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)
  TRACE_SAMP_FORMAT, IBM4, Format 1 in the binary header over rides the value in binary header
  Endianess,       LITTLE, Big Endian data suitable for SUN type computers
 ENDSECTION

 SECTION File-header-definition
  Name,                     Byte, Type,Vector,Scalar,Addend,Description
  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
  SEIS_DATUM,                125, IEEE4,1,1,0,elevation
  SEIS_REPLACEMENT_VELOCITY, 129, IEEE4,1,1,0,Seismic replacement velocity
  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
  INLINE,        9, INT4,1,1,0,Ensemble no. (CDP CMP CRP etc)
  CROSSLINE,    13, INT4,1,1,0,Ensemble no. (CDP CMP CRP etc)
  ITRACE_FILE,  25, INT4,1,1,0,Trace sequence no within this file
  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)
 ENDSECTION
ENDSEGZ