LALInspiralTaylorT4Test.c

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/*
*  Copyright (C) 2011 Drew Keppel
*
*  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
*/
 
/**
 * \author Keppel, D.
 *
 * \brief Create waveforms based on the TaylorT4 model.
 *
 * Outputs a two files with three columns corresponding to time (in seconds),
 * \f$h_+\f$, and \f$h_\times\f$. The first output file is <tt>T4wave1.dat</tt> in
 * the current directory. This is generated using the
 * XLALSimInspiralTaylorT4PNRestricted routine. The seond output file is
 * <tt>T4wave2.dat</tt> in the current directory. This is generated using the
 * LALInspiralWave4Templates routine.
 *
 * ### Usage ###
 *
 * <tt>LALInspiralTaylorT4Test</tt>
 *
 */
 
#include <time.h>
#include <math.h>
#include <lal/LALStdlib.h>
#include <lal/LALInspiral.h>
#include <lal/LALSimInspiral.h>
#include <lal/GeneratePPNInspiral.h>
#include <lal/GenerateInspiral.h>
#include <lal/TimeSeries.h>
#include <lal/Units.h>
 
int main(void) {
        static LALStatus    mystatus;
 
        /* variables for timing purposes */
        clock_t start, diff;
        int msec;
 
        REAL4TimeSeries *h_plus;
        REAL4TimeSeries *h_cross;
        REAL8TimeSeries *hplus;
        REAL8TimeSeries *hcross;
        InspiralTemplate params;
 
        FILE *outputfile;
        INT4 i,length;
        REAL8 dt, m, m1, m2, nu, lambda1, lambda2;
        LIGOTimeGPS tc = LIGOTIMEGPSZERO;
 
        memset( &mystatus, 0, sizeof(LALStatus) );
        memset( &params, 0, sizeof(InspiralTemplate) );
 
        m1 = 5.;
        m2 = 5.;
        m = m1 + m2;
        nu = m1 * m2 / m / m;
 
        lambda1 = 0.;
        lambda2 = 0.;
        LALSimInspiralWaveformFlags *waveFlags;
        waveFlags = XLALSimInspiralCreateWaveformFlags();
 
        params.approximant = TaylorT4;
        params.order = LAL_PNORDER_THREE_POINT_FIVE;
        params.ampOrder = LAL_PNORDER_NEWTONIAN;
        params.mass1 = m1;
        params.mass2 = m2;
        params.totalMass = m;
        params.eta = nu;
        params.tSampling = 4096;
        params.fCutoff = 2047.;
        params.fLower = 40.;
        params.distance = 1e6 * LAL_PC_SI;
        params.ieta = 1;
 
        dt = 1. / params.tSampling;
 
        start = clock();
        length = XLALSimInspiralTaylorT4PNRestricted(&hplus, &hcross, 0., dt, params.mass1*LAL_MSUN_SI, params.mass2*LAL_MSUN_SI, params.fLower, 0., params.distance, lambda1, lambda2, XLALSimInspiralGetTidalOrder(waveFlags), 0, 7);
        diff = clock() - start;
        msec = diff * 1000 / CLOCKS_PER_SEC;
        printf("Time taken %d seconds %d milliseconds\n", msec/1000, msec%1000);
 
        fprintf(stderr, "length = %i\n", length);
        fprintf(stderr, "T = %f\n", (float) length * dt);
 
        outputfile = fopen("T4wave1.dat","w");
 
        length = hplus->data->length;
 
        for(i = 0; i < length; i++) {
                fprintf(outputfile,"%e\t%e\t%e\n",
                        i*dt,
                        hplus->data->data[i],
                        hcross->data->data[i]);
        }
 
        fclose(outputfile);
        fprintf(stdout,"waveform saved in T4wave1.dat\n" );
 
        start = clock();
        h_plus = XLALCreateREAL4TimeSeries("", &tc, 0.0, dt, &lalDimensionlessUnit, 4096*3);
        h_cross = XLALCreateREAL4TimeSeries("", &tc, 0.0, dt, &lalDimensionlessUnit, 4096*3);
 
        fprintf(stderr, "Lower cut-off frequency used will be %fHz\n", params.fLower);
 
        /* --- now we can call the injection function --- */
        LALTaylorT4WaveformTemplates(&mystatus, h_plus->data, h_cross->data, &params);
        diff = clock() - start;
        msec = diff * 1000 / CLOCKS_PER_SEC;
        printf("Time taken %d seconds %d milliseconds\n", msec/1000, msec%1000);
 
        if ( mystatus.statusCode )
        {
                fprintf( stderr, "LALInspiralTaylorT4Test: error generating waveform\n" );
                exit( 1 );
        }
 
        /* --- and finally save in a file --- */
 
        outputfile = fopen("T4wave2.dat","w");
 
        length = h_plus->data->length;
 
        for(i = 0; i < length; i++) {
                fprintf(outputfile,"%e\t%e\t%e\n",
                        i*dt,
                        h_plus->data->data[i],
                        h_cross->data->data[i]);
        }
 
        fclose(outputfile);
        fprintf(stdout,"waveform saved in T4wave2.dat\n" );
        return 0;
}