[SAC-HELP] Calculating the CONSTANT to use to remove instument response

[Atalay Ayele]

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 at gmail.com> wrote:

> From: Melaku Ayenew <mayenew at gmail.com>
> Subject: [SAC-HELP] Calculating the CONSTANT to use to remove instument response
> To: sac-help at iris.washington.edu
> Date: Thursday, April 9, 2009, 2:50 AM
> 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 displacemnt values
> don't make sense (they are several hunderd meters). I
> understand it is because of the CONSTANT=1 I put. My
> Question is How can I calculate the correct CONSTANT that I
> need to put with the zeros and poles in the SAC *.pz file.
> The IRIS PASCAL instrumentation page gives the zeros and
> poles and a normalization factor.
> 
> I greatly appreciate your help in this matter.
> 
> Melaku Bogale
> New Mexico State University
> Department of Physics
> Las Cruces NM 88003-8001
> 
> 
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