SegD标准头文件定义

/* Copyright (c) Colorado School of Mines, 2003.*/ /* All rights reserved. */ /*----------------------------------------------------------------------- * segd.h - include file for SEGD traces * Version 2.1, 10/10/94, Marc Schaming * Version 2.2, 17/08/95, Celine Girard et Marc Schaming * Version 2.3, 04/1997, Marc Schaming * Version 2.4, 02/1998, Stewart A. Levin (SEP) * changed general_header_1.f to unsigned char[2] * changed non-struct typedefs to struct typedefs * to allow for uniform future expansion * Version 2.5, 02/2001, Stewart A. Levin (SEP) * Little endian fix up for channel_set_header.cs * and dem_trace_header,tn * * declarations for: 版本1 版本2 * typedef struct {} segd_tape_label : 无 tape label * typedef struct {} segd_general_header_1 : general header 与1相同 * typedef struct {} segd_general_header_2 : general header 与1相同 * typedef struct {} segd_general_header_n : general header 与1相同 * typedef struct {} segd_gen_head_sn358 : general header for sn358 * typedef struct {} segd_channel_set_header: channel set descriptor 与1相同，29字节稍扩展 * typedef struct {} segd_sample_skew : sample skew block * typedef struct {} segd_extended_header : extended header * typedef struct {} segd_external_header : external header * typedef struct {} segd_general_trailer : general trailer 与1相同 * typedef struct {} segd_demux_trace_header: Demux trace header 与1相同 * typedef struct {} segd_trace_header_ext : trace header extension 长度相同，做了扩展 * typedef struct {} segd_general_trailer : general trailer 与1相同 * * * Reference: * SEG Subcommitee on Digital Tape Formats, "Digital field tape format standards - SEG-D" * * Digital field tape format standards - SEG-D, REVISION 1 (1994) Geophysics, vol. 59, p.668-684 * * 版本2中在开始位置比版本1多记录了128字节的磁带标签信息，指明了该磁带的一些记录参数和格式信息， * 其中5~9字节内容为“SD2.0”，说明为SegD版本2格式。 * *---------------------------------------------------------------------*/ /*---------------- General header block #1 -------------------------*/ typedef struct { unsigned char f[2]; /* 01-02 File number (0-9999) */ unsigned short y; /* 03-04 Format code */ char k1_k2; /* 05 General constants */ char k3_k4; /* 06 General constants */ char k5_k6; /* 07 General constants */ char k7_k8; /* 08 General constants */ char k9_k10; /* 09 General constants */ char k11_k12; /* 10 General constants */ unsigned char yr; /* 11 Year (0-99) */ unsigned char gh_dy1; /* 12 Number blocks in general header */ /* 12 - day of year (x--) */ unsigned char dy; /* 13 Day of year (xx) */ unsigned char h; /* 14 Hour of day */ unsigned char mi; /* 15 Minute of hour */ unsigned char se; /* 16 Second of minute */ unsigned char m[3]; /* 17 Manufacturer's code */ /* 18-19 and serial number */ unsigned char b[3]; /* 20-22 Bytes per scan (multiplexed only) */ unsigned char i; /* 23 Base scan interval */ unsigned char p_sbx; /* 24 Polarity */ /* 24 - Number of scans per block */ unsigned char sb; /* 25 Number of scans per block */ unsigned char z_r1; /* 26 Record type */ /* 26 - Record length */ unsigned char r; /* 27 Record length */ unsigned char str; /* 28 Scan types per record */ unsigned char cs; /* 29 Channels sets per scan type */ unsigned char sk; /* 30 Skew blocks */ unsigned char ec; /* 31 Extended header length */ unsigned char ex; /* 32 External header length */ } segd_general_header_1; /*---------------- General header block #2 -------------------------*/ typedef struct { unsigned char ef[3]; /* 01-03 Extended file number */ unsigned char en[2]; /* 04-05 Extended channel sets and scan types */ unsigned char ecx[2]; /* 06-07 Extended header blocks */ unsigned char eh[2]; /* 08-09 external header blocks */ char x1; /* 10 undefined */ unsigned char rev[2]; /* 11-12 SEG-D revision number */ unsigned short gt; /* 13-14 General trailer number */ unsigned char erl[3]; /* 15-17 Extended record length */ char x2; /* 18 undefined */ unsigned char bn; /* 19 General header block number */ char x3[13]; /* 20-32 undefined */ } segd_general_header_2; /*---------------- General header block #n -------------------------*/ typedef struct { char x1[3]; /* 01-03 undefined */ unsigned char sln[5]; /* 04-08 Source line number，4-5为整数部分，7-8为小数部分 */ unsigned char spn[5]; /* 09-13 Source point number，9-11为整数部分，12-13为小数部分 */ unsigned char spi; /* 14 Source point index */ unsigned char pc; /* 15 Phase control */ unsigned char v; /* 16 Type vibrator */ short pa; /* 17-18 Phase angle */ unsigned char bn; /* 19 General header block number */ unsigned char ss; /* 20 Source set number */ char x2[12]; /* 21-32 undefined */ } segd_general_header_n; /*---------------- General header extension (Sercel SN358) ---------*/ typedef struct { unsigned char fc1; /* 01 first and last channel of seismic param 1 */ unsigned char lc1; /* 01-02 last channel of seismic param 1 */ unsigned char fc2; /* 03-04 first channel of seismic param 2 */ unsigned char f_lc2; /* 03-04 first and last channel of seismic param 2 */ unsigned char lc2; /* 04-05 last channel of seismic param 2 */ unsigned char fc3; /* 06-07 first channel of seismic param 3 */ unsigned char f_lc3; /* 07 fist and last channel of seismic param 3 */ unsigned char lc3; /* 07-08 last channel of seismic param 3 */ unsigned char fc4; /* 09-10 first channel of seismic param 4 */ unsigned char f_lc4; /* 10 first and last channel of seismic param 4 */ unsigned char lc4; /* 10-11 fist channel of seismic param 4 */ unsigned char f_lac1; /* 12 first and last aux channel of scan type 1 */ unsigned char fsc1; /* 13-14 first seismic channel of scan type 1 */ unsigned char f_lsc1; /* 14 first and last seismic channel of scan type 1 */ unsigned char lsc1; /* 14-15 last seismic channel of scan type 1 */ unsigned char sam_int1; /* 16 sample interval of scan type 1 */ unsigned char fac2; /* 17 first and last aux channel of scan type 2 */ unsigned char fsc2; /* 18-19 first seismic channel of scan type 2 */ unsigned char f_lsc2; /* 19 first and last seismic channel of scan type 2 */ unsigned char lsc2; /* 19-20 last seismic channel of scan type 2 */ unsigned char sam_int2; /* 21 sample interval of scan type 2 */ unsigned char bl_sig_le; /* 22 block signature length (n*0.1 s) */ unsigned char rec_length[2]; /* 23-24 record length n*0.1 s (00.0-99.9) s */ unsigne