[353] | 1 | //#--------------------------------------------------------------------------- |
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[878] | 2 | //# STAttr.cc: A collection of attributes for different telescopes |
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[353] | 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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[394] | 38 | #include <casa/Quanta/MVTime.h> |
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[353] | 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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[878] | 44 | #include "STAttr.h" |
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[717] | 45 | |
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[353] | 46 | using namespace casa; |
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| 47 | using namespace asap; |
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| 48 | |
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[878] | 49 | STAttr::STAttr() |
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[353] | 50 | { |
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[361] | 51 | initData(); |
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[353] | 52 | } |
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| 53 | |
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[878] | 54 | STAttr::STAttr(const STAttr& other) |
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[353] | 55 | { |
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[717] | 56 | initData(); // state just private 'static' data |
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[353] | 57 | } |
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| 58 | |
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[878] | 59 | STAttr& STAttr::operator=(const STAttr& other) |
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[353] | 60 | { |
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| 61 | if (this != &other) { |
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[717] | 62 | ; // state just private 'static' data |
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[353] | 63 | } |
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| 64 | return *this; |
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| 65 | } |
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| 66 | |
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[878] | 67 | STAttr::~STAttr() |
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[353] | 68 | {;} |
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| 69 | |
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| 70 | |
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[878] | 71 | Float STAttr::diameter(Instrument inst) const |
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[353] | 72 | { |
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| 73 | Float D = 1.0; |
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[362] | 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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[353] | 105 | } |
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| 106 | return D; |
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| 107 | } |
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| 108 | |
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[878] | 109 | Vector<Float> STAttr::beamEfficiency(Instrument inst, const MEpoch& dateObs, |
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[717] | 110 | const Vector<Float>& freqs) const |
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[353] | 111 | { |
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| 112 | |
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[717] | 113 | // Look at date where appropriate |
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[394] | 114 | MVTime t(dateObs.getValue()); |
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| 115 | uInt year = t.year(); |
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[717] | 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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[717] | 119 | case ATMOPRA: |
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[362] | 120 | { |
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[717] | 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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[362] | 132 | } |
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| 133 | break; |
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[717] | 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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[353] | 138 | } |
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| 139 | return facs; |
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| 140 | } |
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| 141 | |
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[878] | 142 | Vector<Float> STAttr::apertureEfficiency(Instrument inst, |
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[717] | 143 | const MEpoch& dateObs, |
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| 144 | const Vector<Float>& freqs) const |
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[353] | 145 | { |
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[717] | 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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[353] | 177 | } |
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| 178 | |
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[878] | 179 | Vector<Float> STAttr::JyPerK(Instrument inst, const MEpoch& dateObs, |
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[717] | 180 | const Vector<Float>& freqs) const |
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[353] | 181 | { |
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[717] | 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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[353] | 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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[878] | 189 | facs(i) = STAttr::findJyPerK(etaAp(i), D); |
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[353] | 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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[878] | 195 | Float STAttr::findJyPerK(Float etaAp, Float D) |
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[717] | 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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[353] | 200 | { |
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[717] | 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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[353] | 204 | } |
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| 205 | |
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| 206 | |
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[878] | 207 | Vector<Float> STAttr::gainElevationPoly(Instrument inst) const |
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[362] | 208 | { |
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[353] | 209 | |
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[717] | 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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[362] | 223 | } |
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| 224 | |
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[878] | 225 | FeedPolType STAttr::feedPolType(Instrument inst) const |
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[507] | 226 | { |
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[717] | 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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[507] | 247 | } |
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[362] | 248 | |
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| 249 | |
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[353] | 250 | // Private |
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[878] | 251 | Vector<Float> STAttr::interp(const Vector<Float>& xOut, |
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[717] | 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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[353] | 258 | |
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[717] | 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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[353] | 266 | } |
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| 267 | |
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[878] | 268 | void STAttr::initData() |
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[717] | 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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[362] | 274 | { |
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| 275 | |
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[717] | 276 | // Beam efficiency |
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[353] | 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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[717] | 281 | |
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[353] | 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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[717] | 285 | MopEtaBeam2003Y_(2) = 0.37; // replicated from (1) |
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| 286 | |
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[353] | 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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[361] | 290 | MopEtaBeam2004Y_(2) = 0.42; |
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[362] | 291 | |
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[717] | 292 | // Aperture efficiency |
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[353] | 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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[717] | 296 | |
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[353] | 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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[717] | 300 | |
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[467] | 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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[362] | 307 | |
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[717] | 308 | // Gain elevation correction polynomial coefficients (for elevation |
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| 309 | // in degrees) |
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[362] | 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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[353] | 315 | } |
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[475] | 316 | |
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| 317 | |
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[878] | 318 | Instrument STAttr::convertInstrument(const String& instrument, |
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[475] | 319 | Bool throwIt) |
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| 320 | { |
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[717] | 321 | String t(instrument); |
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| 322 | t.upcase(); |
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| 323 | |
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[878] | 324 | // The strings are what STReader returns, after cunning |
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[717] | 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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[475] | 346 | } |
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