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Paul,
When you are done please send a copy to me and I will post it on the NavL 
attachment page. I am going to keep that page up for a while unless Dan says 
otherwise. I would also like to see the source code when that becomes 
available. I don?t think I can write code to support it but I am starting to 
study C so it would be interesting to see the code.

Now that we are so close to the end on the NavL list is seem strange that the 
list is so active compared to the NavList. Is this a last dying gasp or 
should we make a last attempt to save the list?
Robert Gainer

>
> From: Paul Hirose 
> Date: 2006/05/21 Sun PM 04:28:36 EDT
> To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
> Subject: Re: Silicon Sea almanac
>
> Alexandre E Eremenko wrote:
> >
> > Sure. But to WRITE this program, you have to input pages
> > and pages of terrible formulas from Meeus to your computer.
>
> I'm developing a Windows DLL to eliminate those terrible formulas, at
> least for C and C++ programmers. For lunar and planetary positions the
> DLL implements the JPL DE/LE ephemerides. Built-in functions convert the
> downloadable text format ephemeris files at the JPL FTP site to
> the binary format compatible with a Windows platform.
>
> Star positions come from the Hipparcos catalog; a subset of that catalog
> (all stars down to mag. 2.7, and all the navigational stars) is in the
> DLL. The user can augment this internal catalog by loading a text file
> of star data.
>
> For time scale conversions, precession/nutation models, coordinate
> system conversions, vector math, etc., the complete IAU SOFA library of
> 121 routines is included.
>
> Beginning with the 2006 edition, these three major components are the
> basis for the Astronomical Almanac.
>
> The DLL should be finished in July. I'd like to say late June, but these
> things always take longer than you think. It's already at an advanced
> stage, able to duplicate the solar, lunar, and planetary tabulations in
> the Astronomical Almanac to full accuracy. Same for the examples of
> rigorous solar and planetary reductions to apparent place in Section B.
> The Polaris declination tables I used in another thread came from the
> DLL too. But there's a lot of little stuff I still need to do.
>
> The DLL will be available free to anyone who wants it. If that Google
> mailing list (which I have not yet joined) has a file section, I will
> put a copy there. In addition, I plan to create a web site where all the
> source code will be available.
>
> I want to emphasize that this is a Windows DLL, not an application. It
> won't be useful unless you're a programmer. Also, it uses the C language
> function call convention, so if you use another language, your compiler
> must have that capability.
>
> Now that I have set an approximate completion date, I had better get to
> work.
>

   

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