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.
- Email address
- sac-help@lists.ds.iris.edu
- Type
-
Help
Help lists are for submitting support questions. Anyone can post a question for NSF SAGE (or another team) to answer.
- Moderated by
- IRIS Webmaster
- Related tags
- SAC Software SAC
October
September
August
July
June
May
April
March
February
January
September
August
July
June
May
April
March
February
January
December
November
October
September (1)
August
July
June (4)
May (11)
April (3)
March (5)
February (2)
January (8)
November
October
September (1)
August
July
June (4)
May (11)
April (3)
March (5)
February (2)
January (8)
Active Message Threads for April 2021
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
-
Re: Question on filtering signal - Milton Plasencia - 2021-05-11 21:41:59
-
Re: Question on filtering signal - Peter Schmidt - 2021-05-11 21:54:46
-
R: Question on filtering signal - Alessio Lodato - 2021-05-12 13:59:21
-
Re: Question on filtering signal - Milton Plasencia - 2021-05-12 17:09:53
-
-
-
-
Re: Question on filtering signal - Milton Plasencia - 2021-05-12 19:55:37
-
R: Question on filtering signal - Alessio Lodato - 2021-05-12 20:21:13
-
Re: Question on filtering signal - Brian Savage - 2021-05-12 17:26:31
-
-
k.rebeche@craag.dz
hello;
i'am a seismology PhD student.
Currently i'm working on how to evaluate the local magnitude of my region,
but i found some difficulties to determinate the synthetic wood-andersson
seismograme .
my questions are:
when i use the commande transfer from polezero subtype fname to WA, do i
have to deconvoluate the instrument response or i use the raw signal
directly ?
and do i get the synthetic wood-anderson signal ? also, what is the unit
of the amplitude of Wood-Anderson signal ?
can you pro…
[more]
Replies
-
Re: Wood-Anderson synthetic signal - Milton Plasencia - 2021-04-22 22:43:37
Félix Rodrigo Rodríguez Cardozo
Dear all,
One seismogram I am working with has the baseline shifted (down figure1). I
tried to fix it as usual: rmean; trend. However, the axis amplitude
remained exaggerated in comparison to the maximum amplitude. Then I thought
to change the header values DEPMEN, DEPMAX and, DEPMIN (figure 2).
Unfortunately, the problem continues (up figure1).
Any suggestions will be highly appreciated.
Thank you,
Félix
No replies
massa@unisannio.it
Dear All,
I am using the last SAC version on OSX 10.11.6 and I am running into some problems. Following I report a synthesis.
Using ppk perplot … markall on and ohpf:
If I pick P and S waves I can see, in the graphic window (Xquartz), only information about P waves. Moreover, if I write “ohpf NAME.txt” and then “chpf” the .txt file contains only the closing row “10”.
How can I see, in the graphic window , also info about S waves?
How can I write in a text file info about picked wave…
[more]
Replies
-
Re: Problem with PPK OHPF and CHPF - Milton Plasencia - 2021-03-30 20:16:38
-
Re: Problem with PPK OHPF and CHPF - massa@unisannio.it - 2021-04-01 05:35:32
-
-
Re: Problem with PPK OHPF and CHPF - Arthur Snoke - 2021-04-09 07:16:04
Tony Saini
Dear Sir/mam, there is a problem with KZ time. actually, the year is
written 12 rather than 2012 in origin time. can you help me to change this
year in kz time?
Replies
-
Re: KZ time Problem - Milton Plasencia - 2021-04-06 20:38:29
-
Re: KZ time Problem - Tony Saini - 2021-04-07 10:51:07
-
Guust Nolet
I am trying to correct Mermaid hydrophone seismograms for their instrument response, but encounter a problem with the polezero file.
I am running SEISMIC ANALYSIS CODE [03/05/2020 (Version 102.0)] on a Mac Powerbook. The forward conversion from ’none’ to
the instrument response works fine, but going backwards I get an error message. For example:
SAC> funcgen boxcar delta 0.05 npts 2048
SAC> p
SAC> trans from none to polezero S pzmm
Station (-12345 ), Channel (-12345 )
Using polezero respo…
[more]
Replies
-
Re: Sac's transfer command - Brian Savage - 2021-04-06 14:08:27
-
Re: Sac's transfer command - Milton Plasencia - 2021-04-06 20:08:05
Sheila Peacock
Dear SAC users,
I have just had my computer upgraded to Fedora-33 from 29, and my locally compiled copy of SAC-102 has lost the ability to do command-line editing (e.g. pressing the up-arrow does not get me back to the previous command).
I had compiled SAC-102 on Fedora-29 and was running it on Fedora-33, so I did "make distclean" and recompiled on Fedora-33, but with no better luck.
The version of "libedit" that comes with Fedora-29 is v. 0.0.56, and with Fedora-33 is 0.0.63, and there is a…
[more]
