This first example is for a conventional reverse profile line shot along the
road shoulder. It is used to determine the refractor velocity, overburden
velocity, and delay times at locations needed later for the line which runs up
the steep slope. Assuming you have downloaded the ID-102
archive and
unpacked it in a convenient location, you will note that it has the following
directory structure:
{treelist} ID-102 |--- bison | |--- basemaps |--- seg | |---shoulderLine |--- | |--- directWave |--- | `--- headWave |--- `---slopeLine `--- sgytreelist
Change to the sgy
directory. These are in the data exchange format defined by the
Society of Exploration Geophyicists, SEGY (Barry et al. (2)). The data format
includes a reel header which goes back to the days of digital tape. It has been adapted for
disk use here. The BSEGY used by BSU differs in that it does not retain the reel header, and
there are some special uses for the optional headers (see section 6.1 for more).
Convert these files to BSEGY with a command sequence as follows:
bcnv k004.sgy 0 1 1
mv bcnvk004.seg k004.seg
The move “mv” command renames bcnvk004.seg
with k004.seg
. Repeat this for
files k008.sgy
and k009.sgy
. Then move the BSEGY data files to
the “shoulderLine” directory,
mv k0*.seg ../seg/shoulderLine
The files are as follows: