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 May 2010
Paola Morasca
Hi All,
I have a compilation problem (look at the bottom). Is that because I have got the binary sac version for OSX (Version 101.3b) that is compiled for a 64 bit architecture? I have to use -m32 because otherwise I get " missing required architecture x86_64 in file". Should I get the source code to be compiled for 32 bit so that I have the right library? Or maybe there is another solution?
Thank you for the help.
Paola
bash-3.2$ gfortran -m32 -C Masterprogram.o /usr/local/sac/lib/libsac…
[more]
No replies
Isaac Mulamba
2010-05-29 13:23:34
- 2010-05-29 21:42:18
(no body)
Replies
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Re: I can't install SAC-101.3b on cygwin in windows 7 - Arthur Snoke - 2010-05-29 15:28:41
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Re: I can't install SAC-101.3b on cygwin in windows 7 - Aldo Vesnaver - 2010-05-29 21:42:18
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Danilo Domingos
Hello everyone!
Ok, where to begin?
I have to calculate the PGA (peak ground acceleration) of some
events, and to do that I have 2 options:
1) Use the SAC function TRANSFER to convert the original
displacement data to acceleration.
2) Manually convert the data to velocity (using seismometer and
digitizer parameters), and then differenciate to acc.
Why is this 2nd option there?
Because I've tried to understant how to build the POLEZERO file too
many times. The poles and zeros aren't a pr…
[more]
Replies
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Re: Help with polezero, transfer to vel and acc - Arthur Snoke - 2010-05-29 01:40:53
weitao
2010-05-26 16:13:10
- 2010-05-27 21:23:16
Thanks Milton for quick reply.
Since in our later data processing the phase plays an important role, I am
wondering if the interp or decimate will keep the phase in low freqency, for
example lower than 0.4Hz. It seems that the decimate cmd performs an
anti-alias filter, but document on interp does not show that. By comparing
the origin data and interped and decimated ones in a short time gap, say two
seconds, we may find all the decimated data points can be found in the
origin data but interp…
[more]
Replies
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Re: a problem while downsampling sac data with decimate - Arthur Snoke - 2010-05-27 21:23:16
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Re: a problem while downsampling sac data with decimate - Arthur Snoke - 2010-07-09 23:01:13
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Hi All
When I tried to downsample a sac data using decimate command,I encountered a
curious problem on the delta change.
Suppose we have one data with samplng rate 100hz, and we want to downsample
to 1hz.
the cmd I used is
decimate 5, now delta=0.05;
decimate 5 now=delta=0.25
decimate 2 now delta=0.5
decimate 2 now delta=0.999999
in the final step the delta is 0.999999 instead of 1.0. Since our later
processing need to check the consistent of sachdr.delta and we have some
LHZ sac with de…
[more]
No replies
Astrid
Hi all!!
I have problems to picks phases in sac, I use command PLOTPK, but the
phases does not save in header, could someone help me?
Best regards,
Astrid López
Replies
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Re: HELP SAC "picks phases" - Astrid - 2010-05-25 20:28:38
Carolina Buffoni
Dear All,
I'm new with the SAC list help and my problem is that I can't plot traces.
The home machine is running Fedora. I can read the trace and header but when
I try to plot it, this message error appear:
X Error of failed request: BadName (named color or font does not exist)
Major opcode of failed request: 45 (X_OpenFont)
Serial number of failed request: 7
Current serial number in output stream: 11
I would appreciate if you help me with this problem.
Thanks,
Carolina
…
[more]
Replies
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Re: SAC I can't plot - Brian Savage - 2010-05-25 17:10:58
奕敦 陳
Greeting,
I found that my new-installed SAC program alway occupys the memory.
Basically, the SAC program will release the memory space from the forward file when I read a new one.
But in my situation, the memory space is still occupied by the forward read-in file.
Even if I read a new file or input 'deletechannel all'.
This way, when I runs the macro scrip, the memory will run out soon.
The only way to release the memory space is to turn off the SAC and run a new one.
My SAC versi…
[more]
No replies
Nitin Sharma
Hello Sir/Mam,
I am Learning SAC as a beginner. I am
facing Some problem regarding Convolution operation. If I use the command Convolve provided in SAC Then I get Satisfactory results. But If Perform the similar operation in frequency Domain my results do not match with the results obtained using convolve command. What I have done is I took 2 functions (step and Boxcar), compute fft and obtained their .am and .ph files separately.
Then I multiply the both .am files and add up the both .p…
[more]
No replies
Frederik Tilmann
Hi
I can't get fg random to work with pre-compiled 64 bit version:
SEISMIC ANALYSIS CODE [08/24/2009 (Version 101.3b)]
Copyright 1995 Regents of the University of California
SAC> fg random
SAC> lh depmin depmax
FILE: RANDOM01 - 1
--------------
depmin = -nan
depmax = -nan
SAC>
Has anyone else encountered this?
Regards
Frederik
Replies
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Re: fg random in 64 bit 101.3b is broken - Brian Savage - 2010-05-11 23:42:26
gaurav dutta
Dear Sir,
I have got the SAC software as an email attachment in the form
sac-101.3b-linux_x86_32.tar.gz. I have expanded the file using the following
command in the command line
tar -xzf sac-101.3b-linux_x86_32.tar.gz
A sac folder has been created on my desktop. I now need to get started with
the software but i have not been able to figure out how to do so. Please
help me on my further steps.
Gaurav Dutta
No replies
Katie Boyle
Hi,
Are there 64-bit compatible versions of rsac1.f wsac1.f, etc?
Thanks!
Katie
Replies
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Re: 64-bit rsac wsac versions? - Steve Gao - 2010-05-06 20:56:10
Onur Tan
Hello,
How can I convert SAC file to SEG2 format ?
best regards
Onur
for Brian:
The manual of the “write” command on the web and its help file in SAC are different. There is no information about SEGY format in the web page. However their revision date are the same.
Dr. Onur TAN
---------------------------------------------- 40.7866N 29.4500E ---------
TÜBİTAK Marmara Araştırma Merkezi, Yer ve Deniz Bilimleri Enstitüsü
TUBITAK Marmara Research Center, Earth and Marine Sciences Inst…
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Replies
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Re: SAC to SEG2 - Xiaoting Lou - 2010-05-06 19:11:28
陈浩朋
Dear sir:
I am trying to use the "convolve" command in sac2000,but there is
something wrong with it.
I type these commands below:
>r R1.sac R2.sac
>convolve
it produce the following error
>remove this function: src/co/zmemad()
I don't know why.Could you please help me solve this problem.
Yours ,
Chen Haopeng
No replies
Dear sir:
I am trying to use the "convolve" command in sac2000,but there is
something wrong with it.
I type these commands below:
>r R1.sac R2.sac
>convolve
it produce the following error
>remove this function: src/co/zmemad()
I don't know why.Could you please help me solve this problem.
Yours ,
Chen Haopeng
