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 September 2010
Marcelo Bianchi
Dear All,
Today I was using the transfer command to remove the instrument from resp
files and found something strange. The transfer evalresp couldn´t find the
RESP file because of a time calculation error.
My file started at 01:45:05.280 and the resp file, here is the output from
SAC and the header from the RESP file:
SAC> lh kzdate kztime
FILE: 2008.330.01.45.05.2800.PD.EW01..HHZ.D.SAC - 1
-----------------------------------------------
kzdate = NOV 25 (330), 2008
kztime = …
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Re: bug on transfer evalresp - Chad Trabant - 2010-09-28 23:11:30
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Re: bug on transfer evalresp - Marcelo Bianchi - 2010-09-29 21:55:36
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Philip Crotwell
Hi
I have a java based seismic file reading package called seisFile that
handles SAC files amongst others
(http://www.seis.sc.edu/seisFile.html).
As part of that I have all the "enumerated header field values" as
constants (ie static final fields). At the time I created this, they
were all unique. I was looking at the sac docs today and noticed that
there have been new values added (51-86). I was going to add them, but
they are no longer unique. For example there are 2 IO "enumerated
headers"…
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Re: sac header enumerated values - Chad Trabant - 2010-09-28 20:46:11
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Re: sac header enumerated values - Philip Crotwell - 2010-09-29 00:57:03
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Panxu Zhang
Hi all,
I download some earthquakes from IRIS. I set time range as 100 before
first P and 600 after first P. But the begin time(B in SAC header) in
SAC file is zero. How could I get the correct time? (assume the time
when earthquake happened is zero, then B should be a number like 600
or something)
I think of a method that, first calculate the first P time as T1MARKER
with TAUP, then change header B as (T1-100). But SAC cannot recognize
the command---"ch b (t1-100)". How could I get it run?
…
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Re: begin time in SAC header is incorrect - Arthur Snoke - 2010-09-25 15:06:26
Samir L.
Dear all,
I work currently with a python script which invokes SAC to process some data.
Since my database usually involves mseed files, I used "ms2sac" to convert them
to sac files.
However, I found out that during the processing steps Polezero files are also
needed.
Could someone tell me what are these files and how I can get them?
Thank you in advance,
Cheers,
Wik.
Replies
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Re: Polezero file - Sheila Peacock - 2010-09-24 19:51:03
srichand prajapati
Sir,
I try to installed the SAC on Cygwin (Cygwin based SAC) but i am not able to installed it. I already registered on IRIS site to get SAC software.
when i run ./configure, its work well
but i try to compile by using make
it show some error in src directory.
please help to installed SAC on Cygwin plateform.
regards
srichand
--- On Thu, 23/9/10, sac-help-request@iris.washington.edu <sac-help-request@iris.washington.edu> wrote:
From: sac-help-request@iris.washington.edu <sac-help-request@…
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Re: Welcome to the "sac-help" mailing list - Chad Trabant - 2010-09-23 19:28:39
Geo .
Greetings,
Could someone please clarify the physical meaning of freqlimits when using
TRANSFER function in SAC? I have read the documentation but for me it still
is a little fuzzy. Does it mean that when we use certain freqlimits, for
example freqlimits 0.01 0.015 100 200, the result we see is a narrow band
passed record with corner frequencies of, in this example 0.15Hz and 100Hz?
If that were the case and if I wanted to have the broadest bandpass
possible, what would be the limits to use? Whe…
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Re: TRANSFER freqlimits - Arthur Snoke - 2010-09-13 21:28:43
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Re: TRANSFER freqlimits - Geo . - 2010-09-14 17:06:40
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Re: TRANSFER freqlimits - Arthur Snoke - 2010-09-14 17:54:46
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Re: TRANSFER freqlimits - Januka Attanayake - 2010-09-14 15:31:44
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NDIKUM
please, I am new in this forum. But i am a user of SAC for some time now.
I seek to know if i could have some software to convert data in sac format
(output from SAC) into SEED and AH format.
Also, I wish to know if there are softwares which can accept data in sac
format as input to produce group velocity maps and inversed structures.
hope you help me out.
Ndikum.
---------------------------------------------------
NDIKUM ERIC NDOH,
C/O C.M.F.I. YAOUNDE,
P.O. Box 6090,
CAMEROON,
WEST AFRICA …
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Re: converting sac data!! - Chad Trabant - 2010-09-10 15:01:33
Zhouchuan Huang
*Dear everyone, *
**
*When plotting using sac, some information such as the network (KNETWK),
station (KSTNM), channels (KCMPNM) and time (KZDATE, KZTIME) will be plotted
together with each seismogram. *
*I wonder if I can add more information, such as distance (DIST) on each
seismogram simultaneously.*
**
*Thank you very much.*
**
*Best wishes,*
**
*Zhouchuan*
--
Zhouchuan Huang
School of Earth Sciences and Engineering
Nanjing University
22 Hankou Road
Nanjing 210093
P.R.CHINA.
Tel: +8613675…
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Re: how to display distance along each seismogram - Milton Plasencia - 2010-09-06 16:52:34
