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/* DATAIO - FITS-IDI interface to PolConvert
Copyright (C) 2013 Ivan Marti-Vidal
Nordic Node of EU ALMA Regional Center (Onsala, Sweden)
Max-Planck-Institut fuer Radioastronomie (Bonn, Germany)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include <sys/types.h>
#include <iostream>
#include <fstream>
#include <math.h>
#include <complex>
#include "fitsio.h"
#ifndef __DATAIO_H__
#define __DATAIO_H__
typedef std::complex<float> cplx32f;
typedef struct {
double Nu0;
int Nchan;
double BW;
bool SB;
} FreqSetup;
typedef struct {
double *BaseLine[3];
double *SinDec;
double *CosDec;
double *AntLon;
int *Mount;
double *Lat;
int NtotAnt;
int NtotSou;
int **BasNum;
} ArrayGeometry;
typedef struct {
int AntIdx;
int IF;
int Pol;
double JD;
double *AC;
} AutoCorrelation;
// int NtotAnt, NtotSou;
// double *BaseLine[3], *SinDec, *CosDec, *AntLon, *TanLat, **BasNum;
// double *ParAngs[2];
/* Class to read FITS-IDI or SWIN files, setup the data streams,
and iterate over all the baselines with mixed polarization. */
class DataIO {
public:
~DataIO();
DataIO();
int getNfreqs();
int getNant();
int getNchan(int freqid);
long getMixedNvis();
bool succeed();
double getDay0();
void getFrequencies(double* Freqarray);
// Compute parallactic angle.
void getParAng(int sidx, int Ant1, int Ant2, double*UVW, double &P1, double &P2);
// Estimate amplitude ratios from the autocorrelations:
std::complex<float> getAmpRatio(int ant, int spw, int chan);
// Set the current IF (and reset the mixed-vis. counter):
virtual bool setCurrentIF(int i) = 0;
/* Very important function. Finds the next combination of the 4 correlation
products. Returns the visibilities as an array of pointers;
It also returns the time of the visibility and the ids of the antennas in the baseline.
If more than one lin-pol antenna are present, this function will still work, and will
return the pure-linear visibilities twice, one iteration for each antenna (the same is
true for the auto-correlations of each lin-pol antenna).
Returns false if no more mixed-pol visibilities are found for the corresponding IF. */
virtual bool getNextMixedVis(double &JDTime, int &antenna, int &otherAnt, bool &conj, int &calField) = 0;
/* Complementary to the function above. Once the visibilities have been
corrected, this function puts them back into the right place. */
virtual bool setCurrentMixedVis() = 0;
// Modify the visibilities read by "getNextMixedVis" by the calibration matrix supplied
// Saves the result in the "bufferVis" pointer
virtual void applyMatrix(std::complex<float> *M[2][2], bool swap, bool print, int thisAnt, FILE *plotFile) = 0;
// Flag bad (unconvertable) data:
virtual void zeroWeight() = 0;
// Close all files.
virtual void finish() = 0;
static const int MAXIF = 256;
FreqSetup *Freqs;
ArrayGeometry *Geometry;
AutoCorrelation *AutoCorrs;
float ***averAutocorrs;
double *Freqvals[MAXIF], *doRange, *JDTimes;
int *Basels, *Freqids, *an1, *an2, *linAnts, *field; //, *sour;
double *ParAng[2];
int NLinAnt, NIFs, Nband, status, Nants, Nfreqs, currFreq;
long NLinVis, Nvis, currVis, *indexes;
bool success, currConj;
bool *conjugate, *is1, *is2, *is1orig, *is2orig;
int Flux, *NAV;
int nautos = 0;
double day0;
};
#endif
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