JEAN PARROT wrote to JAMES BRADLEY, "Sphere !" on 07-07-05 09:01

 JP>          Hello James, I wish you a nice day!

 JB> Now that *could* be handy. Today, I buy some astral nav CD from the
 JB> second hand store for two bucks. I didn't look for distance
 JB> conversion, but there is freeware to do that too.

 JP>         If you are interested, I could send you a CD from the
 JP>   London Observatory that is meant for astro navigation. In it is
 JP>   an app to get distance and heading from A to B. This is what the
 JP>   astro triangle does too but resolves it in degrees instead of
 JP>   miles. A conversion from one to the other is easy as a minute is
 JP>   one nautical mile. ( 60 to one degree ).

I'll be! That can be like asking how big an acre is. "Depends where
 you're buyin'."

 JP>         A condensed triangle...if on the 21 June, you stand ot the
 JP>   north pole, at noon, the sun is on the horizon, it altitude is

No, it's altitude is rather high, but I suspect you're talking altitude
 it 'appears' above curvature.

 JP>   zero. This will increase as you move south to be 90o when you
 JP>   get to the equator. Get it ?

No... Wouldn't the sun *never* touch the horizon on June 21, at true
 N.pole?   What about the refraction from atmosphere,
 saying nothing how long it take our venturer to walk that far...

 JB> The program you poured over, sounds like a NASA project, rather than a
 JB> newbie torture device. You were supplied enough to debug it as you
 JP>         I was luciky, I did not have to debug it at all. Ran good
 JP>    first try. All this in BASIC of course.

Mom had a PET at home. A lot of the languages pioneered on that, appear
today as ports to the PC.

Do you have netmail there, JP?


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