Inexpensive monitoring technique for achieving high level integr

Details Inexpensive monitoring technique for achieving high level integr Inexpensive monitoring technique for achieving high level integr

1998-01-22

1999-10-19

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

244183, H04B 7185

Patent

active

059696702

ABSTRACT:
A dual global positioning system (GPS) receiver navigation system. The system of the present invention includes a primary GPS receiver adapted to determine a first position. The primary GPS receiver is certified to a first integrity level and is further adapted to provide GPS navigation data to an external device. The system of the present invention also includes a secondary GPS receiver coupled to the primary GPS receiver. The secondary GPS receiver is certified to a second integrity level having less stringent requirements than the first integrity level. The secondary GPS receiver is adapted to determine a second position and monitor the primary GPS receiver to detect a fault condition by comparing the first position and the second position, such that the GPS navigation data is provided in accordance with the first certification level regardless of the second integrity level of the secondary GPS receiver.

REFERENCES:
patent: 5663732 (1997-09-01), Stangeland
patent: 5702070 (1997-12-01), Waid

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