Hi,
do you mean convert a t(z) function to a Vrms(t) function ?
This is the job of the velconv tool. Need to interpolate your FB picks
using unisam before.
D.
Le 25/08/2020 à 14:35, Ty Collins a écrit :
Anyone use SU to pick the first breaks and to review
Stacking
Velocity? Can it be done in SU? I usually get data sorted then migrate
into a 3rd party software to determine stacking velocity. Anyone doing
this is SU?
------------------------------------------------------------------------
*From:* Seisunix <seisunix-bounces(a)mailman.seismic-unix.org> on behalf
of Dominique ROUSSET <dominique.rousset(a)univ-pau.fr>
*Sent:* Tuesday, August 25, 2020 2:50 AM
*To:* seisunix(a)mailman.seismic-unix.org
<seisunix(a)mailman.seismic-unix.org>
*Subject:* Re: [Seisunix] Zero Offset VSP help
Hi,
just a few suggestions :
- check the output data for each step to find where it fails.
- print the FK amplitude spectrum to check your filter parameters (why
do you use 3 parameters for the filter ? slopes=-something,+something
amps=0,1 should be ok to keep positive slopes. Before and after FK
filtering.
- use suxwigb key=gelev (or the parameter describing geophone depth)
to produce well labeled plots of the seismic data in T-Z domain
instead of suximage
- I prefer to pick the first breaks before FK (or zero phase F) filtering
Hope it helps
D.
Le 25/08/2020 à 01:35, Erdi Apatay a écrit :
Hello All
I have a script I am using for Zero Offset VSP processing. First of
all, my first three traces looked cut so I rejected them. After
getting rejected file, I filtered out the downgoing wavefield by
sudipfilt. Then, I picked arrivals on the zero amplitude line
corresponding to picking amplitudes. Then, I converted those arrival
times (seconds) to milliseconds and saving them in a txt.file. After
that, txt file is converted from ascii to binary format. Finally, I
am adding those time values to the traces by sustatic command.
At this point, however, when I try to plot the flattened upgoings,
the script plots just a so narrow part as follows:
fkfiltflat.PNG
Can you help me with this issue? I tried to change a lot of things
but I could not get whole flattened upgoings.
If you would like to check my script, I added here.
Thank you
Erdi
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|Dominique Rousset LFCR UMR5150 / E2S UPPA / Dpt des géosciences|
|Univ. Pau et des Pays de l'Adour BP 1155 F-64013 Pau Cedex - France|
|mailto:dominique.rousset@univ-pau.fr jami:drousset
http://lfc.univ-pau.fr|
|Off: +33 559 407 423|Cell: +33 660 861 391|xmpp: dominique(a)rousset.nom.fr|
<mailto:dominique@rousset.nom.fr|>
--
|Dominique Rousset LFCR UMR5150 / E2S UPPA / Dpt des géosciences|
|Univ. Pau et des Pays de l'Adour BP 1155 F-64013 Pau Cedex - France|
|mailto:dominique.rousset@univ-pau.fr jami:drousset
|Off: +33 559 407 423|Cell: +33 660 861 391|xmpp: dominique(a)rousset.nom.fr|