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 April 2017

Prateek Mondal
2017-04-24 12:58:10
I have two shell script. One for pick up information and other one is for update those information to sac header. I am facing problem when passes the arguments to the shell script for updating sac header. Please help. Thanks in advance Below one is which finds the information from a list of events #!/bin/bash while IFS=' ' read -r ev[$i] || [[ -n "${ev[$i]}" ]]; do # Reads event list echo ${ev[$i]} | cut -c1-12 # shows events in … [more]
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Hello, I have a simple script that does the number rounding: SAC> sc rround.bsh &1,depmen& 0.52 Unfortunately in my ver 101.6a the "sc to" feature to get the shell output into a bb variable is not implemented: SAC> sc rround.bsh &1,depmen& 0.52 SAC> SAC> sc to var rround.bsh &1,depmen& sh: to: command not found I would like to use the rounding result (0.52) inside the SAC. How do I capture the sc output into a bb variable in my case? If I have a different number saved in a local file, ho… [more]
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2017-04-20 00:19:10 - 2017-04-20 23:22:48
> Hello, > By a default, a SAC plot displays the station name and channel (along with the date and time). > Is there a way to also display the 2-letter station network name on a plot? > Thanks, > Igor
Maria Luíza Cardoso
2017-04-19 22:13:28 - 2017-04-20 20:27:17
Hello, Does anyone know how can I get both real and imaginary part of a sac file? And its complex conjugate? Best regards, Maria.
Athanasopoulos George
2017-04-20 04:53:01 - 2017-04-20 17:43:19
Dear Sir, Thank you for approving our request for SAC program. We have already dowloaded and unzipped the program in our PC (core i7-2600 CPU @ 3.40GHz, RAM 16GB, 64-bit). Our PC's operational system is Windows 7. We have read the instructions accompanying the software; we are encountering, however, difficulties, in installing and running the program in the Windows 7 environment. Could you please help us in this regard? Regards, G.A. Athanasopoulos ------------------------------- … [more]
2017-04-18 17:46:59 - 2017-04-19 13:54:18
Hi, I have downloaded the waveform and Response poles and zeros in SAC format from JWEED. I removed the instrument response using command " transfer from polezero subtype ./resp.pz to vel freqlimits 0.001 0.002 10 20" in SAC. Initially in sac header I have IDEP= unknown and after removing response it changed to IDEP= VELOCITY (NM/SEC). I have instrument properties in resp.pz file INPUT UNIT : M, OUTPUT UNIT: COUNTS, INSTGAIN : 1.500000e+03 (M/S),SENSITIVITY : … [more]
Raquel Bonilla Alba
2017-04-18 03:14:53 - 2017-04-18 06:09:06
Hello, I have a problem when I try to install sac.
Maria Luíza Cardoso
2017-04-16 13:36:38 - 2017-04-16 21:11:11
Hi everyone, How can I perform deconvolution in the frequency domain by dividing the spectra of the numerator by the spectra of the denominator? Best regards, Maria.
Maria Luíza Cardoso
2017-04-12 15:59:57 - 2017-04-16 12:59:54
Hello everyone, Is there a way to save my sac file in frequency domain, not in time domain? Best regards, Maria.
2017-04-12 22:45:34 - 2017-04-13 05:09:48
Hello, I´m Laura, a student of physics at Universidad Complutense de Madrid, and I need help with the software sac, the program does not initialize (see the picture) , and I can´t work with it. In this picture you can see "20.79 over 3 days" and I don´t know what does this means, I have decompressed the file and installed by the way you told me and I can´t do anything, I don´t know what is the problem. I used linux (ubuntu) 64 bits Thank you, Laura
2017-04-04 22:34:53 - 2017-04-04 23:20:17
Hello all, When I use the transfer command of SAC, I am confused which data type did I get finally. For example, for broadband seismometers we used more often now, the recorded data type is usually the velocity, if I have the instrument response file PZs, I could type: trans from polezero subtype $pzfile to none freq 0 0.001 8 10. Here is the question: while my data is velocity, after 'TO NONE', the output data is displacement? Or just remain the type as original data, velocity. In other word… [more]
2017-04-03 10:57:34
Hello, I need the following sac ascii format. At the moment I forget how to convert this format from the SAC binary format. If you know the procedure, tell me. Thanks in advance.Shutian ------------------------------------------------------------------------- STA=YAK  LAT=  0.00  LON=  0.00  ELEV=   0.0(M) COMP=LHZ  RATE=0.1 TIME=2012,302,03:04:08.000 The complex transfer functions T are calculated by:   T(S)=DS*A0*(S-Z01)*(S-Z02)*...*(S-Zm)/((S-P01)*(S-P02)...(S-Pn))   where:S=i*Omega, Ome… [more]
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07:59:50 v.ad6b513c