source: trunk/src/SDMath.h @ 532

Last change on this file since 532 was 532, checked in by kil064, 19 years ago

add Tsys weighting to average_pol
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[2]1//#---------------------------------------------------------------------------
2//# SDMath.h: A collection of single dish mathematical operations
3//#---------------------------------------------------------------------------
4//# Copyright (C) 2004
[125]5//# ATNF
[2]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//#---------------------------------------------------------------------------
[125]31#ifndef SDMATH_H
32#define SDMATH_H
[2]33
[38]34#include <string>
35#include <vector>
[130]36#include <casa/aips.h>
[81]37#include <casa/Utilities/CountedPtr.h>
[309]38#include <coordinates/Coordinates/FrequencyAligner.h>
[294]39
[234]40#include "SDDefs.h"
[2]41
[227]42class casa::Table;
[272]43class casa::MEpoch;
[294]44class casa::MPosition;
45template<class T> class casa::PtrBlock;
[330]46template<class T> class casa::Matrix;
47template<class T> class casa::ROScalarColumn;
48template<class T> class casa::ROArrayColumn;
[227]49
[272]50
[330]51
[83]52namespace asap {
[2]53
54class SDMemTable;
[330]55class SDDataDesc;
[2]56
[170]57class SDMath {
[152]58
[170]59 public:
60
61// Default constructor
62   SDMath();
63
64// Copy Constructor (copy semantics)
65   SDMath (const SDMath& other);
66
67// Assignment  (copy semantics)
68   SDMath &operator=(const SDMath& other);
69
[183]70// Destructor
71   ~SDMath();
72
[248]73// Binary Table operators. op=ADD, SUB, MUL, DIV, QUOTIENT
74   casa::CountedPtr<SDMemTable> binaryOperate (const casa::CountedPtr<SDMemTable>& left,
75                                               const casa::CountedPtr<SDMemTable>& right,
[294]76                                               const casa::String& op, casa::Bool preserve,
77                                               casa::Bool tSys) const;
[152]78
79// Average in time
[175]80   casa::CountedPtr<SDMemTable>  average(const casa::Block<casa::CountedPtr<SDMemTable> >& in,
81                                         const casa::Vector<casa::Bool>& mask,
[234]82                                         casa::Bool scanAverage,
[248]83                                         const casa::String& weightStr,
[309]84                                         casa::Bool align=casa::False) const;
[48]85
[234]86// Statistics. If row<0, all rows are done otherwise, just the
87// specified row.
[170]88   std::vector<float> statistic(const casa::CountedPtr<SDMemTable>& in,
[234]89                                const casa::Vector<casa::Bool>& mask,
90                                const casa::String& which, casa::Int row) const;
[130]91
[171]92// Bin up spectra
[234]93   SDMemTable* bin(const SDMemTable& in, casa::Int width) const;
[171]94
[299]95// Resample spectra
96   SDMemTable* resample(const SDMemTable& in, const casa::String& method,
97                        casa::Float factor) const;
98
[177]99// Smooth
100   SDMemTable* smooth (const SDMemTable& in, const casa::String& kernel,
[234]101                       casa::Float width, casa::Bool doAll) const;
[177]102
[221]103// Flux conversion between Jansky and Kelvin
[354]104   SDMemTable* convertFlux (const SDMemTable& in, casa::Float D, casa::Float etaAp,
105                            casa::Float JyPerK, casa::Bool doAll) const;
[221]106
[227]107// Gain-elevation correction
[234]108   SDMemTable* gainElevation (const SDMemTable& in, const casa::Vector<casa::Float>& coeffs,
109                              const casa::String& fileName,
110                              const casa::String& method, casa::Bool doAll) const;
[227]111
[309]112// Frequency Alignment
[317]113   SDMemTable* frequencyAlignment (const SDMemTable& in, const casa::String& refTime,
[397]114                                   const casa::String& method, casa::Bool perFreqID) const;
[262]115
[234]116// Opacity correction
117   SDMemTable* opacity (const SDMemTable& in, casa::Float tau, casa::Bool doAll) const;
118
[248]119// Simple unary mathematical operations.  what=0 (mul) or 1 (add)
120   SDMemTable* unaryOperate(const SDMemTable& in, casa::Float offset,
[294]121                            casa::Bool doAll, casa::uInt what, casa::Bool tSys) const;
[169]122
[532]123// Average polarizations.
[315]124   SDMemTable* averagePol(const SDMemTable& in, const casa::Vector<casa::Bool>& mask,
125                          const casa::String& wtStr) const;
[169]126
[502]127// Rotate XY phase. Value in degrees.
[457]128   void rotateXYPhase (SDMemTable& in, casa::Float value, casa::Bool doAll);
129
[502]130// Rotate Q & U by operating on the raw correlations.Value in degrees.
131   void rotateLinPolPhase (SDMemTable& in, casa::Float value, casa::Bool doAll);
[457]132
[502]133
[170]134 private:
[169]135
[152]136// Weighting type for time averaging
137
[518]138  enum WeightType {NONE,VAR,TSYS,TINT};
[144]139
[152]140// Function to use accumulate data during time averaging
141
[146]142  void accumulate (casa::Double& timeSum, casa::Double& intSum, casa::Int& nAccum,
143                   casa::MaskedArray<casa::Float>& sum, casa::Array<casa::Float>& sumSq,
144                   casa::Array<casa::Float>& nPts, casa::Array<casa::Float>& tSysSum,
[518]145                   casa::Array<casa::Float>& tSysSqSum,
[146]146                   const casa::Array<casa::Float>& tSys,  const casa::Array<casa::Float>& nInc,
147                   const casa::Vector<casa::Bool>& mask, casa::Double time, casa::Double interval,
148                   const casa::Block<casa::CountedPtr<SDMemTable> >& in,
149                   casa::uInt iTab, casa::uInt iRow, casa::uInt axis, casa::uInt nAxesSub,
[227]150                   casa::Bool useMask, WeightType wtType) const;
[146]151
[354]152// Work out conversion factor for converting Jy<->K per IF per row and apply
153   void convertBrightnessUnits (SDMemTable* pTabOut, const SDMemTable& in,
154                                casa::Bool toKelvin, casa::Float sFac, casa::Bool doAll) const;
[152]155
[162]156// Convert weight string to enum value
157
[518]158   void convertWeightString (WeightType& wt, const casa::String& weightStr,
159                             casa::Bool listType) const;
[227]160
161// Convert interpolation type string
[317]162//   void convertInterpString(casa::Int& type, const casa::String& interp) const;
163   void convertInterpString(casa::InterpolateArray1D<casa::Double,casa::Float>::InterpolationMethod& method, 
164                             const casa::String& interp) const;
[227]165
[480]166// Scale data with values from an ascii Table
167   void scaleFromAsciiTable(SDMemTable* pTabOut, const SDMemTable& in,
[234]168                              const casa::String& fileName,
169                              const casa::String& col0, const casa::String& col1,
170                              const casa::String& methodStr, casa::Bool doAll,
[480]171                              const casa::Vector<casa::Float>& xOut, casa::Bool doTSys) const;
[230]172
[480]173// Scale data with values from a Table
174   void scaleFromTable(SDMemTable* pTabOut, const SDMemTable& in, const casa::Table& tTable,
[234]175                         const casa::String& col0, const casa::String& col1,
176                         const casa::String& methodStr, casa::Bool doAll,
[480]177                         const casa::Vector<casa::Float>& xOut, casa::Bool doTSys) const;
[230]178
[480]179// Scale data and optionally TSys by values in a Vector
180   void scaleByVector (SDMemTable* pTabOut, const SDMemTable& in,
181                       casa::Bool doAll, const casa::Vector<casa::Float>& factor,
182                       casa::Bool doTSys) const;
[234]183
[354]184// Convert time String to Epoch
185   casa::MEpoch epochFromString (const casa::String& str, casa::MEpoch::Types timeRef) const;
[234]186
[354]187// Function to fill Scan Container when averaging in time
[234]188
[354]189  void fillSDC (SDContainer& sc, const casa::Array<casa::Bool>& mask,
190                const casa::Array<casa::Float>& data,
191                const casa::Array<casa::Float>& tSys,
192                casa::Int scanID, casa::Double timeStamp,
193                casa::Double interval, const casa::String& sourceName,
194                const casa::Vector<casa::uInt>& freqID) const;
195
196// Format EPoch
197   casa::String formatEpoch(const casa::MEpoch& epoch)  const;
198
199// Align in Frequency
200   SDMemTable* frequencyAlign (const SDMemTable& in,
201                              casa::MFrequency::Types system,
202                              const casa::String& timeRef,
[397]203                              const casa::String& method, casa::Bool perIF) const;
[354]204
[309]205// Generate frequency aligners
206   void generateFrequencyAligners (casa::PtrBlock<casa::FrequencyAligner<casa::Float>* >& a,
[330]207                                   const SDDataDesc& dDesc,
[309]208                                   const SDMemTable& in, casa::uInt nChan,
209                                   casa::MFrequency::Types system,
210                                   const casa::MPosition& refPos,
[397]211                                   const casa::MEpoch& refEpoch, casa::Bool perFreqID) const;
[294]212
[330]213// Generate data description table (combines source and freqID)
214   void generateDataDescTable (casa::Matrix<casa::uInt>& ddIdx,
215                               SDDataDesc& dDesc,
216                               casa::uInt nIF,
217                               const SDMemTable& in,
218                               const casa::Table& tabIn,
219                               const casa::ROScalarColumn<casa::String>& srcCol,
[397]220                               const casa::ROArrayColumn<casa::uInt>& fqIDCol,
221                               casa::Bool perFreqID) const;
[330]222
[480]223// Get row range from SDMemTable state
224   casa::Vector<casa::uInt> getRowRange (const SDMemTable& in) const;
225
226// Is row in the row range ?
227   casa::Bool rowInRange (casa::uInt i, const casa::Vector<casa::uInt>& range) const;
228
[434]229// Set slice to cursor or all axes
230    void setCursorSlice (casa::IPosition& start, casa::IPosition& end,
231                         casa::Bool doAll, const SDMemTable& in) const;
[272]232
[354]233// Function to normalize data when averaging in time
[272]234
[354]235  void normalize (casa::MaskedArray<casa::Float>& data,
236                  const casa::Array<casa::Float>& sumSq,
[518]237                  const casa::Array<casa::Float>& tSysSumSq,
[354]238                  const casa::Array<casa::Float>& nPts,
[518]239                  casa::Double intSum,
[354]240                  WeightType wtType, casa::Int axis, casa::Int nAxes) const;
241
242// Put the data and mask into the SDContainer
243   void putDataInSDC (SDContainer& sc, const casa::Array<casa::Float>& data,
244                      const casa::Array<casa::Bool>& mask) const;
245
246// Read ascii file into a Table
247
248   casa::Table readAsciiFile (const casa::String& fileName) const;
[165]249};
[146]250
[330]251
252
253
[165]254} // namespace
[146]255
[165]256#endif
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