Thread: Instrument Response Removal

Thanks for your reply Milton. I am using sac version 101.4. I am also
attaching the sample sac data file along with its RESP file for your
testing. Please let me know if it works on your version of sac.

-Mohit




On Mon, Oct 7, 2013 at 12:33 AM, Milton Plasencia <mpplasencia<at>gmail.com>wrote:

Hi Mohit,

Are you using the last version of sac (101.6)?
Can you provide copy of data and response files?

I try the transfer function command with my data and resp files,
and all works OK.

SAC> r AI.JUBA.04.BHZ.D.2013,197,19:40:09.SAC
SAC> rtr
SAC> taper
SAC> transfer from evalresp fname ./RESP.AI.JUBA..BHZ to none freqlim .01
.015 2 5
Using response from user-specified file: (./RESP.AI.JUBA..BHZ).
Extracting evresp response for JUBA, BHZ...
Station (JUBA), Channel (BHZ)
SAC> p

Cheers,

M.



* * * * * * * * * * * * * * * * * * * * * * *
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)
*********************************










On Oct 7, 2013, at 4:54 AM, mohit agrawal <ism21.mohit<at>gmail.com> wrote:

Hi All,

I am trying to remove instrument response but I am getting these errors.
Any one can provide me solution for it ?

SAC> SETBB RESP
"/home/mohit/Ambient_Noise_Processing/NOISE_2012_2/NOISE_GC17_GC18/DATA/2012/244/RESP.X4.GC17..BHZ"
SAC> r ./GC17BHZ
SAC> rtr
Slope and standard deviation are: -1.8385e-06 0.00091153
Intercept and standard deviation are: 0.096362 45.47
Data standard deviation is: 6683
Data correlation coefficient is: 6.8617e-06
SAC> taper
SAC> TRANSFER FROM EVALRESP FNAME %resp TO NONE FREQLIM .01 .015 2 5
Using response from user-specified file:
(/home/mohit/Ambient_Noise_Processing/NOISE_2012_2/NOISE_GC17_GC18/DATA/2012/244/RESP.X4.GC17..BHZ).
Extracting evresp response for GC17, BHZ...

Station (GC17 ), Channel (BHZ )
Nominal Calper not set. Setting Nominal Calper to -999.000000 to
match Wfdisc Calper
Sensor Calper not set. Setting Sensor Calper to 1.000000 to match
Wfdisc Calper
Cannot determine normalization status because NormFreq is outside
bounds of transfer function.
Response appears to be Un-Normalized.
Waveform appears to be scaled.
Wfdisc calib value is (1.000000).
Waveform multiplied by 1.000000 after deconvolution.


Thanks

-Mohit


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--
*Mohit Agrawal
PhD Candidate | Research Assistant | Geophysics (Computational Seismology)
Dept. of Geology | Baylor University
Geophysics Lab, E453R | Baylor University Sciences Building (BSB) |
Office: E454R,BSB.
Phone- 254-710-2172 ( lab), 254-710-2155(office), 281-460-8941(Personal)
Email : mohit_agrawal<at>baylor.edu, ism21.mohit<at>gmail.com
Home Address : Apt # 207, 1500 s, 9th street, 76706, Waco, Texas, USA.*

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