I'm trying to apply sumigfd on simple.su data which is used in the John Stockwell course in geophysical image processing - in the Migration chapter on page 85. I have not had any success because the vfile was not set up well. Even when I created a new vfile the problem persisits.
surange < simple.su 80 traces: tracl 1 80 (1 - 80) cdp 1 80 (1 - 80) trid 1 ns 501 dt 4000
After this information I created a vfile using the instructions,
makevel nx=80 nz=501 > cr transp < cr n1=80 > ce