REAL-TIME FLIGHT TESTING USING INTEGRITY BEACONS FOR GPS CATEGORY III PRECISION LANDING

Clark E. Cohen, Boris S. Pervan, David G. Lawrence, H. Stewart Cobb, J. David Powell, and Bradford W. Parkinson

Peer Reviewed

Abstract:	A new system based on GPS Integrity Beacons (low-power pseudolite marker beacon transmitters situated underneath the approach path) has been developed to provide the highest possible performance (including accuracy, integrity, and availability) for Category III precision landing using the Global Navigation Satellite System (GNSS). The landing system based on Integrity Beacons defines the Kinematic GNSS Landing System (KGLS). Two new developments are reported: first, real-time, centimeter-level kinematic satellite positioning using the integrity beacon is evaluated in flight testing, and second, a new paradigm for real-time differential satellite positioning is introduced that eliminates the traditional data link. A special type of Integrity Beacon is the Omni Marker, which rebroadcasts each received satellite signal coherently using a new PRN code. An aircraft receiving both the direct signal and the rebroadcast is capable of differential ranging without a digital data link. The latency associated with traditional differential positioning is completely eliminated.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 41, Number 2
Pages:	145 - 158
Cite this article:	Cohen, Clark E., Pervan, Boris S., Lawrence, David G., Cobb, H. Stewart, Powell, J. David, Parkinson, Bradford W., "REAL-TIME FLIGHT TESTING USING INTEGRITY BEACONS FOR GPS CATEGORY III PRECISION LANDING", NAVIGATION: Journal of The Institute of Navigation, Vol. 41, No. 2, Summer 1994, pp. 145-158.
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