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/* $Id: vmifuflat.c,v 1.2 2013-03-25 11:43:04 cgarcia Exp $
*
* This file is part of the VIMOS Pipeline
* Copyright (C) 2002-2004 European Southern Observatory
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* $Author: cgarcia $
* $Date: 2013-03-25 11:43:04 $
* $Revision: 1.2 $
* $Name: not supported by cvs2svn $
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <pilmemory.h>
#include <pilmessages.h>
#include <piltranslator.h>
#include "vmtable.h"
#include "vmextractiontable.h"
#include "vmifuflat.h"
#define EXTRA 20.
/**
* @brief vmifuflat IFU Flat Fields
*
* The module provides the IFU flat field related functions
*/
/**@{*/
VimosBool
determineExposedIfuArea(VimosTable *adf,VimosExtractionTable *extTable,
int *nSlits, VimosDpoint **minY, VimosDpoint **maxY,
VimosDpoint **zeroY)
{
const char modName[] = "determineExposedIfuArea";
int nPixBelow;
int nPixAbove;
float ySlit;
float yZero;
char comment[80];
VimosExtractionSlit *exSlit;
/* validate input */
if (extTable == NULL) {
pilMsgError(modName, "NULL input table");
return (VM_FALSE);
}
exSlit = extTable->slits;
if (!determineExposedIfuSlit(adf, exSlit, &ySlit, &yZero)) {
pilMsgError(modName, "Function determineExposedIfuSlit returned an error");
return(VM_FALSE);
}
*nSlits = 1;
*minY = newDpoint(*nSlits);
if (*minY == NULL) {
pilMsgError(modName, "The function newDpoint has returned NULL");
return(VM_FALSE);
}
*maxY = newDpoint(*nSlits);
if (*maxY == NULL) {
pilMsgError(modName, "The function newDpoint has returned NULL");
return(VM_FALSE);
}
*zeroY = newDpoint(*nSlits);
if (*zeroY == NULL) {
pilMsgError(modName, "The function newDpoint has returned NULL");
return(VM_FALSE);
}
if (!readIntDescriptor(extTable->descs, "ESO PRO SPECT LLEN LO", &nPixBelow,
comment)) {
pilMsgError(modName, "Function readIntDescriptor has returned an error");
return(VM_FALSE);
}
if (!readIntDescriptor(extTable->descs, "ESO PRO SPECT LLEN HI", &nPixAbove,
comment)) {
pilMsgError(modName, "Function readIntDescriptor has returned an error");
return(VM_FALSE);
}
(*minY)->x = 0.;
(*minY)->y = (double) (ySlit - nPixBelow - EXTRA);
(*maxY)->y = (double) (ySlit + nPixAbove + EXTRA);
(*zeroY)->y = (double) (ySlit + yZero);
return VM_TRUE;
}
VimosBool
determineExposedIfuSlit(VimosTable *adf, VimosExtractionSlit *exSlit,
float *ySlit, float *yZero)
{
const char modName[] = "determineExposedIfuSlit";
int i, j;
int quadNum;
float yMin;
float yMax;
int ifuSlit;
float ifuSlitY;
float ifuZeroY;
char comment[80];
/* find out the minimum and maximum y coordinate in the illuminated area */
if (readIntDescriptor(adf->descs, pilTrnGetKeyword("Quadrant"),
&quadNum, comment) == VM_FALSE) {
pilMsgError(modName, "Keyword %s not found", pilTrnGetKeyword("Quadrant"));
return VM_FALSE;
}
if (readFloatDescriptor(adf->descs, pilTrnGetKeyword("MshuPosH", quadNum),
&yMax, comment) == VM_FALSE) {
pilMsgError(modName, "Keyword %s not found",
pilTrnGetKeyword("MshuPosH", quadNum));
return VM_FALSE;
}
if (readFloatDescriptor(adf->descs, pilTrnGetKeyword("MshuPosL", quadNum),
&yMin, comment) == VM_FALSE) {
pilMsgError(modName, "Keyword %s not found",
pilTrnGetKeyword("MshuPosL", quadNum));
return VM_FALSE;
}
for (i = 0; i <= 3; i++) {
ifuSlit = exSlit->IFUslitNo;
ifuSlitY = 0.;
ifuZeroY = 0.;
j = 0;
while (exSlit->IFUslitNo == ifuSlit) {
ifuSlitY += exSlit->ccdY->data[0];
ifuZeroY += exSlit->zeroY->data[0];
j++;
exSlit = exSlit->next;
}
ifuSlitY /= (float) j;
ifuZeroY /= (float) j;
if (ifuSlitY > yMin && ifuSlitY < yMax) {
*ySlit = ifuSlitY;
*yZero = ifuZeroY;
return (VM_TRUE);
}
}
return (VM_FALSE);
}
/**@}*/
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