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A comment on Seeing stars again: Naval Academy reinstates celestial navigation. Parent comment

Re:Seeing stars again: Naval Academy reinstates celestial na... by dagw on Wednesday October 14, 2015 @06:17AM (#10385831)
It's an idea that has been around for awhile: http://www.ri.cmu.edu/pub_files/pub2/cozman_fabio_1995_1/coz... is just one of dozens of papers covering the idea.

There even appears to be a patent on the idea: https://www.google.com/patents/US7706917

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Re:Seeing stars again: Naval Academy reinstates celestial na... by Ao7bei3s on Wednesday October 14, 2015 @06:44AM (#10385899)
It has actually been done: the SR-71 Blackbird had one.

https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Astro...

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Re:Seeing stars again: Naval Academy reinstates celestial na... by mikeash on Wednesday October 14, 2015 @09:50AM (#10386571)
Amazingly, it worked during the day (on the ground) too!
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Re:Seeing stars again: Naval Academy reinstates celestial na... by mxfh on Wednesday October 14, 2015 @07:27AM (#10386000)
The patent mentioned only covers projecting a light pattern to the ceiling of a room for indoor-navigation of household robots.
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Re:Seeing stars again: Naval Academy reinstates celestial na... by dagw on Wednesday October 14, 2015 @07:32AM (#10386007)
My mistake. I guess I should know better than to only read the title of a patent.
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