/*
* Copyright (c) 2017 by the Society of Exploration Geophysicists.
* For more information, go to http://software.seg.org/2017/00XX .
* You must read and accept usage terms at:
* http://software.seg.org/disclaimer.txt before use.
*/
#include "par.h"
#include "segy.h"
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <genfft.h>
int omp_get_max_threads(void);
int omp_get_num_threads(void);
void omp_set_num_threads(int num_threads);
#ifndef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#endif
#ifndef MIN
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#endif
#define NINT(x) ((int)((x)>0.0?(x)+0.5:(x)-0.5))
#ifndef COMPLEX
typedef struct _complexStruct { /* complex number */
float r,i;
} complex;
#endif/* complex */
int readShotData(char *filename, float *xrcv, float *xsrc, float *zsrc, int *xnx, complex *cdata, int nw, int nw_low, int nshots,
int nx, int nxs, float fxsb, float dxs, int ntfft, int mode, float scale, float tsq, float Q, float f0, int reci, int *nshots_r, int *isxcount, int *reci_xsrc, int *reci_xrcv, float *ixmask, int verbose);
int readTinvData(char *filename, float *xrcv, float *xsrc, float *zsrc, int *xnx, int Nfoc, int nx, int ntfft, int mode, int *maxval, float *tinv, int hw, int verbose);
int writeDataIter(char *file_iter, float *data, segy *hdrs, int n1, int n2, float d2, float f2, int n2out, int Nfoc, float *xsyn, float *zsyn, int *ixpos, int npos, int t0shift, int iter);
void name_ext(char *filename, char *extension);
void applyMute(float *data, int *mute, int smooth, int above, int Nfoc, int nxs, int nt, int *xrcvsyn, int npos, int shift, int *muteW);
void applyMute_tshift( float *data, int *mute, int smooth, int above, int Nfoc, int nxs, int nt, int *ixpos, int npos, int shift, int iter, int *tsynW);
void timeShift(float *data, int nsam, int nrec, float dt, float shift, float fmin, float fmax);
int getFileInfo(char *filename, int *n1, int *n2, int *ngath, float *d1, float *d2, float *f1, float *f2, float *xmin, float *xmax, float *sclsxgx, int *ntraces);
int readData(FILE *fp, float *data, segy *hdrs, int n1);
int writeData(FILE *fp, float *data, segy *hdrs, int n1, int n2);
int disp_fileinfo(char *file, int n1, int n2, float f1, float f2, float d1, float d2, segy *hdrs);
double wallclock_time(void);
void synthesis(complex *Refl, complex *Fop, float *Top, float *iRN, int nx, int nt, int nxs, int nts, float dt, float *xsyn, int
Nfoc, float *xrcv, float *xsrc, int *xnx, float fxse, float fxsb, float dxs, float dxsrc, float dx, int ntfft, int
nw, int nw_low, int nw_high, int mode, int reci, int nshots, int *ixpos, int npos, double *tfft, int *isxcount, int
*reci_xsrc, int *reci_xrcv, float *ixmask, int verbose);
void synthesisPositions(int nx, int nt, int nxs, int nts, float dt, float *xsyn, int Nfoc, float *xrcv, float *xsrc, int *xnx,
float fxse, float fxsb, float dxs, float dxsrc, float dx, int nshots, int *ixpos, int *npos, int *isxcount, int countmin, int reci, int verbose);
int linearsearch(int *array, size_t N, int value);
/*********************** self documentation **********************/
char *sdoc[] = {
" ",
" MARCHENKO - Iterative Green's function and focusing functions retrieval",
" ",
" marchenko file_tinv= file_shot= [optional parameters]",
" ",
" Required parameters: ",
" ",
" file_tinv= ............... direct arrival from focal point: G_d",
" file_shot= ............... Reflection response: R",
" ",
" Optional parameters: ",
" ",
" INTEGRATION ",
" tap=0 .................... lateral taper focusing(1), shot(2) or both(3)",
" ntap=0 ................... number of taper points at boundaries",
" fmin=0 ................... minimum frequency in the Fourier transform",
" fmax=70 .................. maximum frequency in the Fourier transform",
" MARCHENKO ITERATIONS ",
" niter=10 ................. number of iterations",
" MUTE-WINDOW ",
" above=0 .................. mute above(1), around(0) or below(-1) the first travel times of file_tinv",
" shift=12 ................. number of points above(positive) / below(negative) travel time for mute",
" hw=8 ..................... window in time samples to look for maximum in next trace",
" smooth=5 ................. number of points to smooth mute with cosine window",
" plane_wave=0 ............. enable plane-wave illumination function",
" src_angle=0 .............. angle of plane source array",
" src_velo=1500 ............ velocity to use in src_angle definition",
" REFLECTION RESPONSE CORRECTION ",
" tsq=0.0 .................. scale factor n for t^n for true amplitude recovery",
" Q=0.0 .......,............ Q correction factor",
" f0=0.0 ................... ... for Q correction factor",
" scale=2 .................. scale factor of R for summation of Ni with G_d",
" pad=0 .................... amount of samples to pad the reflection series",
" reci=0 ................... 1; add receivers as shots 2; only use receivers as shot positions",
" countmin=0 ............... 0.3*nxrcv; minumum number of reciprocal traces for a contribution",
" OUTPUT DEFINITION ",
" file_green= .............. output file with full Green function(s)",
" file_gplus= .............. output file with G+ ",
" file_gmin= ............... output file with G- ",
" file_f1plus= ............. output file with f1+ ",
" file_f1min= .............. output file with f1- ",
" file_f2= ................. output file with f2 (=p+) ",
" file_pplus= .............. output file with p+ ",
" file_pmin= ............... output file with p- ",
" file_iter= ............... output file with -Ni(-t) for each iteration",
" rotate=1 ................. 1: t=0 at nt/2 (middle) 0: t=0 at sample 0 for f1+,-",
" verbose=0 ................ silent option; >0 displays info",
" ",
" ",
" author : Jan Thorbecke : 2016 (j.w.thorbecke@tudelft.nl)",
" ",
NULL};
/**************** end self doc ***********************************/
int main (int argc, char **argv)
{
FILE *fp_out, *fp_f1plus, *fp_f1min;
FILE *fp_gmin, *fp_gplus, *fp_f2, *fp_pmin;
int i, j, l, ret, nshots, Nfoc, nt, nx, nts, nxs, ngath;
int size, n1, n2, ntap, tap, di, ntraces, pad, rotate;
int nw, nw_low, nw_high, nfreq, *xnx, *xnxsyn;
int reci, countmin, mode, n2out, verbose, ntfft;
int iter, niter, tracf, *muteW, *tsynW, itmin;
int hw, smooth, above, shift, *ixpos, npos, ix, plane_wave;
int nshots_r, *isxcount, *reci_xsrc, *reci_xrcv;
float fmin, fmax, *tapersh, *tapersy, fxf, dxf, *xsrc, *xrcv, *zsyn, *zsrc, *xrcvsyn;
double t0, t1, t2, t3, tsyn, tread, tfft, tcopy, energyNi, *energyN0;
float d1, d2, f1, f2, fxsb, fxse, ft, fx, *xsyn, dxsrc;
float *green, *f2p, *pmin, *G_d, dt, dx, dxs, scl, mem;
float *f1plus, *f1min, *iRN, *Ni, *trace, *Gmin, *Gplus;
float xmin, xmax, scale, tsq, Q, f0;
float *ixmask;
float grad2rad, p, src_angle, src_velo, tshift, tneg;
complex *Refl, *Fop;
char *file_tinv, *file_shot, *file_green, *file_iter;
char *file_f1plus, *file_f1min, *file_gmin, *file_gplus, *file_f2, *file_pmin;
segy *hdrs_out;
initargs(argc, argv);
requestdoc(1);
tsyn = tread = tfft = tcopy = 0.0;
t0 = wallclock_time();
if (!getparstring("file_shot", &file_shot)) file_shot = NULL;
if (!getparstring("file_tinv", &file_tinv)) file_tinv = NULL;
if (!getparstring("file_f1plus", &file_f1plus)) file_f1plus = NULL;
if (!getparstring("file_f1min", &file_f1min)) file_f1min = NULL;
if (!getparstring("file_gplus", &file_gplus)) file_gplus = NULL;
if (!getparstring("file_gmin", &file_gmin)) file_gmin = NULL;
if (!getparstring("file_pplus", &file_f2)) file_f2 = NULL;
if (!getparstring("file_f2", &file_f2)) file_f2 = NULL;
if (!getparstring("file_pmin", &file_pmin)) file_pmin = NULL;
if (!getparstring("file_iter", &file_iter)) file_iter = NULL;
if (!getparint("verbose", &verbose)) verbose = 0;
if (file_tinv == NULL && file_shot == NULL)
verr("file_tinv and file_shot cannot be both input pipe");
if (!getparstring("file_green", &file_green)) file_green = NULL;
if (!getparfloat("fmin", &fmin)) fmin = 0.0;
if (!getparfloat("fmax", &fmax)) fmax = 70.0;
if (!getparint("reci", &reci)) reci = 0;
if (!getparfloat("scale", &scale)) scale = 2.0;
if (!getparfloat("tsq", &tsq)) tsq = 0.0;
if (!getparfloat("Q", &Q)) Q = 0.0;
if (!getparfloat("f0", &f0)) f0 = 0.0;
if (!getparint("tap", &tap)) tap = 0;
if (!getparint("ntap", &ntap)) ntap = 0;
if (!getparint("pad", &pad)) pad = 0;
if (!getparint("rotate", &rotate)) rotate = 1;
if(!getparint("niter", &niter)) niter = 10;
if(!getparint("hw", &hw)) hw = 15;
if(!getparint("smooth", &smooth)) smooth = 5;
if(!getparint("above", &above)) above = 0;
if(!getparint("shift", &shift)) shift=12;
if (!getparint("plane_wave", &plane_wave)) plane_wave = 0;
if (!getparfloat("src_angle",&src_angle)) src_angle=0.;
if (!getparfloat("src_velo",&src_velo)) src_velo=1500.;
if (reci && ntap) vwarn("tapering influences the reciprocal result");
/*================ Reading info about shot and initial operator sizes ================*/
ngath = 0; /* setting ngath=0 scans all traces; n2 contains maximum traces/gather */
ret = getFileInfo(file_tinv, &n1, &n2, &ngath, &d1, &d2, &f1, &f2, &xmin, &xmax, &scl, &ntraces);
Nfoc = ngath;
nxs = n2;
nts = n1;
dxs = d2;
fxsb = f2;
ngath = 0; /* setting ngath=0 scans all traces; nx contains maximum traces/gather */
ret = getFileInfo(file_shot, &nt, &nx, &ngath, &d1, &dx, &ft, &fx, &xmin, &xmax, &scl, &ntraces);
nshots = ngath;
assert (nxs >= nshots);
if (!getparfloat("dt", &dt)) dt = d1;
ntfft = optncr(MAX(nt+pad, nts+pad));
nfreq = ntfft/2+1;
nw_low = (int)MIN((fmin*ntfft*dt), nfreq-1);
nw_low = MAX(nw_low, 1);
nw_high = MIN((int)(fmax*ntfft*dt), nfreq-1);
nw = nw_high - nw_low + 1;
scl = 1.0/((float)ntfft);
if (!getparint("countmin", &countmin)) countmin = 0.3*nx;
/*================ Allocating all data arrays ================*/
Fop = (complex *)calloc(nxs*nw*Nfoc,sizeof(complex));
green = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
f2p = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
pmin = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
f1plus = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
f1min = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
iRN = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
Ni = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
G_d = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
muteW = (int *)calloc(Nfoc*nxs,sizeof(int));
tsynW = (int *)malloc(Nfoc*nxs*sizeof(int)); // time-shift for Giovanni's plane-wave on non-zero times
energyN0= (double *)malloc(Nfoc*sizeof(double));
trace = (float *)malloc(ntfft*sizeof(float));
xrcvsyn = (float *)calloc(Nfoc*nxs,sizeof(float)); // x-rcv postions of focal points
xsyn = (float *)malloc(Nfoc*sizeof(float)); // x-src position of focal points
zsyn = (float *)malloc(Nfoc*sizeof(float)); // z-src position of focal points
xnxsyn = (int *)calloc(Nfoc,sizeof(int)); // number of traces per focal point
ixpos = (int *)calloc(nxs,sizeof(int)); // x-position of source of shot in G_d domain (nxs with dxs)
Refl = (complex *)malloc(nw*nx*nshots*sizeof(complex));
xrcv = (float *)calloc(nshots*nx,sizeof(float)); // x-rcv postions of shots
xsrc = (float *)calloc(nshots,sizeof(float)); //x-src position of shots
zsrc = (float *)calloc(nshots,sizeof(float)); // z-src position of shots
xnx = (int *)calloc(nshots,sizeof(int)); // number of traces per shot
if (reci!=0) {
reci_xsrc = (int *)malloc((nxs*nxs)*sizeof(int));
reci_xrcv = (int *)malloc((nxs*nxs)*sizeof(int));
isxcount = (int *)calloc(nxs,sizeof(int));
ixmask = (float *)calloc(nxs,sizeof(float));
}
/*================ Read and define mute window based on focusing operator(s) ================*/
/* G_d = p_0^+ = G_d (-t) ~ Tinv */
mode=-1; /* apply complex conjugate to read in data */
readTinvData(file_tinv, xrcvsyn, xsyn, zsyn, xnxsyn, Nfoc, nxs, ntfft,
mode, muteW, G_d, hw, verbose);
/* reading data added zero's to the number of time samples to be the same as ntfft */
nts = ntfft;
/* compute time shift for tilted plane waves */
if (plane_wave==1) {
/* compute time shift for shifted plane waves */
grad2rad = 17.453292e-3;
p = sin(src_angle*grad2rad)/src_velo;
tshift = fabs((nxs-1)*dxs*p);
/* compute mute window for plane waves */
//for (i=0; i<nxs; i++) fprintf(stderr,"i=%d window=%d\n", i, muteW[i]);
//itmin = nt;
//for (i=0; i<nxs; i++) itmin = MIN (itmin, muteW[i]);
/* for negative angles tshift is negative and */
if (src_angle < 0.0) {
itmin = NINT(tshift/dt);
//for (i=0; i<nxs; i++) muteW[i] = MAX(0, muteW[i]-itmin);
for (i=0; i<nxs; i++) muteW[i] = muteW[i]-itmin;
timeShift(G_d, nts, nxs, dt, tshift, fmin, fmax);
}
for (i=0; i<nxs; i++) tsynW[i] = NINT(i*dxs*p/dt);
//for (i=0; i<nxs; i++) tsynW[i] = 0.0;
if (Nfoc!=1) verr("For plane-wave focusing only one function can be computed at the same time");
//fprintf(stderr,"itmin=%d tshift=%f =%d \n", itmin, tshift, NINT(tshift/dt));
//for (i=0; i<nxs; i++) fprintf(stderr,"i=%d window=%f\n", i, tsynW[i]*dt);
/* // TESTING SHIFT
tshift=0.3;
for (i=0; i<nxs; i++) tsynW[i] = NINT(0.3/dt);
*/
}
else { /* just fill with zero's */
//itmin=0;
for (i=0; i<nxs*Nfoc; i++) {
tsynW[i] = 0;
}
}
/* define tapers to taper edges of acquisition */
if (tap == 1 || tap == 3) {
tapersy = (float *)malloc(nxs*sizeof(float));
for (j = 0; j < ntap; j++)
tapersy[j] = (cos(PI*(j-ntap)/ntap)+1)/2.0;
for (j = ntap; j < nxs-ntap; j++)
tapersy[j] = 1.0;
for (j = nxs-ntap; j < nxs; j++)
tapersy[j] =(cos(PI*(j+1-(nxs-ntap))/ntap)+1)/2.0;
if (verbose) vmess("Taper for operator applied ntap=%d", ntap);
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < nxs; i++) {
for (j = 0; j < nts; j++) {
G_d[l*nxs*nts+i*nts+j] *= tapersy[i];
}
}
}
free(tapersy);
}
/* check consistency of header values */
if (xrcvsyn[0] != 0 || xrcvsyn[1] != 0 ) fxsb = xrcvsyn[0];
fxse = fxsb + (float)(nxs-1)*dxs;
dxf = (xrcvsyn[nxs-1] - xrcvsyn[0])/(float)(nxs-1);
if (NINT(dxs*1e3) != NINT(fabs(dxf)*1e3)) {
vmess("dx in hdr.d1 (%.3f) and hdr.gx (%.3f) not equal",d2, dxf);
if (dxf != 0) dxs = fabs(dxf);
vmess("dx in operator => %f", dxs);
}
/*================ Reading shot records ================*/
mode=1;
readShotData(file_shot, xrcv, xsrc, zsrc, xnx, Refl, nw, nw_low, nshots, nx, nxs, fxsb, dxs, ntfft,
mode, scale, tsq, Q, f0, reci, &nshots_r, isxcount, reci_xsrc, reci_xrcv, ixmask, verbose);
if (tap == 2 || tap == 3) {
tapersh = (float *)malloc(nx*sizeof(float));
for (j = 0; j < ntap; j++)
tapersh[j] = (cos(PI*(j-ntap)/ntap)+1)/2.0;
for (j = ntap; j < nx-ntap; j++)
tapersh[j] = 1.0;
for (j = nx-ntap; j < nx; j++)
tapersh[j] =(cos(PI*(j+1-(nx-ntap))/ntap)+1)/2.0;
if (verbose) vmess("Taper for shots applied ntap=%d", ntap);
for (l = 0; l < nshots; l++) {
for (j = 1; j < nw; j++) {
for (i = 0; i < nx; i++) {
Refl[l*nx*nw+j*nx+i].r *= tapersh[i];
Refl[l*nx*nw+j*nx+i].i *= tapersh[i];
}
}
}
free(tapersh);
}
/* check consistency of header values */
fxf = xsrc[0];
if (nx > 1) dxf = (xrcv[nx-1] - xrcv[0])/(float)(nx-1);
else dxf = d2;
if (NINT(dx*1e3) != NINT(fabs(dxf)*1e3)) {
vmess("dx in hdr.d1 (%.3f) and hdr.gx (%.3f) not equal",dx, dxf);
if (dxf != 0) dx = fabs(dxf);
else verr("gx hdrs not set");
vmess("dx used => %f", dx);
}
dxsrc = (float)xsrc[1] - xsrc[0];
if (dxsrc == 0) {
vwarn("sx hdrs are not filled in!!");
dxsrc = dx;
}
/*================ Check the size of the files ================*/
if (NINT(dxsrc/dx)*dx != NINT(dxsrc)) {
vwarn("source (%.2f) and receiver step (%.2f) don't match",dxsrc,dx);
if (reci == 2) vwarn("step used from operator (%.2f) ",dxs);
}
di = NINT(dxf/dxs);
if ((NINT(di*dxs) != NINT(dxf)) && verbose)
vwarn("dx in receiver (%.2f) and operator (%.2f) don't match",dx,dxs);
if (nt != nts)
vmess("Time samples in shot (%d) and focusing operator (%d) are not equal",nt, nts);
if (verbose) {
vmess("Number of focusing operators = %d", Nfoc);
vmess("Number of receivers in focusop = %d", nxs);
vmess("number of shots = %d", nshots);
vmess("number of receiver/shot = %d", nx);
vmess("first model position = %.2f", fxsb);
vmess("last model position = %.2f", fxse);
vmess("first source position fxf = %.2f", fxf);
vmess("source distance dxsrc = %.2f", dxsrc);
vmess("last source position = %.2f", fxf+(nshots-1)*dxsrc);
vmess("receiver distance dxf = %.2f", dxf);
vmess("direction of increasing traces = %d", di);
vmess("number of time samples (nt,nts) = %d (%d,%d)", ntfft, nt, nts);
vmess("time sampling = %e ", dt);
if (file_green != NULL) vmess("Green output file = %s ", file_green);
if (file_gmin != NULL) vmess("Gmin output file = %s ", file_gmin);
if (file_gplus != NULL) vmess("Gplus output file = %s ", file_gplus);
if (file_pmin != NULL) vmess("Pmin output file = %s ", file_pmin);
if (file_f2 != NULL) vmess("f2 (=pplus) output file = %s ", file_f2);
if (file_f1min != NULL) vmess("f1min output file = %s ", file_f1min);
if (file_f1plus != NULL)vmess("f1plus output file = %s ", file_f1plus);
if (file_iter != NULL) vmess("Iterations output file = %s ", file_iter);
}
/*================ initializations ================*/
if (reci) n2out = nxs;
else n2out = nshots;
mem = Nfoc*n2out*ntfft*sizeof(float)/1048576.0;
if (verbose) {
vmess("number of output traces = %d", n2out);
vmess("number of output samples = %d", ntfft);
vmess("Size of output data/file = %.1f MB", mem);
}
/* dry-run of synthesis to get all x-positions calcalated by the integration */
synthesisPositions(nx, nt, nxs, nts, dt, xsyn, Nfoc, xrcv, xsrc, xnx, fxse, fxsb,
dxs, dxsrc, dx, nshots, ixpos, &npos, isxcount, countmin, reci, verbose);
if (verbose) {
vmess("synthesisPositions: nshots=%d npos=%d", nshots, npos);
}
/*================ set variables for output data ================*/
n1 = nts; n2 = n2out;
f1 = ft; f2 = fxsb+dxs*ixpos[0];
d1 = dt;
if (reci == 0) d2 = dxsrc; // distance between sources in R
else if (reci == 1) d2 = dxs; // distance between traces in G_d
else if (reci == 2) d2 = dx; // distance between receivers in R
hdrs_out = (segy *) calloc(n2,sizeof(segy));
if (hdrs_out == NULL) verr("allocation for hdrs_out");
size = nxs*nts;
for (i = 0; i < n2; i++) {
hdrs_out[i].ns = n1;
hdrs_out[i].trid = 1;
hdrs_out[i].dt = dt*1000000;
hdrs_out[i].f1 = f1;
hdrs_out[i].f2 = f2;
hdrs_out[i].d1 = d1;
hdrs_out[i].d2 = d2;
hdrs_out[i].trwf = n2out;
hdrs_out[i].scalco = -1000;
hdrs_out[i].gx = NINT(1000*(f2+i*d2));
hdrs_out[i].scalel = -1000;
hdrs_out[i].tracl = i+1;
}
t1 = wallclock_time();
tread = t1-t0;
/*================ initialization ================*/
memcpy(Ni, G_d, Nfoc*nxs*ntfft*sizeof(float));
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j = 0;
ix = ixpos[i]; /* select the traces that have an output trace after integration */
f2p[l*nxs*nts+i*nts+j] = G_d[l*nxs*nts+ix*nts+j];
f1plus[l*nxs*nts+i*nts+j] = G_d[l*nxs*nts+ix*nts+j];
for (j = 1; j < nts; j++) {
f2p[l*nxs*nts+i*nts+j] = G_d[l*nxs*nts+ix*nts+j];
f1plus[l*nxs*nts+i*nts+j] = G_d[l*nxs*nts+ix*nts+j];
}
}
}
/*================ start Marchenko iterations ================*/
for (iter=0; iter<niter; iter++) {
t2 = wallclock_time();
/*================ construction of Ni(-t) = - \int R(x,t) Ni(t) ================*/
synthesis(Refl, Fop, Ni, iRN, nx, nt, nxs, nts, dt, xsyn, Nfoc,
xrcv, xsrc, xnx, fxse, fxsb, dxs, dxsrc, dx, ntfft, nw, nw_low, nw_high, mode,
reci, nshots, ixpos, npos, &tfft, isxcount, reci_xsrc, reci_xrcv, ixmask, verbose);
t3 = wallclock_time();
tsyn += t3 - t2;
if (file_iter != NULL) {
writeDataIter(file_iter, iRN, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
}
/* N_k(x,t) = -N_(k-1)(x,-t) */
/* p0^-(x,t) += iRN = (R * T_d^inv)(t) */
for (l = 0; l < Nfoc; l++) {
energyNi = 0.0;
for (i = 0; i < npos; i++) {
j = 0;
ix = ixpos[i];
Ni[l*nxs*nts+i*nts+j] = -iRN[l*nxs*nts+ix*nts+j];
pmin[l*nxs*nts+i*nts+j] += iRN[l*nxs*nts+ix*nts+j];
energyNi += iRN[l*nxs*nts+ix*nts+j]*iRN[l*nxs*nts+ix*nts+j];
for (j = 1; j < nts; j++) {
Ni[l*nxs*nts+i*nts+j] = -iRN[l*nxs*nts+ix*nts+nts-j];
pmin[l*nxs*nts+i*nts+j] += iRN[l*nxs*nts+ix*nts+j];
energyNi += iRN[l*nxs*nts+ix*nts+j]*iRN[l*nxs*nts+ix*nts+j];
}
}
if (iter==0) energyN0[l] = energyNi;
if (verbose >=2) vmess(" - iSyn %d: Ni at iteration %d has energy %e; relative to N0 %e", l, iter, sqrt(energyNi), sqrt(energyNi/energyN0[l]));
}
//writeDataIter("bmute.su", Ni, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
/* apply mute window based on times of direct arrival (in muteW) */
if ( plane_wave==1 ) { /* use a-symmetric shift for plane waves with non-zero angles */
applyMute_tshift(Ni, muteW, smooth, 0, Nfoc, nxs, nts, ixpos, npos, shift, iter, tsynW);
}
else {
applyMute(Ni, muteW, smooth, -above, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
}
//writeDataIter("amute.su", Ni, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
/*
// for testing time-windows with dipping plane waves
for (i = 0; i < npos; i++) {
for (j = 0; j < nts; j++) {
Ni[i*nts+j] = 1.0;
}
}
applyMute_tshift(Ni, muteW, smooth, 0, Nfoc, nxs, nts, ixpos, npos, shift, iter, tsynW);
//applyMute(Ni, muteW, smooth, -above, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
writeDataIter("mute0.su", Ni, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
for (i = 0; i < npos; i++) {
for (j = 0; j < nts; j++) {
Ni[i*nts+j] = 1.0;
}
}
applyMute_tshift(Ni, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, iter, tsynW);
//applyMute(Ni, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
writeDataIter("mute4.su", Ni, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
*/
if (iter % 2 == 0) { /* even iterations update: => f_1^-(t) */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j = 0;
f1min[l*nxs*nts+i*nts+j] -= Ni[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
f1min[l*nxs*nts+i*nts+j] -= Ni[l*nxs*nts+i*nts+nts-j];
}
}
}
if (above==-2) applyMute(f1min, muteW, smooth, 0, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
}
else {/* odd iterations update: => f_1^+(t) */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j = 0;
f1plus[l*nxs*nts+i*nts+j] += Ni[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
f1plus[l*nxs*nts+i*nts+j] += Ni[l*nxs*nts+i*nts+j];
}
}
}
}
//writeDataIter("Ni.su", Ni, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 0, iter+1);
/* update f2 */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j = 0;
f2p[l*nxs*nts+i*nts+j] += Ni[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
f2p[l*nxs*nts+i*nts+j] += Ni[l*nxs*nts+i*nts+j];
}
}
}
t2 = wallclock_time();
tcopy += t2 - t3;
if (verbose) vmess("*** Iteration %d finished ***", iter);
} /* end of iterations */
free(Ni);
free(G_d);
/* compute full Green's function G = int R * f2(t) + f2(-t) = Pplus + Pmin */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j = 0;
/* set green to zero if mute-window exceeds nt/2 */
if (muteW[l*nxs+ixpos[i]] >= nts/2) {
memset(&green[l*nxs*nts+i*nts],0, sizeof(float)*nt);
continue;
}
green[l*nxs*nts+i*nts+j] = f2p[l*nxs*nts+i*nts+j] + pmin[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
green[l*nxs*nts+i*nts+j] = f2p[l*nxs*nts+i*nts+nts-j] + pmin[l*nxs*nts+i*nts+j];
}
}
}
applyMute(green, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
/* compute upgoing Green's function G^+,- */
if (file_gmin != NULL) {
Gmin = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
/* use f1+ as operator on R in frequency domain */
mode=1;
synthesis(Refl, Fop, f1plus, iRN, nx, nt, nxs, nts, dt, xsyn, Nfoc,
xrcv, xsrc, xnx, fxse, fxsb, dxs, dxsrc, dx, ntfft, nw, nw_low, nw_high, mode,
reci, nshots, ixpos, npos, &tfft, isxcount, reci_xsrc, reci_xrcv, ixmask, verbose);
writeDataIter("iRN.su", iRN, hdrs_out, ntfft, nxs, d2, f2, n2out, Nfoc, xsyn, zsyn, ixpos, npos, 1, iter+1);
/* compute upgoing Green's G^-,+ */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j=0;
ix = ixpos[i];
Gmin[l*nxs*nts+i*nts+j] = iRN[l*nxs*nts+ix*nts+j] - f1min[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
Gmin[l*nxs*nts+i*nts+j] = iRN[l*nxs*nts+ix*nts+j] - f1min[l*nxs*nts+i*nts+j];
}
}
}
/* Apply mute with window for Gmin */
if ( plane_wave==1 ) {
/* for plane wave with angle tshift downward */
applyMute_tshift(Gmin, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, 1, tsynW);
if (src_angle > 0.0) {
if (verbose>1) vmess("Gmin planewave tshift=%f", tshift);
timeShift(Gmin, nts, npos, dt, tshift, fmin, fmax);
}
else {
if (verbose>1) vmess("Gmin NO planewave tshift");
}
}
else {
applyMute(Gmin, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
}
} /* end if Gmin */
/* compute downgoing Green's function G^+,+ */
if (file_gplus != NULL) {
Gplus = (float *)calloc(Nfoc*nxs*ntfft,sizeof(float));
/* use f1-(*) as operator on R in frequency domain */
mode=-1;
synthesis(Refl, Fop, f1min, iRN, nx, nt, nxs, nts, dt, xsyn, Nfoc,
xrcv, xsrc, xnx, fxse, fxsb, dxs, dxsrc, dx, ntfft, nw, nw_low, nw_high, mode,
reci, nshots, ixpos, npos, &tfft, isxcount, reci_xsrc, reci_xrcv, ixmask, verbose);
/* compute downgoing Green's G^+,+ */
for (l = 0; l < Nfoc; l++) {
for (i = 0; i < npos; i++) {
j=0;
ix = ixpos[i];
Gplus[l*nxs*nts+i*nts+j] = -iRN[l*nxs*nts+ix*nts+j] + f1plus[l*nxs*nts+i*nts+j];
for (j = 1; j < nts; j++) {
Gplus[l*nxs*nts+i*nts+j] = -iRN[l*nxs*nts+ix*nts+j] + f1plus[l*nxs*nts+i*nts+nts-j];
}
}
}
/* Apply mute with window for Gplus */
if ( plane_wave==1 ) {
applyMute_tshift(Gplus, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, 0, tsynW);
}
else {
applyMute(Gplus, muteW, smooth, 4, Nfoc, nxs, nts, ixpos, npos, shift, tsynW);
}
} /* end if Gplus */
free(muteW);
free(tsynW);
free(energyN0);
t2 = wallclock_time();
if (verbose) {
vmess("Total CPU-time marchenko = %.3f", t2-t0);
vmess("with CPU-time synthesis = %.3f", tsyn);
vmess("with CPU-time copy array = %.3f", tcopy);
vmess(" CPU-time fft data = %.3f", tfft);
vmess("and CPU-time read data = %.3f", tread);
}
/*================ write output files ================*/
if (file_green != NULL) {
fp_out = fopen(file_green, "w+");
if (fp_out==NULL) verr("error on creating output file %s", file_green);
}
if (file_gmin != NULL) {
fp_gmin = fopen(file_gmin, "w+");
if (fp_gmin==NULL) verr("error on creating output file %s", file_gmin);
}
if (file_gplus != NULL) {
fp_gplus = fopen(file_gplus, "w+");
if (fp_gplus==NULL) verr("error on creating output file %s", file_gplus);
}
if (file_f2 != NULL) {
fp_f2 = fopen(file_f2, "w+");
if (fp_f2==NULL) verr("error on creating output file %s", file_f2);
}
if (file_pmin != NULL) {
fp_pmin = fopen(file_pmin, "w+");
if (fp_pmin==NULL) verr("error on creating output file %s", file_pmin);
}
if (file_f1plus != NULL) {
fp_f1plus = fopen(file_f1plus, "w+");
if (fp_f1plus==NULL) verr("error on creating output file %s", file_f1plus);
}
if (file_f1min != NULL) {
fp_f1min = fopen(file_f1min, "w+");
if (fp_f1min==NULL) verr("error on creating output file %s", file_f1min);
}
tracf = 1;
for (l = 0; l < Nfoc; l++) {
if (reci) f2 = fxsb;
else f2 = fxf;
for (i = 0; i < n2; i++) {
hdrs_out[i].fldr = l+1;
hdrs_out[i].sx = NINT(xsyn[l]*1000);
hdrs_out[i].offset = (long)NINT((f2+i*d2) - xsyn[l]);
hdrs_out[i].tracf = tracf++;
hdrs_out[i].selev = NINT(zsyn[l]*1000);
hdrs_out[i].sdepth = NINT(-zsyn[l]*1000);
hdrs_out[i].f1 = f1;
}
if (file_green != NULL) {
ret = writeData(fp_out, (float *)&green[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_gmin != NULL) {
ret = writeData(fp_gmin, (float *)&Gmin[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_gplus != NULL) {
ret = writeData(fp_gplus, (float *)&Gplus[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_f2 != NULL) {
ret = writeData(fp_f2, (float *)&f2p[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_pmin != NULL) {
ret = writeData(fp_pmin, (float *)&pmin[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_f1plus != NULL) {
/* rotate to get t=0 in the middle */
if (rotate==1) {
for (i = 0; i < n2; i++) {
hdrs_out[i].f1 = -n1*0.5*dt;
memcpy(&trace[0],&f1plus[l*size+i*nts],nts*sizeof(float));
for (j = 0; j < n1/2; j++) {
f1plus[l*size+i*nts+n1/2+j] = trace[j];
}
for (j = n1/2; j < n1; j++) {
f1plus[l*size+i*nts+j-n1/2] = trace[j];
}
}
}
ret = writeData(fp_f1plus, (float *)&f1plus[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
if (file_f1min != NULL) {
/* rotate to get t=0 in the middle */
if (rotate==1) {
for (i = 0; i < n2; i++) {
hdrs_out[i].f1 = -n1*0.5*dt;
memcpy(&trace[0],&f1min[l*size+i*nts],nts*sizeof(float));
for (j = 0; j < n1/2; j++) {
f1min[l*size+i*nts+n1/2+j] = trace[j];
}
for (j = n1/2; j < n1; j++) {
f1min[l*size+i*nts+j-n1/2] = trace[j];
}
}
}
ret = writeData(fp_f1min, (float *)&f1min[l*size], hdrs_out, n1, n2);
if (ret < 0 ) verr("error on writing output file.");
}
}
ret=0;
if (file_green != NULL) {ret += fclose(fp_out);}
if (file_gplus != NULL) {ret += fclose(fp_gplus);}
if (file_gmin != NULL) {ret += fclose(fp_gmin);}
if (file_f2 != NULL) {ret += fclose(fp_f2);}
if (file_pmin != NULL) {ret += fclose(fp_pmin);}
if (file_f1plus != NULL) {ret += fclose(fp_f1plus);}
if (file_f1min != NULL) {ret += fclose(fp_f1min);}
if (ret < 0) verr("err %d on closing output file",ret);
if (verbose) {
t1 = wallclock_time();
vmess("and CPU-time write data = %.3f", t1-t2);
}
/*================ free memory ================*/
free(hdrs_out);
exit(0);
}