[353] | 1 | //#--------------------------------------------------------------------------- |
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| 2 | //# SDAttr.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 "SDAttr.h" |
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| 33 | #include <casa/aips.h> |
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| 34 | #include <casa/Arrays/Vector.h> |
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| 35 | #include <casa/Arrays/ArrayMath.h> |
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| 36 | #include <casa/Exceptions.h> |
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| 37 | #include <casa/Quanta/QC.h> |
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| 38 | #include <casa/Quanta/Quantum.h> |
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[394] | 39 | #include <casa/Quanta/MVTime.h> |
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[353] | 40 | |
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| 41 | #include <measures/Measures/MEpoch.h> |
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| 42 | |
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| 43 | #include <scimath/Mathematics/InterpolateArray1D.h> |
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| 44 | |
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| 45 | using namespace casa; |
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| 46 | using namespace asap; |
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| 47 | |
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| 48 | SDAttr::SDAttr () |
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| 49 | { |
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[361] | 50 | initData(); |
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[353] | 51 | } |
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| 52 | |
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| 53 | SDAttr::SDAttr(const SDAttr& other) |
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| 54 | { |
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[361] | 55 | initData(); // state just private 'static' data |
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[353] | 56 | } |
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| 57 | |
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| 58 | SDAttr& SDAttr::operator=(const SDAttr& other) |
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| 59 | { |
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| 60 | if (this != &other) { |
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| 61 | ; // state just private 'static' data |
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| 62 | } |
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| 63 | return *this; |
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| 64 | } |
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| 65 | |
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| 66 | SDAttr::~SDAttr() |
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| 67 | {;} |
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| 68 | |
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| 69 | |
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| 70 | Float SDAttr::diameter (Instrument inst) const |
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| 71 | { |
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| 72 | Float D = 1.0; |
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[362] | 73 | switch (inst) { |
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| 74 | case ATMOPRA: |
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| 75 | { |
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| 76 | D = 22.0; |
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| 77 | } |
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| 78 | break; |
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| 79 | case ATPKSMB: |
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| 80 | case ATPKSHOH: |
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| 81 | { |
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| 82 | D = 64.0; |
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| 83 | } |
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| 84 | break; |
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| 85 | case TIDBINBILLA: |
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| 86 | { |
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| 87 | D = 70.0; |
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| 88 | } |
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| 89 | break; |
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| 90 | case CEDUNA: |
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| 91 | { |
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| 92 | D = 30.0; |
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| 93 | } |
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| 94 | break; |
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| 95 | case HOBART: |
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| 96 | { |
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| 97 | D = 26.0; |
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| 98 | } |
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| 99 | break; |
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| 100 | default: |
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| 101 | { |
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| 102 | throw(AipsError("Unknown instrument")); |
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| 103 | } |
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[353] | 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> SDAttr::beamEfficiency (Instrument inst, const MEpoch& dateObs, const Vector<Float>& freqs) const |
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| 110 | { |
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| 111 | |
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| 112 | // Look at date where appropriate |
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| 113 | |
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[394] | 114 | MVTime t(dateObs.getValue()); |
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| 115 | uInt year = t.year(); |
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| 116 | // |
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[353] | 117 | Vector<Float> facs(freqs.nelements(),1.0); |
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[362] | 118 | switch (inst) { |
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| 119 | case ATMOPRA: |
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| 120 | { |
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[394] | 121 | if (year<2003) { |
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| 122 | cerr << "There is no beam efficiency data from before 2003 - using 2003 data" << endl; |
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| 123 | facs = interp (freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2003Y_); |
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| 124 | } else if (year==2003) { |
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| 125 | cerr << "Using beam efficiency data from 2003" << endl; |
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| 126 | facs = interp (freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2003Y_); |
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| 127 | } else { |
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| 128 | cerr << "Using beam efficiency data from 2004" << endl; |
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| 129 | facs = interp (freqs/1.0e9f, MopEtaBeamX_, MopEtaBeam2004Y_); |
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| 130 | } |
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[362] | 131 | } |
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| 132 | break; |
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| 133 | default: |
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| 134 | { |
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| 135 | cerr << "No beam efficiency data for this instrument - assuming unity" << endl; |
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| 136 | } |
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[353] | 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> SDAttr::apertureEfficiency (Instrument inst, const MEpoch& dateObs, const Vector<Float>& freqs) const |
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| 143 | { |
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| 144 | |
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| 145 | // Look at date where appropriate |
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| 146 | |
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[394] | 147 | MVTime t(dateObs.getValue()); |
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| 148 | uInt year = t.year(); |
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| 149 | // |
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[353] | 150 | Vector<Float> facs(freqs.nelements(),1.0); |
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[362] | 151 | switch (inst) { |
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| 152 | case ATMOPRA: |
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| 153 | { |
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[394] | 154 | if (year<2004) { |
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| 155 | cerr << "There is no aperture efficiency data from before 2004 - using 2004 data" << endl; |
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| 156 | facs = interp (freqs/1.0e9f, MopEtaApX_, MopEtaAp2004Y_); |
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| 157 | } else { |
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| 158 | cerr << "Using aperture efficiency data from 2004" << endl; |
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| 159 | facs = interp (freqs/1.0e9f, MopEtaApX_, MopEtaAp2004Y_); |
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| 160 | } |
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[362] | 161 | } |
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| 162 | break; |
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| 163 | default: |
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| 164 | { |
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| 165 | cerr << "No aperture efficiency data for this instrument - assuming unity" << endl; |
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| 166 | } |
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[353] | 167 | } |
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| 168 | return facs; |
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| 169 | } |
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| 170 | |
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| 171 | Vector<Float> SDAttr::JyPerK (Instrument inst, const MEpoch& dateObs, const Vector<Float>& freqs) const |
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| 172 | { |
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| 173 | |
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| 174 | // FInd what we need |
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| 175 | |
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| 176 | Vector<Float> etaAp = apertureEfficiency (inst, dateObs, freqs); |
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| 177 | Float D = diameter(inst); |
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| 178 | |
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| 179 | // Compute it |
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| 180 | |
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| 181 | Vector<Float> facs(freqs.nelements(),1.0); |
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| 182 | for (uInt i=0; i<freqs.nelements(); i++) { |
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| 183 | facs(i) = SDAttr::findJyPerKFac (etaAp(i), D); |
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| 184 | } |
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| 185 | // |
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| 186 | return facs; |
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| 187 | } |
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| 188 | |
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| 189 | |
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| 190 | Float SDAttr::findJyPerKFac (Float etaAp, Float D) |
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| 191 | // |
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| 192 | // Converts K -> Jy |
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| 193 | // D in m |
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| 194 | // |
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| 195 | { |
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| 196 | Double kb = QC::k.getValue(Unit(String("erg/K"))); |
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| 197 | Float gA = C::pi * D * D / 4.0; |
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| 198 | return (2.0 * 1.0e19 * kb / etaAp / gA); |
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| 199 | } |
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| 200 | |
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| 201 | |
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[362] | 202 | Vector<Float> SDAttr::gainElevationPoly (Instrument inst) const |
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| 203 | { |
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[353] | 204 | |
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[362] | 205 | // Look at date where appropriate |
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| 206 | |
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| 207 | switch (inst) { |
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| 208 | case TIDBINBILLA: |
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| 209 | { |
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| 210 | return TidGainElPoly_.copy(); |
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| 211 | } |
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| 212 | break; |
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| 213 | default: |
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| 214 | { |
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| 215 | Vector<Float> t; |
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| 216 | return t.copy(); |
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| 217 | } |
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| 218 | } |
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| 219 | } |
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| 220 | |
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| 221 | |
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| 222 | |
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| 223 | |
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[353] | 224 | // Private |
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| 225 | |
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| 226 | Vector<Float> SDAttr::interp (const Vector<Float>& xOut, const Vector<Float>& xIn, |
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| 227 | const Vector<Float>& yIn) const |
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| 228 | { |
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| 229 | Int method = 1; // Linear |
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| 230 | Vector<Float> yOut; |
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| 231 | Vector<Bool> mOut; |
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| 232 | // |
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| 233 | Vector<Bool> mIn(xIn.nelements(),True); |
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| 234 | // |
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| 235 | InterpolateArray1D<Float,Float>::interpolate(yOut, mOut, xOut, |
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| 236 | xIn, yIn, mIn, |
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| 237 | method, True, True); |
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| 238 | // |
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| 239 | return yOut; |
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| 240 | } |
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| 241 | |
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[361] | 242 | void SDAttr::initData () |
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| 243 | // |
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| 244 | // Mopra data from online Mopra guide. |
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| 245 | // |
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[362] | 246 | { |
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| 247 | |
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| 248 | // Beam efficiency |
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| 249 | |
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[353] | 250 | MopEtaBeamX_.resize(3); |
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| 251 | MopEtaBeamX_(0) = 86.0; |
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| 252 | MopEtaBeamX_(1) = 100.0; |
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| 253 | MopEtaBeamX_(2) = 115.0; |
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| 254 | // |
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| 255 | MopEtaBeam2003Y_.resize(3); |
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| 256 | MopEtaBeam2003Y_(0) = 0.39; |
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| 257 | MopEtaBeam2003Y_(1) = 0.37; |
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| 258 | MopEtaBeam2003Y_(2) = 0.37; // replicated from (1) |
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| 259 | // |
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| 260 | MopEtaBeam2004Y_.resize(3); |
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| 261 | MopEtaBeam2004Y_(0) = 0.49; |
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| 262 | MopEtaBeam2004Y_(1) = 0.44; |
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[361] | 263 | MopEtaBeam2004Y_(2) = 0.42; |
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[362] | 264 | |
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| 265 | // Aperture efficiency |
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| 266 | |
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[353] | 267 | MopEtaApX_.resize(2); |
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| 268 | MopEtaApX_(0) = 86.0; |
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| 269 | MopEtaApX_(1) = 115.0; |
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| 270 | // |
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| 271 | MopEtaAp2004Y_.resize(2); |
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| 272 | MopEtaAp2004Y_(0) = 0.33; |
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| 273 | MopEtaAp2004Y_(1) = 0.24; |
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[362] | 274 | |
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| 275 | // Gain elevation correction polynomial coefficients (for elevation in degrees) |
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| 276 | |
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| 277 | TidGainElPoly_.resize(3); |
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| 278 | TidGainElPoly_(0) = 3.58788e-1; |
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| 279 | TidGainElPoly_(1) = 2.87243e-2; |
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| 280 | TidGainElPoly_(2) = -3.219093e-4; |
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[353] | 281 | } |
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