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Active Message Threads for January 2012
maytalsadeh@post.tau.ac.il
Hi,
I am very new to sac (and a bit to seismology in general) and have
started experimenting with sac.
one of my header lines is:
IDEP = JSOP
I didn't find any reference for JSOP.
Any ideas what that could be?
Thanks
Replies
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Re: (no subject) - Arthur Snoke - 2012-01-29 22:42:59
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Re: (no subject) - Onur Tan - 2012-01-30 06:19:48
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Re: (no subject) - Shahar Shani Kadmiel - 2012-01-30 02:08:05
Jose Rial
Has anyone had problems running SAC on Lion? I have, plenty... Lately,
it has been running but I know it'll crash either when I want to plot
anything using p. I get tons of unrequested comments as I am processing
data, such as
setcolor3:0 0 [default]
This appears after almost every command.
Then, it suddenly, and for no apparent reason, crashes, like this
SAC> r curt curtnoint
SAC> p2
SAC> r curt
SAC> p
sac(1081) malloc: *** error for object 0x1008107a0: incorrect checksum
for freed objec…
[more]
No replies
Arthur Snoke
Jose,
I got temporary access to a OS10.7.2 machine but had no problems.
I had sent out a "beta" version of v101.5, and I think someone wrote back
that it had worked okay for them on OS 10.7.2. Still, it is not working
for you, so we need to figure out the reason. Please repeat the steps I do
below and make a file of the screen interactions and send it to me.
Important questions are the version of gcc you are using. (The one
here is the defalt that comes with xcode -- which was put on …
[more]
No replies
Hi;
I'm running SAC on Mac OSX 10.7.2 and thought it installed correctly and
seems to work OK, it crashes a lot. It
crashes sometimes as in the example below after seemingly routine
commands, like read and plot. Sometimes it crashes for
a segmentation fault, without apparent motive, just when plot is invoked.
SAC> lp co .001 n 4 p 2
SAC> p
SAC> xlim 8000 20000
SAC> p
SAC> ls
159.18E 72.82S.txt TALDICE_18O_TALDICE1_8-25ka.txt
HP [Converted].jpg cucu…
[more]
Replies
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Re: sac problems with MacOSx 10.7 - Arthur Snoke - 2012-01-25 01:32:11
Sheila Peacock
Caroline Holden wrote, on 20th January 2012:
Hello,
could you please let me know what would be the sac polezero file for a Milne-Shaw instrument with the following characteristics:
Seismometer period Ts=12
Damping ratio 20:1
Magnification 250
Thank you very much for your help!
Caroline
PS: my guess is:
Zero 2
poles 2
-0.3613 0.3790
-0.3613 0.3790
Constant 250*2*pi
I looked up in Scherbaum ("Of Poles and Zeros", Kluwer, 2001) and
found the following.
First of all, the second pole mus…
[more]
Replies
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Re: pole-zero for Milne-Shaw seismometer - Caroline Holden - 2012-01-25 00:17:47
Steve Gao
Hi,
My understanding was that wsac1 keeps all the header values from the most recent rsac1 call? However, in the following example, file tmp1.z lost all its event/station coordinates and related headers.
Any hints? Thanks. Steve Gao
------------------------------------
nin1='tmp.z'
call rsac1(nin1, x, npts, beg, delta, max, nerr)
nin1='tmp1.z'
call wsac1(nin1, x, npts, beg, delta, nerr)
Replies
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Re: lost headers? - Arthur Snoke - 2012-01-22 04:51:47
Caroline Holden
Hello,
could you please let me know what would be the sac polezero file for a
Milne-Shaw instrument with the following characteristics:
Seismometer period Ts=12
Damping ratio 20:1
Magnification 250
Thank you very much for your help!
Caroline
PS: my guess is:
Zero 2
poles 2
-0.3613 0.3790
-0.3613 0.3790
Constant 250*2*pi
Notice: This email and any attachments are confidential. If received in error please destroy and immediately notify us. Do not copy or disclose the contents.
No replies
Geo .
Hello,
I have converted velocity seismograms to displacement and I see that header
GCARC are not the same. I haven't checked other headers at this time. In
one case, the difference was ~7 degrees. Is there a reason for this? How do
I mitigate this problem.
Thanks for your time!
Januka.
No replies
weitao
2012-01-08 23:49:43
- 2012-01-09 00:57:24
Hi everyone,
I recently update sac into sac 101.5 on centos6.2 and centos 5.5, both
32bit and encountered problems while changing headers using "ch ", as
described bellow.
cat <<EOF >test.sh
funcgen seis
w demo.sac
rh demo.sac
ch t1 12.0
wh
r demo.sac
lh t1
q
EOF
sac < test.sh
As shown in my linux, the header t1 do not exist in demo.sac and moreover
it seems the waveform has been changed.
Is this a bug or it is due to the setup of my linux env?
Any advices ? thanks!
PS. I use the pre-com…
[more]
Replies
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Re: sac101.5 32bit problem: can not change(update) header using sac101.5 - Fabio Dias - 2012-01-09 00:57:24
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Re: sac101.5 32bit problem: can not change(update) header using sac101.5 - Brian Savage - 2012-01-08 23:20:29
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Robert Casey
Hi Margaret-
This question gets to the heart of the SAC builds themselves, which
we do not have control over. We only broker the distribution. I need
to forward your question to the SAC HELP list and see if the list
members can help you address this. Please consider subscribing to the
SAC Help list through the IRIS website where you're sure to get the
best expert answers to your SAC questions.
-Rob
>
> Begin forwarded message:
>
> From: "Doll, Margaret Ann" <margaret_doll@br…
[more]
No replies
*The Observatorio Sismico del Occidente de Panama (OSOP) is pleased to
announce the First SeisComp Workshop for the Americas *
*
*
Date: Sunday, June 3rd to Saturday, June 9th
Location: OSOP, Volcan Baru, Panama
Application Deadline: March 15th, 2012
Slots: 15 (The first 10 participants will receive free room)
Cost: 1,900 USD (includes ice breaker, coffee, snacks, lunch, a gala dinner
and RUMBA. Transportation not included.) 2,500 after deadline.
*Company Description*
OSOP develops, suppor…
[more]
No replies
Branden Christensen
2012-01-02 23:10:25
*Geophysical Software Developer and Programmer, OSOP, Panama*
*
*
OSOP, located in the highlands of Western Panama, has an opening for a
full-time geophysical software developer and programmer. We are looking for
an individual who is versed in geophysical signal processing and at-home in
the Linux environment.
*Company Description*
OSOP provides vertically integrated solutions and turn-key systems for
geophysical monitoring. OSOP develops, supports, installs, maintains and
configures instru…
[more]
No replies
Branden Christensen
2012-01-02 23:09:13
*Electronics Guru and Field System Engineer, OSOP, Panama*
OSOP, located in the highlands of Western Panama, has an opening for a
full-time electronics specialist and field system engineer. We are looking
for someone who can design circuit boards for geophysical applications, is
good with their hands and can install geophysical equipment. Knowledge of
geophysics is a plus.
*Company Description*
OSOP provides vertically integrated solutions and turn-key systems for
geophysical monitoring. OS…
[more]
No replies
Sunil .
Hi SAC user,
I am trying to write the complete sac header for evenly space file using wsac0() in c program.
But i am always getting error or segmentation fault. The problem is that I am not able to understand
what input it is taking to write the complete header information using wsac0() function. what is the 2nd and
3rd input in wsac0(). The code to write the sac file is given here. What is the problem in the code or I would be thankful for your advise to correct the code.
int main(int a…
[more]
Replies
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Re: Now able to write sac header in C - Arthur Snoke - 2012-01-02 02:05:51
