Autonomous navigation error correction
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United States of America Patent
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N/A
Issued Date -
Sep 30, 2004
app pub date -
Mar 25, 2003
filing date -
Mar 25, 2003
priority date (Note) -
Abandoned
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Abstract
A method and system for continuously monitoring a constellation of Global Positioning System (GPS) satellites from space is disclosed. The system utilizes a plurality of GPS receivers respectivelyinstalled on-board the GPS satellites. The on-board GPS receivers receive the navigation signals transmitted by its host GPS satellite in addition to the navigation signals from all of the GPS satellites in view. The system further utilizes a Kalman filter which can also be installed on-board one or more of the GPS satellites in space to achieve further isolation from the master control station. The method comprises the steps of providing a plurality of GPS receivers on-board the GPS satellites and substantially continuously receiving at the GPS receivers navigation signals from the GPS satellites in view of the GPS receivers, and continuously determining a range from the navigation signal of each GPS satellite in view of the GPS receivers.
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