Thread: transfer evalresp question

Started: 2014-01-08 19:56:42
Last activity: 2014-01-08 20:28:03
Topics: SAC Help
Robert Green
transfer evalresp question
2014-01-08 19:56:42
Hi,

I have encountered problems using evalresp when using the same routines
that have worked before. The RESP files from a new set of data have
transfer function coefficients of type B in the response coefficient
section which is causing a problem (B054F03 Transfer function type:
B).

The error I get is:


; Stage: 1]):
parse_coeff; parsing (FIR_ASYM), unexpected filter type ('B'),
skipping to next response now
No transfer function applied!
ERROR 2118: No transfer function applied.

In some other RESP files I had the transfer function type on this line
had been D, so I tried manually changing to this and it works, however
i'm not sure whether this is okay to do as I do not know what the
different function types mean.

Does anyone have any suggestions?

Thanks

Rob


--
Robert G Green
Seismology PhD Student


  • Sheila Peacock
    Re: transfer evalresp question
    2014-01-08 20:28:03
    Are Robert Green's "Transfer function type: " letters "B" and "D"
    the ones described on page 72 of the SEED manual, as:

    3 A single character describing the type of stage:
    A — Laplace transform analog response, in rad/sec
    B — Analog response, in Hz
    C — Composite (currently undefined)
    D — Digital (Z - transform)

    ?

    Sheila Peacock

    Seed manual is available via a link on http://www.iris.edu/dms/nodes/dmc/data/formats/#seed

    On 01/08/2014 11:56 AM, Robert Green wrote:
    Hi,

    I have encountered problems using evalresp when using the same routines that have worked before. The RESP files from a new set of data have transfer function coefficients of type B in the response coefficient section which is causing a problem (B054F03 Transfer function type: B).

    The error I get is:

    ; Stage: 1]):
    parse_coeff; parsing (FIR_ASYM), unexpected filter type ('B'),
    skipping to next response now
    No transfer function applied!
    ERROR 2118: No transfer function applied.

    In some other RESP files I had the transfer function type on this line had been D, so I tried manually changing to this and it works, however i'm not sure whether this is okay to do as I do not know what the different function types mean.

    Does anyone have any suggestions?

    Thanks

    Rob




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