Hi Elora -

Riding on the back of Glenn's message, please know that, in addition to selecting time (tmin, tmax), suwind can select traces, too:

key=tracl Key header word to window on (see segy.h)

min=LONG_MIN min value of key header word to pass

max=LONG_MAX max value of key header word to pass

Use surange to get the overall picture of your trace keys and use sugethw or sudumptrace to get details of specific keys.

Also, Excel or LibreOffice Calc could be used for quick plots after extracting columns from your .su files.

You might post the output from surange so we might give more informed advice.

David

. . . . . . . . . . . . . .

On Tuesday, April 11, 2023 at 12:50:29 PM MDT, Glenn Reynolds <gdreynolds@gmail.com> wrote:

Use surange to get the range of headers.

Then use key and min keywords to limit the traces.

Also check your filter settings. Should amps be 0,1,1,0 instead perhaps?

gdr

On Tue, 11 Apr 2023, 21:02 Elora Afrin, <elora.afrin@students.tamuk.edu> wrote:

Hi,

Greetings! I am working on marine multichannel seismic data. To see structural features, I need to plot twt vs distance plot for last 56 km of the line. It is a very long line and I want to observe only the feaures of last 56 km. However, I am struggling a lot to set x axis values. I typed

suwind < 5thshot.su tmin=0 tmax=4 j=600 | sugain jon=5 | sufilter f=0,5,10,20 amps=0.,0.,1.,1., | supsimage perc=99 > 5th.ps

It has given me the image of th whole line. Whereasm I am expecting an image like the image I have attached. Please help me out with making such an image. Thanks.

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