[Seisunix] Help with fixing Trace number

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