[Seisunix] Seismic data with micro-seconds sampling interval

Dear Sirs,

I have a seismic data sampled at micro-seconds.

I load 3 files with :

segyread tape=mySegy.sgy > mySegy.su

Then I used:

surange < mySegy.su

As you can see in the attached log files, the one called box31.log contains "strange" d1 and f1 values.

Please could you help me to understand why d1 and f1 are so big ?

The only one significant difference is that an01 and an31 are sampled at 33 micro-seconds while box31 is at 124 micro-seconds.

Thanks

Giulia