1 | //#--------------------------------------------------------------------------- |
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2 | //# STAttr.cc: A collection of attributes for different telescopes |
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3 | //#--------------------------------------------------------------------------- |
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4 | //# Copyright (C) 2004 |
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5 | //# ATNF |
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6 | //# |
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7 | //# This program is free software; you can redistribute it and/or modify it |
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8 | //# under the terms of the GNU General Public License as published by the Free |
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9 | //# Software Foundation; either version 2 of the License, or (at your option) |
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10 | //# any later version. |
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11 | //# |
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12 | //# This program is distributed in the hope that it will be useful, but |
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13 | //# WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | //# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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15 | //# Public License for more details. |
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16 | //# |
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17 | //# You should have received a copy of the GNU General Public License along |
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18 | //# with this program; if not, write to the Free Software Foundation, Inc., |
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19 | //# 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
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20 | //# |
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21 | //# Correspondence concerning this software should be addressed as follows: |
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22 | //# Internet email: Malte.Marquarding@csiro.au |
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23 | //# Postal address: Malte Marquarding, |
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24 | //# Australia Telescope National Facility, |
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25 | //# P.O. Box 76, |
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26 | //# Epping, NSW, 2121, |
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27 | //# AUSTRALIA |
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28 | //# |
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29 | //# $Id: |
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30 | //#--------------------------------------------------------------------------- |
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31 | |
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32 | #include <casa/aips.h> |
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33 | #include <casa/Arrays/Vector.h> |
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34 | #include <casa/Arrays/ArrayMath.h> |
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35 | #include <casa/Exceptions.h> |
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36 | #include <casa/Quanta/QC.h> |
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37 | #include <casa/Quanta/Quantum.h> |
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38 | #include <casa/Quanta/MVTime.h> |
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39 | |
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40 | #include <measures/Measures/MEpoch.h> |
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41 | |
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42 | #include <scimath/Mathematics/InterpolateArray1D.h> |
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43 | |
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44 | #include "STAttr.h" |
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45 | |
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46 | using namespace casa; |
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47 | using namespace asap; |
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48 | |
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49 | STAttr::STAttr() |
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50 | { |
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51 | initData(); |
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52 | } |
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53 | |
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54 | STAttr::STAttr(const STAttr& other) |
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55 | { |
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56 | initData(); // state just private 'static' data |
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57 | } |
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58 | |
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59 | STAttr& STAttr::operator=(const STAttr& other) |
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60 | { |
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61 | if (this != &other) { |
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62 | ; // state just private 'static' data |
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63 | } |
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64 | return *this; |
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65 | } |
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66 | |
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67 | STAttr::~STAttr() |
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68 | {;} |
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69 | |
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70 | |
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71 | Float STAttr::diameter(Instrument inst) const |
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72 | { |
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73 | Float D = 1.0; |
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74 | switch (inst) { |
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75 | case ATMOPRA: |
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76 | { |
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77 | D = 22.0; |
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78 | } |
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79 | break; |
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80 | case ATPKSMB: |
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81 | case ATPKSHOH: |
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82 | { |
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83 | D = 64.0; |
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84 | } |
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85 | break; |
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86 | case TIDBINBILLA: |
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87 | { |
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88 | D = 70.0; |
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89 | } |
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90 | break; |
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91 | case CEDUNA: |
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92 | { |
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93 | D = 30.0; |
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94 | } |
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95 | break; |
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96 | case HOBART: |
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97 | { |
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98 | D = 26.0; |
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99 | } |
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100 | break; |
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101 | default: |
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102 | { |
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103 | throw(AipsError("Unknown instrument")); |
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104 | } |
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105 | } |
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106 | return D; |
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107 | } |
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108 | |
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109 | Vector<Float> STAttr::beamEfficiency(Instrument inst, const MEpoch& dateObs, |
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110 | const Vector<Float>& freqs) const |
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111 | { |
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112 | |
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113 | // Look at date where appropriate |
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114 | MVTime t(dateObs.getValue()); |
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115 | uInt year = t.year(); |
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116 | |
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117 | Vector<Float> facs(freqs.nelements(),1.0); |
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118 | switch (inst) { |
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119 | case ATMOPRA: |
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120 | { |
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121 | if (year<2003) { |
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122 | pushLog("There is no beam efficiency data from before 2003" |
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123 | " - using 2003 data"); |
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124 | facs = interp(freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2003Y_); |
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125 | } else if (year==2003) { |
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126 | pushLog("Using beam efficiency data from 2003"); |
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127 | facs = interp(freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2003Y_); |
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128 | } else { |
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129 | pushLog("Using beam efficiency data from 2004"); |
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130 | facs = interp(freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2004Y_); |
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131 | } |
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132 | } |
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133 | break; |
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134 | default: |
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135 | { |
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136 | pushLog("No beam efficiency data for this instrument - assuming unity"); |
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137 | } |
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138 | } |
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139 | return facs; |
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140 | } |
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141 | |
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142 | Vector<Float> STAttr::apertureEfficiency(Instrument inst, |
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143 | const MEpoch& dateObs, |
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144 | const Vector<Float>& freqs) const |
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145 | { |
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146 | |
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147 | // Look at date where appropriate |
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148 | MVTime t(dateObs.getValue()); |
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149 | uInt year = t.year(); |
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150 | |
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151 | Vector<Float> facs(freqs.nelements(),1.0); |
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152 | switch (inst) { |
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153 | case ATMOPRA: |
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154 | { |
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155 | if (year<2004) { |
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156 | pushLog("There is no aperture efficiency data from before 2004" |
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157 | " - using 2004 data"); |
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158 | facs = interp(freqs/1.0e9f, MopEtaApX_, MopEtaAp2004Y_); |
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159 | } else { |
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160 | pushLog("Using aperture efficiency data from 2004"); |
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161 | facs = interp(freqs/1.0e9f, MopEtaApX_, MopEtaAp2004Y_); |
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162 | } |
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163 | } |
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164 | break; |
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165 | case TIDBINBILLA: |
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166 | { |
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167 | facs = interp(freqs/1.0e9f, TidEtaApX_, TidEtaApY_); |
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168 | } |
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169 | break; |
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170 | default: |
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171 | { |
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172 | pushLog("No aperture efficiency data for this instrument" |
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173 | " - assuming unity"); |
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174 | } |
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175 | } |
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176 | return facs; |
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177 | } |
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178 | |
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179 | Vector<Float> STAttr::JyPerK(Instrument inst, const MEpoch& dateObs, |
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180 | const Vector<Float>& freqs) const |
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181 | { |
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182 | |
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183 | // Find what we need |
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184 | Vector<Float> etaAp = apertureEfficiency(inst, dateObs, freqs); |
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185 | Float D = diameter(inst); |
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186 | // Compute it |
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187 | Vector<Float> facs(freqs.nelements(),1.0); |
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188 | for (uInt i=0; i<freqs.nelements(); i++) { |
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189 | facs(i) = STAttr::findJyPerK(etaAp(i), D); |
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190 | } |
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191 | return facs; |
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192 | } |
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193 | |
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194 | |
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195 | Float STAttr::findJyPerK(Float etaAp, Float D) |
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196 | // |
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197 | // Converts K -> Jy |
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198 | // D in m |
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199 | // |
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200 | { |
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201 | Double kb = QC::k.getValue(Unit(String("erg/K"))); |
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202 | Float gA = C::pi * D * D / 4.0; |
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203 | return (2.0 * 1.0e19 * kb / etaAp / gA); |
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204 | } |
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205 | |
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206 | |
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207 | Vector<Float> STAttr::gainElevationPoly(Instrument inst) const |
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208 | { |
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209 | |
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210 | // Look at date where appropriate |
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211 | switch (inst) { |
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212 | case TIDBINBILLA: |
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213 | { |
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214 | return TidGainElPoly_.copy(); |
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215 | } |
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216 | break; |
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217 | default: |
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218 | { |
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219 | Vector<Float> t; |
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220 | return t.copy(); |
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221 | } |
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222 | } |
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223 | } |
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224 | |
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225 | FeedPolType STAttr::feedPolType(Instrument inst) const |
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226 | { |
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227 | FeedPolType type = UNKNOWNFEED; |
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228 | switch (inst) { |
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229 | case ATMOPRA: |
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230 | case ATPKSMB: |
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231 | case ATPKSHOH: |
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232 | { |
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233 | type = LINEAR; |
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234 | } |
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235 | break; |
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236 | case TIDBINBILLA: |
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237 | { |
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238 | type = CIRCULAR; |
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239 | } |
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240 | break; |
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241 | default: |
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242 | { |
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243 | type = UNKNOWNFEED; |
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244 | } |
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245 | } |
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246 | return type; |
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247 | } |
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248 | |
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249 | |
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250 | // Private |
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251 | Vector<Float> STAttr::interp(const Vector<Float>& xOut, |
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252 | const Vector<Float>& xIn, |
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253 | const Vector<Float>& yIn) const |
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254 | { |
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255 | Int method = 1; // Linear |
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256 | Vector<Float> yOut; |
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257 | Vector<Bool> mOut; |
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258 | |
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259 | Vector<Bool> mIn(xIn.nelements(),True); |
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260 | |
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261 | InterpolateArray1D<Float,Float>::interpolate(yOut, mOut, xOut, |
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262 | xIn, yIn, mIn, |
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263 | method, True, True); |
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264 | |
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265 | return yOut; |
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266 | } |
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267 | |
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268 | void STAttr::initData() |
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269 | // |
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270 | // Mopra data from Mopra web page |
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271 | // Tid data from Tid web page |
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272 | // X in GHz |
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273 | // |
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274 | { |
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275 | |
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276 | // Beam efficiency |
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277 | MopEtaBeamX_.resize(3); |
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278 | MopEtaBeamX_(0) = 86.0; |
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279 | MopEtaBeamX_(1) = 100.0; |
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280 | MopEtaBeamX_(2) = 115.0; |
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281 | |
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282 | MopEtaBeam2003Y_.resize(3); |
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283 | MopEtaBeam2003Y_(0) = 0.39; |
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284 | MopEtaBeam2003Y_(1) = 0.37; |
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285 | MopEtaBeam2003Y_(2) = 0.37; // replicated from (1) |
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286 | |
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287 | MopEtaBeam2004Y_.resize(3); |
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288 | MopEtaBeam2004Y_(0) = 0.49; |
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289 | MopEtaBeam2004Y_(1) = 0.44; |
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290 | MopEtaBeam2004Y_(2) = 0.42; |
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291 | |
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292 | // Aperture efficiency |
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293 | MopEtaApX_.resize(2); |
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294 | MopEtaApX_(0) = 86.0; |
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295 | MopEtaApX_(1) = 115.0; |
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296 | |
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297 | MopEtaAp2004Y_.resize(2); |
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298 | MopEtaAp2004Y_(0) = 0.33; |
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299 | MopEtaAp2004Y_(1) = 0.24; |
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300 | |
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301 | TidEtaApX_.resize(2); |
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302 | TidEtaApY_.resize(2); |
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303 | TidEtaApX_(0) = 18.0; |
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304 | TidEtaApX_(1) = 26.5; |
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305 | TidEtaApY_(0) = 0.4848; |
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306 | TidEtaApY_(1) = 0.4848; |
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307 | |
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308 | // Gain elevation correction polynomial coefficients (for elevation |
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309 | // in degrees) |
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310 | |
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311 | TidGainElPoly_.resize(3); |
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312 | TidGainElPoly_(0) = 3.58788e-1; |
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313 | TidGainElPoly_(1) = 2.87243e-2; |
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314 | TidGainElPoly_(2) = -3.219093e-4; |
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315 | } |
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316 | |
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317 | |
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318 | Instrument STAttr::convertInstrument(const String& instrument, |
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319 | Bool throwIt) |
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320 | { |
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321 | String t(instrument); |
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322 | t.upcase(); |
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323 | |
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324 | // The strings are what STReader returns, after cunning |
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325 | // interrogation of station names... :-( |
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326 | Instrument inst = asap::UNKNOWNINST; |
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327 | if (t==String("DSS-43")) { |
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328 | inst = TIDBINBILLA; |
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329 | } else if (t==String("ATPKSMB")) { |
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330 | inst = ATPKSMB; |
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331 | } else if (t==String("ATPKSHOH")) { |
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332 | inst = ATPKSHOH; |
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333 | } else if (t==String("ATMOPRA")) { |
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334 | inst = ATMOPRA; |
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335 | } else if (t==String("CEDUNA")) { |
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336 | inst = CEDUNA; |
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337 | } else if (t==String("HOBART")) { |
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338 | inst = HOBART; |
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339 | } else { |
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340 | if (throwIt) { |
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341 | throw AipsError("Unrecognized instrument" |
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342 | " - use function scan.set_instrument to set"); |
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343 | } |
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344 | } |
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345 | return inst; |
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346 | } |
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