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    Re: Cel nav in space
    From: Fred Hebard
    Date: 2005 Jan 5, 01:39 -0500

    On Jan 5, 2005, at 12:28 AM, Frank Reed wrote:
    > For a peek at "early" ideas on cel nav in space, take a look at
    > article 2809 in the 1966 Bowditch (probably written for the 1962
    > corrected edition). It's all obsolete now, but it's interesting to see
    > a perspective that's largely pre-computer.
    > -FER
    > 42.0N 87.7W, or 41.4N 72.1W.
    > www.HistoricalAtlas.com/lunars
    The 1962 Bowditch indeed contain an article 2809 on space navigation.
    I speculate that it may be based on the "Space Navigation Handbook,"
    Navpers 92988, published in 1962. This was referenced a few years ago
    on this list, and copies were available then on Amazon.com or similar.
    The Handbook was developed by a class at the Naval Academy taught by
    Captain PVH Weems, who was recalled to active duty to teach it.  His
    class was composed of four ROTC Ensigns with fresh degrees in
    math/physics/astronomy, etc.  I believe Weems developed H.O. 249, the
    Air Almanac, and, of course, the Weems and Plath firm, which is still
    in business.
    The article and handbook mention various methods of navigation,
    including more-or-less standard position fixing on the earth's surface
    with sextant observations of star altitudes.  Aside from radar ranging,
    the distance to the earth also can be determined by measuring its
    semidiameter.  Many additional techniques are discussed in the book.
    The Bowditch article gives a nice summary.

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