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 2011
Yannik Behr
Hi,
I am removing the instrument response first using a pole-zero file (SAC
format) and then a RESP file (both extracted from the same DatalessSEED
volume). The resulting traces show a phase shift of around 0.5 s. Is
there anything wrong with the way I'm correcting for the instrument
response? I have attached the script that I used to test this.
Best,
Yannik
--
Yannik Behr
PhD Student in Seismology
School of Geography, Environment, and Earth Sciences
Victoria University of Wellington
P…
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Replies
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Re: differences in instrument response - Milton Plasencia - 2011-02-24 13:26:16
Fiona Darbyshire
2011-02-17 18:50:48
Hello,
Several years ago, I tried making power-spectral-density plots for
noise characteristics of temporary seismograph stations, but it's been
many years since I did this, and I have forgotten the details. One of
my colleagues just sent me a copy of my original macro to ask me about
it, and I find myself second-guessing myself as to whether I did it
right originally. Here's the relevant section of the macro and my
query:
cut 0 1000
r 2011.038.17.00.00.0000.CN.YUK1..HHZ.D.SAC
cut off
transfe…
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Replies
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how to use sac function synchronize effectively - Shutian - 2011-03-21 13:47:07
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Re: how to use sac function synchronize effectively - Januka Attanayake - 2011-03-21 20:46:16
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Re: how to use sac function synchronize effectively - Onur Tan - 2011-03-22 00:04:51
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Warren Caldwell
Hi all,
I believe I've found a bug (unbalanced fopen/fclose) in readsac.m.
When I read in a large number of sac files in Matlab using F=readsac(*
list-of-files-tens-**long*), Matlab hangs and crashes. I fixed it in
sac-101.2/utils/readsac.m by adding an fclose statement as follows:
Original (first line is line 243):
if ~ismember(B(7), 1:6) % non-native byte order
[comp, mxsize, endian] = computer;
Changed:
if ~ismember(B(7), 1:6) % non-native byte order
*fclose(fid…
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Replies
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missing sac_header.h file in sac sac-101.4 - John Nabelek - 2011-02-15 21:44:40
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Re: missing sac_header.h file in sac sac-101.4 - Brian Savage - 2011-02-17 18:35:47
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Re: bug fix in readsac.m (missing fclose) - Brian Savage - 2011-02-16 18:18:17
reza emami
reza.emamy@gmail.com
No replies
Vladimir Karpinsky
Hello,
I am sorry to inform you, that I have trouble with reading CSS 3.0 files
again. There are no errors while reading data, but data are reading
incorrectly. Here: http://geo.phys.spbu.ru/~karp/sac_css/ I put 3 files
with data and plots obtained by SAC and WSG. I see difference between data
types in my wfdisc file and wfdisc file that create writecss: we use s4
(SUN IEEE integer), writecss create t4 (SUN IEEE single precision real).
Help of readcss says that s4 is also supported by SA…
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No replies
Aubreya Adams
Hello,
I have recently upgrade from a PowerPC to an Intel Mac (10.6.6) and am trying to recompile some fortran codes that call upon sac i/o functions. When I try to compile the codes, I get following warning about the sac library and resulting errors:
ld: warning: in /usr/bin/sac/lib/sacio.a, file was built for unsupported file format which is not the architecture being linked (i386)
Undefined symbols:
"_getfhv_", referenced from:
_MAIN__ in cc7sScyY.o
_MAIN__ in cc7sScyY.o
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Replies
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Re: Sac i/o problem with fortran - Arthur Snoke - 2011-02-05 23:56:47
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Re: Sac i/o problem with fortran - Aubreya Adams - 2011-02-06 02:42:48
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cleat zeiler
I am petitioning the help of SAC users to understand pick error. The intial phase of the project is to compare unfiltered events picked by different users. While this is more a test of the users ability to pick seismograms, at a later time we will incorporate other software and determine if there is a bias in the methodologies of establishing picks made by different software, along with algorithms used to process the events with in a software package. We first need to establish a base line and…
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No replies
Milton Plasencia
Thanks to all,
I used year ago this command and did not remember to use,
Ray pointed me in the correct direction.
Cheers,
M
**********************************
Milton P. PLASENCIA LINARES
Dipartimento Centro di Ricerche Sismologiche
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS
Borgo Grotta Gigante 42/C
(34010) Sgonico - TRIESTE - ITALIA
Tel: +39-040-2140136
Fax: +39-040-327307
E-mail: mplasencia@ogs.trieste.it
ASAIN (Antarctic Seismographic Argentinean Italian N…
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No replies
Hi,
I try the spectrogram commands OK, i want save the plot in files
postscript or another format, how i can accomplish this?.
Regards,
Milton
**********************************
Milton P. PLASENCIA LINARES
Dipartimento Centro di Ricerche Sismologiche
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS
Borgo Grotta Gigante 42/C
(34010) Sgonico - TRIESTE - ITALIA
Tel: +39-040-2140136
Fax: +39-040-327307
E-mail: mplasencia@ogs.trieste.it
ASAIN (Antarctic Seismographic Arge…
[more]
