[SAC-HELP] FIR filter part of the instrument response

[Milton Plasencia]

Hi Patty,

In general the sensitivities of digital filters are 1. 
But, for this need check the code of transfer if
it considers these sensitivities.

Can you share your resp files?

Cheers,

Milton

* * * * * * * * * * * * * * * * * * * * * * *
Milton P. PLASENCIA LINARES

Centro di Ricerche Sismologiche (CRS)
OGS - Istituto Nazionale di Oceanografia 
           e di Geofisica Sperimentale 

Borgo Grotta Gigante 42/C
(34010) Sgonico - Trieste - Italia
Tel: +39 040 2140 141 (Udine)
Tel: +39 040 2140 256 (Trieste)
Cel.: +39 331 6481 935
Fax: +39-040-327307

E-mail: mplasencia at inogs.it

ASAIN (Antarctic Seismographic Argentinean Italian Network)
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On Feb 19, 2014, at 2:18 AM, Peiying Lin <patty.lin at asu.edu> wrote:

> Hi all, 
> 
> I have two RESP files.
> These two are very similar except numerator coefficients are different at 3 stages. Gain and sensitivity values are all the same. 
> 
> But it seems to me that SAC does not have a way to keep track of the digital/FIR filter part of the instrument response. Therefore, no matter which RESP file I used, the amplitudes of  traces after removing instrument response are still the same. but it should be 2.94 times different. 
> 
> Do anyone have a clue how we can retrieve a pole-zero file which considering gain and the numerator coefficients in all stages? 
> 
> Thank you. 
> 
> Cheers,
> Patty
> 
> -- 
> ********************************************
> Peiying Patty Lin
> Postdoctoral Research Scientist
> Lamont Doherty Earth Observatory
> http://www.ldeo.columbia.edu/~pattylin/
> ********************************************
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