This direcory structure contains Standard SEGY shot gathers (.sgy)
from the Central European Lithospheric Project Based on Refraction
refered to as Celebration2000.  This was a continuation of a refraction
project in 1997 in Poland (Polonaise).

The shot gathers are broken down into north-south (_n), east-west (_e)
and vertical (_z) components.

The geometry should be loaded into the headers.

Rectangular coordinates were used with mapproject command.

mapproject $tsp/geom/rec.dd-Jml:0.9996 -R13/51/26/55r-F-: | awk -f
$tsp/csh/refmtxy.awk>! $tsp/geom/rec.xy

This means it is in Mercator, with the beginning of the coordinate frame on
lat 51N, lon 13 E.

Geographical coordinates (in seconds of arc) are located in non-standard part
of the SEG-Y trace header.
bytes 221-224 receiver geo.lat
bytes 225-228 receiver geo.lon
bytes 229-232 source geo.lat
bytes 233-236 source geo.lon