Thread: Time is of the essence

Started: 2007-01-16 18:12:51
Last activity: 2007-01-17 03:08:49
Topics: IRIS EPO
Jerry Cook
2007-01-16 18:12:51
Hi All,
I am having trouble with my computer clock. Every morning when I come in I ping "atomic clock sync" and my clock is off by about 3.5 minutes. I have the program set to ping automatically but that only happens once a day. Is there a way to automatically ping more often? Why is my clock so inacurrate?
J. Bob

  • Dennis Griner
    2007-01-16 23:49:10
    I just recently received and as1 and was wondering what is the
    optimal gain for the helicorder to where you get earthquakes but not
    as much kid noise. I have mine set to 1 currently but is that
    sensitive enough to pick up events?
    On Jan 16, 2007, at 9:12 AM, Jerry Cook wrote:

    Hi All,
    I am having trouble with my computer clock. Every morning when I
    come in I ping "atomic clock sync" and my clock is off by about 3.5
    minutes. I have the program set to ping automatically but that only
    happens once a day. Is there a way to automatically ping more
    often? Why is my clock so inacurrate?
    J. Bob

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    Dennis Griner
    5th Grade Highland Terrace
    dennis.griner<at>shorelineschools.org




    • TKBravo
      2007-01-17 03:08:49
      Hi Dennis,

      The optimal gain for your AS-1 is going to be unique to your station,
      depending on where your instrument is set up and the local noise
      conditions. However, a value for the gain between 25-50 is ideal.
      Likely, you will need to experiment a bit to find your optimal setting.
      Start with a setting such that the background noise is just visible.
      Over time, if your trace is too noisy, adjust the gain to a lower value.

      Good Luck!
      Tammy

      Quoting Dennis Griner <dennis.griner<at>shorelineschools.org>:

      I just recently received and as1 and was wondering what is the
      optimal gain for the helicorder to where you get earthquakes but not
      as much kid noise. I have mine set to 1 currently but is that
      sensitive enough to pick up events?
      On Jan 16, 2007, at 9:12 AM, Jerry Cook wrote:

      Hi All,
      I am having trouble with my computer clock. Every morning when I
      come in I ping "atomic clock sync" and my clock is off by about 3.5
      minutes. I have the program set to ping automatically but that only
      happens once a day. Is there a way to automatically ping more
      often? Why is my clock so inacurrate?
      J. Bob

      _______________________________________________
      irised mailing list
      irised<at>iris.washington.edu
      http://www.iris.washington.edu/mailman/listinfo/irised

      Dennis Griner
      5th Grade Highland Terrace
      dennis.griner<at>shorelineschools.org







      --
      Tammy Katherine Baldwin de Bravo
      Department of Geological Sciences
      Indiana University
      1001 East Tenth Street
      Bloomington, Indiana 47405



14:11:06 v.