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    Re: Celestrial Navigation
    From: Glendon
    Date: 2002 Jul 1, 09:53 +1000

    Hi Vic,
    For a while something went wrong with my subscription to the group and I did
    not receive any mail....simply a matter of subscribing again.
    There are many PC programs available for sight reduction. Some of them are
    old, DOS based, and I find a bit clumsy to use. Typical of these are the
    GRUPP suite by George Rupp, and NAVCHK. I think I got these from the NIMA
    site, . Other useful sites are http://www.navcen.uscg.gov/ , and
    http://aa.usno.navy.mil/ . Also useful is Andre Ruiz site,
    http://www.geocities.com/andresruizgonzalez/ . Another source is
    http://www.boat-links.com/boatlink.html . And there are also some programs
    on the NavList webpage, of course.
    Amongst the more modern ones which I like is Navigator 32 available from
    www.tecepe.com.br/nav .
    Lee Martin
    ----- Original Message -----
    From: "Vic Fraenckel" 
    Sent: Monday, July 01, 2002 8:26 AM
    Subject: Celestrial Navigation
    > I joined this Mail List back in March. I have not received any mail from
    > list in the past month or two. Is anyone out there any more?
    > I have wanted to do tableless celestrial navigation on my computer for
    > some time and have been searching for a way to do this. My trusty Google
    > engine finally hauled me to Paul J. Heafner's "Funamental Ephemeris
    > Computations" and the "JPL Planetary and Lunar Ephemerides" CDROM. I have
    > been studying the book to try and get an understanding of what's going on
    > there. In the past couple of months I have progressed about 1/3 of the way
    > thru the book and have tried out many of the routines found there. Now
    > I have invested a goodly amount of time in this project I have come to the
    > point of wondering if I am barking up the wrong tree. The focus of the
    > is Astronomy. As I am coming into this as a beginner as far as the
    > is concerned, I would like to know or understand that this research is
    > to provide me with what my goal is - tableless celestrial navigation.
    > Programming is NO mystery to me as a retired Software Engineer. I am
    > assuming that given the understanding of extracting data from the JPL
    > Ephemerides and massaging it with software will yield me the figures that
    > are equilvalent to those that we all can find in the Nautical Almanac and
    > that I will end up with the proper algorithms to go from sextant to a
    > position that is reliable.
    > ANY enlightenment would be greatly appreciated.
    > TIA
    > Vic
    > ________________________________________________________
    > Victor Fraenckel - The Windman                 vfraenc1{at}nycap.rr.com
    > KC2GUI
    >       Home of the WindReader Electronic Theodolite
    >                                Read the WIND
    > "Victory at all costs, victory in spite of all terror, victory however
    > and hard the road may be; for without victory there is no survival."
    > - Winston [Leonard Spencer] Churchill (1874 - 1965)
    > Dost thou not know, my son, with how little wisdom the world is governed?
    > -Count Oxenstierna (ca 1620)

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