I haven’t run su in a very long time… but it looks to me like your offset header values are wrong, so sureduce isn’t going to work right. Also, gx and gy which you might use to compute offset, appear to be constant (same value on all traces), so you won’t be able to calculate offset using them.
You might be able to make a “quick and dirty” offset value using tracl: subtract a constant (if a split spread, probably 318; if it is a 3D record from multiple receiver lines, etc., this won’t work) and multiply by the trace spacing in meters. This doesn’t fix your header values, but might get you the plot you need.
Gary Billings
On Oct 27, 2022, at 11:25 AM, eloraafrin5@gmail.com wrote:
Hello greetings! I am a beginner. I have a big su file with huge shot points, but I want to see a particular shot point in reduced velocity mode. I made a single file for those particular shot by using key=fldr. Now this file should have total 636 traces. I wrote a command suwind < indut su file key=tracl max=636 ....... However, in image I got values from2.84*10^5 to 2.85*10^5. Even when I want to see the image in reduced velocity mode, I need to set rv= >1000 whereas it should be rv=1 to 2. It seems like there are something wrong with units in the headers. Would anyone please help me with how can I fix these??? I am a new user; I will appreciate your help and time. Here I attached the header info. Thanks FYI 636 traces: tracl 1 636 (1-636) tracr 284929 285564 (284929-285564) fldr 2245 tracf 1 636 (1-636) cdp 2245 offset 112464 120401 (112464-120401) sx 376962 sy 5176643 gx 376962 gy 5176643 ns 2001 dt 4000 _______________________________________________ Seisunix mailing list -- seisunix@mailman.seismic-unix.org To unsubscribe send an email to seisunix-leave@mailman.seismic-unix.org