SSBtimes.h

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/*
 *  Copyright (C) 2009 Chris Messenger
 *  Copyright (C) 2005 Reinhard Prix
 *
 *  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 with program; see the file COPYING. If not, write to the
 *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *  MA  02110-1301  USA
 */
#ifndef _SSBTIMES_H  /* Double-include protection. */
#define _SSBTIMES_H
 
#ifdef  __cplusplus
extern "C" {
#endif
 
/**
 * \defgroup SSBtimes_h Header SSBtimes.h
 * \ingroup lalpulsar_coh
 * \author Reinhard Prix
 * \date 2005
 * \brief Functions for working with SSB times.
 */
/** @{ */
 
/*---------- exported INCLUDES ----------*/
#include <lal/LALStdlib.h>
#include <lal/UserInputParse.h>
#include <lal/PulsarDataTypes.h>
#include <lal/DetectorStates.h>
 
/*---------- exported types ----------*/
 
/** The precision in calculating the barycentric transformation */
typedef enum tagSSBprecision {
  SSBPREC_NEWTONIAN,            /**< simple Newtonian: \f$ \tau = t + \vec{r}\cdot\vec{n}/c \f$ */
  SSBPREC_RELATIVISTIC,         /**< detailed relativistic: \f$ \tau=\tau(t; \vec{n}, \vec{r}) \f$ */
  SSBPREC_RELATIVISTICOPT,      /**< optimized relativistic, numerically equivalent to #SSBPREC_RELATIVISTIC, but faster */
  SSBPREC_DMOFF,                /**< switch off all demodulatoin terms */
  SSBPREC_LAST                  /**< end marker */
} SSBprecision;
 
/** Static array of all \c SSBprecision choices, for use by the UserInput module parsing routines */
extern const UserChoices SSBprecisionChoices;
 
/** Simple container for two REAL8-vectors, namely the SSB-timings DeltaT_alpha  and Tdot_alpha,
 * with one entry per SFT-timestamp. These are required input for XLALNewDemod().
 * We also store the SSB reference-time tau0.
 */
typedef struct tagSSBtimes {
  LIGOTimeGPS refTime;          /**< reference-time 'tau0' */
  REAL8Vector *DeltaT;          /**< Time-difference of SFT-alpha - tau0 in SSB-frame */
  REAL8Vector *Tdot;            /**< dT/dt : time-derivative of SSB-time wrt local time for SFT-alpha */
} SSBtimes;
 
/** Multi-IFO container for SSB timings */
typedef struct tagMultiSSBtimes {
  UINT4 length;         /**< number of IFOs */
  SSBtimes **data;      /**< array of SSBtimes (pointers) */
} MultiSSBtimes;
 
/*---------- exported Global variables ----------*/
 
/*---------- exported prototypes [API] ----------*/
int XLALAddBinaryTimes( SSBtimes **tSSBOut, const SSBtimes *tSSBIn, const PulsarDopplerParams *Doppler );
int XLALAddMultiBinaryTimes( MultiSSBtimes **multiSSBOut, const MultiSSBtimes *multiSSBIn, const PulsarDopplerParams *Doppler );
SSBtimes *XLALDuplicateSSBtimes( const SSBtimes *tSSB );
MultiSSBtimes *XLALDuplicateMultiSSBtimes( const MultiSSBtimes *multiSSB );
 
SSBtimes *XLALGetSSBtimes( const DetectorStateSeries *DetectorStates, SkyPosition pos, LIGOTimeGPS refTime, SSBprecision precision );
MultiSSBtimes *XLALGetMultiSSBtimes( const MultiDetectorStateSeries *multiDetStates, SkyPosition skypos, LIGOTimeGPS refTime, SSBprecision precision );
 
int XLALEarliestMultiSSBtime( LIGOTimeGPS *out, const MultiSSBtimes *multiSSB, const REAL8 Tsft );
int XLALLatestMultiSSBtime( LIGOTimeGPS *out, const MultiSSBtimes *multiSSB,  const REAL8 Tsft );
 
/* destructors */
void XLALDestroySSBtimes( SSBtimes *multiSSB );
void XLALDestroyMultiSSBtimes( MultiSSBtimes *multiSSB );
 
/** @} */
 
#ifdef  __cplusplus
}
#endif
/* C++ protection. */
 
#endif  /* Double-include protection. */