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 February 2016
Edgar Paz
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'…
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Replies
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2016-02-20 13:01:47
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Re: Units for Wood-Anderson in transfer - Edgar Paz - 2016-02-26 19:02:32
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2016-02-27 04:14:32
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Re: Units for Wood-Anderson in transfer - Brian Savage - 2016-03-02 17:46:45
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Re: Units for Wood-Anderson in transfer - baigalaa@iag.ac.mn - 2017-09-27 06:00:26
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2017-09-28 01:20:26
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Elisa Buforn
Hi, I try to write a hypo file using sac. According to the help sac it is
possible using command ppk and option H
H Write picks to HYPO pick file {3,4}.
However, when I do it, I obtain the following message
"Could not find VARS vari"
Please, could somebody help me?.
Thanks
--
Elisa Buforn
Catedrática de Física de la Tierra
Dept. de Geofísica y Meteorología
Fac. CC. Físicas
Universidad Complutense
28040 Madrid (Spain)
Phone: 34-913944400
Fax: 34-913944398
email: ebufornp@ucm.es <e…
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No replies
Sheila Peacock
If you know the serial number of one of the Guralp CMG-3T seismometers,
you can get the calibration data sheet by emailing
caldoc@guralp.com
with the serial number in the "subject" line of the email.
Beware that the poles and zeros are quoted in Hz not radians
and are for velocity or acceleration (read the units carefully).
Sheila Peacock.
No replies
Hamdi ALKAN
Dear all,
I try to remove the instrument response for seismograms obtained from IRIS,
ORFEUS.
These seismograms (Full Seed waveform) recorded KOERI broadband stations.
The stations have CMG-3T sensors (120 sec).
For this purpose, I have utilised rdseed, evalresp and SAC programs.
So, I have used following SAC command to remove instrument response;
*rtr*
*taper*
*transfer from evalresp (resp file) to none freqlim 0.01 0.02 0.2 0.4. *
I am not sure this process because of the frequency limit…
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Replies
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Re: Transfer-freq limits - Philip Crotwell - 2016-02-15 19:41:40
Peter Schmidt
Hi
version sac-101.6a (compiled from source 14/10 2014)
I currently writing a small C-utility that needs to be able to read SAC files and for this I'm trying to use the sacio library. The utility shall be able to handle both evenly sampled time-domain data as well as spectral data, thus I first attempt reading the sac file using rsac1, check the error code, nerr, and then attempt with rsac2. Further, in order to silence I first run sac_warning_off(); sac_error_off(); sac_output_off();
…
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