SAC Help

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
2012-07-27 00:58:49 - 2012-07-27 17:08:52
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]
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mahinda@gsmb.gov.lk
2012-07-25 09:01:30
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]
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Abderrahim
2012-07-24 16:58:28
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
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Sunil .
2012-07-23 14:04:04 - 2012-07-23 16:47:51
(no body)
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George Sand França
2012-07-23 13:02:38
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.wash... [more]
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swaroopa
2012-07-20 19:04:48
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
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Yun Wang
2012-07-18 22:50:50 - 2012-07-19 16:15:54
> 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 >
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Stephane Drouet
2012-07-18 23:06:53
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... [more]
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Oscar Perez Ramirez
2012-07-15 20:13:07 - 2012-07-16 06:54:37
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... [more]
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Juan Lorenzo
2012-07-13 19:17:14
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 Build... [more]
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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 p... [more]
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Yihe Huang
2012-07-07 00:59:14 - 2012-07-10 01:44:27
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
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Ivan Zevallos
2012-07-09 19:10:15
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
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Tanya
2012-07-09 15:07:31
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 ... [more]
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Tanya
2012-07-09 14:52:40
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? Th... [more]
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Alireza Alinaghi
2012-07-05 16:25:08 - 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? Thank you in advance for your reply. Alireza Alinaghi
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Alireza Alinaghi
2012-07-05 21:02:03
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?
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Juan Lorenzo
2012-07-05 06:27:50 - 2012-07-05 15:26:22
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 heade... [more]
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Milton Plasencia
2012-07-05 14:00:45
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 ... [more]
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Milton Plasencia
2012-07-05 13:59:19
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. > >... [more]
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Michael Bramnik
2012-07-05 03:57:10
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, ... [more]
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Stephane Drouet
2012-07-03 22:36:32
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 ti... [more]
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Wisawet Wongwai via LinkedIn
2012-07-02 12:58:43
LinkedIn ------------ Wisawet Wongwai requested to add you as a connection on LinkedIn: ------------------------------------------ Sac Help, I'd like to add you to my professional network on LinkedIn. - Wisawet Accept invitation from Wisawet Wongwai http://www.linkedin.com/e/-9ou29g-h4551m8h-1b/ubIx8rFs5oSdYQa2oQHQ-lofPc2q7sw6cHvfFlhxuru/blk/I236088257_125/6lColZJrmZznQNdhjRQnOpBtn9QfmhBt71BoSd1p65Lr6lOfPkOclYTdj8Ue30ScP99bP98pk9gdB8QbP4Vdj4Mcz8MdPsLrCBxbOYWrSlI/EML_comm_afe/?... [more]
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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/contri... [more]
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