Short for pseudosatellite, a pseudolite is a ground-based differential GPS transmitter simulating the signal of a real GPS satellite, used for precise ranging applications like aircraft autolanding systems.

To reduce interference to signals from GPS satellites, the pseudolite signal is transmitted only 1/11th of each millisecond, and thus interferes only 10% of the time. The interfering position is changed each millisecond. Signal range is usually around 50 km, requiring about 30 milliwatts of power.

Log in or registerto write something here or to contact authors.