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    Re: Refraction
    From: Fred Hebard
    Date: 2005 Aug 8, 00:53 -0400

    On Aug 6, 2005, at 4:16 PM, Ken Gebhart wrote:
    > On 8/4/05 7:56 AM, "Fred Hebard"  wrote:
    >> Marcel,
    >> You can download copies of the Air Almanac from
    >> Fred
    > Fred,
    > You say this is the Air Almanac, but it is the Pub 249 set.  If anyone
    > knows
    > how to see either the Nautical or Air Almanacs, I would certainly like
    > to
    > know
    > Ken Gebhart
    Right you are.  I noticed the error when making subsequent posts, but
    didn't correct it.  My apologies.  I don't know of online sources of
    the almanacs, although I just received the new MICA, version 2.0.
    Just to repeat information posted earlier, MICA is the _M_ultiyear
    _I_nteractive _C_omputer _A_lmanac, for which one has to pay a nominal
    fee.  It was prepared by the U.S. Naval Observatory.  It is shipped on
    a CD with printed manual and available for both Mac & PC.  The Mac
    version requires OS 9.2.2 or higher, but they recommend a G3 processor
    or higher. The PC version requires a 200-Hz Pentium or higher and
    Windows 98 or higher.  It is good for the years 1800 to 2050, and
    available from Willbell.com, Celestaire.com, and other stores.

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