SAC Help

A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.

Email address
sac-help@lists.ds.iris.edu
Type
Moderated by
IRIS Webmaster
Related tags
SAC Software SAC
November
October
September
August
July
June
May
April
March
February
January

Active Message Threads for August 2007

Carmen del FresnoRodríguez-Portugal
2007-08-20 16:29:33
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
2007-08-16 07:12:03
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 … [more]
No replies
Sudhir Rajaure
2007-08-15 09:07:09 - 2007-08-16 05:52:40
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… [more]
Replies
Sudhir Rajaure
2007-08-15 09:01:05
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 > >To subscribe or unsubscribe via the World Wide Web, visit > http://www.i… [more]
No replies
Brian Savage
2007-08-03 17:40:37
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… [more]
No replies
John D. West
2007-08-02 16:26:55 - 2007-08-02 20:40:32
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… [more]
Replies
John D. West
2007-08-02 04:53:00 - 2007-08-02 16:17:48
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… [more]
Replies
22:31:37 v.e73c6799