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CalTable.cpp
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/* CALTABLE - calibration table interface to PolConvert
Copyright (C) 2013-2022 Ivan Marti-Vidal
Nordic Node of EU ALMA Regional Center (Onsala, Sweden)
Max-Planck-Institut fuer Radioastronomie (Bonn, Germany)
University of Valencia (Spain)
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 <math.h>
#include <iostream>
#include <fstream>
#include <cstring>
#include "./CalTable.h"
#define PI 3.141592653589793
#define TWOPI 6.283185307179586
#include <complex>
CalTable::~CalTable() {};
// Consturctor for dummy calibration table.
// If Nants<0, the table is considered "dummy".
CalTable::CalTable(int kind, FILE *logF){
Nants=-1;Nchan=1;logFile = logF;
isDelay = kind==1;
isDterm = kind==2;
isTsys = kind==3;
JDRange[0] = 0.; JDRange[1]=1.e20;
gainChanged = true;
Freqs = new double[1]; Freqs[0] = 1.0;
Time = new double*[1];
Time[0] = new double[1]; Time[0][0] = 1.0;
Verbose = false;
};
// Constructor for normal calibration table.
CalTable::CalTable(int kind, double **R1, double **P1,double **R2,double **P2,
double *freqs, double **times, int Na, long *Nt, long Nc,
bool **flag, bool islinear, FILE *logF, bool verbose)
{
// Initiate variables and declare auxiliary variables:
Nchan = Nc;
Nants = Na;
logFile = logF ;
Verbose = verbose;
isLinear = islinear;
// isTsys = istsys;
firstTime = new bool[Nants];
isDelay = kind==1;
isDterm = kind==2;
isTsys = kind==3;
gainChanged = true;
Ntimes = new long[Nants];
std::memcpy(Ntimes,Nt,sizeof(long)*Nants);
Time = new double*[Nants];
flags = new bool*[Nants];
int ia;
for (ia=0; ia<Nants; ia++){
firstTime[ia] = true;
Time[ia] = new double[Ntimes[ia]];
flags[ia] = new bool[Ntimes[ia]*Nchan];
std::memcpy(Time[ia],times[ia],sizeof(double)*Ntimes[ia]);
std::memcpy(flags[ia],flag[ia],sizeof(bool)*Ntimes[ia]*Nchan);
};
Freqs = new double[Nchan];
std::memcpy(Freqs,freqs,sizeof(double)*Nchan);
long i, j, k, auxI;
JDRange[1] = 0.0;
JDRange[0] = 1.e20;
GainAmp[0] = new double**[Nants];
GainAmp[1] = new double**[Nants];
GainPhase[0] = new double**[Nants];
GainPhase[1] = new double**[Nants];
for (i=0; i<Nants; i++){
if (Time[i][0]<JDRange[0]){JDRange[0] = Time[i][0];};
if (Time[i][Ntimes[i]-1]>JDRange[1]){JDRange[1] = Time[i][Ntimes[i]-1];};
GainAmp[0][i] = new double*[Nchan];
GainAmp[1][i] = new double*[Nchan];
GainPhase[0][i] = new double*[Nchan];
GainPhase[1][i] = new double*[Nchan];
for (j=0; j<Nchan; j++) {
GainAmp[0][i][j] = new double[Ntimes[i]];
GainAmp[1][i][j] = new double[Ntimes[i]];
GainPhase[0][i][j] = new double[Ntimes[i]];
GainPhase[1][i][j] = new double[Ntimes[i]];
for (k=0; k<Ntimes[i]; k++){
auxI = j*Ntimes[i]+k;
GainAmp[0][i][j][k] = R1[i][auxI];
GainAmp[1][i][j][k] = R2[i][auxI];
GainPhase[0][i][j][k] = P1[i][auxI];
GainPhase[1][i][j][k] = P2[i][auxI];
};
};
};
if (Nchan>1) {
SignFreq = (Freqs[1]>Freqs[0]);
} else {
SignFreq = true; // arbitrary; with Nchan<=1 no interpolateable list of freqs, and Nchan==1 anyway a special case in fillGaps()
}
fillGaps();
// Set default channel mapping to 1->1:
preKt = new double[Nants];
pret0 = new long[Nants];
pret1 = new long[Nants];
currTime = -1.0;
bufferGain[0] = new std::complex<float>*[Nants];
bufferGain[1] = new std::complex<float>*[Nants];
for (auxI=0;auxI<Nants;auxI++) {
pret0[auxI] = 0;
pret1[auxI] = 0;
preKt[auxI] = -1.0;
bufferGain[0][auxI] = new std::complex<float>[Nchan];
bufferGain[1][auxI] = new std::complex<float>[Nchan];
};
K0 = new double[Nchan];
I0 = new long[Nchan];
I1 = new long[Nchan];
MSChan = Nchan;
for (auxI = 0; auxI<Nchan; auxI++) {
K0[auxI] = 1.0;
I0[auxI] = auxI;
I1[auxI] = 0;
};
};
// Is this a bandpass gain or a time gain?
bool CalTable::isBandpass() {
return Nchan>1;
};
// Interpolate failed frequency channels of each antenna and for each time:
void CalTable::fillGaps() {
int ant;
long tidx, chan, index;
long auxI, auxI2;
double frchan;
bool firstflag = false;
bool allflagged = true;
auxI = -1; // If all channels are flagged, no interpolation is done.
/*
//////////////////////
// DEBUGGING CODE
FILE *gainFile = fopen("GAINS.ASSESS.B4","ab");
fwrite(&Nchan,sizeof(int),1,gainFile);
for (chan=0; chan<Nchan; chan++) {
fwrite(&GainAmp[0][0][chan][0],sizeof(double),1,gainFile);
fwrite(&GainAmp[1][0][chan][0],sizeof(double),1,gainFile);
fwrite(&GainPhase[0][0][chan][0],sizeof(double),1,gainFile);
fwrite(&GainPhase[1][0][chan][0],sizeof(double),1,gainFile);
fwrite(&flags[0][chan*Ntimes[0]+0],sizeof(bool),1,gainFile);
};
fclose(gainFile);
//////////////////////
*/
if (Nchan==1){
for (ant=0; ant<Nants; ant++) {
allflagged = true;
for (tidx=0; tidx<Ntimes[ant]; tidx++) { if(!flags[ant][tidx]){allflagged=false;break;};};
if (allflagged){
sprintf(message,"\nWARNING: ALMA ANTENNA #%i HAS ALL ITS TIMES FLAGGED!\n",ant);
fprintf(logFile,"%s",message);
sprintf(message,"SETTING ITS GAIN TO ZERO. CHECK RESULTS CAREFULLY!\n\n");
fprintf(logFile,"%s",message);
fflush(logFile);
for (tidx=0; tidx<Ntimes[ant]; tidx++) {
if(isDterm){
GainAmp[0][ant][0][tidx] = 0.0;
GainAmp[1][ant][0][tidx] = 0.0;
} else {
GainAmp[0][ant][0][tidx] = 0.0;
GainAmp[1][ant][0][tidx] = 0.0;
};
GainPhase[0][ant][0][tidx] = 0.0;
GainPhase[1][ant][0][tidx] = 0.0;
flags[ant][tidx] = false;
};
};
// Determine first unflagged time:
for (tidx=0; tidx<Ntimes[ant]; tidx++) {
if (!flags[ant][tidx]){auxI=tidx;break;};}; //REVISAR
// Fill the first flagged channels:
for (index=0; index<auxI; index++){
GainAmp[0][ant][0][index] = GainAmp[0][ant][0][auxI];
GainAmp[1][ant][0][index] = GainAmp[1][ant][0][auxI];
GainPhase[0][ant][0][index] = GainPhase[0][ant][0][auxI];
GainPhase[1][ant][0][index] = GainPhase[1][ant][0][auxI];
flags[ant][index] = false; // REVISAR
};
// Determine last unflagged channel
for (tidx=Ntimes[ant]-1; tidx>=0; tidx --) {
if (!flags[ant][tidx]){auxI=tidx;break;};
}; // REVISAR
// Fill the last flagged channels:
for (index=auxI+1; index<Ntimes[ant]; index++){ // REVISAR
GainAmp[0][ant][0][index] = GainAmp[0][ant][0][auxI];
GainAmp[1][ant][0][index] = GainAmp[1][ant][0][auxI];
GainPhase[0][ant][0][index] = GainPhase[0][ant][0][auxI];
GainPhase[1][ant][0][index] = GainPhase[1][ant][0][auxI];
flags[ant][index] = false; // REVISAR
};
// Look for flagged time ranges and interpolate them:
firstflag = false;
for (tidx=0; tidx<Ntimes[ant]; tidx++) {
if (!firstflag && flags[ant][tidx]){firstflag = true; auxI=tidx-1;}; // REVISAR
if (firstflag && !flags[ant][tidx]){
firstflag = false;
for (auxI2=auxI+1; auxI2<tidx; auxI2++) {
frchan = ((double) (auxI2-auxI))/((double) (tidx-auxI));
GainAmp[0][ant][0][auxI2] = GainAmp[0][ant][0][tidx]*frchan;
GainAmp[0][ant][0][auxI2] += GainAmp[0][ant][0][auxI]*(1.-frchan);
GainAmp[1][ant][0][auxI2] = GainAmp[1][ant][0][tidx]*frchan;
GainAmp[1][ant][0][auxI2] += GainAmp[1][ant][0][auxI]*(1.-frchan);
GainPhase[0][ant][0][auxI2] = GainPhase[0][ant][0][tidx]*frchan;
GainPhase[0][ant][0][auxI2] += GainPhase[0][ant][0][auxI]*(1.-frchan);
GainPhase[1][ant][0][auxI2] = GainPhase[1][ant][0][tidx]*frchan;
GainPhase[1][ant][0][auxI2] += GainPhase[1][ant][0][auxI]*(1.-frchan);
flags[ant][auxI2] = false; // REVISAR
};
};
};
};
};
if (Nchan>1) {
for (ant=0; ant<Nants; ant++) {
for (tidx=0; tidx<Ntimes[ant]; tidx++) {
index = tidx; // REVISAR
for (chan=0; chan<Nchan; chan ++) {
if(!flags[ant][chan*Ntimes[ant]+index]){allflagged=false;}; // REVISAR
};
if (allflagged){
sprintf(message,"\nWARNING: ALMA ANTENNA #%i HAS ALL CHANNELS FLAGGED AT TIME #%li\n",ant,tidx);
fprintf(logFile,"%s",message);
sprintf(message,"SETTING ITS GAIN TO DUMMY. CHECK RESULTS CAREFULLY!\n\n");
fprintf(logFile,"%s",message);
fflush(logFile);
for (chan=0; chan<Nchan; chan ++) {
if(isDterm){
GainAmp[0][ant][chan][tidx] = 0.0;
GainAmp[1][ant][chan][tidx] = 0.0;
} else {
GainAmp[0][ant][chan][tidx] = 1.0;
GainAmp[1][ant][chan][tidx] = 1.0;
};
GainPhase[0][ant][chan][tidx] = 0.0;
GainPhase[1][ant][chan][tidx] = 0.0;
flags[ant][chan*Ntimes[ant]+index] = false;
};
};
// POLARIZATION-WISE:
// Determine first unflagged channel
for (chan=0; chan<Nchan; chan ++) {
if (!flags[ant][chan*Ntimes[ant]+index]){auxI=chan;break;};
}; //REVISAR
// Fill the first flagged channels:
for (chan=0; chan<auxI; chan++){
GainAmp[0][ant][chan][tidx] = GainAmp[0][ant][auxI][tidx];
GainAmp[1][ant][chan][tidx] = GainAmp[1][ant][auxI][tidx];
GainPhase[0][ant][chan][tidx] = GainPhase[0][ant][auxI][tidx];
GainPhase[1][ant][chan][tidx] = GainPhase[1][ant][auxI][tidx];
flags[ant][chan*Ntimes[ant]+index] = false; // REVISAR
};
// Determine last unflagged channel
for (chan=Nchan-1; chan>=0; chan --) {
if (!flags[ant][chan*Ntimes[ant]+index]){auxI=chan;break;};
}; // REVISAR
// Fill the last flagged channels:
for (chan=auxI+1; chan<Nchan; chan++){ // REVISAR
GainAmp[0][ant][chan][tidx] = GainAmp[0][ant][auxI][tidx];
GainAmp[1][ant][chan][tidx] = GainAmp[1][ant][auxI][tidx];
GainPhase[0][ant][chan][tidx] = GainPhase[0][ant][auxI][tidx];
GainPhase[1][ant][chan][tidx] = GainPhase[1][ant][auxI][tidx];
flags[ant][chan*Ntimes[ant]+index] = false; // REVISAR
};
// Look for flagged regions within the band and interpolate them:
firstflag = false;
for (chan=0; chan<Nchan; chan++) {
if (!firstflag && flags[ant][chan*Ntimes[ant]+index]){
firstflag = true; auxI=chan-1;
}; // REVISAR
if (firstflag && !flags[ant][chan*Ntimes[ant]+index]){
firstflag = false;
for (auxI2=auxI+1; auxI2<chan; auxI2++) {
frchan = ((double) (auxI2-auxI))/((double) (chan-auxI));
GainAmp[0][ant][auxI2][tidx] = GainAmp[0][ant][chan][tidx]*frchan;
GainAmp[0][ant][auxI2][tidx] += GainAmp[0][ant][auxI][tidx]*(1.-frchan);
GainAmp[1][ant][auxI2][tidx] = GainAmp[1][ant][chan][tidx]*frchan;
GainAmp[1][ant][auxI2][tidx] += GainAmp[1][ant][auxI][tidx]*(1.-frchan);
GainPhase[0][ant][auxI2][tidx] = GainPhase[0][ant][chan][tidx]*frchan;
GainPhase[0][ant][auxI2][tidx] += GainPhase[0][ant][auxI][tidx]*(1.-frchan);
GainPhase[1][ant][auxI2][tidx] = GainPhase[1][ant][chan][tidx]*frchan;
GainPhase[1][ant][auxI2][tidx] += GainPhase[1][ant][auxI][tidx]*(1.-frchan);
flags[ant][auxI2*Ntimes[ant]+index] = false; // REVISAR
};
};
};
};
};
};
/*
//////////////////////
// DEBUGGING CODE
FILE *gainFile2 = fopen("GAINS.ASSESS","ab");
fwrite(&Nchan,sizeof(int),1,gainFile2);
for (chan=0; chan<Nchan; chan++) {
fwrite(&GainAmp[0][0][chan][0],sizeof(double),1,gainFile2);
fwrite(&GainAmp[1][0][chan][0],sizeof(double),1,gainFile2);
fwrite(&GainPhase[0][0][chan][0],sizeof(double),1,gainFile2);
fwrite(&GainPhase[1][0][chan][0],sizeof(double),1,gainFile2);
fwrite(&flags[0][chan*Ntimes[0]+0],sizeof(bool),1,gainFile2);
};
fclose(gainFile2);
//////////////////////
*/
return;
};
// Simple self-explanatory methods:
int CalTable::getNant() {if(Nants<0){return 1;} else {return Nants;};};
long CalTable::getNchan() {long ret=Nchan; return ret;};
long CalTable::getNEntries(int ant) {if(Nants<0){return 1;} else {return Ntimes[ant];};};
void CalTable::getTimeRange(double *JD) {JD[0] = JDRange[0];JD[1]=JDRange[1];};
void CalTable::setChanged(bool ch){gainChanged = ch;};
void CalTable::getFreqRange(double *Fr) {
if(Freqs[0]<Freqs[Nchan-1]){
Fr[0] = Freqs[0]; Fr[1] = Freqs[Nchan-1];
} else {
Fr[1] = Freqs[0]; Fr[0] = Freqs[Nchan-1];
};
};
// Freqs arrays are protected. Copy them to memory block out of instance:
void CalTable::getFrequencies(double *freqs) {
std::memcpy(freqs,Freqs,sizeof(double)*Nchan);
};
// Time arrays are protected. Copy them to memory block out of instance:
void CalTable::getTimes(int ant, double *times) {
std::memcpy(times,Time[ant],sizeof(double)*Ntimes[ant]);
// printf("TIMES: %.8e - %.8e\n",Time[ant][0],times[0]);
};
// Similar to above (i.e., the Table gains are protected):
void CalTable::getGains(int ant, long timeidx, double *gain[4])
{
if(Nants<0){return;};
long i;
for (i=0; i< Nchan; i++) {
gain[0][i] = GainAmp[0][ant][i][timeidx];
gain[1][i] = GainAmp[1][ant][i][timeidx];
gain[2][i] = GainPhase[0][ant][i][timeidx];
gain[3][i] = GainPhase[1][ant][i][timeidx];
};
};
/* Prepares the instance for the frequency interpolation. User must provide
the array of frequencies to interpolate to (*freqs) and the number
of channels in that array (mschan). */
void CalTable::setMapping(long mschan, double *freqs)
{
if(Nants<0){return;};
gainChanged = true;
currTime = -1.0;
long i, auxI;
delete[] K0;
delete[] I0;
delete[] I1;
for (i=0; i<Nants; i++) {
preKt[i] = -1.0 ;
delete[] bufferGain[0][i];
delete[] bufferGain[1][i];
bufferGain[0][i] = new std::complex<float>[mschan];
bufferGain[1][i] = new std::complex<float>[mschan];
};
deltaNu = ((freqs[1]-freqs[0])/1.e9);
deltaNu0 = ((freqs[0]-Freqs[0])/1.e9);
K0 = new double[mschan];
I0 = new long[mschan];
I1 = new long[mschan];
MSChan = mschan;
double mmod;
if (SignFreq && Nchan>=1) {
for (i=0; i<mschan; i++) {
if (freqs[i] <= Freqs[0]){
I0[i]=0; I1[i] = 0;
K0[i] = 1.0;}
else if (freqs[i] >= Freqs[Nchan-1]){
I0[i]=Nchan-1; I1[i] = 0;
K0[i] = 1.0;}
else {
for (auxI=Nchan-1; auxI>=0; auxI--) {
if (freqs[i] >= Freqs[auxI]) {
I0[i] = auxI;
I1[i] = auxI+1;
mmod = Freqs[auxI+1]-Freqs[auxI];
K0[i] = (1.0-(freqs[i]-Freqs[auxI])/mmod);
break;
};
};
};
};
} else if(Nchan>=1) {
for (i=0; i<mschan; i++) {
if (freqs[i] >= Freqs[0]){
I0[i]=0; I1[i] = 0;
K0[i] = 1.0;}
else if (freqs[i] <= Freqs[Nchan-1]){
I0[i]=Nchan-1; I1[i] = 0;
K0[i] = 1.0;}
else {
for (auxI=Nchan-1; auxI>=0; auxI--) {
if (freqs[i] <= Freqs[auxI]) {
I0[i] = auxI;
I1[i] = auxI+1;
mmod = Freqs[auxI+1]-Freqs[auxI];
K0[i] = (1.0-(freqs[i]-Freqs[auxI])/mmod);
break;
};
};
};
};
} else {
if (Verbose){
printf("Undefined Behaviour: setMapping() with input mschan=%ld for interpolation, but CalTable was set up with Nchan=%ld < 1\n",mschan,Nchan);
fflush(stdout);
};
};
};
bool CalTable::setInterpolationTime(double itime) {
if (Verbose){printf("Set interpolation at time %.3f for %i antennas \n",itime,Nants);fflush(stdout);};
if (itime == currTime) {gainChanged = false; return gainChanged;};
if(Nants<0){gainChanged = currTime>0.0; currTime=itime; return gainChanged;};
long i; //, auxI;
long ti0 = 0;
long ti1 = 0;
double Kt = 0.0;
long Nts;
double auxD, auxD2;
int iant;
gainChanged = false;
// Find the right time interpolation:
for (iant=0; iant<Nants; iant++) {
Nts = Ntimes[iant];
if (Verbose){
printf("Ant %i has %li times \n",iant,Nts); fflush(stdout);
};
if (Nts == 1) {
pret0[iant] = 0;
pret1[iant] = 0;
if (preKt[iant]<0.0){gainChanged=true;};
preKt[iant] = 1.0;
} else {
if (itime<=Time[iant][0]) {
ti0 = 0; ti1 = 0; Kt = 1.0;}
else if (itime>=Time[iant][Nts-1]) {
ti0 = Nts-1; ti1 = 0; Kt = 1.0;}
else {
for (i=Nts-1; i>=0; i--) {
if (itime>Time[iant][i]) {
ti1 = i+1;
ti0 = i;
auxD = Time[iant][i];
auxD2 = Time[iant][i+1];
if (isLinear){
Kt = (1.0 - (itime - auxD)/(auxD2-auxD));
} else {
Kt = 1.0;
};
break;
};
};
};
pret0[iant] = ti0;
pret1[iant] = ti1;
preKt[iant] = Kt;
gainChanged = true;
};
};
if (Verbose){
printf("%li %li %.3f\n",ti0, ti1, Kt);fflush(stdout);
};
currTime = itime;
return gainChanged;
};
/* Interpolates the gains of an antenna (iant) at a given time, itime,
and applies them to the arrays re[2] and im[2] (elements of these arrays
are the different polarizations (X,Y)). User should have run "setMapping" before,
in case that the table channel frequencies do not match with the array of frequencies
where the interpolation is desired.
Then, if mode==0, the gains are just written in re and im.
If mode==1, the gains are ADDED to the already-existing values in re and im.
If mode==2, the gains are MULTIPLIED to the already-existing values in re and im.
-------------------
*/
void CalTable::applyInterpolation(int iant, int mode, std::complex<float> *gain[2]) {
long i;
long ti0, ti1;
double auxD;
double Kt, Kt2;
double auxF0, auxF1, auxF2, auxF3, auxT0, auxT1, auxT2, auxT3;
if (Verbose){printf("Apply interpolation for antenna %i\n",iant);fflush(stdout);};
if(Nants<0){return;};
ti0 = pret0[iant];
ti1 = pret1[iant];
Kt = preKt[iant];
Kt2 = 1.0-Kt;
if (Verbose){printf("indexes: %li %li - %.3f\n",ti0, ti1, Kt);fflush(stdout);};
// Interpolate in frequency (first) and time (second):
if (gainChanged || firstTime[iant]) {
firstTime[iant]=false;
// if (true) {
for (i=0; i<MSChan; i++) {
auxF0 = GainAmp[0][iant][I0[i]][ti0]*K0[i];
auxF1 = GainAmp[1][iant][I0[i]][ti0]*K0[i];
auxF2 = GainPhase[0][iant][I0[i]][ti0]*K0[i];
auxF3 = GainPhase[1][iant][I0[i]][ti0]*K0[i];
if (I1[i] >0) {
auxF0 += GainAmp[0][iant][I1[i]][ti0]*(1.-K0[i]);
auxF1 += GainAmp[1][iant][I1[i]][ti0]*(1.-K0[i]);
auxF2 += GainPhase[0][iant][I1[i]][ti0]*(1.-K0[i]);
auxF3 += GainPhase[1][iant][I1[i]][ti0]*(1.-K0[i]);
};
if (ti1 > 0) {
auxT0 = GainAmp[0][iant][I0[i]][ti1]*K0[i];
auxT1 = GainAmp[1][iant][I0[i]][ti1]*K0[i];
auxT2 = GainPhase[0][iant][I0[i]][ti1]*K0[i];
auxT3 = GainPhase[1][iant][I0[i]][ti1]*K0[i];
if (I1[i] >0) {
auxT0 += GainAmp[0][iant][I1[i]][ti1]*(1.-K0[i]);
auxT1 += GainAmp[1][iant][I1[i]][ti1]*(1.-K0[i]);
auxT2 += GainPhase[0][iant][I1[i]][ti1]*(1.-K0[i]);
auxT3 += GainPhase[1][iant][I1[i]][ti1]*(1.-K0[i]);
};
auxF0 = auxF0*Kt+auxT0*Kt2;
auxF1 = auxF1*Kt+auxT1*Kt2;
auxF2 = auxF2*Kt+auxT2*Kt2;
auxF3 = auxF3*Kt+auxT3*Kt2;
};
if (isDelay){
auxD = TWOPI*(((double)i + 0.5)*deltaNu+deltaNu0);
bufferGain[0][iant][i] = (std::complex<float>) std::polar(1.0,auxF0*auxD);
bufferGain[1][iant][i] = (std::complex<float>) std::polar(1.0,auxF1*auxD);
} else if (isTsys) {
bufferGain[0][iant][i].real(1./sqrt(auxF0));
bufferGain[0][iant][i].imag(0.0);
bufferGain[1][iant][i].real(1./sqrt(auxF1));
bufferGain[1][iant][i].imag(0.0);
} else if (isDterm) {
bufferGain[0][iant][i].real(auxF0);
bufferGain[0][iant][i].imag(auxF2);
bufferGain[1][iant][i].real(auxF1);
bufferGain[1][iant][i].imag(auxF3);
} else {
bufferGain[0][iant][i] = (std::complex<float>) std::polar(auxF0,auxF2);
bufferGain[1][iant][i] = (std::complex<float>) std::polar(auxF1,auxF3);
};
};
}; // Comes from if(gainChanged)
switch (mode) {
case 0: // Normal mode.
for (i=0; i< MSChan; i++) {
gain[0][i] = bufferGain[0][iant][i];
gain[1][i] = bufferGain[1][iant][i];
};
break;
case 1: // Addition mode.
for (i=0; i< MSChan; i++) {
gain[0][i] += bufferGain[0][iant][i];
gain[1][i] += bufferGain[1][iant][i];
};
break;
case 2: // Product mode.
for (i=0; i< MSChan; i++) {
gain[0][i] *= bufferGain[0][iant][i];
gain[1][i] *= bufferGain[1][iant][i];
};
break;
};
};
bool CalTable::getInterpolation(int iant, int ichan, std::complex<float> gain[2]){
success = true;
if(Nants<0){
if(isDterm){gain[0]=0.0; gain[1]=0.0;} else {gain[0]=1.0;gain[1]=1.0;};
return success;
};
if(iant>=Nants || ichan > Nchan){
success = false;
gain[0] = 1.0 ; gain[1] = 1.0;
} else {
gain[0] = bufferGain[0][iant][ichan];
gain[1] = bufferGain[1][iant][ichan];
success = true;
};
return success;
};
// eof