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    Re: Longitude by Sunrise example
    From: Gary LaPook
    Date: 2010 Feb 04, 16:47 -0800

    The table in the N.A. states that it lists the time when the UL is on
    the horizon for both rising and setting so it appears to be a typo in
    the article.
    Marcel Tschudin wrote:
    > Sorry, but I'm not familiar with this method. I only noticed that the
    > LL doesn't agree with what I generally encounter in the context of
    > sunrise or sunset and I wasn't sure whether there was somewhere a typo
    > or not. For 1st July 2009 at 17N and 129E I obtain with my tool the
    > following setting times using Sinclair's refraction formula (don't
    > take the seconds too seriously):
    > LL@30m:   9:59:20 UT
    > UL@30m: 10:01:44 UT
    > This should correspond to "normal" atmospheric conditions. I hope I
    > got it correct.
    > Marcel

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