stf.c 10 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];
35
	extern int TRKILL_STF, NORMALIZE, USE_WORKFLOW, WORKFLOW_STAGE;
Tilman Steinweg's avatar
Tilman Steinweg committed
36
37
38
39
40
	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
		kill_tmp = imatrix(1,ntr_glob,1,nshots);
		kill_vector = ivector(1,ntr_glob);
		
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
        if(USE_WORKFLOW){
            sprintf(trace_kill_file,"%s_%i.dat",TRKILL_FILE_STF,WORKFLOW_STAGE);
            ftracekill=fopen(trace_kill_file,"r");
            if (ftracekill==NULL){
                sprintf(trace_kill_file,"%s.dat",TRKILL_FILE_STF);
                ftracekill=fopen(trace_kill_file,"r");
                if (ftracekill==NULL){
                    err(" Trace kill file could not be opened!");
                }
            }
        }else{
            sprintf(trace_kill_file,"%s.dat",TRKILL_FILE_STF);
            ftracekill=fopen(trace_kill_file,"r");
            if (ftracekill==NULL){
                err(" Trace kill file could not be opened!");
            }
        }
84
85
86
87
88
89
90
91
92
93
94
		
		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++){
95
96
			kill_vector[h] = kill_tmp[i][ishot];
			h++;
Tilman Steinweg's avatar
Tilman Steinweg committed
97
		}
98
	} /* end if(TRKILL_STF)*/
Tilman Steinweg's avatar
Tilman Steinweg committed
99
100
101
102
103
104
105
	
	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++){
106
107
108
109
					sectionvy[i][j]=0.0;
					sectionvy_obs[i][j]=0.0;
				}
			}
110
		if(i==ntr_glob)printf(" ***** \n\n");
Tilman Steinweg's avatar
Tilman Steinweg committed
111
		}
112
	}
Tilman Steinweg's avatar
Tilman Steinweg committed
113
114
	/* trace killing ends here */
	
115
	if(TIMEWIN==1){
116
117
		time_window_glob(sectionvy, iter, ntr_glob, ns, ishot);
		time_window_glob(sectionvy_obs, iter, ntr_glob, ns, ishot);
118
119
	}
	
Tilman Steinweg's avatar
Tilman Steinweg committed
120
	/* NORMALIZE TRACES */
121
122
123
124
	if(NORMALIZE==1){
		normalize_data(sectionvy,ntr_glob,ns);
		normalize_data(sectionvy_obs,ntr_glob,ns);
	}
Tilman Steinweg's avatar
Tilman Steinweg committed
125
126
127
128
129
130
131
132
133
134
	
	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];
	
135
	
Tilman Steinweg's avatar
Tilman Steinweg committed
136
	/* TF Software: see libstfinv */
137
	
Tilman Steinweg's avatar
Tilman Steinweg committed
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
	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);
170
	
Tilman Steinweg's avatar
Tilman Steinweg committed
171
172
173
174
175
	runstfinvengine();
	
	/* END TF Software */
	
	
176
	psource=vector(1,ns);
Tilman Steinweg's avatar
Tilman Steinweg committed
177
	
178
179
180
181
	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
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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
	
	/* 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++) */	
254
255
	
	
Tilman Steinweg's avatar
Tilman Steinweg committed
256
257
258
	/* convolving wavelet with STF */
	conv_FD(wavelet,source_time_function,stf_conv_wavelet,ns);
	
259
	if(TAPER_STF)
260
		taper(stf_conv_wavelet, ns, fc);
Tilman Steinweg's avatar
Tilman Steinweg committed
261
	
262
263
264
265
266
267
268
269
270
271
272
// 	/* --------------- 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
273
	/* --------------- writing out the source time function --------------- */
274
275
276
277
	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
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
	}
	
	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){
297
298
		free_imatrix(kill_tmp,1,ntr_glob,1,nshots);
		free_ivector(kill_vector,1,ntr_glob);
Tilman Steinweg's avatar
Tilman Steinweg committed
299
	}
300
}