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Active Message Threads for April 2009
Arthur Snoke
In preparing an update for the polezero section of the transfer help page,
I decided to try it (I use polezero files, but not within SAC). I found
that the sample given in the current help message does not work, and would
appreciate comments from those who have used it (successfully).
Also, the documentation claims that the search will look for a polezero
file in ${SACHOME}/polezero/. I tried that, but it did not work.
The sample given is
EXAMPLE: suppose the file was named sro.pz and…
[more]
No replies
Peter Goldstein
Dear Professor Yamada,
Thank you for sharing your problem with getline. This message is
being forwarded to our sac-help mailing list which you can sign up
for at the following link.
http://norman.iris.washington.edu/mailman/listinfo/sac-help
Cheers,
Peter
>X-IronPort-Anti-Spam-Result:
>AisCAMKk9kmCNoJUmWdsb2JhbACWaAEBAQEBCAsKBxG4HINzBQ
>X-AuditID: 82368249-af190bb000004e92-7d-49f707c39d33
>Date: Tue, 28 Apr 2009 22:42:24 +0900
>From: Masumi Yamada <masumi@eqh.dpri.kyoto-u.ac.jp>
>Use…
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No replies
Unfortunately, the file I sent was the unaltered "transfer' help file,
rather than my revised "polezero" subset of that file. The desired file
(I hope) is attached.
---------- Forwarded message ----------
Date: Fri, 24 Apr 2009 14:36:39 -0400 (EDT)
From: Arthur Snoke <snoke@vt.edu>
To: SAC-help Listserv <sac-help@iris.washington.edu>
Subject: [SAC-HELP] polezero option
We are preparing the next update for SAC, and I have been looking at some
"help" files called from within SAC (and in the…
[more]
Replies
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Re: polezero option -- correct file this time - Kuang He - 2009-04-24 23:10:24
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Re: polezero option - George Helffrich - 2009-04-25 21:14:53
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Re: polezero option - Arthur Snoke - 2009-04-26 16:26:24
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Re: polezero option - Chad Trabant - 2009-04-27 23:46:47
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George Helffrich
Dear All -
Here's my rewrite of the polezero response removal text to clarify
some of the issues raised in the version proposed earlier. For sanity,
use a fixed-pitch font to view the text.
------
POLEZERO OPTION:
One of the instrument types is called POLEZERO. This type lets
you
describe a general instrument response by specifying a file which
contains
its poles and zeros. The options in the file are keyword driven and
the
numbers are in free format. You may specif…
[more]
Replies
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Re: Polezero rewrite - Renate Hartog - 2009-04-27 17:49:49
Dear All -
My rewrite will arrive in a separate posting anon. Some comments on
Arthur's:
On 26 Apr 2009, at 14:26, Arthur Snoke wrote:
> Thank you George and Kuang-He for comments. Kuang-He picked up on a
> typo in the equation I wrote. I wrote him off list with a corrected
> version that he said was okay:
>
> (s-z1)*(s-z2)*...*(s-zn)
> ________________________
>
> (s-p1)*(s-p2)*...*(s-pm)
>
> ...
>
>> %%%filters aren't causal, either!
>
> The polezero transfer functions are analog fi…
[more]
No replies
VIAGRA ® Official Site
(no body)
No replies
We are preparing the next update for SAC, and I have been looking at some
"help" files called from within SAC (and in the computer accessible
manual), and have changed a few. Because there were several e-mail
exchanges regarding the polezero option of transfer, I looked closely at
SAC> help transfer
I am attaching my first draft for a replacement of that section of the
transfer help command. Please share comments/corrections, etc.
Others I have already worked on are 04graphics, 09file_…
[more]
No replies
Shahar Shani Kadmiel
I am working on a Macbook pro connected to another monitor in "split
screen" mode. When I plot, XWindows comes up split between both
screens - this is very annoying.
Using VSPACE I tried to change that but only the aspect ratio of the
plot changed - the window still came up split between the two screens.
XVPORT didn't do the job either. How do I make XWindows to come up
only on one screen?
SAC ver. 101.2
OS X 10.5.6
Replies
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Re: VSPACE? - Chad Trabant - 2009-04-21 14:50:01
limm001@yahoo.com.cn
Hello,Mr./Miss
I am trying to remove the response from the SAC data, and I want to know what is the units of "POLES" in the response-file. Thank you very much!
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
Replies
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Re: Remove the response - Onur Tan - 2009-04-16 16:35:36
Chad Trabant
2009-04-10 02:19:00
- 2009-04-13 16:17:58
Melaku,
I can't help you verify the RefTek gain value. If the equipment is
from the IRIS PASSCAL Instrument Center perhaps you can ask them for
more details of the digitizer. If the data was processed by PASSCAL
you might also have the data in SEED format in which case you can use
the rdseed program to create the SAC poles and zeroes file for you.
If you have a manual or any documentation for the digitizer it might
be in there as well.
Chad
On Apr 9, 2009, at 5:46 PM, Melaku …
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Replies
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Re: Calculating the CONSTANT to use to remove instument response - Onur Tan - 2009-04-13 16:17:58
Ayele
2009-04-12 08:49:06
- 2009-04-13 00:07:38
Selam Melaku,
If you got the zeroes and poles files from IRIS/PASSCAL, you should be able to get the constants as well.
once you removed responses from other instruments you can run:
Trans from none to wa
if you want to simulate WA instrument record.
Good luck,
Atalay
--- On Thu, 4/9/09, Melaku Ayenew <mayenew@gmail.com> wrote:
> From: Melaku Ayenew <mayenew@gmail.com>
> Subject: [SAC-HELP] Calculating the CONSTANT to use to remove instument response
> To: sac-help@iris.washington.ed…
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Replies
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YNT: Calculating the CONSTANT to use to remove instument response - Onur Tan - 2009-04-13 00:07:38
Hello Melaku,
I am forwarding this to the sac-help list in the hopes that it may
garner the attention of more expertise.
Your calculation of CONSTANT looks generally correct with the
exception of the 2*pi, it should not be included.
A standard gain STS-2 should be nominally 1500 Volts/meters/second,
which needs to be scaled if you want nanometers. I have no idea what
the digitizer gain for a RefTek 130 is, but lets assume your number is
correct for now.
CONSTANT = A0 * SensorGai…
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No replies
Melaku Ayenew
2009-04-08 23:50:56
- 2009-04-09 04:13:57
Hi All,
I am trying to remove instrument responses from STS_2, CMG3T. CMG_ES
broadband instruments. I got the poles and zeros from IRIS Pascal
Instrumentation. But I have difficulty figuring out what constant I should
use in the *.pz file that has to read by the SAC TRANSFER command. For
example, I was trying to synthesis a WA seismogram by removing the STS_2
response and convoulating the WA response. I used a constant of 1 in this
calcultion. The synthesis seismogrm looks good but the displace…
[more]
Replies
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Re: Calculating the CONSTANT to use to remove instument response - Chad Trabant - 2009-04-09 04:13:57
#DENG XIAO FANG (DENG0035)#
(no body)
Replies
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Re: about reading the data - Onur Tan - 2009-04-04 00:34:46
MARÍALAURA ROSA
Dear Sac user's,
I use SAC to analyze the seismogram, but when I use the sgftops conversion utility to convert the sgf file to ps file, it says that it cannot execute binary file.
I have found some examples on internet, where the command "sgftops" can be used directly in SAC.
SAC> r file.sac
SAC> bd sgf
SAC> p
SAC> sgftops f001.sgf figure.ps
sh:/usr/local/sac/bin/sgftops: cannot execute binary file
Can you give me some advices? Thank you so much.
Waiting to hearing from you.
María
…
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Replies
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Re: (no subject) - Onur Tan - 2009-04-04 00:30:58
agalos
Dear Mohamed Kamaleldin Abdel Galeil Salah
if you know the pole-zeros then you have to multiply the constant of the
digitizer with the constant of the recording instrument and possibly with
2pi.
--
Agalos Apostolos Phd student of Seismology - University of Athens
###Personal Info###
Greek:http://dggsl.geol.uoa.gr/cv/gr_agalos.html
English:http://dggsl.geol.uoa.gr/cv/en_agalos.html
>
> Message: 5
> Date: Mon, 30 Mar 2009 19:03:27 +0100
> From: Mohamed Kamaleldin Abdel Galeil Salah <moha…
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No replies
Philip Crotwell
Hi
Just tried your example sac file with GEE, our education data viewer,
yet another test passed. GEE is here if you are interested.
http://www.seis.sc.edu/GEE
Only additional thing I noticed was the kinst, kstnm and knetwk
headers which were MyInstru, MyStatna and MyNetwor. They should
probably either be somewhat meaningful or set to the null value.
KINST is "Generic name of recording instrument. " and so you could
put something in there to identify either the mac's accelerometer or
maybe …
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