SAC Help

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 May 2009

Arthur Snoke
2009-05-26 05:32:07 - 2009-05-26 16:36:41
I prepared a FAPFILE in the format listed in the transfer help file, and it is as if the amplitude were 1 and phase 0 for all frequencies. Has anyone succeeded in getting it to work? What I was trying to do was running EVALRESP externally from SAC, which produces separate AMP. and PHASE. files for each channel. I wrote a program to convert them into a FAPFILE, but ...
Replies
reza
2009-05-18 02:58:05
Hi every one As you know sac changes its scale when we use fft command in it and we should correct it with div command. (Divide into dt) I want to use transfer to and transfer from. (Convolution and deconvolution) I want to know does sac change its scale or not here. Where changing scale is necessary and I have to pay attention it? I would be please if you help me. Thank you, Reza Iranian seismological center
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Carl Tape
2009-05-17 23:35:47 - 2009-05-18 00:51:12
17-May-2009 Dear SAC Help: I am having trouble using SAC libraries for a particular Fortran code. The problem may be related to 64-bit vs 32-bit processing. Here are the details of my situation. uname -a Linux denali #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux Computer Dell Inspiron 530 Platform Ubuntu 9.0.4 sac SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)] gfortran --version GNU Fortran (Ubuntu 4.3.3-5ubuntu4) 4.3.3 gcc --version gcc (Ubuntu 4.3.3-5ubuntu4) 4.3... [more]
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Bob Myhill
2009-05-14 04:04:40 - 2009-05-14 17:13:10
Dear all, I've been trying for some time to plot bbfk data retrieved from SAC (the 09/04/2008 version) in .a format, but do not understand the structure of the data output. The SAC manual informs me that the data is output in 'square mode', but I don't know how this relates to the azimuth and wavenumber, and how consecutive data points are chosen. I've tried both a simple azimuthal and wavenumber progression (rotating around the z-axis or radiating from it) but neither of these seem to rec... [more]
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Andreas Wuestefeld
2009-05-01 04:37:17
Dear Masumi I just tried to reconstruct the error you are describing. However, I don't run into any troubles. Which version of SAC and CYGWIN are you using? I am installing SAC-101.2 and on both CYGWIN-1.5.25-15 and the new CYGWIN-1.7beta this installs fine (provided all necesary CYGWIN packages are installed): http://seis.bris.ac.uk/~glxaw/Cygwin4seismology.htm Please let me know whether that helped, and also what other packages you have installed which might cause interferences. Reg... [more]
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