/* wgc4.h - include file for WGC code-4 traces * * declarations for: *	typedef struct {} wgctrace - the trace header and data  * Author: zhiming li */ #ifndef WGC4_H#define WGC4_H#define	WGCHBYTES	400	/* Bytes in the WGC trace header */#define WGC_NFLTS	16384	/* Arbitrary limit on data array size	*/typedef struct {	/* wgc - trace identification header */	short fmati2;	/* wgc format code (byte 1-2) */	short sndxi2;	/* sample start index (byte 3-4) */	int idnti4;	/* ident number (byte 5-8) */	short itrci2;	/* trace number (byte 9-10) */	short cdfni2;	/* cdf number at midpoint (byte 11-12) */	short stkwi2;	/* stackword (byte 13-14) */	short elesi2;	/* elevation at source location (byte 15-16) */	int xcdsi4;	/* x-coordinate at source location (byte 17-20) */	int ycdsi4;	/* y-coordinate at source location (byte 21-24) */	short stcsi2;	/* static correction at source location (byte 25-26) */	short eledi2;	/* elevation at detector location (byte 27-28) */	int xcddi4;	/* x-coordinate at detector location (byte 29-32) */			/* or post-stack x-coordinate at centroid location */		int ycddi4;	/* y-coordinate at detector location (byte 33-36) */			/* or post-stack y-coordinate at centroid location */	short stcdi2;	/* static correction at detector location (byte 37-38)*/	short srddi2;	/* source to detector distance (byte 39-40)*/			/* or central angle or velocity 	*/	float trbfr4;	/* trace balance factor (byte 41-44)	*/	float stwfr4;	/* stack weight factor (byte 45-48) 	*/			/* or change of rms in percent	*/		short fxgvi2;   /* fixed gain value (byte 49-50) 	*/	short polci2;	/* polarity code (byte 51-52)	*/	short tmfsi2;	/* time of first sample (byte 53-54)	*/	short undefn;	/* undefined (byte 55-56)	*/	short shpti2;	/* shotpoint number (byte 57-58)	*/	short cdsci2;	/* cdf datum static correction (byte 59-60)	*/	short stnsi2;	/* station number at source location (byte 61-62) */	short stndi2;	/* station number at detector location (byte 63-64) */	short elemi2;	/* elevation at midpoint location (byte 65-66) */	short stnmi2;	/* station number at midpoint location (byte 67-68) */	short strti2;	/* start time (byte 69-70) */	short cblni2;	/* cable number (byte 71-72) */	short ivfci2;	/* input velocity function code (byte 73-74) */	short lsmbi2;	/* local status for muliple boat operations */			/* (byte 75-76) */	short rsmbi2;	/* remote status for muliple boat operations */			/* (byte 77-78) */	short cdsai2;	/* cdf datum static correction after application */			/* (byte 79-80) */	int frlni4;	/* field reel number or field shot identifier */			/* (byte 81-84) */	short fflni2;	/* field file number (byte 85-86) */	short fchni2;	/* field channel number (byte 87-88) */	short linei2;	/* line number within 3-d survey (byte 89-90) */	short mutei2;	/* mute time (byte 91-92) */	float pn3dr4;	/* shotpoint number within 3-d line (byte 93-96) */	short podmi2;	/* perpendicular offset distance from midpoint */			/* to profile (byte 97-98) */	short ppoai2;	/* perpendicular offset azimuth (byte 99-100) */	short edsli2;	/* elevation of datum at source location */			/* (byte 101-102) */	short eddli2;	/* elevation of datum at detector location */			/* (byte 103-104) */	short edmli2;	/* elevation of datum at midpoint location */			/* (byte 105-106) */	short ebwsi2;	/* elevation at base of weathering */			/* at source location (byte 107-108) */	short ebwdi2;	/* elevation at base of weathering */			/* at detecor location (byte 109-110) */	short ebwmi2;	/* elevation at base of weathering */			/* at midpoint location (byte 111-112) */	short ebssi2;	/* elevation at base of subweathering */			/* at source location (byte 113-114) */	short ebsdi2;	/* elevation at base of subweathering */			/* at detecor location (byte 115-116) */	short ebsmi2;	/* elevation at base of subweathering */			/* at midpoint location (byte 117-118) */	short drvsi2;	/* datum (replacement) velocity at */			/* at source location (byte 119-120) */	short drvdi2;	/* datum (replacement) velocity at */			/* at detector location (byte 121-122) */	short drvmi2;	/* datum (replacement) velocity at */			/* at midpoint location (byte 123-124) */	short vwlsi2;	/* velocity in weathering layer at */			/* at source location (byte 125-126) */	short vwldi2;	/* velocity in weathering layer at */			/* at detector location (byte 127-128) */	short vwlmi2;	/* velocity in weathering layer at */			/* at midpoint location (byte 129-130) */	short vslsi2;	/* velocity in subweathering layer at */			/* at source location (byte 131-132) */	short vsldi2;	/* velocity in subweathering layer at */			/* at detector location (byte 133-134) */	short vslmi2;	/* velocity in subweathering layer at */			/* at midpoint location (byte 135-136) */	short dpsri2;	/* depth of source at source location */			/* (byte 137-138) */	short dpdt;	/* depth of detector (byte 139-140) */	short lenci2;	/* length of charge (byte 141-142) */	short utsli2;	/* uphole time at source location (byte 143-144) */	short utdli2;	/* uphole time at detector location (byte 145-146) */	short utmli2;	/* uphole time at midpoint location (byte 147-148) */	float fscsr4;	/* field static correction at source location */			/* (byte 149-152) */	float fscdr4;	/* field static correction at detector location */			/* (byte 153-156) */	float fscmr4;	/* field static correction at midpoint location */			/* (byte 157-160) */		float rscsr4;	/* residual static correction at source location */			/* (byte 161-164) */	float rscdr4;	/* residual static correction at detector location */			/* (byte 165-168) */	float rscmr4;	/* residual static correction at midpoint location */			/* (byte 169-172) */	float wtdsr4;	/* water depth or water bottom reflection time */			/* at source location (byte 173-176) */			/* positive=depth   negative=time */	float wtddr4;	/* water depth or water bottom reflection time */			/* at detector location (byte 177-180) */			/* positive=depth   negative=time */	float wtdmr4;	/* water depth or water bottom reflection time */			/* at midpoint location (byte 181-184) */			/* positive=depth   negative=time */	float dfsmr4;	/* distance along profile from first survey station */			/* to midpoint location (byte 185-188) */			/* or refined first arrival time */	float dfssr4;	/* distance along profile from first survey station */			/* to source location (byte 189-192) */			/* or first break time */	float dsldr4;	/* distance along profile from source */			/* location to detector location (byte 193-196) */			/* positive - detector precedes source */			/* negative - detector follows source */	int snsli4;	/* station number at source location (byte 197-200) */	int sndli4;	/* station number at detector location (byte 201-204) */	int snmli4;	/* station number at midpoint location (byte 205-208) */	int cdnsi4;	/* cdf number at source location (byte 209-212) */	int cdndi4;	/* cdf number at detector location (byte 213-216) */	int cdnmi4;	/* cdf number at midpoint location (byte 217-220) */	float ssddr4;	/* signed source to detector distance (byte 221-224) */			/* positive - detector precedes source */			/* negative - detector follows source */	double xcslr8;	/* x-coordinate at source location (byte 225-232)  */	double xcdlr8;	/* x-coordinate at detector location (byte 232-240)  */	double xcmlr8;	/* x-coordinate at midpoint location (byte 241-248)  */			/* or poststack x-coordinate at centroid location */ 	double ycslr8;	/* y-coordinate at source location (byte 249-256)  */	double ycdlr8;	/* y-coordinate at detector location (byte 257-264)  */	double ycmlr8;	/* y-coordinate at midpoint location (byte 265-272)  */			/* or poststack y-coordinate at centroid location */ 	double xcelr8;	/* x-coordinate at cell center (byte 273-280)  */		double ycelr8;	/* y-coordinate at cell center (byte 281-288)  */		float srt1r4;	/* primary 3-d sort index (byte 289-292)  */		float srt2r4;	/* secondary 3-d sort index (byte 293-296)  */		float az3dr4;	/* 3-d azimuth (degree) (byte 297-300)  */		int ttypi4;	/* data trace type identification (byte 301-304)  */		char idspxx[16];/* shotpoint identification at midpoint */			/* location (byte 305-320) */ 	char lintxx[16];/* line intersection at midpoint */			/* location (byte 321-336) */ 	short sdrsi2;	/* depth of source at detector location */			/* (byte 337-338)  */	short exbfi2;	/* exception bit-flags (byte 339-340)  */	float sptrr4;	/* shotpoint number (byte 341-344)  */	double stacr8;	/* station number at midpoint location (byte 345-352) */	float lbhar4;	/* local borehole azimuth for vsp (byte 353-356) */	float lbhdr4;	/* local borehole deviation for vsp (byte 357-360) */			/* or inline dip */	float atrar4;	/* azimuth of tool reference axis for vsp */			/* (byte 361-364) */			/* or crossline dip */	int itodi4;	/* time of day (byte 365-368) */	float ptimr4;	/* pick time/static (byte 369-372) */	float pqalr4;	/* pick quality (byte 373-376) */	float rfs1r4;	/* reserved for special use (byte 377-380) */	float rfs2r4;	/* reserved for special use (byte 381-384) */	int fdrni4;	/* field reel number (byte 385-388) */	char rffd[12];  /* reserved for future development (byte 389-400) */ 	float  data[WGC_NFLTS];} wgc4, wgc4trace;#endif