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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" 
To: 
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
the
> 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
quite
> 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
in
> 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
that
> 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
book
> is Astronomy. As I am coming into this as a beginner as far as the
Astronomy
> is concerned, I would like to know or understand that this research is
going
> 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@nycap.rr.com
> KC2GUI
www.windsway.com
>
>       Home of the WindReader Electronic Theodolite
>                                Read the WIND
>
> "Victory at all costs, victory in spite of all terror, victory however
long
> 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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