Thread: Instrument Responses

Started: 2012-10-09 21:08:22
Last activity: 2012-10-10 14:50:40
Topics: SAC Help
Kimberly Schramm
2012-10-09 21:08:22
Hello!

I am interested in the instrument responses BENBOG, SANDIA, and SANDIA3.
These are built in to the TRANSFER command. Is there a way to export the
responses in some standard format so that the responses can be applied
outside of SAC? I thought about scouring the source code, but I only have
binaries.

Thanks for your help,

--
Kimberly A. Schramm, Ph.D.

  • Sheila Peacock
    2012-10-10 14:50:40
    Dear Kimberley Schramm,

    I have the original Blacknest code for the BENBOG response.
    Here is the relevant snippet containing the poles and
    zeros:

    DATA NPOL(70)/8/,NZER(70)/4/,FRQ(70)/1.0/,
    &CODE(70)/'BEN BOG '/,ACODE(70)/'BEN BOG '/,CC(70)/' '/,
    +FACT(70)/1.0000/,C(70)/0.000E+00/,DEC(70)/1.0/,SAMP(70)/0.0/,
    1POL(1,70)/(-10.539 , 0.0 )/,ZER(1,70)/( 0.0 , 0.0 )/,
    2POL(2,70)/( -5.787 , 7.407 )/,ZER(2,70)/( 0.0 , 0.0 )/,
    3POL(3,70)/( -5.787 , -7.407 )/,ZER(3,70)/( 0.0 , 0.0 )/,
    4POL(4,70)/(-22.21 , 22.21 )/,ZER(4,70)/( 0.0 , 0.0 )/,
    5POL(5,70)/(-22.21 ,-22.21 )/,
    6POL(6,70)/( -0.06283, 0.0 )/,
    7POL(7,70)/(-29.62 , 29.62 )/,
    8POL(8,70)/(-29.62 ,-29.62 )/


    Have you the means to work out the CONSTANT? It is not unfortunately
    in the above snippet.

    You can request the source code of SAC from IRIS. The rules
    prevent me from sending it directly to you, but once you
    have got it, the relevant subroutines are in
    v101.5c/src/sac-101.5c/src/icm

    Yours sincerely,

    Sheila Peacock,
    Blacknest.

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