Beacon for satellite registration
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United States of America Patent
Stats
-
Aug 12, 2003
Grant Date -
N/A
app pub date -
Mar 22, 2001
filing date -
Mar 22, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is a system for providing GPS users with a high level of confidence in the integrity and accuracy of received GPS signals. A beacon is located at a fixed point on the earth at a known location. The beacon emits a coded signal pulse having a precise RF waveform that is received by all GPS satellites in view of the beacon's location. The RF signal pulse is decoded and processed onboard each GPS satellite. The GPS satellite receives beacon position data from the other in-view GPS satellites via crosslinks. The GPS satellite compares the beacon position data with satellite position data such as Autonav data and thereby verifies the integrity of its own operation. The GPS satellite then sends an integrity message to GPS users to inform the GPS users of the integrity of received GPS signals from that satellite.
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