Pseudolite
A pseudolite ( English pseudolite , suitcase word from the Greek pseudo "false, pretended" and satellite ) is a terrestrial transmitter that sends out signals that imitate those of a satellite .
Pseudolites are set up, for example, to locally check the measurement accuracy of satellite-based navigation systems, such as B. GPS to increase. For a GPS receiver, pseudolites appear as additional satellites.
The legal position of the broadcasting operation is unclear, because pseudolites transmit on frequencies that are actually reserved for satellites according to the specifications of the ITU .
Pseudolites are also used to broadcast signals for satellite radio in cities. Otherwise reception would not be possible in deep canyons between high-rise buildings. The term ancillary terrestrial components (ATC) has become established for ground segment networks in America and Complementary Ground Component (CGC) in Europe .
See also
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- Edward Alan Lemaster: GPS Pseudolite Signal Design. Stanford University, September 1994 (English)
- Jonathan M. Stone, et al. (1999): "GPS Pseudolite Transceivers and their Applications", Stanford University, Presented on ION National Technical Meeting 99, San Diego, California (English)