Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship

      

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Re: leap seconds a navigational hazard, says expert

From: Paul Hirose (no email)
Date: Sun Aug 10 2003 - 12:55:18 EDT

  • Next message: Richard M. Pisko: "Re: leap seconds a navigational hazard, says expert"

    Paul Hirose wrote:
    >
    > That "if" is where the danger lies. The correction for the difference
    > between time scales is done in software written by fallible humans.

    Here's a GPS receiver which will fail later this year because its
    firmware doesn't allow for a long period with no leap seconds.
    Fortunately, the failure is self-correcting after one second.

    http://www.leapsecond.com/notes/leapsec256.htm

    This old message from 1988 indicates leap second bugs have occurred
    many times. I'm not sure I believe that story about the French,
    though.

    http://www-mice.cs.ucl.ac.uk/multimedia/misc/tcp_ip/8801.mm.www/0022.html

    Does anyone have sight reduction software which allows input of the
    UT1-UTC difference? Does it permit the value to exceed one second?

  • Next message: Richard M. Pisko: "Re: leap seconds a navigational hazard, says expert"



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