PPRuNe Forums - View Single Post - SR71 Astral Navigation ?
Thread: SR71 Astral Navigation ?
View Single Post
Old 3rd Oct 2003, 20:56
  #9 (permalink)  
avioniker
 
Join Date: May 2002
Location: USA
Age: 73
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
The GPS takes the four strongest signals. At altitudes above 70K it may be confused by having six or more with equal strength and two or more may be very low on the horizon. The system gets what it sees as an impossible solution.
avioniker is offline