SAC Help

A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.

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Active Message Threads for October 2017

Mukesh Das
2017-10-28 16:38:18 - 2017-10-31 18:16:06
Hi sac users, I have computed Ps receiver function in which maximum amplitude (direct P-wave arrival) comes after 2-3 sec not at 0 sec. I want to shift maximum amplitude at 0 sec. Can anyone suggest how to shift this maximum amplitude at 0 sec. Here below i have attached some screen shot of receiver function in which maximum amplitude (direct P- wave arrival) come at after 2-3 sec. Thanks -- Mukesh Kumar Das JRF (Research Scholar) Department of Applied Geophysics Indian lnstitute of Technol… [more]
Guilherme de Melo
2017-10-23 05:20:51 - 2017-10-23 17:45:48
Hello! Does anyone know the bibliographic reference of the cross correlation method used by the SAC in the correlate command? Regards, Guilherme de Melo -- Guilherme Weber Sampaio de Melo Master's seismology research - UFRN/BR
Mukesh Das
2017-10-23 16:48:16
Hi, Can anyone please help me to solve the problem in SAC, like the problem is, in some of the receiver function the direct P-arrival is coming in 2-3 sec instead of 0 sec. I have tried it to fix but some headers value is missing. Thank you. -- Mukesh Kumar Das JRF (Research Scholar) Department of Applied Geophysics Indian lnstitute of Technology (Indian School of Mines) Dhanbad, Jharkhand-826004, India Mob +918873563108 +918340601230
No replies
andreas wessel
2007-02-23 04:50:28 - 2017-10-23 15:32:08
Hi list, I'm wondering if there is an easy way to start SAC silently, e.g. not getting those lines: SEISMIC ANALYSIS CODE [06/06/2005 (Version 100.1)] Copyright 1995 Regents of the University of California Would be net if there was a flag or command or something for this. (I'm using Sac 100.1 on a linux machine) Thanks, Andreas
2017-10-16 08:31:38 - 2017-10-17 02:53:26
Hello I basically want to add the correct SAC header from .txt file to the corresponding .SAC file I have .SAC file which are named as followed; N.TROH.U.D.1.SAC N.TROH.U.D.2.SAC N.TROH.U.B.3.SAC N.TROH.U.C.4.SAC and so on.... I also have a .txt called TROH_T1_T2.txt which is set-out as followed. N.TROH.U.D.1.SAC 5.5424 6.4533 N.TROH.U.D.2.SAC 3.2432 5.5433 N.TROH.U.B.3.SAC 7.5345 9.5345 N.TROH.U.C.4.SAC 5.3424 3.4234 and so on ..... what i w… [more]
Sachin Tiwari
2017-10-11 16:31:36
Hi Sac Users, Can you please help me in listing all my SAC files in increasing order of their back-azimuth values and assigning integer weights starting from “1” to each file in their “user8” header? If there are 8 sac files then file with minimum back-azimuth will have "1" weight in user8, while maximum back-azimuth file will have "8" weight in its sac header. Thanks -- *Sachin Kumar * *Junior Research Fellow (JRF)* *Dept. of Applied Geophysics* *Indian Institute of Technology (Indian S… [more]
Alejandro Gaytan
2017-10-06 16:11:14 - 2017-10-07 15:29:41
Hello I ‘ll apreciarte you support: How convert acceleration files with extension .SAC to velocity by using SAC software ? Thanks so much. Alejandro
Sunil .
2017-10-05 09:52:39 - 2017-10-07 13:38:00
Dear All, In signal stacking sub-process (SSS), by default the record section is plotted with distance. I want to plot the record section with another variable like azimuth. Is there any provision to do it in SSS. I will appreciate any help and suggestion. Thanking you, Regards, Sunil Roy ERI, University of Tokyo
2017-10-06 14:26:15
Dear SAC users and experts, I used SAC and GMT for years on Unix Solaris for years. But, now I don't have the same OS (Unix Solaris). So, I want to create a new environment for my bash and shell programs code that I have already established before. Which is easier and problem free of bugs. Creating a Linux environment (Ubuntu) or working under windows with Cygwin. Does my bash and shell programs code that I have created before will work will on windows Cygwin or Ubuntu Linux environment?… [more]
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