Thread: ppk?

Started: 2010-01-26 01:38:27
Last activity: 2010-01-26 03:12:19
Topics: SAC Help
Nicolas Houlie
2010-01-26 01:38:27
Hello,

I am looking for some help to pick up times on SAC waveforms. I saw you
can use PPK but I do not find any help on your webpage (nothing in
graphics capabilities).

is this possible to save the times/amplitudes in a file ?

Thanks,

nicolas


Nicolas Houlie
School of Earth and Environment
15-19 Hyde Terrace,
Email: n.houlie<at>leeds.ac.uk

  • Milton Plasencia
    2010-01-26 03:12:19
    Hi,

    First, see the tutorial of Zhigang Peng (Other Basic tools - Phase Pick item)

    http://geophysics.eas.gatech.edu/classes/SAC/

    Then, try this commands:

    Generate a file for the picks, use the command: touch picks

    sac % run SAC
    funcgen % generate impulse function, (here read your time series).
    oapf picks % Open the file where will be written the picks
    ppk % Pick the signal of your interest, use the commands of the
    Peng tutorial, x and left click for zoom, p and s,
    and then q
    on the window for quit of the ppk.
    capf picks % close the picks file. (important)

    In the file picks will be written the information of the picking
    including the amplitude.
    Read the man pages for PPK. (help ppk)

    You can extract the amplitude of the file picks using awk command.

    Cheers,

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

    Dipartimento Centro di Ricerche Sismologiche
    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS

    Borgo Grotta Gigante 42/C
    (34010) Sgonico - TRIESTE - ITALIA
    Tel: +39-040-2140305
    Fax: +39-040-327307

    E-mail: mplasencia<at>ogs.trieste.it

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


    Quoting "Nicolas Houlie" <N.Houlie<at>leeds.ac.uk>:

    Hello,

    I am looking for some help to pick up times on SAC waveforms. I saw you
    can use PPK but I do not find any help on your webpage (nothing in
    graphics capabilities).

    is this possible to save the times/amplitudes in a file ?

    Thanks,

    nicolas


    Nicolas Houlie
    School of Earth and Environment
    15-19 Hyde Terrace,
    Email: n.houlie<at>leeds.ac.uk
    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help

    Email secured by **CeSIT** Check Point gateway




    ----------------------------------------------------------------
    This message was sent using IMP, the Internet Messaging Program.



Page built 07:15:10 | v.b'ea7a92