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Re: Estimating horizon from a photo on a clear night
From: Bill Lionheart
Date: 2024 Dec 14, 19:26 +0000

Cool. We could just fit the higher altitude stars and then look for
the ones that did not fit. But also we could fit a model including
refraction and make a more elaborate model that gave effectively
circles of small constant altitude.

Bill

On Sat, 14 Dec 2024 at 19:16, NavList Community  wrote:
>
> Re: Estimating horizon from a photo on a clear night
> From: Frank Reed
> Date: 2024 Dec 14, 09:59 -0800
>
> Do it by refraction. Refraction is dramatically non-linear near the horizon, 
so if you can see enough stars in your photos, you can certainly locate the 
horizon even when it is lost in darkness or haze or otherwise not directly 
visible.
>
> Frank Reed
>
> 
>
>
>

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