[Seisunix] VSP Processing Bandpass filtering

Francisco Neto fasn.ufpa at gmail.com
Sat Aug 8 22:04:58 CEST 2020


Hello Erdi

To check the  frequency content use the follow sequency

sufft < your-data.su | suamp mode=amp | suximage  &


It Will show you the frequency in Hz

Good luck

Francisco


Em sáb, 8 de ago de 2020 2:39 PM, Erdi Apatay <eapatay at mtu.edu> escreveu:

> Hello All
>
> I am trying to move step by step on Zero Offset VSP Processing. Now, I am
> trying to apply band pass filtering to my data using this:
>
> *sufilter < xcor_output_20_sources_B1.su  f=5,10,15,20 amps=0,1,1,0 |
> filter_data.su <http://filter_data.su>*
>
> However, I did not understand how I should define the frequencies. I tried
> to leave the first two frequencies constant and changed the next two
> frequencies little by little. Then, I tried to subtract each other, using
> this:
>
> *sudiff file1.su <http://file1.su> file2.su <http://file2.su> > diff.su
> <http://diff.su>*
>
> Is there any effective way to choose these 4 frequencies in bandpass
> filtering?
> How should I learn my frequencies?
>
> If you would like to check, I added my file here.
>
> Thanks
> Best Regards
> Erdi
>
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