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
February
January
January
December
November
October
September
August
July
June
May
April
March
February
January
November
October
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 March 2009
Daniel Griscom
[Trying to send this a third time... Dan]
At 1:30 PM +0000 3/28/09, George Helffrich wrote:
>On 28 Mar 2009, at 12:28, Daniel Griscom wrote:
>>At 10:39 AM +0000 3/28/09, George Helffrich wrote:
>>> 1) Undefined character values in the binary file should be
>>>padded with blanks, not trailing zero characters, to their field
>>>lengths (8 or 16 characters, as appropriate);
>>
>>Are you sure? The SACA example I have uses trailing nulls (which
>>surprised me).
>
>Positive. The binary format is…
[more]
No replies
Mohamed Kamaleldin Abdel Galeil Salah
Dear SAC users
I am working on data from a list of seismic stations which have
different types of sensors: CMG-40, CMG-3T-120s, CMG-3ESP, STS-1, and
STS-2. I need to remove the instrument response from SAC files. I
could get information on Poles and Zeros data. However, I could not
find enough information about the normalizing factor and hence, how to
calculate the CONSTANT value.
If any one has information about the CONSTANT of these sensor types, I
will appreciate it!
Regards!
No replies
Dear Sirs/Madams,
I'm the author of a free IRIS-supported Macintosh program called
SeisMac, which uses Mac laptops' built in accelerometers to convert
the laptops into (not very accurate) seismographs. You can find more
about it at <http://www.suitable.com/tools/seismac.html>.
I'm finishing off an update which will let you export selected data
as a binary SAC or ascii SACA file. I think I've got it right (Global
Earthquake Explorer successfully reads the SAC files), but I'd love
to have…
[more]
Replies
-
Re: SAC/SACA file format verification - Chad Trabant - 2009-03-28 04:36:24
-
Re: SAC/SACA file format verification - Daniel Griscom - 2009-03-28 15:28:03
-
Re: SAC/SACA file format verification - George Helffrich - 2009-03-28 20:30:33
-
-
-
Re: SAC/SACA file format verification - George Helffrich - 2009-03-28 17:39:09
Mohammad Youssof Ahmed Soliman
Hi all,
Actually I tried many times to produce a polt for (BAZ vs Time )for the
Receiver functions that I got but I could not.
Could you help me to do that
I am not using sac2000(to use Prof. Herman Package) but I am using
sac(101.1)on linux 64bit machine.
Thanks a lot
with my best regards,
Mohammad Youssof
Mohammad Youssof
PhD Candidate
Geophysics Group
University of Copenhagen
Øster Voldgade 10
1350 København K
Location: 03.1.381
Phone: +45 353-22460
No replies
Amarjeet Jaiswal
Myself Amarjeet Kumar, a 3rd year student of the Department of Exploration
Geophysics at IIT Kharagpur, India.I am very new user of SAC
software, I have got one project based on SAC software.I requested for SAC
software on IRIS..And I installed it on my laptop. I have ubuntu installed
in my laptop.
Whenever I am trying to execute DATAGEN commands, I am getting this
message:-
ERROR 131: sac/datagen directory not found. contact llnl for this
data(peterg@llnl.gov
<https://webmail.iitkgp.ac.in/…
[more]
Replies
-
Re: Datagen is not working - Brian Savage - 2009-03-16 16:03:09
mary
Dear Sir
I have three questions about macros in the SAC:
(1)In the example, particle motion plots are produced for five different two second time windows on the same data file: READ ABC
SETBB TIME1 0
DO TIME2 FROM 2 TO 10 BY 2
XLIM %TIME1 $TIME2
TITLE 'Particle Motion from %TIME1 to $TIME2$'
PLOTPM
SETBB TIME1 $TIME2
ENDDO
(Why is a dollar sign needed after TIME2 in the TITLE command?)
(2)In the example, we need to calculate the tangent of an angle that has already been stored in the b…
[more]
No replies
Charlotte Rowe
Hi, I'm new to the SAC help list so maybe this has been addressed
elsewhere. I have obtained the latest Linux version and have carefully
gone through all the setup instructions on my machine. Unfortunately I
don't have administrative access to my own (institutional-owned) laptop so
have had to put the SAC files into alternate directories and adjust the
paths and environmental variables accordingly.
When I invoke sac, all I get is a Floating Point Exception.
I have put this same version of SA…
[more]
No replies
Zhouchuan Huang
Hello,
I have problem using "merge".
I would like to read file names from another file and make it as variables.
But it seems that the "merge" command needs a full name.
e.g. I can read a file this way:* r 1997.123.*.sac*, it works well.
but when I use merge: *merge 1997.123*.sac*, it returns the error: *Error
108: file does not exist*.
So could you help me? Thank you very much!
--
Zhouchuan Huang
School of Earth Sciences and Engineering
Nanjing University
22 Hankou Road
Nanjing 21009…
[more]
Replies
-
Re: help-"merge" - George Helffrich - 2009-03-09 19:55:41
Alejandro Gallego
Hi could you please tell me what means this error and how can I fix it.
ERROR 0: Resulting error from shift exceeded tolerance (1e-6): 0.00025
Please report bug to: sac-help@iris.washington.edu
this occur when I am usgin plotpk, picking phases
Thanks
Alejandro
No replies
Grant Mott
I am trying to find a time history of displacements. Typically, I have
found that sac files are acceleration time histories. It appears (based on
the header - dependent variable) that there may be displacement data
available. Does anyone know of any time vs. displacement data? Is there a
quick way to narrow my data search to only displacement data?
Thanks!
Grant
