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 2009
Guust Nolet
Can Brian or anyone else tell me what the plans are to provide the
sacio.a library for 64 bit machines? This seems an urgent matter to me
because most of us have tons of software that we cannot recompile with
a 32 bit flag without getting into messy problems.
best wishes,
Guust
nolet@geoazur.unice.fr
Geosciences Azur
250, Rue Albert Einstein
06560 Sophia Antipolis
France
+33.4.92.94.26.32
http://geoweb.princeton.edu/people/faculty/nolet/
Replies
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Re: sacio.a on 64 bit machines - Brian Savage - 2009-02-26 18:16:46
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Re: sacio.a on 64 bit machines - Marcelo Bianchi - 2009-02-27 02:16:03
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Re: sacio.a on 64 bit machines - Sebastian Heimann - 2009-02-27 18:45:18
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Omar Bin Afif
Hi Sac,
I set up a Facebook profile where I can post my pictures, videos and events and I want to add you as a friend so you can see it. First, you need to join Facebook! Once you join, you can also create your own profile.
Thanks,
Omar
To sign up for Facebook, follow the link below:
http://www.facebook.com/p.php?i=1128824526&k=541X536RUYVM5FCHXC3TSS&r
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No replies
Melaku Ayenew
hi all,
I am new to sac i was wandering if somebody can tell me
What comand(s) in sac allows to measure the period for ms and ml amplitude .
And how do I get the amplitude for mL and ms estimates.
melaku
New Mexico State University
No replies
Grant Mott
I am a VERY new user for the SAC data files and working on a window system.
Currently, I'm using a MATLAB function (rsac) to convert sac files to a
usable data format (3 columns: time, dependent variable, header
information). I've been able to figure out the time units used, but am
having trouble deciphering the units, magnitude, and form of the dependent
variable. How can I determine if the dependent variable is acceleration,
displacement, velocity, etc? Also, is there a way that I can de…
[more]
No replies
Mohamed Kamaleldin Abdel Galeil Salah
2009-02-11 22:44:38
- 2009-02-17 00:32:46
Hi all,
I have some BB SAC files for a sensor CMG-40TD (Guralp systems) and I
want to remove the instrument response from the seismogram.
I prepared a file ´pz´'as follows:
ZEROS 4
0 0
0 159
POLES 3
-50.0 0.0
-0.02356 + j0.02356
-0.02356 - j0.02356
CONSTANT -0.314
I have two questions:
1. Is such data ok for the instrument type given above?
2. when I run the command: transfer from polezero subtype pz to none,
from within SAC, I get the following message:
Extracting poleze…
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Replies
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Re: How to remove the instrument response? - Sheila Peacock - 2009-02-16 18:12:40
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Re: How to remove the instrument response? - Onur Tan - 2009-02-17 00:32:46
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Sanne
Hi everyone,
When I remove the instrument response, by poles&zeros or response files, I
come across the following messages/errors:
* Calper is not available. Cannot tell if response is normalized, so
transfer function will be used without scaling.
* Calib is not available. Cannot tell if scale factor has been applied on
input, so transfer function will be used without scaling.
* WARNING: FIR normalized
Would you know what one of more of these messages mean?
Thanks a lot for helping me out,
S…
[more]
No replies
Talal
Dear Sac user's,
My problem is I can't read my file after saving it to the disk.
For example, the original file is the amplitude file in x,y file type. Then, performing the division operation by other file, and then FFT, will produce the spectral data file type. Which I have to save it on my disk as a file(in binary or ASCII).
The problem is, when, I save it using the command "WRITE SAC" it successfully saves my file, as binary, spectral file.
But, when, I use the command "WRITE SP", with n…
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No replies
Stanton, Megan
If you are looking for the actual commands to make picks look in the
command listing for plotpk for all the options. Just place your cursor
on where you want to make the pick and then type in the desired
attributes. Usually you have (e)mergent or (i)mpulsive, (u)p or (d)own,
quality (0,1,2,3,4), (p)wave or (s)wave. The letters or numbers in
parenthesis are what you would type. Once you are done it will show you
your pick and label it. Re-pick by moving the cursor and typing it in
again.
http://…
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Replies
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Re: FW: Help on PLOTPK - Arthur Snoke - 2009-02-10 03:01:56
hi all,
I am just starting to learn sac ,and have some difficulties using the PLOTPK
command, I know it produces a plot for picking of arrival time, by problem
is how i pick those arrival times after i got the plot with a x-y cursor. Do
i need to creat hypo file to store the picks, please be more explicit.
thank you
melaku Bogale
New Mexico State University
