SEGZ-Format-Definition-V1
# The preceding line is a mandatory identifier.
# It "has" to be the first line of the file or the file is not valid.

 SECTION SEGZ-parameters
# SECTION is the keyword identifier for the beginning of a section
# Comment - This header defines a normal SEGY file
  Name,             Length, Description
  Textual-header,     3200, SEGY Rev(0) Default length of character line header (bytes)
  File-header,         400, Length of binary line header (bytes)
  Trace-header,        240, Length of trace header (bytes)
  Name,               Type, Description
  TRACE_SAMP_FORMAT, IEEE4, Format 6 in the binary header over rides the value in binary header
  Endianess,           BIG, Big Endian data suitable for SUN type computers
 ENDSECTION

 SECTION File-header-definition
  Name,                    Byte, Type,Vector,Scalar,Addend,Description
  LINE_ID,                    1, ASCII,12,1,0,Line_ID (Reference Number)
  FILE_SAMP_RATE,            17,  INT2, 1,1,0,Sample Interval
  FILE_SAMP_NUM,             21,  INT2, 1,1,0,Number of data samples per trace or the maximum number of Samples
  TRACE_SAMP_FORMAT,         25,  INT2, 1,1,0,Data sample format code 1=IBM floating point 6=IEEE Canadian
  LENGTH_SYS,                55,  INT2, 1,1,0,1=metres 2=feet
  DOMAIN,                    69,  INT2, 1,1,0,Domain code: 0=time 1=amplitude 3=phase 4=depth
  SURVEY_DATUM,              71, ASCII, 6,1,0,Survey Datum eg NAD27 WGS84
  SURVEY_SURVEY_GRID,        77, ASCII, 6,1,0,Survey Grid eg ATS2.6
  TIME2FIRST_SAMPLE,         97,  INT4, 1,1,0,Time to first sample in ms
  SEIS_DATUM,               125, IEEE4, 1,1,0,elevation
  SEIS_REPLACEMENT_VELOCITY,129, IEEE4, 1,1,0,Seismic replacement velocity
  MERIDIAN,                 157,  INT4, 1,1,0,Central Meridian
  EPSG_CODE,                161,  INT4, 1,1,0,EPSG codes see http://www.epsg.org/
  LINE_NAME,                301, ASCII,32,1,0,Internal Line Name
  GEOMETRY,                 393,  INT4, 1,1,0,2=2D line 3=3D
 ENDSECTION

 SECTION Trace-header-definition
  Name,Byte,Type,Vector,Scalar,Addend,Description
  ITRACE_LINE,   1,INT4,1,1,0,Trace sequence no within line
  SOURCE_POINT, 17,IEEE4,1,1,0,Energy source point number (shot peg)
  CDP,          21,INT4,1,1,0,Ensemble no. (CDP CMP CRP etc)
  TRTYPE,       29,INT2,1,1,0,1=data 2=dead 3=dummy 4=time break 5=uphole (etc 
  HORI_NSUM,    33,INT2,1,1,0,No of horizontally summed traces in this trace
  REC_HT,       41,IEEE4,1,1,0,Elevation at receiver group
  SOURCE_DEPTH, 49,IEEE4,1,1,0,Depth of source below surface (+ve)
  CDP_X,        81,IEEE4,1,1,0,X-coordinate of ensemble (CDP) for this trace
  CDP_Y,        85,IEEE4,1,1,0,CPD coordinate (Y)
  SOURCE_STATIC,99,INT2,1,1,0,SOURCE_STATIC Source static correction [ms]
  REC_STATIC,  101,INT2,1,1,0,REC_STATIC Receiver group static correction [ms]
  TOTAL_STATIC,103,INT2,1,1,0,TOTAL_STATIC Total static applied [ms]
  SAMP_NUM,    115,INT2,1,1,0,No of samples in this trace
  SAMP_RATE,   117,INT2,1,1,0,Sample rate in microseconds for this trace
 ENDSECTION
ENDSEGZ