source: trunk/src/SDAttr.h@ 376

Last change on this file since 376 was 362, checked in by kil064, 20 years ago

move gain elevation info into here from SDMath

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.7 KB
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1//#---------------------------------------------------------------------------
2//# SDAttr.h: Return known attributes about telescopes
3//#---------------------------------------------------------------------------
4//# Copyright (C) 2004
5//# ATNF
6//#
7//# This program is free software; you can redistribute it and/or modify it
8//# under the terms of the GNU General Public License as published by the Free
9//# Software Foundation; either version 2 of the License, or (at your option)
10//# any later version.
11//#
12//# This program is distributed in the hope that it will be useful, but
13//# WITHOUT ANY WARRANTY; without even the implied warranty of
14//# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15//# Public License for more details.
16//#
17//# You should have received a copy of the GNU General Public License along
18//# with this program; if not, write to the Free Software Foundation, Inc.,
19//# 675 Massachusetts Ave, Cambridge, MA 02139, USA.
20//#
21//# Correspondence concerning this software should be addressed as follows:
22//# Internet email: Malte.Marquarding@csiro.au
23//# Postal address: Malte Marquarding,
24//# Australia Telescope National Facility,
25//# P.O. Box 76,
26//# Epping, NSW, 2121,
27//# AUSTRALIA
28//#
29//# $Id:
30//#---------------------------------------------------------------------------
31#ifndef SDATTR_H
32#define SDATTR_H
33
34#include "SDDefs.h"
35#include <casa/aips.h>
36#include <measures/Measures/MEpoch.h>
37
38template<class T> class casa::Vector;
39//class casa::MEpoch;
40
41
42
43namespace asap {
44
45class SDAttr {
46
47 public:
48
49// Constructor
50 SDAttr();
51
52// Destructor
53 ~SDAttr();
54
55// Copy Constructor (copy semantics)
56 SDAttr (const SDAttr& other);
57
58// Assignment (copy semantics)
59 SDAttr &operator=(const SDAttr& other);
60
61// Telescope diameter (m). Throws exception if unknown.
62 casa::Float diameter (Instrument inst) const;
63
64// Beam efficiency. Frequency in Hz. Returns 1 if unknown.
65 casa::Vector<casa::Float> beamEfficiency (Instrument instr, const casa::MEpoch& dateObs,
66 const casa::Vector<casa::Float>& freqs) const;
67
68// Aperture efficiency. Frequency in Hz. Returns 1 if unknown.
69 casa::Vector<casa::Float> apertureEfficiency (Instrument instr, const casa::MEpoch& dateObs,
70 const casa::Vector<casa::Float>& freqs) const;
71
72// Find factor to convert Jy -> K for this telescope, date of observation and frequency (Hz)
73 casa::Vector<casa::Float> JyPerK (Instrument instr, const casa::MEpoch& dateObs,
74 const casa::Vector<casa::Float>& freqs) const;
75
76// Factor to convert K -> Jy. Provide aperture efficiency and dish geometric diameter (m)
77 static casa::Float findJyPerKFac (casa::Float etaAp, casa::Float D);
78
79// Gain Elevation polynomial correction coefficients (elevation in degrees)
80// Returns length 0 if not known.
81 casa::Vector<casa::Float> gainElevationPoly (Instrument instr) const;
82
83 private:
84
85// Static data
86
87 casa::Vector<casa::Float> MopEtaBeamX_; // Beam efficiency
88 casa::Vector<casa::Float> MopEtaBeam2003Y_;
89 casa::Vector<casa::Float> MopEtaBeam2004Y_;
90//
91 casa::Vector<casa::Float> MopEtaApX_; // Aperture efficiency
92 casa::Vector<casa::Float> MopEtaAp2004Y_;
93//
94 casa::Vector<casa::Float> TidGainElPoly_; // Gain-el correction poly coeffs
95
96// Init private data
97 void initData();
98
99// Linear interpolation
100 casa::Vector<casa::Float> interp (const casa::Vector<casa::Float>& xOut, const casa::Vector<casa::Float>& xIn,
101 const casa::Vector<casa::Float>& yIn) const;
102};
103
104} // namespace
105
106#endif
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