Thread: sac header

Started: 2009-09-26 17:10:25
Last activity: 2009-09-26 17:31:52
Topics: SAC Help
reza
2009-09-26 17:10:25
Hi every one,

Sac reads the max peak point during the waveform and save them in
Depmax or Depmin.
I want to read Depmax or Depmin in a specific place. For instance in S
group or around T0.
Markptp can read in a specific window but it reads peak to peak and I
want to read only peak in a window range.
I would be pleased if you help me.

Thank you,
Reza,

  • George Helffrich
    2009-09-26 17:31:52
    Dear Reza -

    If you use MacSAC, you can use the built-in function GETVAL. From the
    documentation:


    GETVAL 1,3 (GETVAL 157.32) Data values at 157.32 s in
    each file in memory.
    (GETVAL FILE N 157.32) Data value at 157.32 s in
    file N
    in memory; N integer > 0.

    If you don't have MacSAC, you can use this, if 157.32 represents the
    time that you want the peak amplitude for in the first file in memory:

    cutim (157.32 - &1,delta&) (157.32 + &1,delta&)
    message "&1,depmax is the peak value"

    On 26 Sep 2009, at 07:40, reza rezaei wrote:

    Hi every one,

    Sac reads the max peak point during the waveform and save them in
    Depmax or Depmin.
    I want to read Depmax or Depmin in a specific place. For instance in S
    group or around T0.
    Markptp can read in a specific window but it reads peak to peak and I
    want to read only peak in a window range.
    I would be pleased if you help me.

    Thank you,
    Reza,
    _______________________________________________
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    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help


    George Helffrich
    george<at>geology.bristol.ac.uk


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