sftahmakeevent (2.0-git)
Trace And Header MAKEEVENT makes constant velocity dipping event synthetic.

        sftahmakeevent < in.rsf > out.rsf verbose=1 v= dx= dy= x0= y0= t0=

tah is the abbreviation of Trace And Header. Madagascar programs
that begin with sftah are a designed to:
1- read trace and headers from separate rsf files and write them to
standard output (ie sftahread)
2- filter programs that read and write standard input/output and
process the tah data (eg sftahnmo, sftahstack)
3- read tah data from standard input and write separate rsf files for
the trace and headers data (ie sftahwrite)

These programs allow Seismic Unix (su) like processing in Madagascar.
Some programs have su like names.

Some programs in this suite are sftahread, sftahgethw, ftahhdrmath,
and sftahwrite.

The sftahmakeevent program makes simple synthetic on input data source
and group xy coordinates (i.e. sx, sy, gx, gy). The event has constant
velocity and dip. The nmo velocity will depend on source/receiver azimuth.

sftahsort \
input=npr3_gathers \
sort="iline:169,181 xline:104,116 offset:0,11000" \
verbose=1 \
| sftahmakeevent \
| sftahmakeskey pkey=iline,xline skey=cdpt verbose=1 \
| sftahnmo \
verbose=1 \
tnmo=0.000,4.000 \
vnmo=11000,11000 \
| sftahwrite \
verbose=1 \
label2="cdpt" o2=1 n2=34 d2=1 \
label3="xline" o3=104 n3=13 d3=1 \
label4="iline" o4=169 n4=13 d4=1 \
output=gather_subset.rsf \

The headers are in the file npr3_gathers_hdr.rsf,
the headers parameter default. The headers are merged with the trace
amplitudes and the tah data sent down the pipe for sftahmakeevent. The
Traces are sent to STDOUT to have nmo applied and data to be written to
disk. Data is also sent to /dev/null (the bit bucket).

none yest, but eventually ude this template:
strings key= no default

list of header keys print. Look at the sfsegyread for a list
of header names.

float dx=

float dy=

float t0=
float v=

int verbose=1

flag to control amount of print
0 terse, 1 informative, 2 chatty, 3 debug

float x0=

float y0=