A graphical representation of approaches to references for position, navigation and timing
We consider approaches to position, navigation and timing references to fall into 3 categories:
  • Direct navigation sources that determine position relative to reference points.
  • Signals of opportunities that be from any transmission source that are not designed for navigation but can be useful for determining range or bearing.
  • Other approaches that can be helpful for autonomous navigation to improve reliability and minimize the risk of spoofing
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Date: 
Saturday, September 26, 2015
Document Type: