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 August 2007
Carmen del FresnoRodríguez-Portugal
I have been using SAC for about four years under SUN-Solaris without any
problem but I have recently had to migrate to work with a Linux-Suse and
I installed SAC v101.0. I am having some problems when I try to
concatenate blackboard variables.
For example, if I run this easy macro:
do file wild *bhz
setbb base ( BEFORE "bhz" $file )
message "base is %base%"
r %base%bhz %base%bhe %base%bhn
synch
enddo
Everything works fine until the 4th line, where I get a segmentation
fault.
Any ideas?
Tha…
[more]
No replies
Sudhir Rajaure
Hello,
I can read the files and plot too. In one inversion I have to use the syntax 'r %base%BHZ* %base%BHE* %base%BHN*' . The SAC is new version, which I recently received from llnl.gov/sac. However, I suspect the linux that I currently have in the computer. It is RH Linux Enterprise (AS) version. At home I have Fedora core and it works there.
If I could fix this problem it would greatly ease my job.
Thank you.
Sudhir
National Seismological Center
Department of Mines and Geology
Nepal
…
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No replies
Dear Sir/Madam
I couldn't use the following macro to prepare waveforms for inversion in the
search of fault plane solution.
r %base%BHZ* %base%BHE* %base%BHN*
SAC exist with message "segmentation fault"
I think this problem arouse on account of small value of RAM (128 MB). Could
you please write the real cause and how to fix it?
Regards,
Sudhir
>From: sac-help-request@iris.washington.edu
>Reply-To: sac-help@iris.washington.edu
>To: sac-help@iris.washington.edu
>Subject: sac-help Diges…
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Replies
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Re: Problem in SAC using sac macro - andreas wessel - 2007-08-16 05:52:40
Dear Sir,
I would request you to send the updated version codes of rsac1 and rsac2.
Thank yo so much for this email too!
Regards,
Sudhir
>From: sac-help-request@iris.washington.edu
>Reply-To: sac-help@iris.washington.edu
>To: sac-help@iris.washington.edu
>Subject: sac-help Digest, Vol 26, Issue 2
>Date: Fri, 3 Aug 2007 12:01:48 -0700 (PDT)
>
>Send sac-help mailing list submissions to
> sac-help@iris.washington.edu
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No replies
Brian Savage
SAC Users
A bug had been discovered when using rsac1() from the sacio library.
This bug also affects rsac2() as the function logic is essentially
the same.
Description:
If the sac file being read contains more data points than expected an
error value is not returned as it should be. A error return value
(variable nerr) of -803 should be returned but is this value is set
to 0 if no other errors are encountered. The number of data points
read in (variable nlen) will be returned a…
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No replies
John D. West
That's great, Phillip! I thought about doing it either way and wasn't
sure which was easier. I appreciate your help and the sample programs.
-- John
Philip Crotwell wrote:
> Instead of using sacio.a, you might want to just use a simple struct
> to get the header and read it yourself. By reading the just the
> header, you get npts and then can do memory allocation yourself.
> Attached are a .h file that matches the sac header and a simple C
> program to read and write it. It might…
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Replies
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Re: sacio.a data size - Arthur Snoke - 2007-08-02 20:40:32
Hi.
I'm coding in C on Linux, using the sacio.a library. How can I tell the
length of the data section of a sac file? I thought it was supposed to
be in the NPTS header, but if I try to read with an undersize array,
NPTS returns the array size, not the data size.
Example: I have a file with 25000 data points. Not knowing the size in
advance, I size the array as float fData[10000]. Using the syntax on
the web site to call rsac1( kname, yarray, &nlen, &beg, &del, &max,
&nerr, strlen…
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Replies
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Re: sacio.a data size - Brian Savage - 2007-08-02 16:17:48
