Thread: SAC error 911

Started: 2013-04-17 17:52:09
Last activity: 2013-04-18 01:09:03
Topics: SAC Help
G. Eli Baker
2013-04-17 17:52:09
I want to convert a seismogram to just plus or minus ones, so I use
"abs" to make a second file of absolute values of the seismogram file
and then use "divf" to divide the seismogram file by its absolute
values. This generally works, but on one file I get a fatal error,
specifically SAC error 911. In the online list of SAC errors however,
there isn't an error number 911. Does anyone know what that error is?
Incidentally, it's not that I'm dividing by zero, since the smallest
number in the absolute value file is greater than zero. Also, the file
headers are identical except for depmen and depmin, as one would expect.

Thank you,

Eli Baker


  • George Helffrich
    2013-04-18 01:09:03
    Dear All -

    This arises when decoding a bad Julian date in the file. Zero maybe?

    On 17 Apr 2013, at 17:52, Baker, Glenn E Civ USAF AFMC AFRL/RVBYE wrote:

    I want to convert a seismogram to just plus or minus ones, so I use “abs” to make a second file of absolute values of the seismogram file and then use “divf” to divide the seismogram file by its absolute values. This generally works, but on one file I get a fatal error, specifically SAC error 911. In the online list of SAC errors however, there isn’t an error number 911. Does anyone know what that error is? Incidentally, it’s not that I’m dividing by zero, since the smallest number in the absolute value file is greater than zero. Also, the file headers are identical except for depmen and depmin, as one would expect.
    Thank you,
    Eli Baker
    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help



    George Helffrich
    george.helffrich<at>bris.ac.uk


    • G. Eli Baker
      2013-04-17 18:30:22
      Thank you,
      That was it. The file was from Julian day 1, kztime was zero, and the begin
      time was a very small negative number. I changed the begin time to zero and
      now it works. Much appreciation as I would never have guessed that one.
      Cheers,
      Eli


      -----Original Message-----
      From: George Helffrich [george.helffrich<at>bristol.ac.uk]
      Sent: Wednesday, April 17, 2013 11:09 AM
      To: Baker, Glenn E Civ USAF AFMC AFRL/RVBYE
      Cc: sac-help<at>iris.washington.edu
      Subject: Re: [SAC-HELP] SAC error 911

      Dear All -

      This arises when decoding a bad Julian date in the file. Zero maybe?

      On 17 Apr 2013, at 17:52, Baker, Glenn E Civ USAF AFMC AFRL/RVBYE wrote:



      I want to convert a seismogram to just plus or minus ones, so I use
      "abs" to make a second file of absolute values of the seismogram file and
      then use "divf" to divide the seismogram file by its absolute values. This
      generally works, but on one file I get a fatal error, specifically SAC error
      911. In the online list of SAC errors however, there isn't an error number
      911. Does anyone know what that error is? Incidentally, it's not that I'm
      dividing by zero, since the smallest number in the absolute value file is
      greater than zero. Also, the file headers are identical except for depmen
      and depmin, as one would expect.
      Thank you,
      Eli Baker
      _______________________________________________
      sac-help mailing list
      sac-help<at>iris.washington.edu
      http://www.iris.washington.edu/mailman/listinfo/sac-help





      George Helffrich
      george.helffrich<at>bris.ac.uk



      Attachments
Page built 04:48:25 | v.b'59d0d2