Survey on Fault-Tolerant Navigation

Positioning accuracy, availability and reliability of GPS are dependent on the numbers of visible satellites and geometry structure of satellite constellations. But in poor conditions, it is difficult to satisfy the needs of the precision positioning. In order to improve the validity of the GPS receiver in signal masking occasions, a lot of researchers have proposed a variety of methods. In this paper, the author will analyze the current research status and method of fault-tolerant navigation. Finally, research foreground of fault-tolerant navigation is expected briefly.