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    Re: Position by rainbow?
    From: Frank Reed
    Date: 2017 Aug 13, 22:51 -0700

    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

       
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