1 | //#--------------------------------------------------------------------------- |
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2 | //# STAttr.h: Return known attributes about 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: STAttr.h 1030 2006-04-23 10:29:45Z mar637 $ |
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30 | //#--------------------------------------------------------------------------- |
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31 | #ifndef STATTR_H |
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32 | #define STATTR_H |
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33 | |
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34 | #include <casa/aips.h> |
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35 | #include <measures/Measures/MEpoch.h> |
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36 | #include <casa/Utilities/CountedPtr.h> |
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37 | |
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38 | #include "Logger.h" |
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39 | #include "STDefs.h" |
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40 | |
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41 | namespace casa { |
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42 | template<class T> class Vector; |
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43 | } |
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44 | |
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45 | namespace asap { |
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46 | |
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47 | class STAttr : public Logger { |
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48 | |
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49 | public: |
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50 | |
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51 | // Constructor |
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52 | STAttr(); |
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53 | |
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54 | // Destructor |
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55 | virtual ~STAttr(); |
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56 | |
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57 | // Copy Constructor (copy semantics) |
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58 | STAttr(const STAttr& other); |
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59 | |
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60 | // Assignment (copy semantics) |
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61 | STAttr &operator=(const STAttr& other); |
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62 | |
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63 | // Telescope diameter(m). Throws exception if unknown. |
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64 | casa::Float diameter(Instrument inst) const; |
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65 | |
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66 | // Beam efficiency. Frequency in Hz. Returns 1 if unknown. |
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67 | casa::Vector<casa::Float> |
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68 | beamEfficiency(Instrument instr, const casa::MEpoch& dateObs, |
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69 | const casa::Vector<casa::Float>& freqs) const; |
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70 | |
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71 | // Aperture efficiency. Frequency in Hz. Returns 1 if unknown. |
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72 | casa::Vector<casa::Float> |
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73 | apertureEfficiency(Instrument instr, |
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74 | const casa::MEpoch& dateObs, |
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75 | const casa::Vector<casa::Float>& freqs) const; |
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76 | |
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77 | // Find factor to convert Jy -> K for this telescope, date of |
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78 | // observation and frequency (Hz) |
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79 | casa::Vector<casa::Float> JyPerK(Instrument instr, |
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80 | const casa::MEpoch& dateObs, |
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81 | const casa::Vector<casa::Float>& freqs) |
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82 | const; |
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83 | |
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84 | // Gain Elevation polynomial correction coefficients (elevation in |
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85 | // degrees) Returns length 0 if not known. |
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86 | casa::Vector<casa::Float> gainElevationPoly(Instrument instr) const; |
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87 | |
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88 | // Find feed polarization type of feeds. In future this needs to come |
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89 | // from the data themselves |
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90 | FeedPolType feedPolType(Instrument) const; |
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91 | |
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92 | // Helper function to check instrument (antenna) name and give enum |
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93 | static Instrument convertInstrument(const casa::String& instrument, |
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94 | casa::Bool throwIt); |
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95 | |
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96 | // Helper function. Finds factor to convert K -> Jy. Provide |
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97 | // aperture efficiency and dish geometric diameter (m) |
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98 | static casa::Float findJyPerK(casa::Float etaAp, casa::Float D); |
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99 | |
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100 | private: |
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101 | |
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102 | // Static data |
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103 | casa::Vector<casa::Float> MopEtaBeamX_; // Beam efficiency |
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104 | casa::Vector<casa::Float> MopEtaBeam2003Y_; |
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105 | casa::Vector<casa::Float> MopEtaBeam2004Y_; |
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106 | |
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107 | casa::Vector<casa::Float> MopEtaApX_; // Aperture efficiency |
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108 | casa::Vector<casa::Float> MopEtaAp2004Y_; |
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109 | |
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110 | casa::Vector<casa::Float> TidEtaApX_; // Aperture efficiency |
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111 | casa::Vector<casa::Float> TidEtaApY_; |
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112 | |
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113 | casa::Vector<casa::Float> TidGainElPoly_; // Gain-el correction poly coeffs |
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114 | |
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115 | // Init private data |
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116 | void initData(); |
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117 | |
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118 | // Linear interpolation |
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119 | casa::Vector<casa::Float> interp(const casa::Vector<casa::Float>& xOut, |
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120 | const casa::Vector<casa::Float>& xIn, |
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121 | const casa::Vector<casa::Float>& yIn) const; |
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122 | |
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123 | |
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124 | }; |
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125 | |
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126 | } // namespace |
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127 | |
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128 | #endif |
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