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 July 2012
Mohit Agrawal
Hello Everyone;
I have couple of questions. I would appreciate If someone can help me.
I want to generate receiver functions from synthetic data and the synthetic
data which I am using is in Z (VERTICAL), R(RADIAL) & T(TRANSVERSE)
format. I have my sac headers for each synthetic data like this :
FILE: 201221001.MO.12543.BHZ - 1
----------------------------
NPTS = 4096
B = 5.000000e-01
E = 2.048000e+03
IFTYPE = TIME SERIES FILE
LEVEN = TRUE
…
[more]
Replies
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Re: Help Needed - vipul silwal - 2012-07-27 11:41:39
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Re: Help Needed - Milton Plasencia - 2012-07-27 13:34:43
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Re: Help Needed - Mohit Agrawal - 2012-07-27 17:08:52
mahinda@gsmb.gov.lk
Dear Sunil,
00 and 10 represent the locations where the bore hole (STS 2 ) seismometer and the shallow Guralp CMT 3G seismometer are installed respectively at PALK station.
rgds
mahinda
SWM SENEVIRATNE
Seconded Scientist (Geophysicist)
Regional Integrated Multi-Hazard Early Warning System (RIMES),
Asian Institute of Technology campus,
PO Box 4 Klong Luang, Pathumthani 12120,
Thailand.
Tel.:…
[more]
No replies
Abderrahim
Dear Sac Users,
I'm PhD student from Morocco , i work on the attenuation of wave seismic .
Is there any macro or script to determine the quality factor Qc using
SAC software ?
Thank you in advance for your reply.
Best Regards
Abderrahim Boulanouar
Replies
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Re: Quality factor using SAC Software - Januka Attanayake - 2012-07-24 11:06:58
Sunil .
(no body)
Replies
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Re: khole in sac - Milton Plasencia - 2012-07-23 16:47:51
George Sand França
Dear Sunil Roy
00 and 10 is location code
Some stations, in particular IRIS stations, use location codes. In this
case you have to enter the location code here. Typically ?00? for STS-1 or
?10? for STS-2 seismometer.
If they has the same SPS they aren't diferents.
Best Regards
Prof. George Sand França
Observatório Sismológico
Universidade de Brasília
www.obsis.unb.br[1]
www.tremordeterra.blogspot.com[2]
61 31071298
Citando sac-help-request@iris.washin…
[more]
No replies
swaroopa
Dear Sir/Madam,
Is there any macro or script in sac to determine the delay times and
slowness for an array of seismic network stations
Please do the needful
thanking you,
with regards,
swaroopa
--
Dr. V. Swaroopa Rani
DST-YOUNG SCIENTIST
Principal Investigator
Earthquake Hazard Group
National Geophysical Research Institute
Hyderabad-606
Ph.9866583493
No replies
Yun Wang
> when reading in a bunch of files represented by wild card
>
> sac> r *.sac
>
> the screen will display the whole list of all *.sac, which is very
> annoying in the programming sense.
> Anyone knows a way to suppress this output? Thanks.
>
> Yun
>
Replies
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Re: suppress "r *.sac" output - Brian Savage - 2012-07-19 15:57:15
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Re: suppress "r *.sac" output - Yun Wang - 2012-07-19 16:15:54
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Stephane Drouet
Dear SAC users,
I am facing a problem with rdseed. I want to convert miniSEED data
into SAC. I have both a miniSEED file and a dataless file, and I used
the command:
rdseed -d -f file.miniSEED -g file.DATALESS
Instead of getting a single output SAC file, I have many of them.
There are no gaps in my miniSEED data but within the volume there are
as many blocks of data spanning different time intervals as output SAC
files.
I would like to know if there is an option with rdseed to tell t…
[more]
Replies
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Re: Conversion SEED to SAC - Robert Casey - 2012-07-18 20:34:56
Oscar Perez Ramirez
Hello everybody, I'm trying to writte a script that does the following:
I have a folder with 3 .SAC files
Each sac file has a value assigned to his t1 variable
lets say:
01.SAC has t1=300
02.SAC has t1=301
03.SAC has t1=302
And i have a file with a column of values, lets say:
"traveltimes.dat"
300.456
301.365
302.568
I want to replace the t1 values in the .SAC files for the ones that are in the file "traveltimes.dat"
I need to do this task for many (up to thousands of .SAC files) and I h…
[more]
Replies
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Re: Help with script - Milton Plasencia - 2012-07-16 06:54:37
Juan Lorenzo
First, many thanks to Milton Plasencia and George Helffrich for their
suggestions.
-Running the conversion programs from within SAC helped a lot. For
example, the scale is automatically set when
reading straight SEGY( for single traces)
-Making sure I had a little-endian output to read into SAC was critical.
cheers,
Juan
--
LSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSU
Juan M. Lorenzo
Associate Professor
Dept. Geology and Geophysics
Howe-Russell Buildin…
[more]
No replies
刘金硕
Dear Sir/Madam,
My master student has encountered the problem when we use the SAC. Can you help me to solve it? Since it is hard for Chinese to linux command to interact with SAC, we try to use the web style to interact with SAC.
When we process the "PlotPK" command, because there exists the cursor interaction, we don't know to handle these type interaction with the font webpage for remote users.
Can give us some suggestions to solve problem? Or may you tell us which sub software pac…
[more]
No replies
Yihe Huang
Dear there,
Whenever I use the command "addf", I encounter this error: "Resulting error
from shift exceeded tolerance (1e-6): 0.00020053". Could I know what does
this error mean?
Many thanks!
Yihe
Replies
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Re: Bug when using addf - George Helffrich - 2012-07-07 16:29:55
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Re: Bug when using addf - Yihe Huang - 2012-07-10 01:44:27
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Ivan Zevallos
Hi All,
Where can I get a SAC for Solaris (on a i386 - 64 bit machine) ???.
If someone knows, please send me the reference.
Regards,
Ivan
Replies
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Re: SAC on Solaris. - Arthur Snoke - 2012-07-09 18:20:43
Tanya
From: Tatiana [mailto:mtanya@post.tau.ac.il]
Sent: Monday, July 09, 2012 7:53 AM
To: 'sac-help@iris.washington.edu'
Subject: plabel
Dear all,
I have a problem with plabel command.
on command: plabel 1 'durnet = %durnet% Mag_dur= %dur_mag% ' position
0.025 0.025 s m
I've got message:
ERROR interpreting command: plabel 1
'
position 0.025 0.025 s m
OUTSIDE ALLOWED RANGE: ^
Allowed range is: 1 …
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Replies
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Re: please, help - Milton Plasencia - 2012-07-09 14:27:13
Dear all,
I have a problem with plabel command.
on command: plabel 1 'durnet = %durnet% Mag_dur= %dur_mag% ' position
0.025 0.025 s m
I've got message:
ERROR interpreting command: plabel 1
'
position 0.025 0.025 s m
OUTSIDE ALLOWED RANGE: ^
Allowed range is: 1 0
Using the command without number of label is ok, but command plabel with
option OFF is not working.
How can I fix this?
Than…
[more]
No replies
Alireza Alinaghi
Dear Colleagues:
Does anyone know how the moving average is done in SAC?
I mean how can I move a window of lets say 10 (degrees, in azimuth) in
steps of 5 (degrees) across the read in files and
calculate the stacked trace for each window?
Is there any macro for doing this?
Thank you in advance for your reply.
Alireza Alinaghi
Replies
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Re: Moving average? - George Helffrich - 2012-07-06 15:23:45
Dear Colleagues:
Does anyone know how the moving average is done in SAC?
I mean how can I move a window of lets say 10 (degrees, in azimuth) in
steps of 5 (degrees) across the read in files and
calculate the stacked trace for each window?
Is there any macro for doing this?
No replies
Dear All:
I am running the latest passoft rpm on a 64-bit RHEL6 system.
(I start with SU data and convert it to SEGY data)
I am trying to convert segy data into sac format. (The segy data can
be read by pql)
I then run sierra2segy -g followed by segy2sac.
Although I get no error messages, the output from sierra2segy only
generates files that are 240 bytes long,
which I can not read with pql. The segy2sac produces no output.
I am guessing my issues arise from the segy binary header …
[more]
Replies
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Re: SEGY 2 SAC - George Helffrich - 2012-07-05 15:26:22
Milton Plasencia
Begin forwarded message:
> From: Milton Plasencia <mplasencia@inogs.it>
> Subject: Re: [SAC-HELP] SEGY 2 SAC
> Date: July 5, 2012 6:54:06 AM GMT+02:00
> To: gllore@lsu.edu
> Cc: sac-help@iris.washington.edu
>
>
> Hi Lorenzo,
>
> The segy files are platform dependent, so yuo must do:
>
> 1) run the segyhdr command included in the PASSCAL distribution.
>
> e.g.:
> macton:TdF milton$ segyhdr 99.160.01.33.00.0848.4
> segyhdr: Version no. 2006.312
>
> 99.160.01.33.00.0848.4 HEADER VALUES
> …
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No replies
On Jul 5, 2012, at 5:40 AM, Milton Plasencia wrote:
> Hi Michael,
> Sac "reads t he files line by line and not column by column.
>
> Try:
> > sac
> sac> funcgen % by default function generator generates the impulse function.
> sac> p % plot data in memory
> sac> w alpha funcgen.dat % save data to file funcgen.dat
>
> I you edit the funcgen.dat file, you see the 1 value in fifth column line tenth, so this
> suggest me that sac read line by line.
>
> H…
[more]
No replies
Michael Bramnik
Hello,
My name is Michael Bramnik, a graduate student at Northern Illinois
University working to wrap up his Master's Thesis in the next few weeks.
I've been using SAC to great effect to analyze my data, but I'm running
into a problem neither myself nor my advisor (nor the SAC user manual) seem
to be able to figure out:
When I "readalpha" data into SAC, I usually import it from a single-column
.txt file (4000 lines). I then "write" to .sac format, and then filter and
plot particle motion, et…
[more]
No replies
Dear all,
I am having trouble making the cut function working as I would like. I
have two sac files with different begin times. I need to extract a
common time window for both.
Looking at the help I found the functions synchronize and cutim which
apparently could do the job. Consequently, I did the following:
read the data
synchronize (with the default option, the 0 on the time axis is common
to both files, which is fine)
then I tried to cut with respect to that time zero (cutim Z time…
[more]
No replies
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LinkedIn
------------
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------------------------------------------
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Accept invitation from Wisawet Wongwai
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No replies
Jechan Park
Dear all.
I have seed files, so I want to convert seed files to sac files.
I executed ms2sac to convert seed files to sac files.
Sac files converted by ms2sac were net read.
Following is viewed in my monitor
Help me.
_________________________________________________________
SEISMIC ANALYSIS CODE [02/01/2012 (Version 101.5c)]
Copyright 1995 Regents of the University of California
SAC> ms2sac ./YDON.GS.BHZ..D.2012.055.000000 YDON.BHZ.sac
Warning - unable to open coord file: /usr/contrib/…
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Replies
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Re: After executing ms2sac, It's difficult to read *.sac files - Denis Lombardi - 2012-07-01 01:29:54
