Thread: Re: constant for poles and zeros

Started: 2009-04-01 08:57:46
Last activity: 2009-04-01 08:57:46
Topics: SAC Help
2009-04-01 08:57:46
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

Agalos Apostolos Phd student of Seismology - University of Athens
###Personal Info###

Message: 5
Date: Mon, 30 Mar 2009 19:03:27 +0100
From: Mohamed Kamaleldin Abdel Galeil Salah <mohamed.salah<at>>
Subject: [SAC-HELP] Poles and Zeros
To: sac-help<at>
Message-ID: <20090330190327.aeismdjgo40w84cg<at>>
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Dear SAC users

I am working on data from a list of seismic stations which have
different types of sensors: CMG-40, CMG-3T-120s, CMG-3ESP, STS-1, and
STS-2. I need to remove the instrument response from SAC files. I
could get information on Poles and Zeros data. However, I could not
find enough information about the normalizing factor and hence, how to
calculate the CONSTANT value.
If any one has information about the CONSTANT of these sensor types, I
will appreciate it!


12:07:57 v.f0c1234e