Hello - First, I am sorry but I don't know anything about "sureduce."

Second, below is some of the documentation from the program sushw (set header word). I think example 3 might be best for you:    the value of "a" is the first (nearest) offset     the value of "b" is the distance between traces (constant spacing)     the value of "j" is the number of traces in the gather Third, you can get documentation for any program by entering the name of the program; for example, sushwFourth, you can get a little more documentation for any program by entering "sudoc" plus the name of the program; for example, sudoc sushw

David ---------------------------------------------------

The value of each header word key is computed using the formula:      i = itr + d                                  val(key) = a + b * (i % j) + c * (i / j)              where itr is the trace number (first trace has itr=0, NOT 1)

Examples:                                  1. set every dt field to 4ms                              sushw <indata key=dt a=4000 |...                  2. set the sx field of the first 32 traces to 6400, the second 32 traces     to 6300, decrementing by -100 for each 32 trace groups            ...| sushw key=sx a=6400 c=-100 j=32 |...                  3. set the offset fields of each group of 32 traces to 200,400,...,6400    ...| sushw key=offset a=200 b=200 j=32 |...                  4. perform operations 1., 2., and 3. in one call               ..| sushw key=dt,sx,offset a=4000,6400,200 b=0,0,200 c=0,-100,0 j=0,32,32 |

In this example, we set every dt field to 4ms.  Then we set the first      32 shotpoint fields to 6400, the second 32 shotpoint fields to 6300 and  so forth.  Next we set each group of 32 offset fields to 200, 400, ...,  6400. ---------------------------------------------------

On Wednesday, October 26, 2022 at 01:17:07 PM MDT, eloraafrin5@gmail.com wrote:

Hello, I am a beginner. I need to apply sureduce command to a particular shot which is in su file format. I tried with different rv values but could not see any differences in the image. I checked with the headers of that file and found I have ns and dt headers but not offset. Can anyone please help me how can I add offset header to my su file?  And please let me know if there are any other things to fix to get result. Thanks _______________________________________________ Seisunix mailing list -- seisunix@mailman.seismic-unix.org To unsubscribe send an email to seisunix-leave@mailman.seismic-unix.org