SUPGC - Programmed Gain Control--apply agc like function but the same function to all traces preserving relative amplitudes spatially.

Required parameter:
file= name of input file

Optional parameters:
ntrscan=200 number of traces to scan for gain function
lwindow=1.0 length of time window in seconds



Author: John Anderson (visitor to CWP from Mobil)

Trace header fields accessed: ns, dt