Thread: End-Date SAC's file

Started: 2015-01-17 00:48:19
Last activity: 2015-01-19 18:56:59
Topics: SAC Help
Matteo Bagagli
2015-01-17 00:48:19
Hello to all,
I'm new to the mailing list, I'm a researcher from Pisa.
Now my question in basically simple, but I don't think the answer will be
the same.
As I pointed out in the mail-object, I was wondering how I could get the
FINAL date
of the time series I've read in SAC 101.6a??
To make it clearer, if I use the "ppk" function and click over the last
sample of the plot
it appears on screen the relative date: how can I export that date from
SAC?
In the header I could get only the START DATE ( NZYEAR NZJDATE NZHOUR ecc..)
Anyone have tried before? Suggestions?
Thanks in advance!
Have a great weekend!

mat

  • Milton Plasencia
    2015-01-17 01:51:56
    Hi Mateo,

    In Sac header you can NTPS: number of points.
    and DELTA: interval between samples.
    so, multiply NTPS*DELTA and obtain the
    seismogram duration in seconds
    then add it to KZTIME.

    try:

    sac> funcgen seismogram
    sac> lh
    here NTPS=1000, DELTA=1e-2, so 10 seconds of record.

    HTH,

    Milton P. Plasencia Linares
    mpplasencia<at>gmail.com



    On Jan 16, 2015, at 16:48, Matteo Bagagli <matteo.bagagli<at>gmail.com> wrote:

    Hello to all,
    I'm new to the mailing list, I'm a researcher from Pisa.
    Now my question in basically simple, but I don't think the answer will be the same.
    As I pointed out in the mail-object, I was wondering how I could get the FINAL date
    of the time series I've read in SAC 101.6a??
    To make it clearer, if I use the "ppk" function and click over the last sample of the plot
    it appears on screen the relative date: how can I export that date from SAC?
    In the header I could get only the START DATE ( NZYEAR NZJDATE NZHOUR ecc..)
    Anyone have tried before? Suggestions?
    Thanks in advance!
    Have a great weekend!

    mat
    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help


    • Matteo Bagagli
      2015-01-19 18:56:59
      Thanks a lot Milton!
      I'll even use the bash function "date" to have the right extreme of the
      date.
      Because i need to have the values for the time axis to plot with GMT.
      Thanks again, have a nice week!
      Matteo


      2015-01-16 17:51 GMT+01:00 Milton Plasencia <mpplasencia<at>gmail.com>:

      Hi Mateo,

      In Sac header you can NTPS: number of points.
      and DELTA: interval between samples.
      so, multiply NTPS*DELTA and obtain the
      seismogram duration in seconds
      then add it to KZTIME.

      try:

      sac> funcgen seismogram
      sac> lh
      here NTPS=1000, DELTA=1e-2, so 10 seconds of record.

      HTH,

      Milton P. Plasencia Linares
      mpplasencia<at>gmail.com



      On Jan 16, 2015, at 16:48, Matteo Bagagli <matteo.bagagli<at>gmail.com>
      wrote:

      Hello to all,
      I'm new to the mailing list, I'm a researcher from Pisa.
      Now my question in basically simple, but I don't think the answer will be
      the same.
      As I pointed out in the mail-object, I was wondering how I could get the
      FINAL date
      of the time series I've read in SAC 101.6a??
      To make it clearer, if I use the "ppk" function and click over the last
      sample of the plot
      it appears on screen the relative date: how can I export that date from
      SAC?
      In the header I could get only the START DATE ( NZYEAR NZJDATE NZHOUR
      ecc..)
      Anyone have tried before? Suggestions?
      Thanks in advance!
      Have a great weekend!

      mat
      _______________________________________________
      sac-help mailing list
      sac-help<at>iris.washington.edu
      http://www.iris.washington.edu/mailman/listinfo/sac-help




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