Line data Source code
1 : //# FluxCalcVQS.h: Base class for flux standard calculations taking into account for
2 : //# time variability
3 : //# Copyright (C) 2013
4 : //# Associated Universities, Inc. Washington DC, USA.
5 : //#
6 : //# This library is free software; you can redistribute it and/or modify it
7 : //# under the terms of the GNU Library General Public License as published by
8 : //# the Free Software Foundation; either version 2 of the License, or (at your
9 : //# option) any later version.
10 : //#
11 : //# This library is distributed in the hope that it will be useful, but WITHOUT
12 : //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 : //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
14 : //# License for more details.
15 : //#
16 : //# You should have received a copy of the GNU Library General Public License
17 : //# along with this library; if not, write to the Free Software Foundation,
18 : //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
19 : //#
20 : //# Correspondence concerning AIPS++ should be adressed as follows:
21 : //# Internet email: casa-feedback@nrao.edu.
22 : //# Postal address: AIPS++ Project Office
23 : //# National Radio Astronomy Observatory
24 : //# 520 Edgemont Road
25 : //# Charlottesville, VA 22903-2475 USA
26 : //#
27 : //#
28 : #ifndef COMPONENTS_FLUXCALCVQS_H
29 : #define COMPONENTS_FLUXCALCVQS_H
30 :
31 : #include <components/ComponentModels/FluxStandard.h>
32 : #include <components/ComponentModels/FluxStdSrcs.h>
33 : #include <casacore/casa/BasicSL/String.h>
34 : #include <casacore/casa/OS/Path.h>
35 : #include <casacore/measures/Measures/MDirection.h>
36 : #include <casacore/tables/Tables/Table.h>
37 :
38 : //# Handy for passing anonymous arrays to functions.
39 : #include <casacore/scimath/Mathematics/RigidVector.h>
40 :
41 : #include <casacore/scimath/Functionals/Interpolate1D.h>
42 : #include <map>
43 :
44 :
45 : namespace casacore{
46 :
47 : class MFrequency;
48 : //class Vector;
49 : }
50 :
51 : namespace casa { //# NAMESPACE CASA - BEGIN
52 :
53 : //class Flux;
54 :
55 : // <summary>
56 : // FluxCalcVQS: Base class for flux standard calculations taking account for
57 : // time variability of the sources.
58 : // </summary>
59 :
60 : // <use visibility=export>
61 :
62 : // <reviewed reviewer="" date="" tests="" demos="">
63 :
64 : // <prerequisite>
65 : // <li><linkto class="FluxStandard">FluxStandard</linkto> module
66 : // </prerequisite>
67 : //
68 : // <etymology>
69 : // From "flux density", "calculator", "variable", and "quasistatic".
70 : // </etymology>
71 : //
72 : // <synopsis>
73 : // The FluxCalcVQS class provides an interface and a small amount of machinery
74 : // for computing total flux densities of calibrators which may be variable in time.
75 : // For the source with significant enough time variability, inteploation in time
76 : // with choice of nearest neighbour, linear, cubic, or cubic spline, is performed.
77 : // See FluxStdsQS for actual definitions of the standards. The polynomial coefficents
78 : // for the standard include time-variable sources are assumed to be stored in an external
79 : // table.
80 : // </synopsis>
81 : //
82 : // <example>
83 : // <srcblock>
84 : // </srcblock>
85 : // </example>
86 : //
87 : // <motivation>
88 : // Provide a base interface for calculating standard flux
89 : // densities, and include any common functions.
90 : // </motivation>
91 :
92 : class FluxCalcVQS: public FluxStdSrcs
93 : {
94 : public:
95 :
96 : typedef FluxCalcVQS FCVQS;
97 : typedef casacore::RigidVector<casacore::String, 4> RVS4;
98 : typedef casacore::RigidVector<casacore::String, 5> RVS5;
99 :
100 : // Source identifiers.
101 : /****
102 : enum Source {
103 : THREEC286 = 0, // 3C286
104 : THREEC48,
105 : THREEC147,
106 : THREEC138,
107 : NINETEEN34M638, // 1934-638
108 : THREEC295,
109 : THREEC196,
110 : THREEC123,
111 : // The number of standards in this enumerator.
112 : NUMBER_SOURCES,
113 : UNKNOWN_SOURCE = NUMBER_SOURCES
114 : };
115 : ***/
116 : virtual ~FluxCalcVQS();
117 :
118 : virtual casacore::Bool operator()(Flux<casacore::Double>& value, Flux<casacore::Double>& error,
119 : const casacore::MFrequency& mfreq, const casacore::Bool updatecoeffs) = 0;
120 : casacore::Bool operator()(casacore::Vector<Flux<casacore::Double> >& values,
121 : casacore::Vector<Flux<casacore::Double> >& errors,
122 : const casacore::Vector<casacore::MFrequency>& mfreqs);
123 :
124 : //for time variable case with interpolation method
125 : casacore::Bool operator()(casacore::Vector<Flux<casacore::Double> >& values,
126 : casacore::Vector<Flux<casacore::Double> >& errors,
127 : const casacore::Vector<casacore::MFrequency>& mfreqs,
128 : const casacore::MEpoch& mtime,
129 : const casacore::String& interpmethod);
130 :
131 : // If a FS::Source enum matches srcName, returns the enum.
132 : // Otherwise, FCQS::UNKNOWN_SOURCE.
133 : //FCQS::Source srcNameToEnum(const casacore::String& srcName) const;
134 :
135 : // Sets srcEnum_p = srcNameToEnum(sourceName), and returns
136 : // srcEnum_p != FCQS::UNKNOWN_SOURCE
137 : virtual casacore::Bool setSource(const casacore::String& sourceName, const casacore::MDirection& sourceDir);
138 :
139 : FCVQS::Source getSrcEnum();
140 :
141 : //casacore::MDirection getDirection() {return directions_p[srcEnum_p];}
142 37 : casacore::MDirection getDirection() {return FluxStdSrcs::getDirection(srcEnum_p);}
143 :
144 : // Read the coefficient data table
145 : void readQSCoeffsTable(const casacore::Path& fileName);
146 : // Interpolate for time variable source
147 : void interpolate(const casacore::String& interpmethod);
148 : // Set the coefficients from one epoch where i is row number in the original data table
149 : void setSourceCoeffsfromVec(casacore::uInt& i);
150 : // Get currently set coefficients
151 2048 : casacore::RigidVector<casacore::Vector<casacore::Float>,2 > getCurrentCoeffs() {return tvcoeffs_p;}
152 : //casacore::RigidVector<casacore::Double,2 > getValidFreqRange() {return validfreqrange_p;}
153 2053 : casacore::Vector<casacore::MFrequency> getValidFreqRange() {return validfreqrange_p;}
154 :
155 : //keep track if it is non-time var source for Perley-Butler2013
156 : void isTimeVar(casacore::Bool istimevar);
157 :
158 : protected:
159 : FluxCalcVQS(); // Initializes names_p.
160 :
161 : private:
162 : FCVQS::Source srcEnum_p; // The source identifier.
163 :
164 : // A map from an FS::Source enum to a list of recognized names for it.
165 : //std::map<FCQS::Source, casacore::Vector<casacore::String> > names_p;
166 :
167 : // A map from an FS::Source enum to its J2000 direction.
168 : //std::map<FCQS::Source, casacore::MDirection> directions_p;
169 :
170 : // get interpolate method enum
171 : casacore::Interpolate1D<casacore::Double,casacore::Float>::Method getInterpMethod_p(const casacore::String& interpmethod);
172 :
173 : //convert epochs in year.frac to mjds
174 : void convertYearFracToMjd(const casacore::Vector<casacore::Double>& yearfrac, casacore::Vector<casacore::Double>& mjds);
175 :
176 : casacore::Vector<casacore::Double> epochvec_p;
177 : casacore::Matrix<casacore::Float> coeffsmat_p;
178 : casacore::Matrix<casacore::Float> coefferrsmat_p;
179 : casacore::Vector<casacore::Float> fluxes_p;
180 : //casacore::Vector<casacore::Float> tvcoeffs_p;
181 : casacore::RigidVector<casacore::Vector<casacore::Float>,2> tvcoeffs_p;
182 : casacore::Vector<casacore::MFrequency> validfreqrange_p;
183 : casacore::Table Table_p;
184 : casacore::Bool istimevar_p;
185 : //virtual casacore::Bool setCoeffs() = 0;
186 : //
187 : };
188 :
189 : } //# NAMESPACE CASA - END
190 :
191 : #endif /* COMPONENTS_FLUXCALCVQS_H */
|
