Thread: Re: Remove Response Instrument

Started: 2013-11-17 22:29:15
Last activity: 2013-11-17 22:29:15
Topics: SAC Help
Milton Plasencia
2013-11-17 22:29:15
look below,


Dipartimento Centro di Ricerche Sismologiche
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS

Borgo Grotta Gigante 42/C
(34010) Sgonico - TRIESTE - ITALIA
Tel: +39-040-2140 256/141
Fax: +39-040-327307

E-mail: mplasencia<at>

ASAIN (Antarctic Seismographic Argentinean Italian Network)

Quoting "amik Amik" <amik.mamat<at>>:

I am working on a local magnitude research. I want to remove
response instrument
from the data and simulate the response of Wood Anderson
seismograph. What should I do?
I have a few questions :
1. Which one the true procedure and command in SAC :
a) SAC> trans from evalresp to none
and then
SAC> trans from polezero subtype "file name.pz" to none

b) SAC> trans to polezero subtype "wood anderson file name.pz"

c) SAC> trans to wa

d) SAC> trans from polezero subtype "sation's file name.pz" to wa
Option d) This is fine if you use the polezero station file.

e) SAC> trans from polezero subtype "sation's file name.pz" to wa to none

f) SAC> trans from evalresp fname RESP.SATION to wa

g) SAC> SAC> trans from polezero subtype "sation's file name.pz"
freq 0.005 0.01 1.0 2.0

2. What the different utilizing of Response File and Polezero File?
Response file include the filter (FIR) coefficients

I think polezero already included in responfile, is it right ?

May you help me? Thank You very much

My suggest ius use:

transfer from polezero subtype "PZ file" to wa freq 0.005 0.01 1.0 2.0

Sincerely Yours



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