SUSTATIC - Elevation static corrections, apply corrections from headers or from a source and receiver statics file

sustatic <stdin >stdout [optional parameters]

Required parameters:
none
Optional Parameters:
v0=v1 or user-defined or from header, weathering velocity
v1=user-defined or from header, subweathering velocity
hdrs=0 =1 to read statics from headers
=2 to read statics from files
sign=1 =-1 to subtract statics from traces(up shift)
Options when hdrs=2:
sou_file= input file for source statics (ms)
rec_file= input file for receiver statics (ms)
ns=240 number of souces
nr=335 number of receivers
no=96 number of offsets

Notes:
For hdrs=1, statics calculation is not performed, statics correction
is applied to the data by reading statics (in ms) from the header.

For hdrs=0, field statics are calculated, and
input field sut is assumed measured in ms.
output field sstat = 10^scalel*(sdel - selev + sdepth)/swevel
output field gstat = sstat - sut/1000.
output field tstat = sstat + gstat + 10^scalel*(selev - gelev)/wevel

For hdrs=2, statics are surface consistently obtained from the
statics files. The geometry should be regular.
The source- and receiver-statics files should be unformated C binary
floats and contain the statics (in ms) as a function of surface location.


Credits:
CWP: Jamie Burns

CWP: Modified by Mohammed Alfaraj, 11/10/1992, for reading
statics from headers and including sign (+-) option

CWP: Modified by Timo Tjan, 29 June 1995, to include input of
source and receiver statics from files.

Trace header fields accessed: ns, dt, delrt, gelev, selev,
sdepth, gdel, sdel, swevel, sut, scalel
Trace header fields modified: sstat, gstat, tstat