datobs[4]; |
---|
2316 | datobs[7] = '-'; |
---|
2317 | datobs[4] = '-'; |
---|
2318 | datobs[1] = '9'; |
---|
2319 | datobs[0] = '1'; |
---|
2320 | |
---|
2321 | } else if (datobs[10] == 'T' && cData[TIME].colnum < 0) { |
---|
2322 | // Dig UTC out of a new-format DATE-OBS. |
---|
2323 | int hh, mm; |
---|
2324 | float ss; |
---|
2325 | sscanf(datobs+11, "%d:%d:%f", &hh, &mm, &ss); |
---|
2326 | utc = (hh*60 + mm)*60 + ss; |
---|
2327 | } |
---|
2328 | |
---|
2329 | datobs[10] = '\0'; |
---|
2330 | |
---|
2331 | return 0; |
---|
2332 | } |
---|
2333 | |
---|
2334 | //------------------------------------------------------ SDFITSreader::alfaCal |
---|
2335 | |
---|
2336 | // Process ALFA calibration data. |
---|
2337 | |
---|
2338 | int SDFITSreader::alfaCal( |
---|
2339 | short iBeam, |
---|
2340 | short iIF, |
---|
2341 | short iPol) |
---|
2342 | { |
---|
2343 | const string methodName = "alfaCal()" ; |
---|
2344 | |
---|
2345 | int calOn; |
---|
2346 | char chars[32]; |
---|
2347 | if (cALFA_BD) { |
---|
2348 | readData((char *)"OBS_NAME", TSTRING, cRow, chars); |
---|
2349 | } else { |
---|
2350 | readData((char *)"SCANTYPE", TSTRING, cRow, chars); |
---|
2351 | } |
---|
2352 | |
---|
2353 | if (strcmp(chars, "ON") == 0) { |
---|
2354 | calOn = 1; |
---|
2355 | } else if (strcmp(chars, "OFF") == 0) { |
---|
2356 | calOn = 0; |
---|
2357 | } else { |
---|
2358 | return 1; |
---|
2359 | } |
---|
2360 | |
---|
2361 | // Read cal data. |
---|
2362 | long *blc = new long[cNAxes+1]; |
---|
2363 | long *trc = new long[cNAxes+1]; |
---|
2364 | long *inc = new long[cNAxes+1]; |
---|
2365 | for (int iaxis = 0; iaxis <= cNAxes; iaxis++) { |
---|
2366 | blc[iaxis] = 1; |
---|
2367 | trc[iaxis] = 1; |
---|
2368 | inc[iaxis] = 1; |
---|
2369 | } |
---|
2370 | |
---|
2371 | // User channel selection. |
---|
2372 | int startChan = cStartChan[iIF]; |
---|
2373 | int endChan = cEndChan[iIF]; |
---|
2374 | |
---|
2375 | blc[cFreqAxis] = std::min(startChan, endChan); |
---|
2376 | trc[cFreqAxis] = std::max(startChan, endChan); |
---|
2377 | if (cALFA_CIMA > 1) { |
---|
2378 | // CIMAFITS 2.x has a legitimate STOKES axis... |
---|
2379 | blc[cStokesAxis] = iPol+1; |
---|
2380 | trc[cStokesAxis] = iPol+1; |
---|
2381 | } else { |
---|
2382 | // ...older ALFA data does not. |
---|
2383 | blc[cStokesAxis] = 1; |
---|
2384 | trc[cStokesAxis] = 1; |
---|
2385 | } |
---|
2386 | if (cTimeAxis >= 0) { |
---|
2387 | blc[cTimeAxis] = cTimeIdx; |
---|
2388 | trc[cTimeAxis] = cTimeIdx; |
---|
2389 | } |
---|
2390 | blc[cNAxes] = cRow; |
---|
2391 | trc[cNAxes] = cRow; |
---|
2392 | |
---|
2393 | float spectrum[endChan]; |
---|
2394 | int anynul; |
---|
2395 | if (fits_read_subset_flt(cSDptr, cData[DATA].colnum, cNAxes, cNAxis, |
---|
2396 | blc, trc, inc, 0, spectrum, &anynul, &cStatus)) { |
---|
2397 | log(LogOrigin( className, methodName, WHERE ), LogIO::SEVERE); |
---|
2398 | delete [] blc; |
---|
2399 | delete [] trc; |
---|
2400 | delete [] inc; |
---|
2401 | return 1; |
---|
2402 | } |
---|
2403 | |
---|
2404 | // Factor to rescale according to the number of unblanked accumulations. |
---|
2405 | float factor = 1.0f; |
---|
2406 | if (cALFA_CIMA > 1) { |
---|
2407 | int colnum, naccum; |
---|
2408 | findCol((char *)"STAT", &colnum); |
---|
2409 | fits_read_col(cSDptr, TINT, colnum, cRow, 2, 1, 0, &naccum, &anynul, |
---|
2410 | &cStatus); |
---|
2411 | factor = cALFAacc / naccum; |
---|
2412 | } |
---|
2413 | |
---|
2414 | // Average the spectrum. |
---|
2415 | float mean = 1e9f; |
---|
2416 | for (int k = 0; k < 2; k++) { |
---|
2417 | float discrim = 2.0f * mean; |
---|
2418 | |
---|
2419 | int nChan = 0; |
---|
2420 | float sum = 0.0f; |
---|
2421 | |
---|
2422 | float *chanN = spectrum + abs(endChan - startChan) + 1; |
---|
2423 | for (float *chan = spectrum; chan < chanN; chan++) { |
---|
2424 | // Simple discriminant that eliminates strong radar interference. |
---|
2425 | if (*chan < discrim) { |
---|
2426 | nChan++; |
---|
2427 | sum += *chan * factor; |
---|
2428 | } |
---|
2429 | } |
---|
2430 | |
---|
2431 | mean = sum / nChan; |
---|
2432 | } |
---|
2433 | |
---|
2434 | if (calOn) { |
---|
2435 | sALFAcalOn[iBeam][iPol] *= sALFAcalNon[iBeam][iPol]; |
---|
2436 | sALFAcalOn[iBeam][iPol] += mean; |
---|
2437 | sALFAcalOn[iBeam][iPol] /= ++sALFAcalNon[iBeam][iPol]; |
---|
2438 | } else { |
---|
2439 | sALFAcalOff[iBeam][iPol] *= sALFAcalNoff[iBeam][iPol]; |
---|
2440 | sALFAcalOff[iBeam][iPol] += mean; |
---|
2441 | sALFAcalOff[iBeam][iPol] /= ++sALFAcalNoff[iBeam][iPol]; |
---|
2442 | } |
---|
2443 | |
---|
2444 | if (sALFAcalNon[iBeam][iPol] && sALFAcalNoff[iBeam][iPol]) { |
---|
2445 | // Tcal should come from the TCAL table, it varies weakly with beam, |
---|
2446 | // polarization, and frequency. However, TCAL is not written properly. |
---|
2447 | float Tcal = 12.0f; |
---|
2448 | sALFAcal[iBeam][iPol] = Tcal / (sALFAcalOn[iBeam][iPol] - |
---|
2449 | sALFAcalOff[iBeam][iPol]); |
---|
2450 | |
---|
2451 | // Scale from K to Jy; the gain also varies weakly with beam, |
---|
2452 | // polarization, frequency, and zenith angle. |
---|
2453 | float fluxCal = 10.0f; |
---|
2454 | sALFAcal[iBeam][iPol] /= fluxCal; |
---|
2455 | } |
---|
2456 | |
---|
2457 | return 0; |
---|
2458 | } |
---|
2459 | |
---|
2460 | //----------------------------------------------------- SDFITSreader::alfaGain |
---|
2461 | |
---|
2462 | // ALFA gain factor. |
---|
2463 | |
---|
2464 | float SDFITSreader::alfaGain( |
---|
2465 | float zd) |
---|
2466 | { |
---|
2467 | // Gain vs zenith distance table from Robert Minchin, 2008/12/08. |
---|
2468 | const int nZD = 37; |
---|
2469 | const float zdLim[] = {1.5f, 19.5f}; |
---|
2470 | const float zdInc = (nZD - 1) / (zdLim[1] - zdLim[0]); |
---|
2471 | float zdGain[] = { 1.00723708, |
---|
2472 | 1.16644573, 1.15003645, 1.07117307, 1.02532673, |
---|
2473 | 1.01788402, 1.01369524, 1.00000000, 0.989855111, |
---|
2474 | 0.990888834, 0.993996620, 0.989964068, 0.982213855, |
---|
2475 | 0.978662670, 0.979349494, 0.978478372, 0.974631131, |
---|
2476 | 0.972126007, 0.972835243, 0.972742677, 0.968671739, |
---|
2477 | 0.963891327, 0.963452935, 0.966831207, 0.969585896, |
---|
2478 | 0.970700860, 0.972644389, 0.973754644, 0.967344403, |
---|
2479 | 0.952168941, 0.937160134, 0.927843094, 0.914048433, |
---|
2480 | 0.886700928, 0.864701211, 0.869126320, 0.854309499}; |
---|
2481 | |
---|
2482 | float gain; |
---|
2483 | // Do table lookup by linear interpolation. |
---|
2484 | float lambda = zdInc * (zd - zdLim[0]); |
---|
2485 | int j = int(lambda); |
---|
2486 | if (j < 0) { |
---|
2487 | gain = zdGain[0]; |
---|
2488 | } else if (j >= nZD-1) { |
---|
2489 | gain = zdGain[nZD-1]; |
---|
2490 | } else { |
---|
2491 | gain = zdGain[j] + (lambda - j) * (zdGain[j+1] - zdGain[j]); |
---|
2492 | } |
---|
2493 | |
---|
2494 | return gain; |
---|
2495 | } |
---|
2496 | |
---|