A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.
This list has moved to https://groups.google.com/a/earthscope.org/g/sac-community.
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Active Message Threads for June 2009
Ning Liu
Hi all,
Thank you for your letter.
In your letter, you have written how to rotate the N E comp to R T. But my problem is how to rotate the R T comp to N E. I did see the help of sac command "rotate", but there is no instruction abut it? So I wrote a letter again.
Best wishes,
Ning Liu and Weitao Wang
---------- Forwarded message ----------
From: Arthur Snoke<snoke@vt.edu>
Date: 2009/6/29
Subject: Re: [SAC-HELP] how to rotate R T comp into N E ?
To: weitao wang <wangwtustc@gmail.c…
[more]
Replies
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Re: Fw:Fwd: how to rotate R T comp into N E ? - Renate Hartog - 2009-06-30 05:09:15
weitao
Hi,All
I have a question while rotating horizontal component with sac. We
can use "rotate to GCP" to rotate N E into R T comp,but how to rotate back
into N E components? Is there an easy way to do this?
thanks for your help.
Best wishes
weitao
Replies
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Re: how to rotate R T comp into N E ? - Arthur Snoke - 2009-06-29 17:23:05
rongwen guo
Hi, All,
Thanks for your help. Now it works.There is another sac in the system which caused the problem(As Arthur recommended). I really appreciate it for the help of Arthur and Charlotte.
Best wishes!
Your truly
Wen
_________________________________________________________________
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No replies
Hi, All
I have installed the sac in the ubuntu. But it seems does not work. I just input the 'sac' in the command line and it is said 'bash:sac: command not found''. But I use echo $SACAUX command, it showed /usr/local/sac/aux. what is the problem? I am a newie, and here nobody know about it. Thanks very much!
Best wishes!
Your truly
Wen
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[more]
Replies
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Re: FW: Does not work - Arthur Snoke - 2009-06-26 02:02:46
Onur Tan
Hi,
I need a simple program that convert ascii file to binary SAC file format.
Can you help me?
best regards
Onur
Dr. Onur TAN
---------------------------------------------- 40.7866N 29.4500E ---------
TÜBİTAK Marmara Araştırma Merkezi, Yer ve Deniz Bilimleri Enstitüsü
TUBITAK Marmara Research Center, Earth and Marine Sciences Institute
Gebze - Kocaeli - TURKEY
No replies
Anna Courtier
Hello,
I have some SAC files and need az, baz, dist, and gcarc in the
headers. The event and station locations are already in the headers
and LCALDA = TRUE. With LCALDA=TRUE, I think the az, baz, etc should
be automatically calculated and put into the headers, but this is only
the case for about half of the data files. Switching LCALDA to false
does not change anything, and resetting the LCALDA to true does not
fix the problem either. Does anyone have a solution for this? There…
[more]
No replies
Shahar Shani Kadmiel
Replies
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Re: how should I cite SAC in a paper? - Peter Goldstein - 2009-06-15 18:30:11
Margaret Doll
We have just installed sac 101.2 on a linux 64 bit computer running
RedHat. The SAC distribution was not a source distribution.
We are getting a "Floating point error" when we run the program. I
assume that our 64 bit libraries are causing the problem in that SAC
is a 32 bit program.
How can we fix the problem?
Replies
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Re: floating point exception - Brian Savage - 2009-06-11 23:21:01
How can I divide a spectral data file by another spectral data file?
this doesn't work:
read sac1.sac sac2.sac
fft
writesp over
readsp sac1.sac
binoperr npts ignore delta ignore
divf sac2.sac
I get the following error:
ERROR 1307: Illegal operation on spectral file sac1.sac
No replies
I am trying to compute spectral ratios of between a hefty number of
files and I try it like this:
read /path_to_files/filenames*.sac
fft
writesp over
read /path_to_other_files/otherfiles*.sac
fft
writesp over
To this point every thing works well and I can even view with plotsp
and see what I am doing.
I now want to divide filenames by other_files hence get the spectral
ratio between them.
the * stands for sequential numbers and the number of file is the same
in the nominator and …
[more]
No replies
Kelly M Liszewski
I am using SAC version 101.2 on intel Mac OS X version 10.5.6, and I am running ppk to pick p waves for several stations at a time. I type ppk p 4 to view four stations at a time, but I can only zoom properly in the first subwindow (at the top of the first four traces plotted). As I scroll through all of the stations to pick them, when I try to zoom, the zoom function zooms in on the wrong portion of the trace. Has anyone else had this problem, and does anyone have any advice?
Than…
[more]
No replies
Hi,
I am trying to run an initialization macro as sac starts up.
I have created an init.m macro file in the /sac/macro directory and I
am able to run it from within sac by executing the following two
commands:
SETMACRO sac/macro
MACRO init.m
I tried aliasing sac like this:
alias sac='sac sac/macro/init.m'
but it doesn't work and I don't think that it should but this is what
it says to do in the README file for SAC so I tried.
How do I make something run as I call up sac?
Thanks
Sh…
[more]
Replies
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Re: Initialization macro - Arthur Snoke - 2009-06-01 14:58:33
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Re: Initialization macro - Guust Nolet - 2009-06-01 21:41:59
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Re: Initialization macro - Mei Xue - 2009-06-01 23:50:19
Vijay Kumar
Hi All
I am new user to MAC, i have installed sac as in Linux. i have set the
SACAUX variable and the path. I am unable to see the graphics window with
plot command.
Thank you
Vijay Kumar
--
T. Vijay Kumar
Lecturer
School of Earth Sciences
SRTMU
Nanded
Maharashtra
