Doppler Positioning of Dynamic Targets with Unknown LEO Satellite Signals

A new concept of global navigation based on Doppler measurements from a large low Earth orbit (LEO) constellation is investigated that has potential to serve as complement or backup satellite systems (GNSSs) provide and positioning services in GNSS denial environments. In this work, we investigate the LEO communication opportunity signals dynamic navigation, establish equations, derive main error sources affecting results target, analyze impact each source accuracy through simulation. The show clock drift had accuracy. This scheme would be more competitive if it could high-precision orbits accurate measurements. obtained used are an attractive alternative rejection environments for high targets.