Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Reexamination Certificate
2005-09-13
2005-09-13
Chin, Gary (Department: 3661)
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
C701S213000, C342S357490, C342S358000
Reexamination Certificate
active
06944541
ABSTRACT:
The Fault Detection and Exclusion (FDE) system for use in navigational systems that rely upon multiple ranging signals, such as GPS satellites, uses an FDE algorithm to detect, as soon as possible, whether a fault exists in a signal associated with one or more of the GPS satellites. The system makes this determination by comparing a computed residual error with a first fault detection threshold. After determining that the computed residual error has exceeded the first, relatively low, fault detection threshold, the system transmits a signal to one or more external systems indicating that one or more signals associated with the various GPS satellites may be faulty. The system then monitors horizontal estimated position error (HUL) until this value has met or exceeded a relatively high fault isolation threshold value. The system then attempts to isolate and exclude the faulty satellite from the current navigational solution.
REFERENCES:
patent: 5420594 (1995-05-01), FitzGerald et al.
patent: 5436632 (1995-07-01), Sheynblat
patent: 5600329 (1997-02-01), Brenner
patent: 5663732 (1997-09-01), Stangeland et al.
patent: 5702070 (1997-12-01), Waid
patent: 5760737 (1998-06-01), Brenner
patent: 5808581 (1998-09-01), Braisted et al.
patent: 5841399 (1998-11-01), Yu
patent: 5969670 (1999-10-01), Kalafus et al.
patent: 5969672 (1999-10-01), Brenner
patent: 6114988 (2000-09-01), Schipper et al.
patent: 6134484 (2000-10-01), Geier et al.
patent: 6166683 (2000-12-01), Hwang
patent: 6204806 (2001-03-01), Hoech
patent: 6205377 (2001-03-01), Lupash et al.
patent: 6311127 (2001-10-01), Stratton et al.
patent: 6345232 (2002-02-01), Lynch et al.
patent: 6486831 (2002-11-01), Martorana et al.
patent: 6856905 (2005-02-01), Pasturel et al.
Ormand, D.;Wide Area Augmentation System(WAAS); 31stAnnual Precise Time and Time Interval (PTTI) meeting; Dec. 7-9, 1999, pps. 155-160.
Walter, T. et al.,Flight Trials of the Wide-Area Augmentation System(WAAS); Stanford University, Sep. 23, 1994.
Pasturel Patrice Knut
Rose Robert C.
Chin Gary
Garmin AT, Inc.
Rolf Devon A.
LandOfFree
Systems and methods for fault detection and exclusion in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for fault detection and exclusion in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for fault detection and exclusion in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3446121