DT1TOSU - Convert ground-penetrating radar data in the Sensors & Software X.dt1 GPR format to SU format.

dt1tosu < gpr_data_in_dt1_format > stdout

Optional parameters:
ns=from header number of samples per trace
dt=.8 time sample interval (see below)
swap=1 perform byte swapping (big endian machines)
=0 don't swap bytes (little endian machines)
verbose=0 silent
=1 S & S header values from first trace
sent to outpar
=2 S & S header values from all traces
sent to outpar
outpar=/dev/tty output parameter file
list=0 silent
=1 list explaining labels used in verbose
is printed to stderr

Caution: An incorrect ns field will munge subsequent processing.

Notes:
For compatiblity with SEGY header, apparent dt is set to
.8 ms (800 microsecs). Actual dt is .8 nanosecs.
Using TRUE DISTANCES, this scales velocity
and frequency by a factor of 1 million.
Example: v_air = 9.83X10^8 ft/s (real)
v_air = 983 ft/s (apparent for su)
Example: fnyquist = 625 MHz (real)
fnyquist = 625 Hz (apparent for su)

IBM RS6000, NeXT, SUN are examples of big endian machines
PC's and DEC are examples of little endian machines

Caveat:
This program has not been tested on DEC, some modification of the
byte swapping routines may be required.


Credits:
CWP: John Stockwell, Jan 1994 Based on a code "sugpr" by
UTULSA: Chris Liner & Bill Underwood (Dec93)
modifications permit S & S dt1 header information to be transferred
directly to SU header

Trace header fields set: ns, tracl, tracr, dt, delrt, trid,
hour, minute, second