SAC Help

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

This list has moved to https://groups.google.com/a/earthscope.org/g/sac-community.
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Help

Help lists are for submitting support questions. Anyone can post a question for NSF SAGE (or another team) to answer.

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Active Message Threads for September 2017

Edgar Paz
Units for Wood-Anderson in transfer
2016-02-19 23:29:44 - 2017-09-28 01:20:26
Hi, everyone! I'm working on a local magnitude scale and I need to convert data (which is in meters) to Wood-Anderson. I'm not sure if the parameters in transfer for Wood-Anderson (you know, when you write "transfer from none to wa") are set to nanometers, so when I read amplitudes I don't know if they're shown in meters or nanometers. Or maybe I should change my data in meters to nanometers just before using "transfer from none to wa"? Also, do you know how to find "src" to modify wa.c? I can'… [more]
Replies
Rehman .
Band-pass filter
2017-09-20 22:08:15 - 2017-09-21 19:15:12
Hello, I have band passed a teleseismic event waveform with ( bp c 0.01 0.1 n 4 p 2), It filtered the noise and given a nice waveform shape. But buy applying multiple times band-pass filter ( bp c 0.01 0.1 n 4 p 2) to same waveform I observed slight change in waveform every time. Why it is so? Can I work with multiple times filtered waveform?
Replies
Guilherme de Melo
Correlate
2017-09-19 22:15:57 - 2017-09-20 19:42:33
Hello! I have a set of nine p-wave data and I would like to know if there is correlation between it. Someone would know tell me how I should make using "correlate" command in the SAC? Regards, Guilherme de Melo
Replies
Joana Carvalho
sac2ascii
2017-09-19 22:18:10 - 2017-09-20 16:27:43
Hi. I am trying to convert SAC files into ascii files. I found the sac2asc code but I can't compile it. It should be just something like " make sac2asc", but it is not working. Does anyone have another option/version to convert the files from SAC to ascii? Thanks Joana
Replies
Sachin Tiwari
sac graphic problem
2017-09-19 17:06:13
Hi sac users, I have the following sac macro: *sc mkdir GoodOnesdo file wild X4_GC_16/*sac setbb vert $file r %vert qdp off p setbb resp (REPLY "Enter g to copy the file to GoodOnes")if %resp eq "g" then sc cp %vert GoodOneselse Message "...This was a bad event." endifenddo* I want to plot each file and examine it and then send it to GoodOnes folder by typing "g". But the graphic window it shows does not plot anything at all and it is all white. What could be the possible e… [more]
Replies
awaliah_geofisika@students.itb.ac.id
Cut length 1-day data
2017-09-15 00:14:33 - 2017-09-15 01:30:29
Dear All I would like to ask about cut data in SAC. Did SAC provide a function to cut a length of 1-day data from monthly/some days data?? I would be very gratefull for your help. Best Regards, Lia, ITB
Replies
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