Re: Online sight reduction and a question to Frank
From: Alexandre Eremenko
Date: 2012 Mar 19, 21:01 -0400

Thanks, Gary.
Very convenient. I had to reduce about 30 sights, see my next message:-)

Alex

On Mon, 19 Mar 2012, Gary LaPook wrote:

>
> Try this link:
>
> http://aa.usno.navy.mil/data/docs/celnavtable.php
>
> gl
>
> --- On Mon, 3/19/12, Alexandre Eremenko <eremenko---purdue.edu> wrote:
>
> From: Alexandre Eremenko <eremenko---purdue.edu>
> Subject: [NavList] Online sight reduction and a question to Frank
> To: NavList---org
> Date: Monday, March 19, 2012, 3:28 PM
>
> 1. Does there exist a free online sight reduction calculator?
> Of the type Frank has for the Lunars.
> You input GMT, Long and Lat, and it gives you the Sun altitude.
> I remember such things existed in the past...2. Question to Frank: I 
tried to use your calculator for this purpose.
> It indeed computes the altitude. I input some random Lunar distance,
> I only need Sun's or Venus's altitude.
> Is this for the center of the Sun/Venus with no refraction correction?
> Or what? And is the accuracy of this altitude 0'1 for the present time 
(2012)?I tried to reduce one or two altitudes manually, the result disagrees
> with Frank's calculator altitude by few minutes.Alex.
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