/** * \deprecated Use XLALGetDetectorStates() instead */ void LALGetDetectorStates (LALStatus *status, /**< pointer to LALStatus structure */ DetectorStateSeries **DetectorStates, /**< [out] series of DetectorStates */ const LIGOTimeGPSVector *timestamps, /**< array of GPS timestamps t_i */ const LALDetector *detector, /**< detector info */ const EphemerisData *edat, /**< ephemeris file data */ REAL8 tOffset /**< compute detector states at timestamps SHIFTED by tOffset */ ) { INITSTATUS(status); ASSERT ( DetectorStates != NULL, status, DETECTORSTATES_ENULL, DETECTORSTATES_MSGENULL); ASSERT ( *DetectorStates == NULL, status, DETECTORSTATES_ENONULL, DETECTORSTATES_MSGENONULL); ASSERT ( timestamps, status, DETECTORSTATES_ENULL, DETECTORSTATES_MSGENULL); ASSERT ( detector, status, DETECTORSTATES_ENULL, DETECTORSTATES_MSGENULL); ASSERT ( edat, status, DETECTORSTATES_ENULL, DETECTORSTATES_MSGENULL); /* call XLAL function */ DetectorStateSeries *ret = NULL; if ( ( ret = XLALGetDetectorStates ( timestamps, detector, edat, tOffset )) == NULL ) { XLALPrintError ("%s: XLALGetDetectorStates() failed with code=%d\n", __func__, xlalErrno ); ABORT ( status, DETECTORSTATES_EXLAL, DETECTORSTATES_MSGEXLAL ); } /* return result */ (*DetectorStates) = ret; RETURN (status); } /* LALGetDetectorStates() */
/** * Get the detector-time series for the given MultiLIGOTimeGPSVector. * NOTE: contrary to the deprecated XLALGetMultiDetectorStatesFromMultiSFTs() interface, this * function computes detector-states at the given timestamps shifted by tOffset * */ MultiDetectorStateSeries * XLALGetMultiDetectorStates( const MultiLIGOTimeGPSVector *multiTS, /**< [in] multi-IFO timestamps */ const MultiLALDetector *multiIFO, /**< [in] multi-IFO array holding detector info */ const EphemerisData *edat, /**< [in] ephemeris data */ REAL8 tOffset /**< [in] shift all timestamps by this amount */ ) { /* check input consistency */ if ( !multiIFO || !multiTS || !edat ) { XLALPrintError ("%s: invalid NULL input (multiIFO=%p, multiTS=%p or edat=%p)\n", __func__, multiIFO, multiTS, edat ); XLAL_ERROR_NULL ( XLAL_EINVAL ); } UINT4 numDetectors; numDetectors = multiIFO->length; if ( numDetectors != multiTS->length ) { XLALPrintError ("%s: inconsistent number of IFOs in 'multiIFO' (%d) and 'multiTS' (%d)\n", __func__, multiIFO->length, multiTS->length ); XLAL_ERROR_NULL ( XLAL_EINVAL ); } /* prepare return-structure */ MultiDetectorStateSeries *ret = NULL; if ( ( ret = LALCalloc ( 1, sizeof( *ret ) )) == NULL ) { XLALPrintError ("%s: LALCalloc ( 1, %zu ) failed\n", __func__, sizeof(*ret) ); XLAL_ERROR_NULL ( XLAL_ENOMEM ); } if ( ( ret->data = LALCalloc ( numDetectors, sizeof( *(ret->data) ) )) == NULL ) { XLALFree ( ret ); XLALPrintError ("%s: LALCalloc ( %d, %zu ) failed\n", __func__, numDetectors, sizeof(*(ret->data)) ); XLAL_ERROR_NULL ( XLAL_ENOMEM ); } ret->length = numDetectors; REAL8 t0=LAL_REAL4_MAX; REAL8 t1=0; REAL8 deltaT = multiTS->data[0]->deltaT; LIGOTimeGPS startTime = {0, 0}; /* loop over detectors */ UINT4 X; for ( X=0; X < numDetectors; X ++ ) { LIGOTimeGPSVector *tsX = multiTS->data[X]; const LALDetector *detX = &(multiIFO->sites[X]); if ( !tsX || !detX ) { XLALPrintError ("%s: invalid NULL data-vector tsX[%d] = %p, detX[%d] = %p\n", __func__, X, tsX, X, detX ); XLAL_ERROR_NULL ( XLAL_EINVAL ); } if ( multiTS->data[X]->deltaT != deltaT ) { XLALPrintError ("%s: inconsistent time-base multi-timeseries deltaT[%d]=%f != deltaT[0] = %f\n", __func__, X, multiTS->data[X]->deltaT, deltaT ); XLAL_ERROR_NULL ( XLAL_EINVAL ); } /* fill in the detector-state series for this detector */ if ( ( ret->data[X] = XLALGetDetectorStates ( tsX, detX, edat, tOffset )) == NULL ) { XLALPrintError ("%s: XLALGetDetectorStates() failed.\n", __func__ ); XLAL_ERROR_NULL ( XLAL_EFUNC ); } /* keep track of earliest/latest timestamp in order to determine total Tspan */ UINT4 numTS = tsX->length; REAL8 t0_X = XLALGPSGetREAL8( &tsX->data[0] ); REAL8 t1_X = XLALGPSGetREAL8( &tsX->data[numTS-1] ); if ( t0_X < t0 ) { t0 = t0_X; startTime = tsX->data[0]; } if ( t1_X > t1 ) t1 = t1_X; } /* for X < numDetectors */ ret->Tspan = t1 - t0 + deltaT; /* total time spanned by all SFTs */ ret->startTime = startTime; /* earliest start-time of observation */ return ret; } /* XLALGetMultiDetectorStates() */
int main(int argc, char *argv[]) { LALStatus status = blank_status; ConfigVariables XLAL_INIT_DECL(config); UserVariables_t XLAL_INIT_DECL(uvar); /* register user-variables */ XLAL_CHECK ( XLALInitUserVars ( &uvar ) == XLAL_SUCCESS, XLAL_EFUNC ); /* read cmdline & cfgfile */ BOOLEAN should_exit = 0; XLAL_CHECK( XLALUserVarReadAllInput( &should_exit, argc, argv ) == XLAL_SUCCESS, XLAL_EFUNC ); if ( should_exit ) { exit(1); } if ( uvar.version ) { XLALOutputVersionString ( stdout, lalDebugLevel ); exit(0); } /* basic setup and initializations */ XLAL_CHECK ( XLALInitCode( &config, &uvar, argv[0] ) == XLAL_SUCCESS, XLAL_EFUNC ); /* ----- allocate memory for AM-coeffs ----- */ AMCoeffs AMold, AMnew1, AMnew2; /**< containers holding AM-coefs computed by 3 different AM functions */ AMold.a = XLALCreateREAL4Vector ( 1 ); AMold.b = XLALCreateREAL4Vector ( 1 ); AMnew1.a = XLALCreateREAL4Vector ( 1 ); AMnew1.b = XLALCreateREAL4Vector ( 1 ); AMnew2.a = XLALCreateREAL4Vector ( 1 ); AMnew2.b = XLALCreateREAL4Vector ( 1 ); XLAL_CHECK ( AMold.a && AMold.b && AMnew1.a && AMnew1.b && AMnew2.a && AMnew2.a, XLAL_ENOMEM, "Failed to XLALCreateREAL4Vector ( 1 )\n" ); /* ----- get detector-state series ----- */ DetectorStateSeries *detStates = NULL; XLAL_CHECK ( (detStates = XLALGetDetectorStates ( config.timestamps, config.det, config.edat, 0 )) != NULL, XLAL_EFUNC ); /* ----- compute associated SSB timing info ----- */ SSBtimes *tSSB = XLALGetSSBtimes ( detStates, config.skypos, config.timeGPS, SSBPREC_RELATIVISTIC ); XLAL_CHECK ( tSSB != NULL, XLAL_EFUNC, "XLALGetSSBtimes() failed with xlalErrno = %d\n", xlalErrno ); /* ===== 1) compute AM-coeffs the 'old way': [used in CFSv1] ===== */ BarycenterInput XLAL_INIT_DECL(baryinput); AMCoeffsParams XLAL_INIT_DECL(amParams); EarthState earth; baryinput.site.location[0] = config.det->location[0]/LAL_C_SI; baryinput.site.location[1] = config.det->location[1]/LAL_C_SI; baryinput.site.location[2] = config.det->location[2]/LAL_C_SI; baryinput.alpha = config.skypos.longitude; baryinput.delta = config.skypos.latitude; baryinput.dInv = 0.e0; /* amParams structure to compute a(t) and b(t) */ amParams.das = XLALMalloc(sizeof(*amParams.das)); amParams.das->pSource = XLALMalloc(sizeof(*amParams.das->pSource)); amParams.baryinput = &baryinput; amParams.earth = &earth; amParams.edat = config.edat; amParams.das->pDetector = config.det; amParams.das->pSource->equatorialCoords.longitude = config.skypos.longitude; amParams.das->pSource->equatorialCoords.latitude = config.skypos.latitude; amParams.das->pSource->orientation = 0.0; amParams.das->pSource->equatorialCoords.system = COORDINATESYSTEM_EQUATORIAL; amParams.polAngle = 0; LAL_CALL ( LALComputeAM ( &status, &AMold, config.timestamps->data, &amParams), &status); XLALFree ( amParams.das->pSource ); XLALFree ( amParams.das ); /* ===== 2) compute AM-coeffs the 'new way' using LALNewGetAMCoeffs() */ LALGetAMCoeffs ( &status, &AMnew1, detStates, config.skypos ); if ( status.statusCode ) { XLALPrintError ("%s: call to LALGetAMCoeffs() failed, status = %d\n\n", __func__, status.statusCode ); XLAL_ERROR ( status.statusCode & XLAL_EFUNC ); } /* ===== 3) compute AM-coeffs the 'newer way' using LALNewGetAMCoeffs() [used in CFSv2] */ LALNewGetAMCoeffs ( &status, &AMnew2, detStates, config.skypos ); if ( status.statusCode ) { XLALPrintError ("%s: call to LALNewGetAMCoeffs() failed, status = %d\n\n", __func__, status.statusCode ); XLAL_ERROR ( status.statusCode & XLAL_EFUNC ); } /* ===== 4) use standalone version of the above [used in FstatMetric_v2] */ REAL8 a0,b0; if ( XLALComputeAntennaPatternCoeffs ( &a0, &b0, &config.skypos, &config.timeGPS, config.det, config.edat ) != XLAL_SUCCESS ) { XLALPrintError ("%s: XLALComputeAntennaPatternCoeffs() failed.\n", __func__ ); XLAL_ERROR ( XLAL_EFUNC ); } /* ==================== output the results ==================== */ printf ("\n"); printf ("----- Input parameters:\n"); printf ("tGPS = { %d, %d }\n", config.timeGPS.gpsSeconds, config.timeGPS.gpsNanoSeconds ); printf ("Detector = %s\n", config.det->frDetector.name ); printf ("Sky position: longitude = %g rad, latitude = %g rad [equatorial coordinates]\n", config.skypos.longitude, config.skypos.latitude ); printf ("\n"); printf ("----- Antenna pattern functions (a,b):\n"); printf ("LALComputeAM: ( %-12.8g, %-12.8g) [REAL4]\n", AMold.a->data[0], AMold.b->data[0] ); printf ("LALGetAMCoeffs: ( %-12.8g, %-12.8g) [REAL4]\n", AMnew1.a->data[0], AMnew1.b->data[0] ); printf ("LALNewGetAMCoeffs: ( %-12.8g, %-12.8g) [REAL4]\n", AMnew2.a->data[0]/config.sinzeta, AMnew2.b->data[0]/config.sinzeta ); printf ("XLALComputeAntennaPatternCoeffs: ( %-12.8g, %-12.8g) [REAL8]\n", a0/config.sinzeta, b0/config.sinzeta ); printf ("\n"); printf ("----- Detector & Earth state:\n"); REAL8 *pos = detStates->data[0].rDetector; printf ("Detector position [ICRS J2000. Units=sec]: rDet = {%g, %g, %g}\n", pos[0], pos[1], pos[2] ); REAL8 *vel = detStates->data[0].vDetector; printf ("Detector velocity [ICRS J2000. Units=c]: vDet = {%g, %g, %g}\n", vel[0], vel[1], vel[2] ); printf ("Local mean sideral time: LMST = %g rad\n", detStates->data[0].LMST); printf ("\n"); printf ("----- SSB timing data:\n"); printf ("TOA difference tSSB - tDet = %g s\n", tSSB->DeltaT->data[0] ); printf ("TOA rate of change dtSSB/dtDet - 1 = %g\n", tSSB->Tdot->data[0] - 1.0 ); printf ("\n\n"); /* ----- done: free all memory */ XLAL_CHECK ( XLALDestroyConfig( &config ) == XLAL_SUCCESS, XLAL_EFUNC ); XLALDestroyDetectorStateSeries ( detStates ); XLALDestroyREAL4Vector ( AMold.a ); XLALDestroyREAL4Vector ( AMold.b ); XLALDestroyREAL4Vector ( AMnew1.a ); XLALDestroyREAL4Vector ( AMnew1.b ); XLALDestroyREAL4Vector ( AMnew2.a ); XLALDestroyREAL4Vector ( AMnew2.b ); XLALDestroyREAL8Vector ( tSSB->DeltaT ); XLALDestroyREAL8Vector ( tSSB->Tdot ); XLALFree (tSSB); LALCheckMemoryLeaks(); return 0; } /* main */
/** * Simulate a pulsar signal to best accuracy possible. * \author Reinhard Prix * \date 2005 * * The motivation for this function is to provide functions to * simulate pulsar signals <em>with the best possible accuracy</em>, * i.e. using no approximations, contrary to LALGeneratePulsarSignal(). * * Obviously this is not meant as a fast code to be used in a Monte-Carlo * simulation, but rather as a <em>reference</em> to compare other (faster) * functions agains, in order to be able to gauge the quality of a given * signal-generation routine. * * We want to calculate \f$h(t)\f$, given by * \f[ * h(t) = F_+(t)\, h_+(t) + F_\times(t) \,h_\times(t)\,, * \f] * where \f$F_+\f$ and \f$F_x\f$ are called the <em>beam-pattern</em> functions, * which depend of the wave polarization \f$\psi\f$, * the source position \f$\alpha\f$, \f$\delta\f$ and the detector position and * orientation (\f$\gamma\f$, \f$\lambda\f$, \f$L\f$ and \f$\xi\f$). The expressions for * the beam-pattern functions are given in \cite JKS98 , which we write as * \f{eqnarray}{ * F_+(t) = \sin \zeta \cos 2\psi \, a(t) + \sin \zeta \sin 2\psi \, b(t)\,,\\ * F_\times(t) = \sin\zeta \cos 2\psi \,b(t) - \sin\zeta \sin 2\psi \, a(t) \,, * \f} * where \f$\zeta\f$ is the angle between the interferometer arms, and * \f{eqnarray}{ * a(t) &=& a_1 \cos[ 2 (\alpha - T)) ] + a_2 \sin[ 2(\alpha - T)] * + a_3 \cos[ \alpha - T ] + a_4 \sin [ \alpha - T ] + a_5\,,\\ * b(t) &=& b_1 \cos[ 2(\alpha - T)] + b_2 \sin[ 2(\alpha - T) ] * + b_3 \cos[ \alpha - T ] + b_4 \sin[ \alpha - T]\,, * \f} * where \f$T\f$ is the local (mean) sidereal time of the detector, and the * time-independent coefficients \f$a_i\f$ and \f$b_i\f$ are given by * \f{eqnarray}{ * a_1 &=& \frac{1}{16} \sin 2\gamma \,(3- \cos 2\lambda)\,(3 - \cos 2\delta)\,,\\ * a_2 &=& -\frac{1}{4}\cos 2\gamma \,\sin \lambda \,(3 - \cos 2\delta) \,,\\ * a_3 &=& \frac{1}{4} \sin 2\gamma \,\sin 2\lambda \,\sin 2\delta \,\\ * a_4 &=& -\frac{1}{2} \cos 2\gamma \,\cos \lambda \,\sin 2 \delta\,,\\ * a_5 &=& \frac{3}{4} \sin 2\gamma \, \cos^2 \lambda \,\cos^2 \delta\,, * \f} * and * \f{eqnarray}{ * b_1 &=& \cos 2\gamma \,\sin \lambda \,\sin \delta\,,\\ * b_2 &=& \frac{1}{4} \sin 2\gamma \,(3-\cos 2\lambda)\, \sin \delta\,,\\ * b_3 &=& \cos 2\gamma \,\cos \lambda \,\cos\delta \,, \\ * b_4 &=& \frac{1}{2} \sin2\gamma \,\sin 2\lambda \,\cos\delta\,, * \f} * * The source model considered is a plane-wave * \f{eqnarray}{ * h_+(t) &=& A_+\, \cos \Psi(t)\,,\\ * h_\times(t) &=& A_\times \, \sin \Psi(t)\,, * \f} * where the wave-phase is \f$\Psi(t) = \Phi_0 + \Phi(t)\f$, and for an * isolated pulsar we have * \f{equation}{ * \Phi(t) = 2\pi \left[\sum_{s=0} \frac{f^{(s)}(\tau_\mathrm{ref})}{ * (s+1)!} \left( \tau(t) - \tau_\mathrm{ref} \right)^{s+1} \right]\,, * \f} * where \f$\tau_\mathrm{ref}\f$ is the "reference time" for the definition * of the pulsar-parameters \f$f^{(s)}\f$ in the solar-system barycenter * (SSB), and \f$\tau(t)\f$ is the SSB-time of the phase arriving at the * detector at UTC-time \f$t\f$, which depends on the source-position * (\f$\alpha\f$, \f$\delta\f$) and the detector-position, namely * \f{equation}{ * \tau (t) = t + \frac{ \vec{r}(t)\cdot\vec{n}}{c}\,, * \f} * where \f$\vec{r}(t)\f$ is the vector from SSB to the detector, and \f$\vec{n}\f$ * is the unit-vector pointing <em>to</em> the source. * * This is a standalone "clean-room" implementation using no other * outside-functions <em>except</em> for LALGPStoLMST1() to calculate * the local (mean) sidereal time at the detector for given GPS-time, * (which I double-checked with an independent Mathematica script), * and and XLALBarycenter() to calculate \f$\tau(t)\f$. * * NOTE: currently only isolated pulsars are supported * * NOTE2: we don't really use the highest possible accuracy right now, * as we blatently neglect all relativistic timing effects (i.e. using dT=v.n/c) * * NOTE3: no heterodyning is performed here, the time-series is generated and sampled * at the given rate, that's all! ==\> the caller needs to make sure about the * right sampling rate to use (-\>aliasing) and do the proper post-treatment... * */ REAL4TimeSeries * XLALSimulateExactPulsarSignal ( const PulsarSignalParams *params ) { XLAL_CHECK_NULL ( params != NULL, XLAL_EINVAL, "Invalid NULL input 'params'\n"); XLAL_CHECK_NULL ( params->samplingRate > 0, XLAL_EDOM, "Sampling rate must be positive, got samplingRate = %g\n", params->samplingRate ); /* don't accept heterodyning frequency */ XLAL_CHECK_NULL ( params->fHeterodyne == 0, XLAL_EINVAL, "Heterodyning frequency must be set to 0, got params->fHeterodyne = %g\n", params->fHeterodyne ); UINT4 numSpins = 3; /* get timestamps of timeseries plus detector-states */ REAL8 dt = 1.0 / params->samplingRate; LIGOTimeGPSVector *timestamps; XLAL_CHECK_NULL ( (timestamps = XLALMakeTimestamps ( params->startTimeGPS, params->duration, dt, 0 )) != NULL, XLAL_EFUNC ); UINT4 numSteps = timestamps->length; DetectorStateSeries *detStates = XLALGetDetectorStates ( timestamps, params->site, params->ephemerides, 0 ); XLAL_CHECK_NULL ( detStates != NULL, XLAL_EFUNC, "XLALGetDetectorStates() failed.\n"); XLALDestroyTimestampVector ( timestamps ); timestamps = NULL; AMCoeffs *amcoe = XLALComputeAMCoeffs ( detStates, params->pulsar.position ); XLAL_CHECK_NULL ( amcoe != NULL, XLAL_EFUNC, "XLALComputeAMCoeffs() failed.\n"); /* create output timeseries (FIXME: should really know *detector* here, not just site!!) */ const LALFrDetector *site = &(params->site->frDetector); CHAR *channel = XLALGetChannelPrefix ( site->name ); XLAL_CHECK_NULL ( channel != NULL, XLAL_EFUNC, "XLALGetChannelPrefix( %s ) failed.\n", site->name ); REAL4TimeSeries *ts = XLALCreateREAL4TimeSeries ( channel, &(detStates->data[0].tGPS), 0, dt, &emptyUnit, numSteps ); XLAL_CHECK_NULL ( ts != NULL, XLAL_EFUNC, "XLALCreateREAL4TimeSeries() failed.\n"); XLALFree ( channel ); channel = NULL; /* orientation of detector arms */ REAL8 xAzi = site->xArmAzimuthRadians; REAL8 yAzi = site->yArmAzimuthRadians; REAL8 Zeta = xAzi - yAzi; if (Zeta < 0) { Zeta = -Zeta; } if ( params->site->type == LALDETECTORTYPE_CYLBAR ) { Zeta = LAL_PI_2; } REAL8 sinZeta = sin(Zeta); /* get source skyposition */ REAL8 Alpha = params->pulsar.position.longitude; REAL8 Delta = params->pulsar.position.latitude; REAL8 vn[3]; vn[0] = cos(Delta) * cos(Alpha); vn[1] = cos(Delta) * sin(Alpha); vn[2] = sin(Delta); /* get spin-parameters (restricted to maximally 3 spindowns right now) */ REAL8 phi0 = params->pulsar.phi0; REAL8 f0 = params->pulsar.f0; REAL8 f1dot = 0, f2dot = 0, f3dot = 0; if ( params->pulsar.spindown && (params->pulsar.spindown->length > numSpins) ) { XLAL_ERROR_NULL ( XLAL_EDOM, "Currently only supports up to %d spindowns!\n", numSpins ); } if ( params->pulsar.spindown && (params->pulsar.spindown->length >= 3 ) ) { f3dot = params->pulsar.spindown->data[2]; } if ( params->pulsar.spindown && (params->pulsar.spindown->length >= 2 ) ) { f2dot = params->pulsar.spindown->data[1]; } if ( params->pulsar.spindown && (params->pulsar.spindown->length >= 1 ) ) { f1dot = params->pulsar.spindown->data[0]; } /* internally we always work with refTime = startTime->SSB, therefore * we need to translate the pulsar spin-params and initial phase to the * startTime */ REAL8 startTimeSSB = XLALGPSGetREAL8 ( &(detStates->data[0].tGPS) ) + SCALAR ( vn, detStates->data[0].rDetector ); REAL8 refTime; if ( params->pulsar.refTime.gpsSeconds != 0 ) { REAL8 refTime0 = XLALGPSGetREAL8 ( &(params->pulsar.refTime) ); REAL8 deltaRef = startTimeSSB - refTime0; LIGOTimeGPS newEpoch; PulsarSpins fkdotNew; XLALGPSSetREAL8( &newEpoch, startTimeSSB ); PulsarSpins XLAL_INIT_DECL(fkdotOld); fkdotOld[0] = f0; fkdotOld[1] = f1dot; fkdotOld[2] = f2dot; fkdotOld[3] = f3dot; REAL8 DeltaTau = XLALGPSDiff ( &newEpoch, &(params->pulsar.refTime) ); int ret = XLALExtrapolatePulsarSpins ( fkdotNew, fkdotOld, DeltaTau ); XLAL_CHECK_NULL ( ret == XLAL_SUCCESS, XLAL_EFUNC, "XLALExtrapolatePulsarSpins() failed.\n"); /* Finally, need to propagate phase */ phi0 += LAL_TWOPI * ( f0 * deltaRef + (1.0/2.0) * f1dot * deltaRef * deltaRef + (1.0/6.0) * f2dot * deltaRef * deltaRef * deltaRef + (1.0/24.0)* f3dot * deltaRef * deltaRef * deltaRef * deltaRef ); f0 = fkdotNew[0]; f1dot = fkdotNew[1]; f2dot = fkdotNew[2]; f3dot = fkdotNew[3]; refTime = startTimeSSB; } /* if refTime given */ else { /* if not given: use startTime -> SSB */ refTime = startTimeSSB; } /* get 4 amplitudes A_\mu */ REAL8 aPlus = sinZeta * params->pulsar.aPlus; REAL8 aCross = sinZeta * params->pulsar.aCross; REAL8 twopsi = 2.0 * params->pulsar.psi; REAL8 A1 = aPlus * cos(phi0) * cos(twopsi) - aCross * sin(phi0) * sin(twopsi); REAL8 A2 = aPlus * cos(phi0) * sin(twopsi) + aCross * sin(phi0) * cos(twopsi); REAL8 A3 = -aPlus * sin(phi0) * cos(twopsi) - aCross * cos(phi0) * sin(twopsi); REAL8 A4 = -aPlus * sin(phi0) * sin(twopsi) + aCross * cos(phi0) * cos(twopsi); /* main loop: generate time-series */ for ( UINT4 i = 0; i < numSteps; i++) { LIGOTimeGPS *tiGPS = &(detStates->data[i].tGPS); REAL8 ti = XLALGPSGetREAL8 ( tiGPS ); REAL8 deltati = ti - refTime; REAL8 dT = SCALAR(vn, detStates->data[i].rDetector ); REAL8 taui = deltati + dT; REAL8 phi_i = LAL_TWOPI * ( f0 * taui + (1.0/2.0) * f1dot * taui*taui + (1.0/6.0) * f2dot * taui*taui*taui + (1.0/24.0)* f3dot * taui*taui*taui*taui ); REAL8 cosphi_i = cos(phi_i); REAL8 sinphi_i = sin(phi_i); REAL8 ai = amcoe->a->data[i]; REAL8 bi = amcoe->b->data[i]; REAL8 hi = A1 * ai * cosphi_i + A2 * bi * cosphi_i + A3 * ai * sinphi_i + A4 * bi * sinphi_i; ts->data->data[i] = (REAL4)hi; } /* for i < numSteps */ XLALDestroyDetectorStateSeries( detStates ); XLALDestroyAMCoeffs ( amcoe ); return ts; } /* XLALSimulateExactPulsarSignal() */