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> As far as I know, everyone uses the algorithms described by Jean Meeus. I
> seem to remember that at least one list contributor calculates data as
> needed directly, for virtually any date in the past or future.

I remember an old discussion on the Nav-L list on the best method
of generating an almanac. Using Meeus seems (to me) very hard and time
consuming
(his formulas contain many terms and one has to input a lot of
numerical coefficients). As I remember, Frank proposed a simpler
solution: downolading all ready data from some site on the web.
This was a large file. Frank never said however how his own almanac
works, whether it uses pre-computed data, or computes each time
by Meeus's or similar formulas.

Alex.

   

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