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 September 2008
Kevin.Buckley@mcs.vuw.ac.nz
2008-09-30 21:15:19
- 2008-09-30 22:43:17
Hi there,
I am sure this is a known issue but my searches turned up zilch
so, just in case ...
I came to build sac-101.2 on a NetBSD 4.99.58 platform with
gcc (GCC) 4.1.3 20080202 prerelease (NetBSD nb1 20070620), the
sac build being configured thus:
./configure --prefix=/local/scratch/kevin/sac-101.2
resulting in:
Compliation Options for sac (Seismic Analysis Code 101.2)
CFLAGS =
LDFLAGS =
LIBS = -lm -lcurses
Debug =
Optimization =
Database = off…
[more]
Replies
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Re: NetBSD falling foul of SAC's toupper/tolower macros - Kuang He - 2008-09-30 05:10:12
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Re: NetBSD falling foul of SAC's toupper/tolower macros - Kevin.Buckley@mcs.vuw.ac.nz - 2008-09-30 22:43:17
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Sheila Peacock
(re-sent)
Dear All,
SAC v. 101.1 either fails or crashes when I try to use "writegse". SAC v. 100 is OK
with writegse. Is this a known bug?
Regards,
Sheila Peacock.
SAC v. 100 (is OK)
$ sacb
SEISMIC ANALYSIS CODE [03/01/2005 (Version 100.00)]
Copyright 1995 Regents of the University of California
SAC> r 1986.213.14.03.12.3600.DW.COL..SHZ.D.SAC
SAC> writegse 198608011403COL.gse.int
Converting waveforms .
Writing station data .
Writing channel data .
Writing arrival data .
1 waveforms…
[more]
No replies
Xuzhang Shen
Hi,
I use 'beam' to stack the waveforms (1.sac, 2.sac,...9.sac) and get the output file-*beam.SAC, and want to copy the event and station information to the *beam.SAC file, how to do? Who can help me supply a example of script?
Thank you.
Xuzhang
Xuzhang Shen
Lanzhou Institute of Seismology, China Earquake Administration (CEA)
450 Donggan Xilu, Lanzhou, Gansu Province, 730000, China
Tel: +86-931-8277661
E_mail: shenxzh@gmail.com; shenxz@gssb.gov.cn;
2008-09-23
Replies
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Re: question about beam - Pablo Palacios - 2008-09-26 06:18:09
Belema Altraide
To whom it may concern
I have modelled a jacket (file attached) and have performed a dynamic analysis on the structure (extract mode shapes). I have fixed the sturcture dynamically on four corners of the jacket and the topsides 222000. At the base of the structure, there is a central joint 2001 (at EL-180) that has spring values applied on them and these values are:
vertical: 7000MN/.
Lateral: 2500MN/m
Rotational: 8E6MN/radian
Torsional: 4E6MN/radian
I analysed the structure with these applie…
[more]
No replies
Beatriz Gaite
Dear to all,
When removing the instrument response from the data I get some error
messages that I have not been able to find what are they due to.
These are:
Calper is not available. Cannot tell if response is normalized, so transfer
function will be used without scaling.
Calib is not available. Cannot tell if scale factor has been applied on
input, so transfer function will be used without scaling.
Waveform multiplied by 1.000000 after deconvolution.
Another error message in some da…
[more]
No replies
Nassir alarifi
how to setup sac on mac (step by step)
No replies
Bob Hancock
When I view the R & T files after rotation, I occasionally notice that
either the R or T file has shifted to the left, and is no longer in vertical
synchronization with the Z, N, & E files. I have had this happen several
times. When the shift occurs, it is always to the left, and only involves
one file, either the R or T file. It has never occurred on both the R & T
files. I have been unable to isolate a common denominator for this problem.
Thanks
Bob Hancock
No replies
When rotating data to GCP, I get the letter Q in place of either the radial
or transverse headings on the rotated files. This has occurred on all
files where I rotated the data with SAC 101.2. I reloaded SAC 101.1, and
there was no problem with any of the files.
Thank you,
Bob Hancock
No replies
Igor Stubailo
Hello all,
I was wondering if there is an easy way to save the plots I get in sac?
Saving an image in png/gif/jpeg would work but I couldn't find such
options in the sac's help.
Thanks,
Igor
Replies
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Re: jpeg/gif output from sac - Kuang He - 2008-09-10 00:10:22
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Re: jpeg/gif output from sac - Igor Stubailo - 2008-09-09 21:14:35
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Re: jpeg/gif output from sac - Arthur Snoke - 2008-09-10 00:49:44
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Re: jpeg/gif output from sac - Igor Stubailo - 2008-09-09 21:56:52
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Kuang He
> Ying Cal
> There is currently no easy way to check the endianness of a sac file
> directly, but
>
> What you can do is something like
> % od -j 304 -N 4 -t d4 sacfile
> 0000460 6
> 0000464
>
> % od -j 304 -N 4 -t d4 sacfile.swap
> 0000460 100663296
> 0000464
>
> It outputs the header version number, which should be 6. If it is
> not 6 (100663296 or anything else)
> then you either have a byte swapped sac file or the file is not a
> sacfile. This will only tell you…
[more]
No replies
Guust Nolet
This is in response to Brian Savage's request for
input to the next SAC release.
One thing that I hope can be improved is that SAC crashes
when one mistypes an argument to the help command. At
least in my Linux and Mac OSX versions. Should be a simple
fix I would think.
Guust Nolet
nolet@geoazur.unice.fr
Geosciences Azur
250, Rue Albert Einstein
06560 Sophia Antipolis
France
+33.4.92.94.26.32
http://geoweb.princeton.edu/people/faculty/nolet/
Replies
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Re: SAC suggestion - Fiona Darbyshire - 2008-09-03 21:58:13
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Re: SAC suggestion - Brian Savage - 2008-09-04 19:00:46
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