I would use sushift to delay the traces and then subtract the delay from the subsequent picks generated by sufbpickw

Regards

Rob

From: Seisunix <seisunix-bounces@mailman.seismic-unix.org> On Behalf Of Erdi Apatay
Sent: Wednesday, 5 August, 2020 11:30 PM
To: seisunix@mailman.seismic-unix.org
Subject: [Seisunix] VSP Processing

Hello All

I am trying to pick first break arrivals in Zero Offset VSP on the Crewes toolbox and another software. My problem is that I start picking from 4th trace because I cannot see the first three traces when I look at my data, which results in wrong velocities.

My data is passive zero-offset VSP data, utilizing ambient noise sources. I created this by using a modeling code.

I added one of my data and the problem's screenshot

Can I fix this on Seismic Unix?