/*
* main
*/
int main (int argc , char **argv) {
FILE *f;
int status;
int start_time;
COMPLEX16FrequencySeries *hptilde = NULL, *hctilde = NULL;
REAL8TimeSeries *hplus = NULL;
REAL8TimeSeries *hcross = NULL;
GSParams *params;
/* set us up to fail hard */
XLALSetErrorHandler(XLALAbortErrorHandler);
/* parse commandline */
params = parse_args(argc, argv);
/* generate waveform */
start_time = time(NULL);
switch (params->domain) {
case LAL_SIM_DOMAIN_FREQUENCY:
XLALSimInspiralChooseFDWaveform(&hptilde, &hctilde, params->phiRef,
params->deltaF, params->m1, params->m2, params->s1x,
params->s1y, params->s1z, params->s2x, params->s2y,
params->s2z, params->f_min, params->f_max, params->fRef,
params->distance, params->inclination, params->lambda1,
params->lambda2, params->waveFlags, params->nonGRparams,
params->ampO, params->phaseO, params->approximant);
break;
case LAL_SIM_DOMAIN_TIME:
XLALSimInspiralChooseTDWaveform(&hplus, &hcross, params->phiRef,
params->deltaT, params->m1, params->m2, params->s1x,
params->s1y, params->s1z, params->s2x, params->s2y,
params->s2z, params->f_min, params->fRef,
params->distance, params->inclination, params->lambda1,
params->lambda2, params->waveFlags,
params->nonGRparams, params->ampO, params->phaseO,
params->approximant);
break;
default:
XLALPrintError("Error: domain must be either TD or FD\n");
}
if (params->verbose)
XLALPrintInfo("Generation took %.0f seconds\n",
difftime(time(NULL), start_time));
if (((params->domain == LAL_SIM_DOMAIN_FREQUENCY) && (!hptilde || !hctilde)) ||
((params->domain == LAL_SIM_DOMAIN_TIME) && (!hplus || !hcross))) {
XLALPrintError("Error: waveform generation failed\n");
goto fail;
}
/* dump file */
if ( strlen(params->outname) > 0 ) {
f = fopen(params->outname, "w");
if (f==NULL) {
printf("**ERROR** Impossible to write file %s\n",params->outname);
exit(1);
}
else {
if (params->domain == LAL_SIM_DOMAIN_FREQUENCY)
if (params->ampPhase == 1)
status = dump_FD2(f, hptilde, hctilde);
else
status = dump_FD(f, hptilde, hctilde);
else if (params->ampPhase == 1)
status = dump_TD2(f, hplus, hcross);
else
status = dump_TD(f, hplus, hcross);
fclose(f);
}
if (status) goto fail;
}
/* clean up */
XLALSimInspiralDestroyWaveformFlags(params->waveFlags);
XLALSimInspiralDestroyTestGRParam(params->nonGRparams);
XLALFree(params);
XLALDestroyCOMPLEX16FrequencySeries(hptilde);
XLALDestroyCOMPLEX16FrequencySeries(hctilde);
return 0;
fail:
XLALSimInspiralDestroyWaveformFlags(params->waveFlags);
XLALSimInspiralDestroyTestGRParam(params->nonGRparams);
XLALFree(params);
XLALDestroyCOMPLEX16FrequencySeries(hptilde);
XLALDestroyCOMPLEX16FrequencySeries(hctilde);
return 1;
}
void LALInferenceTemplateXLALSimInspiralChooseWaveform(LALInferenceModel *model)
/*************************************************************************************************************************/
/* Wrapper for LALSimulation waveforms: */
/* XLALSimInspiralChooseFDWaveform() and XLALSimInspiralChooseTDWaveform(). */
/* */
/* model->params parameters are: */
/* - "name" description; type OPTIONAL (default value) */
/* */
/* MODEL PARAMETERS */
/* - "LAL_APPROXIMANT Approximant; Approximant */
/* - "LAL_PNORDER" Phase PN order; INT4 */
/* - "LAL_AMPORDER" Amplitude PN order; INT4 OPTIONAL (-1) */
/* - "spinO" Spin order; LALSimInspiralSpinOrder OPTIONAL (LAL_SIM_INSPIRAL_SPIN_ORDER_DEFAULT) */
/* - "tideO" Tidal order; LALSimInspiralTidalOrder OPTIONAL (LAL_SIM_INSPIRAL_TIDAL_ORDER_DEFAULT) */
/* - "f_ref" frequency at which the (frequency dependent) parameters are defined; REAL8 OPTIONAL (0.0) */
/* - "fLow" lower frequency bound; REAL8 OPTIONAL (model->fLow) */
/* */
/* MASS PARAMETERS; either: */
/* - "mass1" mass of object 1 in solar mass; REAL8 */
/* - "mass2" mass of object 1 in solar mass; REAL8 */
/* OR */
/* - "chirpmass" chirpmass in solar mass; REAL8 */
/* - "q" asymmetric mass ratio m2/m1, 0<q<1; REAL8 */
/* OR */
/* - "chirpmass" chirpmass in solar mass; REAL8 */
/* - "eta" symmetric mass ratio (m1*m2)/(m1+m2)^2; REAL8 */
/* */
/* ORIENTATION AND SPIN PARAMETERS */
/* - "phi0" reference phase as per LALSimulation convention; REAL8 */
/* - "distance" distance in Mpc */
/* - "costheta_jn"); cos of zenith angle between J and N in radians; REAL8 */
/* - "phi_jl"); azimuthal angle of L_N on its cone about J radians; REAL8 */
/* - "tilt_spin1"); zenith angle between S1 and LNhat in radians; REAL8 */
/* - "tilt_spin2"); zenith angle between S2 and LNhat in radians; REAL8 */
/* - "phi12"); difference in azimuthal angle between S1, S2 in radians; REAL8 */
/* - "a_spin1" magnitude of spin 1 in general configuration, -1<a_spin1<1; REAL8 OPTIONAL (0.0) */
/* - "a_spin2" magnitude of spin 2 in general configuration, -1<a_spin1<1; REAL8 OPTIONAL (0.0) */
/* */
/* OTHER PARAMETERS */
/* - "lambda1" tidal parameter of object 1; REAL8 OPTIONAL (0.0) */
/* - "lambda2" tidal parameter of object 1; REAL8 OPTIONAL (0.0) */
/* */
/* - "time" used as an OUTPUT only; REAL8 */
/* */
/* */
/* model needs to also contain: */
/* - model->fLow Unless - "fLow" OPTIONAL */
/* - model->deltaT */
/* - if model->domain == LAL_SIM_DOMAIN_FREQUENCY */
/* - model->deltaF */
/* - model->freqhCross */
/* - model->freqhPlus */
/* - else */
/* - model->timehPlus */
/* - model->timehCross */
/*************************************************************************************************************************/
{
Approximant approximant = (Approximant) 0;
INT4 order=-1;
INT4 amporder;
static int sizeWarning = 0;
int ret=0;
INT4 errnum=0;
REAL8TimeSeries *hplus=NULL; /**< +-polarization waveform [returned] */
REAL8TimeSeries *hcross=NULL; /**< x-polarization waveform [returned] */
COMPLEX16FrequencySeries *hptilde=NULL, *hctilde=NULL;
REAL8 mc;
REAL8 phi0, deltaT, m1, m2, f_low, f_start, distance, inclination;
REAL8 *m1_p,*m2_p;
REAL8 deltaF, f_max;
/* Sampling rate for time domain models */
deltaT = model->deltaT;
if (LALInferenceCheckVariable(model->params, "LAL_APPROXIMANT"))
approximant = *(Approximant*) LALInferenceGetVariable(model->params, "LAL_APPROXIMANT");
else {
XLALPrintError(" ERROR in templateLALGenerateInspiral(): (INT4) \"LAL_APPROXIMANT\" parameter not provided!\n");
XLAL_ERROR_VOID(XLAL_EDATA);
}
if (LALInferenceCheckVariable(model->params, "LAL_PNORDER"))
order = *(INT4*) LALInferenceGetVariable(model->params, "LAL_PNORDER");
else {
XLALPrintError(" ERROR in templateLALGenerateInspiral(): (INT4) \"LAL_PNORDER\" parameter not provided!\n");
XLAL_ERROR_VOID(XLAL_EDATA);
}
/* Explicitly set the default amplitude order if one is not specified.
* This serves two purposes:
* 1) The default behavior of the code won't change unexpectedly due to changes in LALSimulation.
* 2) We need to know the amplitude order in order to set the starting frequency of the waveform properly. */
if (LALInferenceCheckVariable(model->params, "LAL_AMPORDER"))
amporder = *(INT4*) LALInferenceGetVariable(model->params, "LAL_AMPORDER");
else
amporder = -1;
REAL8 f_ref = 100.0;
if (LALInferenceCheckVariable(model->params, "f_ref")) f_ref = *(REAL8 *)LALInferenceGetVariable(model->params, "f_ref");
REAL8 fTemp = f_ref;
if(LALInferenceCheckVariable(model->params,"chirpmass"))
{
mc = *(REAL8*) LALInferenceGetVariable(model->params, "chirpmass");
if (LALInferenceCheckVariable(model->params,"q")) {
REAL8 q = *(REAL8 *)LALInferenceGetVariable(model->params,"q");
q2masses(mc, q, &m1, &m2);
} else {
REAL8 eta = *(REAL8*) LALInferenceGetVariable(model->params, "eta");
mc2masses(mc, eta, &m1, &m2);
}
}
else if((m1_p=(REAL8 *)LALInferenceGetVariable(model->params, "mass1")) && (m2_p=(REAL8 *)LALInferenceGetVariable(model->params, "mass2")))
{
m1=*m1_p;
m2=*m2_p;
}
else
{
fprintf(stderr,"No mass parameters found!");
exit(0);
}
distance = LALInferenceGetREAL8Variable(model->params,"distance")* LAL_PC_SI * 1.0e6; /* distance (1 Mpc) in units of metres */
phi0 = LALInferenceGetREAL8Variable(model->params, "phase"); /* START phase as per lalsimulation convention, radians*/
/* Zenith angle between J and N in radians. Also known as inclination angle when spins are aligned */
REAL8 thetaJN = acos(LALInferenceGetREAL8Variable(model->params, "costheta_jn")); /* zenith angle between J and N in radians */
/* Check if fLow is a model parameter, otherwise use data structure definition */
if(LALInferenceCheckVariable(model->params, "flow"))
f_low = *(REAL8*) LALInferenceGetVariable(model->params, "flow");
else
f_low = model->fLow;
f_start = fLow2fStart(f_low, amporder, approximant);
f_max = 0.0; /* for freq domain waveforms this will stop at ISCO. Previously found using model->fHigh causes NaNs in waveform (see redmine issue #750)*/
/* ==== SPINS ==== */
/* We will default to spinless signal and then add in the spin components if required */
/* If there are non-aligned spins, we must convert between the System Frame coordinates
* and the cartestian coordinates */
/* The cartesian spin coordinates (default 0), as passed to LALSimulation */
REAL8 spin1x = 0.0;
REAL8 spin1y = 0.0;
REAL8 spin1z = 0.0;
REAL8 spin2x = 0.0;
REAL8 spin2y = 0.0;
REAL8 spin2z = 0.0;
/* System frame coordinates as used for jump proposals */
REAL8 a_spin1 = 0.0; /* Magnitude of spin1 */
REAL8 a_spin2 = 0.0; /* Magnitude of spin2 */
REAL8 phiJL = 0.0; /* azimuthal angle of L_N on its cone about J radians */
REAL8 tilt1 = 0.0; /* zenith angle between S1 and LNhat in radians */
REAL8 tilt2 = 0.0; /* zenith angle between S2 and LNhat in radians */
REAL8 phi12 = 0.0; /* difference in azimuthal angle btwn S1, S2 in radians */
/* Now check if we have spin amplitudes */
if(LALInferenceCheckVariable(model->params, "a_spin1")) a_spin1 = *(REAL8*) LALInferenceGetVariable(model->params, "a_spin1");
if(LALInferenceCheckVariable(model->params, "a_spin2")) a_spin2 = *(REAL8*) LALInferenceGetVariable(model->params, "a_spin2");
/* Check if we have spin angles too */
if(LALInferenceCheckVariable(model->params, "phi_jl"))
phiJL = LALInferenceGetREAL8Variable(model->params, "phi_jl");
if(LALInferenceCheckVariable(model->params, "tilt_spin1"))
tilt1 = LALInferenceGetREAL8Variable(model->params, "tilt_spin1");
if(LALInferenceCheckVariable(model->params, "tilt_spin2"))
tilt2 = LALInferenceGetREAL8Variable(model->params, "tilt_spin2");
if(LALInferenceCheckVariable(model->params, "phi12"))
phi12 = LALInferenceGetREAL8Variable(model->params, "phi12");
/* If we have tilt angles zero, then the spins are aligned and we just set the z component */
/* However, if the waveform supports precession then we still need to get the right coordinate components */
SpinSupport spin_support=XLALSimInspiralGetSpinSupportFromApproximant(approximant);
if(tilt1==0.0 && tilt2==0.0 && (spin_support==LAL_SIM_INSPIRAL_SPINLESS || spin_support==LAL_SIM_INSPIRAL_ALIGNEDSPIN))
{
spin1z=a_spin1;
spin2z=a_spin2;
inclination = thetaJN; /* Inclination angle is just thetaJN */
}
else
{ /* Template is not aligned-spin only. */
/* Set all the other spin components according to the angles we received above */
/* The transformation function doesn't know fLow, so f_ref==0 isn't interpretted as a request to use the starting frequency for reference. */
if(fTemp==0.0)
fTemp = f_start;
XLAL_TRY(ret=XLALSimInspiralTransformPrecessingNewInitialConditions(
&inclination, &spin1x, &spin1y, &spin1z, &spin2x, &spin2y, &spin2z,
thetaJN, phiJL, tilt1, tilt2, phi12, a_spin1, a_spin2, m1*LAL_MSUN_SI, m2*LAL_MSUN_SI, fTemp), errnum);
if (ret == XLAL_FAILURE)
{
XLALPrintError(" ERROR in XLALSimInspiralTransformPrecessingNewInitialConditions(): error converting angles. errnum=%d\n",errnum );
return;
}
}
/* ==== TIDAL PARAMETERS ==== */
REAL8 lambda1 = 0.;
if(LALInferenceCheckVariable(model->params, "lambda1")) lambda1 = *(REAL8*) LALInferenceGetVariable(model->params, "lambda1");
REAL8 lambda2 = 0.;
if(LALInferenceCheckVariable(model->params, "lambda2")) lambda2 = *(REAL8*) LALInferenceGetVariable(model->params, "lambda2");
REAL8 lambdaT = 0.;
REAL8 dLambdaT = 0.;
REAL8 sym_mass_ratio_eta = 0.;
if(LALInferenceCheckVariable(model->params, "lambdaT")&&LALInferenceCheckVariable(model->params, "dLambdaT")){
lambdaT = *(REAL8*) LALInferenceGetVariable(model->params, "lambdaT");
dLambdaT = *(REAL8*) LALInferenceGetVariable(model->params, "dLambdaT");
sym_mass_ratio_eta = m1*m2/((m1+m2)*(m1+m2));
LALInferenceLambdaTsEta2Lambdas(lambdaT,dLambdaT,sym_mass_ratio_eta,&lambda1,&lambda2);
}
/* Only use GR templates */
LALSimInspiralTestGRParam *nonGRparams = NULL;
/* ==== Call the waveform generator ==== */
if(model->domain == LAL_SIM_DOMAIN_FREQUENCY) {
deltaF = model->deltaF;
XLAL_TRY(ret=XLALSimInspiralChooseFDWaveformFromCache(&hptilde, &hctilde, phi0,
deltaF, m1*LAL_MSUN_SI, m2*LAL_MSUN_SI, spin1x, spin1y, spin1z,
spin2x, spin2y, spin2z, f_start, f_max, f_ref, distance, inclination,lambda1, lambda2, model->waveFlags, nonGRparams, amporder, order,
approximant,model->waveformCache, NULL), errnum);
/* if the waveform failed to generate, fill the buffer with zeros
* so that the previous waveform is not left there
*/
if (ret != XLAL_SUCCESS || hptilde == NULL || hctilde == NULL)
{
XLALPrintError(" ERROR in XLALSimInspiralChooseWaveformFromCache(): error generating waveform. errnum=%d\n",errnum );
memset(model->freqhPlus->data->data,0,sizeof(model->freqhPlus->data->data[0])*model->freqhPlus->data->length);
memset(model->freqhCross->data->data,0,sizeof(model->freqhCross->data->data[0])*model->freqhCross->data->length);
if ( hptilde ) XLALDestroyCOMPLEX16FrequencySeries(hptilde);
if ( hctilde ) XLALDestroyCOMPLEX16FrequencySeries(hctilde);
XLALSimInspiralDestroyTestGRParam(nonGRparams);
XLAL_ERROR_VOID(XLAL_FAILURE);
}
if (hptilde==NULL || hptilde->data==NULL || hptilde->data->data==NULL ) {
XLALPrintError(" ERROR in LALInferenceTemplateXLALSimInspiralChooseWaveform(): encountered unallocated 'hptilde'.\n");
XLAL_ERROR_VOID(XLAL_EFAULT);
}
if (hctilde==NULL || hctilde->data==NULL || hctilde->data->data==NULL ) {
XLALPrintError(" ERROR in LALInferenceTemplateXLALSimInspiralChooseWaveform(): encountered unallocated 'hctilde'.\n");
XLAL_ERROR_VOID(XLAL_EFAULT);
}
INT4 rem=0;
UINT4 size=hptilde->data->length;
if(size>model->freqhPlus->data->length) size=model->freqhPlus->data->length;
memcpy(model->freqhPlus->data->data,hptilde->data->data,sizeof(hptilde->data->data[0])*size);
if( (rem=(model->freqhPlus->data->length - size)) > 0)
memset(&(model->freqhPlus->data->data[size]),0, rem*sizeof(hptilde->data->data[0]) );
size=hctilde->data->length;
if(size>model->freqhCross->data->length) size=model->freqhCross->data->length;
memcpy(model->freqhCross->data->data,hctilde->data->data,sizeof(hctilde->data->data[0])*size);
if( (rem=(model->freqhCross->data->length - size)) > 0)
memset(&(model->freqhCross->data->data[size]),0, rem*sizeof(hctilde->data->data[0]) );
/* Destroy the nonGr params */
XLALSimInspiralDestroyTestGRParam(nonGRparams);
REAL8 instant = model->freqhPlus->epoch.gpsSeconds + 1e-9*model->freqhPlus->epoch.gpsNanoSeconds;
LALInferenceSetVariable(model->params, "time", &instant);
} else {
XLAL_TRY(ret=XLALSimInspiralChooseTDWaveformFromCache(&hplus, &hcross, phi0, deltaT,
m1*LAL_MSUN_SI, m2*LAL_MSUN_SI, spin1x, spin1y, spin1z,
spin2x, spin2y, spin2z, f_start, f_ref, distance,
inclination, lambda1, lambda2, model->waveFlags, nonGRparams,
amporder, order, approximant,model->waveformCache), errnum);
XLALSimInspiralDestroyTestGRParam(nonGRparams);
if (ret == XLAL_FAILURE || hplus == NULL || hcross == NULL)
{
XLALPrintError(" ERROR in XLALSimInspiralChooseWaveformFromCache(): error generating waveform. errnum=%d\n",errnum );
memset(model->timehPlus->data->data,0,sizeof(model->timehPlus->data->data[0]) * model->timehPlus->data->length);
memset(model->timehCross->data->data,0,sizeof(model->timehCross->data->data[0]) * model->timehCross->data->length);
if ( hplus ) XLALDestroyREAL8TimeSeries(hplus);
if ( hcross ) XLALDestroyREAL8TimeSeries(hcross);
XLALSimInspiralDestroyTestGRParam(nonGRparams);
XLAL_ERROR_VOID(XLAL_FAILURE);
}
/* The following complicated mess is a result of the following considerations:
1) The discrete time samples of the template and the timeModel
buffers will not, in general line up.
2) The likelihood function will timeshift the template in the
frequency domain to align it properly with the desired tc in
each detector (these are different because the detectors
receive the signal at different times). Because this
timeshifting is done in the frequency domain, the effective
time-domain template is periodic. We want to avoid the
possibility of non-zero template samples wrapping around from
the start/end of the buffer, since real templates are not
periodic!
3) If the template apporaches the ends of the timeModel buffer,
then it should be tapered in the same way as the timeData
(currently 0.4 seconds, hard-coded! Tukey window; see
LALInferenceReadData.c, near line 233) so that template and
signal in the data match. However, as an optimization, we
perform only one tapering and FFT-ing in the likelihood
function; subsequent timeshifts for the different detectors
will cause the tapered regions of the template and data to
become mis-aligned.
The algorthim we use is the following:
1) Inject the template to align with the nearest sample in the
timeModel buffer to the desired geocent_end time.
2) Check whether either the start or the end of the template
overlaps the tapered region, plus a safety buffer corresponding
to a conservative estimate of the largest geocenter <-->
detector timeshift.
a) If there is no overlap at the start or end of the buffer,
we're done.
b) If there is an overlap, issue one warning per process
(which can be disabled by setting the LAL debug level) about
a too-short segment length, and return.
*/
size_t waveLength = hplus->data->length;
size_t bufLength = model->timehPlus->data->length;
/* 2*Rearth/(c*deltaT)---2 is safety factor---is the maximum time
shift for any earth-based detector. */
size_t maxShift = (size_t)lround(4.255e-2/deltaT);
/* Taper 0.4 seconds at start and end (hard-coded! in
LALInferenceReadData.c, around line 233). */
size_t taperLength = (size_t)lround(0.4/deltaT);
/* Within unsafeLength of ends of buffer, possible danger of
wrapping and/or tapering interactions. */
size_t unsafeLength = taperLength + maxShift;
REAL8 desiredTc = *(REAL8 *)LALInferenceGetVariable(model->params, "time");
REAL8 tStart = XLALGPSGetREAL8(&(model->timehPlus->epoch));
REAL8 tEnd = tStart + deltaT * model->timehPlus->data->length;
if (desiredTc < tStart || desiredTc > tEnd) {
XLALDestroyREAL8TimeSeries(hplus);
XLALDestroyREAL8TimeSeries(hcross);
XLAL_PRINT_ERROR("desired tc (%.4f) outside data buffer\n", desiredTc);
XLAL_ERROR_VOID(XLAL_EDOM);
}
/* The nearest sample in model buffer to the desired tc. */
size_t tcSample = (size_t)lround((desiredTc - XLALGPSGetREAL8(&(model->timehPlus->epoch)))/deltaT);
/* The acutal coalescence time that corresponds to the buffer
sample on which the waveform's tC lands. */
REAL8 injTc = XLALGPSGetREAL8(&(model->timehPlus->epoch)) + tcSample*deltaT;
/* The sample at which the waveform reaches tc. */
size_t waveTcSample = (size_t)lround(-XLALGPSGetREAL8(&(hplus->epoch))/deltaT);
/* 1 + (number of samples post-tc in waveform) */
size_t wavePostTc = waveLength - waveTcSample;
size_t bufStartIndex = (tcSample >= waveTcSample ? tcSample - waveTcSample : 0);
size_t bufEndIndex = (wavePostTc + tcSample <= bufLength ? wavePostTc + tcSample : bufLength);
size_t bufWaveLength = bufEndIndex - bufStartIndex;
size_t waveStartIndex = (tcSample >= waveTcSample ? 0 : waveTcSample - tcSample);
if (bufStartIndex < unsafeLength || (bufLength - bufEndIndex) <= unsafeLength) {
/* The waveform could be timeshifted into a region where it will
be tapered improperly, or even wrap around from the periodic
timeshift. Issue warning. */
if (!sizeWarning) {
fprintf(stderr, "WARNING: Generated template is too long to guarantee that it will not\n");
fprintf(stderr, "WARNING: (a) lie in a tapered region of the time-domain buffer\n");
fprintf(stderr, "WARNING: (b) wrap periodically when timeshifted in likelihood computation\n");
fprintf(stderr, "WARNING: Either of these may cause differences between the template and the\n");
fprintf(stderr, "WARNING: correct GW waveform in each detector.\n");
fprintf(stderr, "WARNING: Parameter estimation will continue, but you should consider\n");
fprintf(stderr, "WARNING: increasing the data segment length (using the --seglen) option.\n");
sizeWarning = 1;
}
}
/* Clear model buffers */
memset(model->timehPlus->data->data, 0, sizeof(REAL8)*model->timehPlus->data->length);
memset(model->timehCross->data->data, 0, sizeof(REAL8)*model->timehCross->data->length);
/* Inject */
memcpy(model->timehPlus->data->data + bufStartIndex,
hplus->data->data + waveStartIndex,
bufWaveLength*sizeof(REAL8));
memcpy(model->timehCross->data->data + bufStartIndex,
hcross->data->data + waveStartIndex,
bufWaveLength*sizeof(REAL8));
LALInferenceSetVariable(model->params, "time", &injTc);
}
if ( hplus ) XLALDestroyREAL8TimeSeries(hplus);
if ( hcross ) XLALDestroyREAL8TimeSeries(hcross);
if ( hptilde ) XLALDestroyCOMPLEX16FrequencySeries(hptilde);
if ( hctilde ) XLALDestroyCOMPLEX16FrequencySeries(hctilde);
return;
}
REAL8 calculate_lalsim_snr(SimInspiralTable *inj, char *IFOname, REAL8FrequencySeries *psd, REAL8 start_freq)
{
/* Calculate and return the single IFO SNR
*
* Required options:
*
* inj: SimInspiralTable entry for which the SNR has to be calculated
* IFOname: The canonical name (e.g. H1, L1, V1) name of the IFO for which the SNR must be calculated
* PSD: PSD curve to be used for the overlap integrap
* start_freq: lower cutoff of the overlap integral
*
* */
int ret=0;
INT4 errnum=0;
UINT4 j=0;
/* Fill detector site info */
LALDetector* detector=NULL;
detector=calloc(1,sizeof(LALDetector));
if(!strcmp(IFOname,"H1"))
memcpy(detector,&lalCachedDetectors[LALDetectorIndexLHODIFF],sizeof(LALDetector));
if(!strcmp(IFOname,"H2"))
memcpy(detector,&lalCachedDetectors[LALDetectorIndexLHODIFF],sizeof(LALDetector));
if(!strcmp(IFOname,"LLO")||!strcmp(IFOname,"L1"))
memcpy(detector,&lalCachedDetectors[LALDetectorIndexLLODIFF],sizeof(LALDetector));
if(!strcmp(IFOname,"V1")||!strcmp(IFOname,"VIRGO"))
memcpy(detector,&lalCachedDetectors[LALDetectorIndexVIRGODIFF],sizeof(LALDetector));
Approximant approx=TaylorF2;
approx=XLALGetApproximantFromString(inj->waveform);
LALSimulationDomain modelDomain;
if(XLALSimInspiralImplementedFDApproximants(approx)) modelDomain = LAL_SIM_DOMAIN_FREQUENCY;
else if(XLALSimInspiralImplementedTDApproximants(approx)) modelDomain = LAL_SIM_DOMAIN_TIME;
else
{
fprintf(stderr,"ERROR. Unknown approximant number %i. Unable to choose time or frequency domain model.",approx);
exit(1);
}
REAL8 m1,m2, s1x,s1y,s1z,s2x,s2y,s2z,phi0,f_min,f_max,iota,polarization,
/* No tidal PN terms until injtable is able to get them */
lambda1=0.0,lambda2=0.0;
LALSimInspiralWaveformFlags *waveFlags= XLALSimInspiralCreateWaveformFlags();
/* Spin and tidal interactions at the highest level (default) until injtable stores them.
* When spinO and tideO are added to injtable we can un-comment those lines and should be ok
*
int spinO = inj->spinO;
int tideO = inj->tideO;
XLALSimInspiralSetSpinOrder(waveFlags, *(LALSimInspiralSpinOrder*) spinO);
XLALSimInspiralSetTidalOrder(waveFlags, *(LALSimInspiralTidalOrder*) tideO);
*/
/* When nonGR terms stored in the table, we can add them here. (If they are only phase deformations, they won't change the SNR though) */
LALSimInspiralTestGRParam *nonGRparams=NULL;
/* Linked list of non-GR parameters. Pass in NULL (or None in python) for standard GR waveforms */
LALPNOrder order; /* Phase order of the model */
INT4 amporder=0;
order = XLALGetOrderFromString(inj->waveform);
amporder = inj->amp_order;
/* Read parameters */
m1=inj->mass1*LAL_MSUN_SI;
m2=inj->mass2*LAL_MSUN_SI;
s1x=inj->spin1x;
s1y=inj->spin1y;
s1z=inj->spin1z;
s2x=inj->spin2x;
s2y=inj->spin2y;
s2z=inj->spin2z;
iota=inj->inclination;
f_min=start_freq;
phi0=inj->coa_phase;
polarization=inj->polarization;
REAL8 latitude=inj->latitude;
REAL8 longitude=inj->longitude;
LIGOTimeGPS epoch;
memcpy(&epoch,&(inj->geocent_end_time),sizeof(LIGOTimeGPS));
/* Hardcoded values of srate and segment length. If changed here they must also be changed in inspinj.c */
REAL8 srate=4096.0;
const CHAR *WF=inj->waveform;
/* Increase srate for EOB WFs */
if (strstr(WF,"EOB"))
srate=8192.0;
REAL8 segment=64.0;
f_max=(srate/2.0-(1.0/segment));
size_t seglen=(size_t) segment*srate;
REAL8 deltaF=1.0/segment;
REAL8 deltaT=1.0/srate;
/* Frequency domain h+ and hx. They are going to be filled either by a FD WF or by the FFT of a TD WF*/
COMPLEX16FrequencySeries *freqHplus;
COMPLEX16FrequencySeries *freqHcross;
freqHplus= XLALCreateCOMPLEX16FrequencySeries("fhplus",
&epoch,
0.0,
deltaF,
&lalDimensionlessUnit,
seglen/2+1
);
freqHcross=XLALCreateCOMPLEX16FrequencySeries("fhcross",
&epoch,
0.0,
deltaF,
&lalDimensionlessUnit,
seglen/2+1
);
/* If the approximant is on the FD call XLALSimInspiralChooseFDWaveform */
if (modelDomain == LAL_SIM_DOMAIN_FREQUENCY)
{
COMPLEX16FrequencySeries *hptilde=NULL;
COMPLEX16FrequencySeries *hctilde=NULL;
XLAL_TRY(ret=XLALSimInspiralChooseFDWaveform(&hptilde,&hctilde, phi0, deltaF, m1, m2,
s1x, s1y, s1z, s2x, s2y, s2z, f_min, 0.0, 0.0, LAL_PC_SI * 1.0e6,
iota, lambda1, lambda2, waveFlags, nonGRparams,
amporder, order, approx),errnum
);
if(!hptilde|| hptilde->data==NULL || hptilde->data->data==NULL ||!hctilde|| hctilde->data==NULL || hctilde->data->data==NULL)
{
XLALPrintError(" ERROR in XLALSimInspiralChooseFDWaveform(): error generating waveform. errnum=%d. Exiting...\n",errnum );
exit(1);
}
COMPLEX16 *dataPtr = hptilde->data->data;
for (j=0; j<(UINT4) freqHplus->data->length; ++j)
{
if(j < hptilde->data->length)
{
freqHplus->data->data[j] = dataPtr[j];
}
else
{
freqHplus->data->data[j]=0.0 + I*0.0;
}
}
dataPtr = hctilde->data->data;
for (j=0; j<(UINT4) freqHplus->data->length; ++j)
{
if(j < hctilde->data->length)
{
freqHcross->data->data[j] = dataPtr[j];
}
else
{
freqHcross->data->data[j]=0.0+0.0*I;
}
}
/* Clean */
if(hptilde) XLALDestroyCOMPLEX16FrequencySeries(hptilde);
if(hctilde) XLALDestroyCOMPLEX16FrequencySeries(hctilde);
}
else
{
/* Otherwise use XLALSimInspiralChooseTDWaveform */
REAL8FFTPlan *timeToFreqFFTPlan = XLALCreateForwardREAL8FFTPlan((UINT4) seglen, 0 );
REAL8TimeSeries *hplus=NULL;
REAL8TimeSeries *hcross=NULL;
REAL8TimeSeries *timeHplus=NULL;
REAL8TimeSeries *timeHcross=NULL;
REAL8 padding =0.4;//seconds
REAL8Window *window=XLALCreateTukeyREAL8Window(seglen,(REAL8)2.0*padding*srate/(REAL8)seglen);
REAL4 WinNorm = sqrt(window->sumofsquares/window->data->length);
timeHcross=XLALCreateREAL8TimeSeries("timeModelhCross",
&epoch,
0.0,
deltaT,
&lalStrainUnit,
seglen
);
timeHplus=XLALCreateREAL8TimeSeries("timeModelhplus",
&epoch,
0.0,
deltaT,
&lalStrainUnit,
seglen
);
for (j=0;j<(UINT4) timeHcross->data->length;++j)
timeHcross->data->data[j]=0.0;
for (j=0;j<(UINT4) timeHplus->data->length;++j)
timeHplus->data->data[j]=0.0;
XLAL_TRY(ret=XLALSimInspiralChooseTDWaveform(&hplus, &hcross, phi0, deltaT,
m1, m2, s1x, s1y, s1z, s2x, s2y, s2z, f_min, 0., LAL_PC_SI*1.0e6,
iota, lambda1, lambda2, waveFlags, nonGRparams, amporder, order, approx),
errnum);
if (ret == XLAL_FAILURE || hplus == NULL || hcross == NULL)
{
XLALPrintError(" ERROR in XLALSimInspiralChooseTDWaveform(): error generating waveform. errnum=%d. Exiting...\n",errnum );
exit(1);
}
XLALSimAddInjectionREAL8TimeSeries(timeHplus, hplus, NULL);
XLALSimAddInjectionREAL8TimeSeries(timeHcross, hcross, NULL);
for (j=0; j<(UINT4) timeHplus->data->length; ++j)
timeHplus->data->data[j]*=window->data->data[j];
for (j=0; j<(UINT4) timeHcross->data->length; ++j)
timeHcross->data->data[j]*=window->data->data[j];
for (j=0; j<(UINT4) freqHplus->data->length; ++j)
{
freqHplus->data->data[j]=0.0+I*0.0;
freqHcross->data->data[j]=0.0+I*0.0;
}
/* FFT into freqHplus and freqHcross */
XLALREAL8TimeFreqFFT(freqHplus,timeHplus,timeToFreqFFTPlan);
XLALREAL8TimeFreqFFT(freqHcross,timeHcross,timeToFreqFFTPlan);
for (j=0; j<(UINT4) freqHplus->data->length; ++j)
{
freqHplus->data->data[j]/=WinNorm;
freqHcross->data->data[j]/=WinNorm;
}
/* Clean... */
if ( hplus ) XLALDestroyREAL8TimeSeries(hplus);
if ( hcross ) XLALDestroyREAL8TimeSeries(hcross);
if ( timeHplus ) XLALDestroyREAL8TimeSeries(timeHplus);
if ( timeHcross ) XLALDestroyREAL8TimeSeries(timeHcross);
if (timeToFreqFFTPlan) LALFree(timeToFreqFFTPlan);
if (window) XLALDestroyREAL8Window(window);
}
/* The WF has been generated and is in freqHplus/cross. Now project into the IFO frame */
double Fplus, Fcross;
double FplusScaled, FcrossScaled;
double HSquared;
double GPSdouble=(REAL8) inj->geocent_end_time.gpsSeconds+ (REAL8) inj->geocent_end_time.gpsNanoSeconds*1.0e-9;
double gmst;
LIGOTimeGPS GPSlal;
XLALGPSSetREAL8(&GPSlal, GPSdouble);
gmst=XLALGreenwichMeanSiderealTime(&GPSlal);
/* Fill Fplus and Fcross*/
XLALComputeDetAMResponse(&Fplus, &Fcross, (const REAL4 (*)[3])detector->response,longitude, latitude, polarization, gmst);
/* And take the distance into account */
FplusScaled = Fplus / (inj->distance);
FcrossScaled = Fcross / (inj->distance);
REAL8 timedelay = XLALTimeDelayFromEarthCenter(detector->location,longitude, latitude, &GPSlal);
REAL8 timeshift = timedelay;
REAL8 twopit = LAL_TWOPI * timeshift;
UINT4 lower = (UINT4)ceil(f_min / deltaF);
UINT4 upper = (UINT4)floor(f_max / deltaF);
REAL8 re = cos(twopit*deltaF*lower);
REAL8 im = -sin(twopit*deltaF*lower);
/* Incremental values, using cos(theta) - 1 = -2*sin(theta/2)^2 */
REAL8 dim = -sin(twopit*deltaF);
REAL8 dre = -2.0*sin(0.5*twopit*deltaF)*sin(0.5*twopit*deltaF);
REAL8 TwoDeltaToverN = 2.0 *deltaT / ((double) seglen);
REAL8 plainTemplateReal, plainTemplateImag,templateReal,templateImag;
REAL8 newRe, newIm,temp;
REAL8 this_snr=0.0;
for (j=lower; j<=(UINT4) upper; ++j)
{
/* derive template (involving location/orientation parameters) from given plus/cross waveforms: */
plainTemplateReal = FplusScaled * creal(freqHplus->data->data[j])
+ FcrossScaled *creal(freqHcross->data->data[j]);
plainTemplateImag = FplusScaled * cimag(freqHplus->data->data[j])
+ FcrossScaled * cimag(freqHcross->data->data[j]);
/* do time-shifting... */
/* (also un-do 1/deltaT scaling): */
templateReal = (plainTemplateReal*re - plainTemplateImag*im) / deltaT;
templateImag = (plainTemplateReal*im + plainTemplateImag*re) / deltaT;
HSquared = templateReal*templateReal + templateImag*templateImag ;
temp = ((TwoDeltaToverN * HSquared) / psd->data->data[j]);
this_snr += temp;
/* Now update re and im for the next iteration. */
newRe = re + re*dre - im*dim;
newIm = im + re*dim + im*dre;
re = newRe;
im = newIm;
}
/* Clean */
if (freqHcross) XLALDestroyCOMPLEX16FrequencySeries(freqHcross);
if (freqHplus) XLALDestroyCOMPLEX16FrequencySeries(freqHplus);
if (waveFlags) XLALSimInspiralDestroyWaveformFlags(waveFlags);
if (nonGRparams) XLALSimInspiralDestroyTestGRParam(nonGRparams);
if (detector) free(detector);
return sqrt(this_snr*2.0);
}
