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The definition of BSEGY format data is contained in the
include files packaged with the source code. See directory
bsu-3.0.2/src/Fort/include/
for the fortran programs, bsu-3.0.2/src/C/include/ for the C-language
programs. The format
is derived from the SEGY data exchange format published by the Society of
Exploration Geophysicists (SEG)
(2).
As is the case in Seismic Unix (SU), the tape reel header is dropped. Each
signal begins
with a 240 byte trace header, followed by floating point data. The trace
header
specifies locations
of the source and receiver, number of samples in the signal, sample interval,
etc. The BSEGY format
differs from the SU format in a key area. The SU format is well designed for
reflection
data, typically vertical component receivers. The BSEGY format is designed
with
header elements which record
the source and receiver polarizations, permitting a full description of the
inclination and azimuth of
the geophone element as well as an equivalent force description of the source
effort.