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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude by Orion ...in Spaaaace!
From: Joshua Carty
Date: 2026 Aug 22, 16:04 -0700
From: Joshua Carty
Date: 2026 Aug 22, 16:04 -0700
Sorry for not getting back to this.
In my last message, I wondered about dip up there in orbit. My dip tables don't go as high as 250 miles!! It now seems to me now that the hardest problem for an orbiting observer is figuring where the horizon is in the first place. In those photos from the Space Station, there's just a fuzzy BLUR for the horizon. Also, different from the case near sea level, the light from the horizon to the observer mostly goes in a straight line through vacuum, no refraction in the dip. So that means the sea level dip math would not be useful. What should we do?
Josh
