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 August 2012
Dolores Gonzalez
Hi,
I'm trying to install sac in my computer running 64-bit Linux
distribution fedora. I set the path like in the README file. After do that
i get an error: bash: /home/user/sac/bin/sac: cannot execute binary file.
Can you help me please.
Tanks.
M.C. Ma. Dolores González Mellado
CFE-GEIC
Dpto. de Sismotectonica
Av. San Rafael Sta. Cecilia 211-B
Col. San Rafael. Tlalnepantla de Baz
Edo. de Mex. C.P.54120
Tel. 52294400 ext. 64227
Replies
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Re: trouble installing sca - Arthur Snoke - 2012-08-28 23:45:26
Justin Wood
Hello all,
I am having trouble reading css files into SAC (version grh-109). I believe
incorrect syntax is causing the error [1301], but I'm not sure of the
correct syntax (even when looking at the help file). I've typed in the
following commands:
readcss *.wfdisc
readcss H31*.wfdisc
and variants thereof, but I still receive error 1301.
SAC also provides an additional message that reads:
- relevant header fields left vacant
- The current flist does not contain any fnames listed i…
[more]
Replies
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Re: Error with readcss - George Helffrich - 2012-08-22 04:35:14
Amr El-Sharkawy
Dear My Professors
can you help me in this problem
I changed
Export SACAUX=${SACHOME}/ aux
To
Export SACAUX= /usr/local/geophysics/sac/aux
My screen become black
And i can not now enter my user even if i write my password
Just black screen
Soo plz how can i enter my linux???
And do my repairs!!
If this will require anew Linux system??
With All Respect and appreciation
amr
Amr El-Sharkawy
Seismologist, National Research Institute of
Astronomy and Geophysics, (NRIAG), Egypt.
e-mail: amr_e…
[more]
No replies
Jorge Real
hello!!!!
I'm using the comand sgftops for change the sgf file to ps file, and I
receive this error:
SAC> sgftops f001.sgf pru.ps
sh: sgftops: Permission denied
my sac version is: [08/24/2009 (Version 101.3b)]
thanks
jorge real
--
Jorge Arturo Real Pérez
Cel (044) 5514763979
student of seimology
UNAM
Replies
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Re: problem with sgftops - Arthur Snoke - 2012-08-21 03:05:44
Dears My Professors
How it is going.
Can you help me, my problem with sac is the following
But when i wrote echo $SACAUX
It gives me nothing
Empty line
And this is in my bashrc file
Export SACHOME= /usr/local/ bin/sac
Export SACAUX= ${SACHOMe}/aux
Export PATH= "/usr/local/bin/usr/local/bin/sac/sac/bin:$PATH
And really i need to know what is the point!!!
with all respect and appreciation
amr
Amr El-Sharkawy
Seismologist, National Research Institute of
Astronomy and Geophysics, (NRIAG)…
[more]
Replies
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Re: Problem with SAC - Milton Plasencia - 2012-08-15 14:42:56
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Re: Problem with SAC - Arthur Snoke - 2012-08-15 15:01:56
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Re: Problem with SAC - Milton Plasencia - 2012-08-15 21:30:10
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segy2sac/SU2SAC - Juan Lorenzo - 2012-08-15 16:35:07
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segy2sac/SU2SAC - Juan Lorenzo - 2012-08-15 20:40:16
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Mohit Agrawal
Hello Everyone,
Is there any command in SAC which can remove a particular header from a sac
file ?
Thanks,
Regards
--
*Mohit Agrawal
PhD Candidate | Research Assistant | Geophysics (Computational Seismology)
Dept. of Geology | Baylor University
Geophysics Lab, E453R | Baylor University Sciences Building (BSB) | Office:
E454R,BSB.
Phone- 254-710-2172 ( lab), 254-710-2155(office), 281-460-8941(Personal)
Email : mohit_agrawal@baylor.edu, ism21.mohit@gmail.com
Home Address : Apt # 207, 1500 s,…
[more]
Replies
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Re: SAC Command - Arthur Snoke - 2012-08-09 20:10:11
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Re: SAC Command - Juan Lorenzo - 2012-08-11 00:27:36
marco.olivieri@bo.ingv.it
Dear SAC users,
I could notice unexpected differences in spectrogram output when
changing ymin and ymax ranges, and I did this synthetic test:
SAC> fg random 1 2 npts 1200 delta 0.5 ; w noise.sac
SAC> fg sine 1 0 npts 1200 delta 0.5 ; mul .5 ; w sine.sac
SAC> r sine.sac ; addf noise.sac ; w sac_noise.sac
SAC> r sac_noise.sac ; rtr ; spectrogram w 30 s 5 ymin .05 ymax 1.5
<-- case 1
SAC> r sac_noise.sac ; rtr ; spectrogram w 30 s 5 ymin .5 ymax 1.5
<-- case 2, (zoom around 1Hz)
in c…
[more]
Replies
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Re: spectrogram: strange behavior - Brian Savage - 2012-08-10 20:32:43
Juan Payero
Hello Mohit,
You can use the command: ch stla '-012345' for change the station
latitude to nothing or another header from a sac file. Some header
is'nt impossible change, because it have special characteristic from
the file.
In sac program you can say: help ch for another example.
Juan.
> Hello Everyone,
>
> Is there any command in SAC which can remove a particular header from a
> sac
> file ?
>
> Thanks,
>
> Regards
>
> --
> *Mohit Agrawal
> PhD Candidate | Research Assistant …
[more]
No replies
Hello Everyone,
I know this is the place to discuss only about SAC but I need some help to
save my earth model into MatTaup (MATLAB version of taup )to calculate the
phase arrival times. My model consists the values for Vp, Qkappa, Vs, Qmu,
density and depth which not a standard model but a combination of AK135 and
PREM models.
How can I use MatTaup to calculate the arrival times of different phases
according to my model ?
Should I use spherical earth model OR flat earth model to calculate p…
[more]
Replies
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Re: Help needed - MatTaup - Januka Attanayake - 2012-08-07 15:59:25
Yi Tao
Dear all,
I am new to SAC. Does anyone know how to create a segy file or Seismic Unix
format (SU) file (or binary file without header) using SAC?
How can we choose it to be IBM or IEEE format?
Best regards,
Yi Tao
No replies
Yun Wang
I know there is command "window" that can be used to adjust the window size.
But how can I set the default window size ?
Thanks.
Yun
Replies
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Re: HELP: How to set plotting window size by default - Arthur Snoke - 2012-08-03 04:05:59
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Re: HELP: How to set plotting window size by default - Yun Wang - 2012-08-03 00:37:05
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Re: HELP: How to set plotting window size by default - Milton Plasencia - 2012-08-03 15:08:22
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Dr. Stewart A. Levin
Yesterday I converted a petroleum industry passive recording in SEG-D format to the SAC format. This week-length seismogram was recorded at a 2 millisecond sample rate and contains about 300 million samples. We can expect to see significant growth is such industry activity and an opportunity to enhance IRIS research with such densely sampled (both temporal and areal sampling) data. However, the binary SAC header isn't fully up to handling these data in (at least) the following two ways:
1)…
[more]
