stf.c 9.42 KB
Newer Older
Tilman Steinweg's avatar
Tilman Steinweg committed
1
/*-----------------------------------------------------------------------------------------
Florian Wittkamp's avatar
Florian Wittkamp committed
2
 * Copyright (C) 2016  For the list of authors, see file AUTHORS.
Tilman Steinweg's avatar
Tilman Steinweg committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
 *
 * This file is part of DENISE.
 * 
 * DENISE 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, version 2.0 of the License only.
 * 
 * DENISE 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 DENISE. See file COPYING and/or <http://www.gnu.org/licenses/gpl-2.0.html>.
-----------------------------------------------------------------------------------------*/

/*------------------------------------------------------------------------
 *   inversion for source time function 
 *   31. August 2011 L. Rehor, T. Forbriger, M. Schaefer
 *  ----------------------------------------------------------------------*/

#include "fd.h"
#include "stfinv/stfinv.h"
#include "segy.h"

void stf(FILE *fp, float **sectionvy, float ** sectionvy_obs, float ** sectionvy_conv, float * source_time_function, int  **recpos, int  **recpos_loc, 
int ntr_glob,int ntr, float ** srcpos, int ishot, int ns, int iter, int nshots, float FC){ 

	/* declaration of global variables */
	extern float DT, DH;
33
	extern int SEIS_FORMAT, MYID, NT, QUELLART, TIME_FILT, TIMEWIN, TAPER_STF;
34
	extern char  SEIS_FILE_VY[STRING_SIZE], SEIS_FILE_P[STRING_SIZE], PARA[STRING_SIZE], DATA_DIR[STRING_SIZE];
Tilman Steinweg's avatar
Tilman Steinweg committed
35 36 37 38 39 40
	extern int TRKILL_STF, NORMALIZE;
	extern char TRKILL_FILE_STF[STRING_SIZE];
	extern char SIGNAL_FILE[STRING_SIZE];
	
	/* declaration of variables for trace killing */
	int ** kill_tmp, *kill_vector, h, j;
41
	char trace_kill_file[STRING_SIZE];
Tilman Steinweg's avatar
Tilman Steinweg committed
42 43 44 45 46 47 48
	FILE *ftracekill;
	
	/* --------------- declaration of variables --------------- */
	unsigned int nrec, nsamp, i, npairs;
	float dt;
	float xr=0.0, yr=0.0;
	float XS=0.0, YS=0.0;
49
	char conv_y[STRING_SIZE], qw[STRING_SIZE], conv_y_tmp[STRING_SIZE], obs_y_tmp[STRING_SIZE], mod_y_tmp[STRING_SIZE];
Tilman Steinweg's avatar
Tilman Steinweg committed
50 51 52 53 54
	
	/* variables for wavelet */
	int nt, nts;
	float tshift, amp=0.0, fc, tau, t, ts, ag;
	float * wavelet, * stf_conv_wavelet, *psource=NULL;
55
	
Tilman Steinweg's avatar
Tilman Steinweg committed
56 57 58 59 60 61 62 63
	wavelet=vector(1,ns);
	stf_conv_wavelet=vector(1,ns);
	
	printf("\n================================================================================================\n\n");
	printf("\n ***** Inversion of Source Time Function - shot: %d - it: %d ***** \n\n",ishot,iter);
	
	/* if TRKILL_STF==1 a trace killing is applied */
	if(TRKILL_STF){
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
		kill_tmp = imatrix(1,ntr_glob,1,nshots);
		kill_vector = ivector(1,ntr_glob);
		
		ftracekill=fopen(TRKILL_FILE_STF,"r");
		
		if (ftracekill==NULL) err(" Trace kill file could not be opened!");
		
		for(i=1;i<=ntr_glob;i++){
			for(j=1;j<=nshots;j++){
				fscanf(ftracekill,"%d",&kill_tmp[i][j]);
			}
		}
		
		fclose(ftracekill);
		
		h=1;
		for(i=1;i<=ntr_glob;i++){
81 82
			kill_vector[h] = kill_tmp[i][ishot];
			h++;
Tilman Steinweg's avatar
Tilman Steinweg committed
83
		}
84
	} /* end if(TRKILL_STF)*/
Tilman Steinweg's avatar
Tilman Steinweg committed
85 86 87 88 89 90 91
	
	if(TRKILL_STF){
		for(i=1;i<=ntr_glob;i++){
		if(i==1)printf("\n ***** Trace killing is applied for trace: ***** \n ***** \t");
			if(kill_vector[i]==1){
				printf("%d \t",i);
				for(j=1;j<=ns;j++){
92 93 94 95
					sectionvy[i][j]=0.0;
					sectionvy_obs[i][j]=0.0;
				}
			}
96
		if(i==ntr_glob)printf(" ***** \n\n");
Tilman Steinweg's avatar
Tilman Steinweg committed
97
		}
98
	}
Tilman Steinweg's avatar
Tilman Steinweg committed
99 100
	/* trace killing ends here */
	
101
	if(TIMEWIN==1){
102 103
		time_window_glob(sectionvy, iter, ntr_glob, ns, ishot);
		time_window_glob(sectionvy_obs, iter, ntr_glob, ns, ishot);
104 105
	}
	
Tilman Steinweg's avatar
Tilman Steinweg committed
106
	/* NORMALIZE TRACES */
107 108 109 110
	if(NORMALIZE==1){
		normalize_data(sectionvy,ntr_glob,ns);
		normalize_data(sectionvy_obs,ntr_glob,ns);
	}
Tilman Steinweg's avatar
Tilman Steinweg committed
111 112 113 114 115 116 117 118 119 120
	
	nrec=(unsigned int)ntr_glob;
	nsamp=(unsigned int)ns;
	dt=DT;
	npairs=nrec;
	
	/* source coordinates are written into trace header fields */
	XS=srcpos[1][ishot];	
	YS=srcpos[2][ishot];
	
121
	
Tilman Steinweg's avatar
Tilman Steinweg committed
122
	/* TF Software: see libstfinv */
123
	
Tilman Steinweg's avatar
Tilman Steinweg committed
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
	struct CTriples data;
	data.n=nrec;
	data.triples=(struct CWaveformTriple *)malloc(nrec*sizeof(struct CWaveformTriple));
	if (data.triples == NULL) {abort();}
	for (i=0;i<nrec;i++){
	
		xr=recpos[1][i+1]*DH;
		yr=recpos[2][i+1]*DH;
		
		data.triples[i].data=&sectionvy_obs[i+1][1];
		
		data.triples[i].synthetics=&sectionvy[i+1][1];
		
		data.triples[i].convolvedsynthetics=&sectionvy_conv[i+1][1];
		
		data.triples[i].header.sx=(unsigned int)iround(XS*1000.0);  /* X source coordinate */
		data.triples[i].header.sy=0.0;
		data.triples[i].header.sz=(unsigned int)iround(YS*1000.0);  /* source depth (positive) */
		data.triples[i].header.rx=(unsigned int)iround(xr*1000.0);  /* group coordinates */
		data.triples[i].header.ry=0.0;
		data.triples[i].header.rz=(unsigned int)iround(yr*1000.0);
		data.triples[i].header.sampling.n=nsamp;
		data.triples[i].header.sampling.dt=dt;
	}
	
	struct CWaveform stf;
	stf.series = &source_time_function[1];
	stf.sampling.n=nsamp;
	stf.sampling.dt=dt;
	
	
	initstfinvengine(data, stf, PARA);
156
	
Tilman Steinweg's avatar
Tilman Steinweg committed
157 158 159 160 161
	runstfinvengine();
	
	/* END TF Software */
	
	
162
	psource=vector(1,ns);
Tilman Steinweg's avatar
Tilman Steinweg committed
163
	
164 165 166 167
	if (QUELLART==3) psource=rd_sour(&nts,fopen(SIGNAL_FILE,"r"));
	if (QUELLART==7){
		inseis_source_wavelet(psource,ns,ishot);
	}
Tilman Steinweg's avatar
Tilman Steinweg committed
168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
	
	/* calculating wavelet SIN**3 for convoling with STF */
	tshift=srcpos[4][ishot];
	fc=srcpos[5][ishot];
	ts=1.0/fc;
	for (nt=1;nt<=ns;nt++){
		t=(float)nt*DT;
		switch (QUELLART){
					case 1 : 
						/* Old Ricker Wavelet */
						/* tau=PI*(t-ts-tshift)/(1.5*ts);
						amp=(((1.0-4.0*tau*tau)*exp(-2.0*tau*tau))); */ 

						/* New Ricker Wavelet, equal to SOFI2D */
						tau=PI*(t-1.5*ts-tshift)/(ts);
						amp=(((1.0-2.0*tau*tau)*exp(-tau*tau)));
					break;
					case 2 : 
						if ((t<tshift) || (t>(tshift+ts))) amp=0.0;
						else amp=((sin(2.0*PI*(t-tshift)*fc) 
			    				-0.5*sin(4.0*PI*(t-tshift)*fc)));

						/*amp=((sin(2.0*PI*(t+tshift)*fc) 
			    			-0.5*sin(4.0*PI*(t+tshift)*fc)));*/
					break;
					case 3 : 
						if (nt<=nts) amp=psource[nt]; 
						else amp=0.0;
// 						amp=psource[nt];
					break;  /* source wavelet from file SOURCE_FILE */
					case 4 : 
						/*tau=PI*(t-ts-tshift)/(1.5*ts);*/ /* Ricker */
						/*amp=((t-ts-tshift)*exp(-2.0*tau*tau));*/
						
						if ((t<tshift) || (t>(tshift+ts))) amp=0.0;
						else amp=pow(sin(PI*(t+tshift)/ts),3.0);
						break; /* sinus raised to the power of three */
						
					break; 
					case 5 : 
				                /* first derivative of a Gaussian */
				                ts=1.2/fc;
					        ag  = PI*PI*fc*fc;
			                        amp = - 2.0 * ag * (t-ts) * exp(-ag*(t-ts)*(t-ts));
					break;					
					case 6 : 
					        /* Bandlimited Spike */
						amp=0.0;
						if(nt==1+iround(tshift/DT)){
						amp = 1.0;}
					break; 
					case 7 :
					        /* source wavelet from file SOURCE_FILE */ 
						amp=psource[nt];
					break;  
					case 8 :
					        /* integral of sinus raised to the power of three */
						if (t<tshift) {
							 amp=0.0;}
						if ((t>=tshift) && (t<=(tshift+ts))){
							amp=(ts/(0.75*PI))*(0.5-0.75*cos(PI*(t-tshift)/ts)+0.25*pow(cos(PI*(t-tshift)/ts),3.0));}
						if (t>(tshift+ts))
							{amp=ts/(0.75*PI);}
						break;                                                                                                                                           	
					default : 
						err("Which source-wavelet ? ");
					
					
		}/* end of switch (QUELLART)  */
		wavelet[nt]=amp;
		
	}/*  end of for (nt=1;nt<=ns;nt++) */	
240 241
	
	
Tilman Steinweg's avatar
Tilman Steinweg committed
242 243 244
	/* convolving wavelet with STF */
	conv_FD(wavelet,source_time_function,stf_conv_wavelet,ns);
	
245
	if(TAPER_STF)
246
		taper(stf_conv_wavelet, ns, fc);
Tilman Steinweg's avatar
Tilman Steinweg committed
247
	
248 249 250 251 252 253 254 255 256 257 258
// 	/* --------------- writing out the observed seismograms --------------- */
// 	sprintf(obs_y_tmp,"%s.shot%d.obs",SEIS_FILE_P,ishot);
// 	printf(" PE %d is writing %d observed seismograms (vy) for shot = %d to\n\t %s \n",MYID,ntr_glob,ishot,obs_y_tmp);
// 	outseis_glob(fp,fopen(obs_y_tmp,"w"),1,sectionvy_obs,recpos,recpos_loc,ntr_glob,srcpos,0,ns,SEIS_FORMAT,ishot,0);
// 	
// 	/* --------------- writing out the modelled seismograms --------------- */
// 	sprintf(mod_y_tmp,"%s.shot%d.mod",SEIS_FILE_P,ishot);
// 	printf(" PE %d is writing %d modelled seismograms (vy) for shot = %d to\n\t %s \n",MYID,ntr_glob,ishot,mod_y_tmp);
// 	outseis_glob(fp,fopen(mod_y_tmp,"w"),1,sectionvy,recpos,recpos_loc,ntr_glob,srcpos,0,ns,SEIS_FORMAT,ishot,0);
	
	
Tilman Steinweg's avatar
Tilman Steinweg committed
259
	/* --------------- writing out the source time function --------------- */
260 261 262 263
	if((TIME_FILT==1)||(TIME_FILT==2)){
		sprintf(qw,"%s.shot%d_%dHz",SIGNAL_FILE,ishot,(int)FC);
		printf(" PE %d is writing source time function for shot = %d to\n\t %s \n",MYID,ishot,qw);
		outseis_vector(fp,fopen(qw,"w"),1,stf_conv_wavelet,recpos,recpos_loc,ntr,srcpos,0,ns,SEIS_FORMAT,ishot,0);
Tilman Steinweg's avatar
Tilman Steinweg committed
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282
	}
	
	sprintf(qw,"%s.shot%d",SIGNAL_FILE,ishot);
	printf(" PE %d is writing source time function for shot = %d to\n\t %s \n",MYID,ishot,qw);
	outseis_vector(fp,fopen(qw,"w"),1,stf_conv_wavelet,recpos,recpos_loc,ntr,srcpos,0,ns,SEIS_FORMAT,ishot,0);
	
	/*sprintf(conv_y_tmp,"%s.shot%d.forward",SEIS_FILE_VY,ishot);
	printf(" PE %d is writing %d seismograms (vy) for shot = %d to\n\t %s \n",MYID,ntr_glob,ishot,conv_y_tmp);
	outseis_glob(fp,fopen(conv_y_tmp,"w"),1,sectionvy,recpos,recpos_loc,ntr_glob,srcpos,0,ns,SEIS_FORMAT,ishot,0);*/
	
	/*freestfinvengine();
	free(data.triples);*/
	
	free_vector(wavelet,1,ns);
	free_vector(stf_conv_wavelet,1,ns);
	free_vector(psource,1,ns);
	
	/* free memory for trace killing */
	if(TRKILL_STF){
283 284
		free_imatrix(kill_tmp,1,ntr_glob,1,nshots);
		free_ivector(kill_vector,1,ntr_glob);
Tilman Steinweg's avatar
Tilman Steinweg committed
285
	}
286
}