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Active Message Threads for May 2021
Sheila Peacock
Dear all,
I extracted data from a SEED file with rdseed and told it to write the RESP files so I could deconvolve the instrument response.
Many of the channels in the SEED file aren't seismic and their RESP files are not useful, but when I tested the response of one of the channels with an impulse, I got an error message as if the "transfer" subprogram had been reading from the wrong file:
SAC> funcgen impulse npts 16384 delta 0.004
SAC> transfer to evalresp subtype RESP.DG.0385F.01.HHZ.good…
[more]
Replies
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Re: evalresp transfer failure - Milton Plasencia - 2021-05-20 20:45:02
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Re: evalresp transfer failure - Sheila Peacock - 2021-05-21 08:07:41
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Aqeel Abbas
Dear All,
I found lag time around 2 seconds for each day in my data by using cross correlation.
1: I modified the KZDATE and KZTIME based on lag time.
2: Later, when I want to compare arrival times for all stations in SAC for teleseismic event modifying header according to event time, (I modified the station files according to events info such as evla, evlo,evdp,kztime and kzdate)
3. But it gives the same arrival time for the corrected and original sac file.
What is the possible wa…
[more]
Replies
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Re: Correct the Lag time - George Helffrich - 2021-06-04 15:18:02
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Re: Correct the Lag time - Pritesh Soni - 2021-07-28 16:41:39
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Re: Correct the Lag time - Milton Plasencia - 2021-08-22 21:20:16
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Re: Correct the Lag time - Pritesh Soni - 2021-08-29 12:58:50
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Re: Correct the Lag time - Milton Plasencia - 2021-08-30 18:58:29
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Re: Correct the Lag time - Wen-Tzong Liang - 2021-08-31 00:57:53
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Re: Correct the Lag time - Geo . - 2021-08-31 10:50:03
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Neil Selby
Hello,
I have noticed that in sac v102 various functions that were in libsacio.a are now in libmsg.a. I guess this means that we need to link programs to libmsg.a as well as libsacio.a, or is the expectation that users no longer need these routines in v102?
To give a a specific example, the function sac_warning_off() is now in libmsg.a - is this function now defunct in v 102 or do I need to link to both libsacio.a and libmsg.a to use it?
Is libmsg.a supplied in precompiled versions of sac or…
[more]
Replies
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Re: libmsg.a - Brian Savage - 2021-05-17 07:18:05
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Re: libmsg.a - Neil Selby - 2021-05-17 12:24:03
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Antef Nava
2021-05-12 20:33:50
- 2021-05-15 15:47:27
Hi everyone, I couldn't find anyone in this place having the same trouble as I am.
I'm writing something like:
SAC> r *.sac
SAC> ppk
and it gives me this output:
ERROR 901: SAC programming logic error : Window resized during PPK
Exiting from PPK because picks are inaccurate after resize.
Window resizing must be done before entering PPK.
I tried to resize the window before the ppk like in these examples: http://ds.iris.edu/files/sac-manual/commands/window.html but it outpu…
[more]
Replies
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Re: ERROR 901: SAC programming logic error : Window resized during PPK - Brian Savage - 2021-05-12 17:19:09
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Re: ERROR 901: SAC programming logic error : Window resized during PPK - Antef Nava - 2021-05-15 15:47:27
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Alessio Lodato
Dear,
i need to filter a signal derived from a seismometer (output in
displacement) from the transfer function of the instrument.
What is the procedure to be followed in SAC?
Thank you in advance.
Regards,
AL
Replies
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Re: Question on filtering signal - Milton Plasencia - 2021-05-11 21:41:59
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Re: Question on filtering signal - Peter Schmidt - 2021-05-11 21:54:46
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R: Question on filtering signal - Alessio Lodato - 2021-05-12 13:59:21
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Re: Question on filtering signal - Milton Plasencia - 2021-05-12 17:09:53
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Re: Question on filtering signal - Milton Plasencia - 2021-05-12 19:55:37
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R: Question on filtering signal - Alessio Lodato - 2021-05-12 20:21:13
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Re: Question on filtering signal - Brian Savage - 2021-05-12 17:26:31
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Guust Nolet
Dear all,
I get an Error: -1 message using plot2 on files I wrote with wsac1. Does anyone know what it means?
It does not seem to be limited to wsac1, for example:
SAC> funcgen boxcar
SAC> w dum1.sac
SAC> funcgen sine
SAC> w dum2.sac
SAC> r dum1.sac dum2.sac
SAC> p2
ERROR -1:
I do not get this when I plot them separately:
SAC> r dum1.sac
SAC> p
SAC> r dum2.sac
SAC> p
Guust Nolet
Replies
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Re: plot2 error -1? - Milton Plasencia - 2021-05-11 21:52:31
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Re: plot2 error -1? - Brian Savage - 2021-05-11 16:06:42
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Re: plot2 error -1? - Guust Nolet - 2021-05-12 15:25:35
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