Thread: question on decimate

Started: 2020-07-02 12:37:57
Last activity: 2020-07-03 09:05:29
Topics: SAC Help
Avinash
2020-07-02 12:37:57
Hi SAC users,
Does SAC provide a library function to decimate a time series (similar to
the functionality of the decimate command) that can be used in C/Fortran
codes similar to functions provided to cross-correlate (crscor) and filter (
xapiir) waveforms ? Is there an alternative C library that is as good as
SAC for this ? I think it would involve two steps - an anti-aliasing filter
and then the actual decimation.
Thanks for your help.
Regards,
Avinash

--
Avinash Nayak,
Postdoctoral Scholar (Geophysics),
Earth and Environmental Sciences Area,
Lawrence Berkeley National Laboratory, CA

  • Milton Plasencia
    2020-07-03 09:05:29
    Hi,

    You can to find the C routine of decimate in the source SAC distribution,
    untar it, and in src/scm/xdecimate.c

    HTH,

    Milton

    ************************************
    Milton P. PLASENCIA LINARES
    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS
    Borgo Grotta Gigante 42/C
    (34010) Sgonico - Trieste - Italia
    Tel: +39 040 2140 156 (Udine)
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    E-mail: mplasencia<at>inogs.it

    Antarctic Seismographic Argentinean Italian Network (ASAIN)
    **************************************


    On Thu, 2 Jul 2020 at 21:44, Avinash (via IRIS) <
    sac-help-8966.45720-bounce<at>lists.ds.iris.edu> wrote:

    Hi SAC users,
    Does SAC provide a library function to decimate a time series (similar to
    the functionality of the decimate command) that can be used in C/Fortran
    codes similar to functions provided to cross-correlate (crscor) and
    filter (xapiir) waveforms ? Is there an alternative C library that is as
    good as SAC for this ? I think it would involve two steps - an
    anti-aliasing filter and then the actual decimation.
    Thanks for your help.
    Regards,
    Avinash

    --
    Avinash Nayak,
    Postdoctoral Scholar (Geophysics),
    Earth and Environmental Sciences Area,
    Lawrence Berkeley National Laboratory, CA

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09:29:19 v.9a3bf08e