Thread: HELP DISPLAY PHASE PICKS

Started: 2013-08-19 00:27:28
Last activity: 2013-08-19 17:05:24
Topics: SAC Help
Avinash
HELP DISPLAY PHASE PICKS
2013-08-19 00:27:28
Hiii,

I am a beginner to SAC and I am trying to pick and display phases on
seismograms using PPK. I will really appreciate some help on this.

SAC>read filename
SAC>p1
SAC>ppk
# using curser, I click on a point and press p to show P-wave pick, then i
press q to get #out of ppk
SAC>p1

but now the plot shows IPUO instead of just P and it shows ISUO instead of
S. I tried assigning t0, t1 to phase picks, and then trying to change the
name using PICKPHASE, but for some reason it doesn't work (or maybe I am
using the wrong command)

SAC>pickphase t0 P
SAC>p1

please please please help :( :(
How do I get SAC to display just P or any phase name or just time picks (no
phase name) ?

Thanks.

Regards,
Avinash

  • Dongdong Tian
    Re: HELP DISPLAY PHASE PICKS
    2013-08-19 17:05:24
    Hi,

    You can store phase picks in Tn, and phase names in KTn.

    SAC> r seis
    SAC> ppk

    # mark P phase as T0, and S phase as T1

    SAC> ch kt0 P kt1 S #### change the name of phase
    pick

    SAC> wh
    SAC> p1
    SAC> q

    In fact, in ppk, if you press the p to mark P phase, the pick is stored in
    A, and phase name stored in KA.
    Then press s to mark S phase, the pick is stored in T0, and phase name
    stored in KT0.


    2013/8/19 Avinash Nayak <avinash07guddu<at>gmail.com>

    Hiii,

    I am a beginner to SAC and I am trying to pick and display phases on
    seismograms using PPK. I will really appreciate some help on this.

    SAC>read filename
    SAC>p1
    SAC>ppk
    # using curser, I click on a point and press p to show P-wave pick, then i
    press q to get #out of ppk
    SAC>p1

    but now the plot shows IPUO instead of just P and it shows ISUO instead of
    S. I tried assigning t0, t1 to phase picks, and then trying to change the
    name using PICKPHASE, but for some reason it doesn't work (or maybe I am
    using the wrong command)

    SAC>pickphase t0 P
    SAC>p1

    please please please help :( :(
    How do I get SAC to display just P or any phase name or just time picks
    (no phase name) ?

    Thanks.

    Regards,
    Avinash



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