outseis_glob.c 9.14 KB
Newer Older
tilman.metz's avatar
tilman.metz committed
1
/*-----------------------------------------------------------------------------------------
2
 * Copyright (C) 2016  For the list of authors, see file AUTHORS.
tilman.metz's avatar
tilman.metz 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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321
 *
 * 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>.
-----------------------------------------------------------------------------------------*/

/*------------------------------------------------------------------------
 *   Write seismograms to disk                                  
 *   last update 19/01/02, T. Bohlen
 *  ----------------------------------------------------------------------*/
#include "fd.h"
#include "segy.h"

void  outseis_glob(FILE *fp, FILE *fpdata, int comp, float **section,
int **recpos, int **recpos_loc, int ntr, float ** srcpos,
int nsrc, int ns, int seis_form, int ishot, int sws){

	/* declaration of extern variables */
	extern int NDT;
	extern float  TIME, DH, DT, REFREC[4];

	const float xshift=800.0, yshift=800.0;


	/* declaration of local variables */
	int i,j,ndt,ns2,nt,lsamp;
	segy tr;
	int tracl1 ;
	float xr, yr, x, y;
	float XS=0.0, YS=0.0;
	
	
	nt=iround(TIME/DT);
	if (sws==1){	/* parameter NDT is used */
		ndt=NDT;
		ns2=iround(nt/NDT);}
	else{ 
		ndt=1;
		ns2=ns;}

	
	
	
	
	/* source coordinates are written into trace header fields */
	XS=srcpos[1][ishot];	
	YS=srcpos[2][ishot];	
		
	
	switch(seis_form){
	case 1 :
		for(tracl1=1;tracl1<=ntr;tracl1++){        /*SEGY (without file-header)*/
         		xr=recpos[1][tracl1]*DH;
         		yr=recpos[2][tracl1]*DH;
         		x=xr-REFREC[1];
         		y=yr-REFREC[2];
			/*tr.tracl=(int)recpos[3][tracl1];*/
			tr.tracl=(int)tracl1;
			tr.ep=comp;     
			tr.cdp=(int)recpos[3][tracl1];
			tr.trid=(short)1;           /* trace identification code: 1=seismic*/
			tr.offset=(signed int)iround(sqrt((XS-xr)*(XS-xr)
                                  +(YS-yr)*(YS-yr))*1000.0);
			tr.gelev=(signed int)iround(yr*1000.0);
			tr.sdepth=(signed int)iround(YS*1000.0);   /* source depth (positive) */
                        /* angle between receiver position and reference point
                           (sperical coordinate system: swdep=theta, gwdep=phi) */
			tr.swdep=iround(((360.0/(2.0*PI))*atan2(x-xshift,y-yshift))*1000.0);
			/*tr.scalel=(signed short)-3;*/
			tr.scalel=(signed short)-1000;
			/*tr.scalco=(signed short)-3;*/
			tr.scalco=(signed short)-1000;
			tr.sx=(signed int)iround(XS*1000.0);  /* X source coordinate */

			        /* group coordinates */
			tr.gx=(signed int)iround(xr*1000.0);

			tr.ns=(unsigned short)ns2; /* number of samples in this trace */
			tr.dt=(unsigned short)iround(((float)ndt*DT)*1.0e6); /* sample interval in micro-seconds */
			/*tr.d1=(float)(TIME/ns2);*/        /* sample spacing for non-seismic data */
			tr.d1=(float)tr.dt*1.0e-6;
			
			tr.tracr=0	;	/* trace sequence number within reel */

			tr.fldr=0       ;	/* field record number */

			tr.tracf=0      ;	/* trace number within field record */

			tr.ep=0         ;	/* energy source point number */

			tr.cdpt=0       ;	/* trace number within CDP ensemble */

	
			tr.nvs=0       	;   /* number of vertically summed traces (see vscode
			   			in bhed structure) */

			tr.nhs=0       	;   /* number of horizontally summed traces (see vscode
			  			in bhed structure) */

			tr.duse=0     	;   /* data use:
						1 = production
						2 = test */

			tr.selev=0     	; /* source elevation from sea level
			   			(above sea level is positive) */

			tr.gdel=0      	; /* datum elevation at receiver group */

			tr.sdel=0      	; /* datum elevation at source */

			tr.gwdep=0     	; /* water depth at receiver group */

			
			tr.sy= (signed int)iround(YS*1000.0)    ;   /* Y source coordinate */

	
			tr.gy= (signed int)iround(yr*1000.0)    ;   /* Y group coordinate */

			tr.counit=0    	;   /* coordinate units code:
						for previous four entries
						1 = length (meters or feet)
						2 = seconds of arc (in this case, the
						X values are longitude and the Y values
						are latitude, a positive value designates
						the number of seconds east of Greenwich
						or north of the equator */

			tr.wevel=0     ;	/* weathering velocity */

			tr.swevel=0    ;	/* subweathering velocity */

			tr.sut=0       ;	/* uphole time at source */

			tr.gut=0       ;	/* uphole time at receiver group */

			tr.sstat=0     ;	/* source static correction */

			tr.gstat=0     ;	/* group static correction */

			tr.tstat=0     ;	/* total static applied */

			tr.laga=0      ; /* lag time A, time in ms between end of 240-
			   			byte trace identification header and time
			   			break, positive if time break occurs after
			   			end of header, time break is defined as
			   			the initiation pulse which maybe recorded
			   			on an auxiliary trace or as otherwise
			   			specified by the recording system */

			tr.lagb=0     	; /* lag time B, time in ms between the time break
			   			and the initiation time of the energy source,
			   			may be positive or negative */

			tr.delrt=0     	; /* delay recording time, time in ms between
			   			initiation time of energy source and time
			   			when recording of data samples begins
			   			(for deep water work if recording does not
			   			start at zero time) */

			tr.muts=0      ; /* mute time--start */

			tr.mute=0      ; /* mute time--end */

	
			tr.gain=0      ; /* gain type of field instruments code:
						1 = fixed
						2 = binary
						3 = floating point
						4 ---- N = optional use */

			tr.igc=0       ; /* instrument gain constant */

			tr.igi=0       ; /* instrument early or initial gain */

			tr.corr=0      ; /* correlated:
						1 = no
						2 = yes */

			tr.sfs=0       ; /* sweep frequency at start */

			tr.sfe=0       ; /* sweep frequency at end */

			tr.slen=0      ; /* sweep length in ms */

			tr.styp=0      ; /* sweep type code:
						1 = linear
						2 = cos-squared
						3 = other */

			tr.stas=0      	; /* sweep trace length at start in ms */

			tr.stae=0      	; /* sweep trace length at end in ms */

			tr.tatyp=0     	; /* taper type: 1=linear, 2=cos^2, 3=other */

			tr.afilf=0     	; /* alias filter frequency if used */

			tr.afils=0     	; /* alias filter slope */

			tr.nofilf=0    	; /* notch filter frequency if used */

			tr.nofils=0   	; /* notch filter slope */

			tr.lcf=0      	; /* low cut frequency if used */

			tr.hcf=0      	; /* high cut frequncy if used */

			tr.lcs=0       	; /* low cut slope */

			tr.hcs=0       	; /* high cut slope */

			tr.year=0      	; /* year data recorded */

			tr.day=0       	; /* day of year */

			tr.hour=0     	; /* hour of day (24 hour clock) */

			tr.minute=0    	; /* minute of hour */

			tr.sec=0       	; /* second of minute */

			tr.timbas=0    	; /* time basis code:
						1 = local
						2 = GMT
						3 = other */

			tr.trwf=0      	; /* trace weighting factor, defined as 1/2^N
			   			volts for the least sigificant bit */

			tr.grnors=0   	; /* geophone group number of roll switch
			   			position one */

			tr.grnofr=0    	; /* geophone group number of trace one within
			   			original field record */

			tr.grnlof=0    	; /* geophone group number of last trace within
			   			original field record */

			tr.gaps=0      	;  /* gap size (total number of groups dropped) */

			tr.otrav=0     	;  /* overtravel taper code:
						1 = down (or behind)
						2 = up (or ahead) */

			/* local assignments */

			tr.f1=0.0;	/* first sample location for non-seismic data */

			tr.d2=0.0;	/* sample spacing between traces */

			tr.f2=0.0;	/* first trace location */

			tr.ungpow=0.0;	/* negative of power used for dynamic
			   			range compression */

			tr.unscale=0.0;	/* reciprocal of scaling factor to normalize
			   			range */
			tr.ntr=0      ;   /* number of traces */

			tr.mark=0     ;
			
			if (sws==0){		
				for(j=1;j<=ns;j++) tr.data[j]=section[tracl1][j];}
			else{
				lsamp=0;
				for(j=1;j<=ns2;j++){
					lsamp +=NDT;
					tr.data[j]=section[tracl1][lsamp];}
			}

			fwrite(&tr,240,1,fpdata);
			fwrite(&tr.data[1],4,ns2,fpdata);
		}
		break;


	case 2 :
		for(i=1;i<=ntr;i++){         /*ASCII ONE COLUMN*/
			if (sws==0){
				for(j=1;j<=ns;j++) fprintf(fpdata,"%e\n", section[i][j]);}
			else{
				lsamp=0;
				for(j=1;j<=ns2;j++){
					lsamp+=NDT;
					fprintf(fpdata,"%e\n", section[i][lsamp]);}
			}
		}
		break;

	case 3 :                             /*BINARY */

		for(i=1;i<=ntr;i++){
			if(sws==0){
				for(j=1;j<=ns;j++){
					fwrite(&section[i][j],sizeof(float),1,fpdata); }}
			else{
				lsamp=0;
				for(j=1;j<=ns2;j++){
					lsamp+=NDT;
					fwrite(&section[i][lsamp],sizeof(float),1,fpdata); }}}
		break;

	default :
		fprintf(fp," Don't know data format for seismograms !\n");
		fprintf(fp," No output written. ");
	}

	fclose(fpdata);
}