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In my humble opinion, the last word on rainbows and the eternal question of 
where am I and where should I be.
This is transcendental.
Francis
https://www.youtube.com/watch?v=PSZxmZmBfnU

-----Original Message-----
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Don Seltzer
Sent: 14 August 2017 16:24
To: francisupchurch@gmail.com
Subject: [NavList] Re: Position by rainbow?

Which leads to the question which part of the rainbow is 42°?
It seems that the red ring is 42°, while the visible blue is 40°

Don Seltzer

On Mon, Aug 14, 2017 at 1:53 AM, Frank Reed 
wrote:

> Yes, indeed. It's not very accurate for an altitude, but given that 
> caveat it has some use. And I mention this in my *Modern Celestial 
> Navigation* classes! The center of the rainbow is identical to the 
> anti-sun spot in the
> sky: opposite in azimuth and negative altitude. And the primary 
> rainbow itself is 42° away from that anti-sun point. As I say, this is 
> only marginally useful as an altitude, but it can be quite useful for 
> a quick visual compass check.
>
> Frank Reed
>
> 
>  6>
>


: 
http://fer3.com/arc/m2.aspx/Position-rainbow-Seltzer-aug-2017-g39752

   

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