NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Long-range airplane navigation
From: Charles Seitz
Date: 2004 Dec 2, 10:45 -0500
From: Charles Seitz
Date: 2004 Dec 2, 10:45 -0500
I have seen references to daytime star sightings by the Astrotracker system that was used to navigate the SR-71 'spyplane'. Apparently, the system was completely automatic and the starlight was detected by a photomultiplier tube. No visual observations were required. I also recall references to a different scale for measuring the brightness of the stars because the spectral sensitiviy of the auto-tracker sensor is different then that of the human eye. --- CHAS ----- Original Message ----- From: "Fred Hebard"To: Sent: Thursday, December 02, 2004 08 57 Subject: Re: Long-range airplane navigation >I was asked an interesting question, which was: could star shots be > made during the day with a bubble sextant? The intent would be to get > more than one line of position during one round of shooting.