A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.
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Help
Help lists are for submitting support questions. Anyone can post a question for IRIS (or another team) to answer.
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- SAC Software SAC
Active Message Threads for June 2010
Megan Torpey
Hi,
I'm having a SAC problem. I'm running a program to digitize paper seismograms. My digitization program saves the files I create as .SAC files. I got one digitized and saved it as .SAC but when I tried to read the file into SAC I got the following error:
ERROR 1318: Header in disk file is out of date: myfile
Header version number is incorrect.
Header seems byte-swapped—byte-swap file and retry.
I looked up sac help online and I got : http://www.iris.washington.edu/pipermail/sac…
[more]
Mohit Agrawal
Hello
I am downloading the data for the GSN stations with the help of SOD but
after looking at the seismogram , I noticed that I am getting variable
length of seismogram. Can you please tell me "how can I solve this problem".
Thanks
Mohit
No replies
Arthur Snoke
Version 101.4 of SAC is now available for download from URL
<http://www.iris.edu/software/sac/>.
For a summary of the changes between this version and 101.3b (released
August 2009), one can view the HISTORY file at
<http://www.iris.edu/software/sac/HISTORY.txt>. That file, as well as the
more detailed CHANGES file, can also be accessed from the IRIS
software/sac page.
As before, there are binary distributions for Sun Solaris, Linux (32 bit
and 64 bit) and Mac OS X. There are now two b…
[more]
No replies
I am trying to compile a short c code using some subroutines from sacio.a
I get this error:
sacio.a: could not read symbols: Archive has no index; run ranlib to add one
collect2: ld returned 1 exit status
When I run ranlib, I get this:
ranlib: sacio.a: Malformed archive
I have a feeling this has to do with the fact I am using the sacio.a archive which is distributed with MacSAC and is not compatible with the linux machine I am compiling on.
What to do?
Replies
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Re: sacio.a for linux - Brian Savage - 2010-06-09 16:24:12
Shahar Shani Kadmiel
2010-06-09 00:12:38
- 2010-06-09 17:36:11
I have written a short code in c utilizing the "wsac1" subroutine.
When compiling, I get this:
Undefined symbols:
"_wsac1", referenced from:
_main in cc7iJC76.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
This is the only problem and when I comment out the line containing wsac1 the program compiles with no errors.
The part after _main, where it says "cc7iJC76.o", changes with every try.
This is my compile line:
cc codeName.c -o codeName -lm -m32 sacio.a
where sacio…
[more]
Replies
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Re: Compiling a c code with subroutines from sacio.a - Brian Savage - 2010-06-09 17:36:11
Paola Morasca
2010-06-06 14:42:55
Hi Brian,
I am not sure you got my reply including the information you asked, so I forward it in this email.
Also, I tried to substitute the sac bin version with the sac source version, but after the installation I still get the same error:
bash-3.2$ make Masterprogram
gfortran -m32 Masterprogram.o /usr/local/sac/lib/libsac.a /usr/local/sac/lib/sacio.a -o Masterprogram
Undefined symbols:
"_cmmem", referenced from:
_cmmem$non_lazy_ptr in sacio.a(writevfile.o)
_cmmem$non_lazy_pt…
[more]
No replies
gaurav dutta
Dear Sir,
How to convert data which is in sac format into ascii format ?
Replies
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Re: How to convert data in .sac format to ascii format ? - Rick Benson - 2010-06-05 13:46:19
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Re: How to convert data in .sac format to ascii format ? - Bob Myhill - 2010-06-05 19:12:12
Katie Boyle
Hi All,
Every time I run SAC, it barfs this out (all I did for this example was type
'sac' and then immediately typed 'quit'):
me@me-desktop:~$ sac
SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)]
Copyright 1995 Regents of the University of California
SAC> quit
*** glibc detected *** sac: free(): invalid next size (fast): 0x09ba1178 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7d06454]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb7d084b6]
sac[0x81e5fc6]
sac[0x81d82eb]
…
[more]
Replies
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Re: SAC Memory Dump - Brian Savage - 2010-06-04 20:55:29
Andreas Wuestefeld
2010-06-01 22:27:37
- 2010-06-03 12:59:23
Dear Isaac, Aldo
I have lately had to install CYGWIN & SAC on several WIN7 computers, and
I cannot reproduce the error. I assume you have a Win7 system with admin
previliges, and use the latest release of CYGWIN (ver1.7.x)?
Win7 has a rather strict permission policy, which sometimes results in
files opened/upacked under windows are not accesible in cygwin. a
"chmod" ususally helps
I suggest that you unpack and untar the sac-101.3b-cygwin.tar.gz under
cygwin and not Windows
check manual…
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Replies
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Re: I can't install SAC-101.3b on cygwin in windows 7 - Arthur Snoke - 2010-06-01 18:33:45
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Re: I can't install SAC-101.3b on cygwin in windows 7 - Isaac Mulamba - 2010-06-03 12:59:23
Water
Dear All:
When I try to picking phase arrival in plotpk window,
I type ohpf to create a hypo file before phase picking.
I can get correct P-phase arrival time after I typing "P" to decide the P-phase,
however, I cannot get S-phase arrival time when I type "S" to decide the S-phase,
the arrival time of S-phase reveals 0.0 both in the PPK window and in the hypo file.
how can I resolve this problem?
Thanks all for your help.
No replies
Jesse F Lawrence
Hi,
I am writing a set of subroutines to read in sac header information into the
format I need for my program. On a unix machine I have no problems, but on
linux I get the following error message:
ERROR 1336: Undefined header field value. kuser0
I have filled this variable on my sac files. I can proceed despite the
error, but it is not satisfying to have a bunch of error messages come up.
Any suggestions?
Any fixes?
Any way to suppress the error message?
Cheers,
-Jesse
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