SUADDHEAD - put headers on bare traces and set the tracl and ns fields

suaddhead <stdin >stdout ns= ftn=0

Required parameter:
ns=the number of samples per trace

Optional parameter:
ftn=0 Fortran flag
0 = data written unformatted from C
1 = data written unformatted from Fortran

Trace header fields set: ns, tracl
Use sushw/suchw to set other needed fields.

Caution: An incorrect ns field will munge subsequent processing.
Note: n1 and nt are acceptable aliases for ns.

Example:
suaddhead ns=1024 <bare_traces | sushw key=dt a=4000 >segy_traces

This command line adds headers with ns=1024 samples. The second part
of the pipe sets the trace header field dt to 4 ms.


Credits:
SEP: Einar Kjartansson
CWP: Jack K. Cohen

Trace header fields set: ns, tracl