Next message: Bill: "Lunars calculator"
Jim,
The MICA program, produce by the Naval Obseratory, is linked on their
site. I think you can buy it from Wilhemm-Bell. It outputs the
complement of the declination, but you can easily change that by
pasting the output into a spreadsheet.
Fred
On Apr 1, 2005, at 6:07 AM, Jim Thompson wrote:
> For the past couple of springs I have planned the best opportunities
> for
> practising 3-body twilight fixes at nearby Point Prim during the warm
> months. We have nearly 270d horizon at that location. The criteria
> for a
> good viewing night include having the moon with sufficient
> illumination, and
> within a good alt/az window for beginners.
>
> The tables I can make at http://aa.usno.navy.mil/data/ are very
> helpful in
> providing all the rest of the data I need for this, but they do not
> offer
> one particular printout:
>
> Is there an online calculator, downloadable program or spreadsheet that
> would allow me to print out the altitude and azimuth of the moon at a
> given
> hour for a specific lat/long position at civil twilight daily for a
> period
> of several months? I can find lots of ways to predict the alt/az for a
> given day, but I want to build a table to print on one page the moon's
> alt/az for all the days in the coming months, at a given hour.
>
> Header: Moon altitude and azimuth at civil twilight by day for the
> Period
> ___ to ___ at Position Lat __ Long ___.
> Columns: Month/Day, Morning CT, Moon Altitude, Moon Azimuth, Evening
> CT,
> Moon Altitude, Moon Azimuth.
> Rows: Day of the month.
>
> Instead of civil twilight, the table could be generated for a set hour
> in
> the morning and a set hour in the evening, and then I could pick out
> days of
> the month where the moon is likely to be in about the right position,
> and
> work out the precise results for each of those days manually.
>
> Jim Thompson
> http://jimthompson.net/boating/Celestial_Navigation.htm
> --------------------
> Outgoing email scanned by Norton Antivirus
>
