Ultra-tightly coupled GPS and inertial navigation system for...

Details Ultra-tightly coupled GPS and inertial navigation system for... Ultra-tightly coupled GPS and inertial navigation system for...

2005-11-23

2009-08-25

Issing, Gregory C (Department: 3662)

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

Directive

Including a satellite

C701S216000

Reexamination Certificate

active

07579984

ABSTRACT:
An Ultra-Tightly Coupled GPS-inertial navigation system for use in a moving agile platform includes a range residual extractor that uses best curve fitting of a third order polynomial for estimating range residual. The curve-fitted residual is used to update an error Kalman filter. The error Kalman filter includes correction for navigation solution, and IMU and GPS parameters. The navigation solution together with GPS parameter corrections are used in a Tracking Predictor to generate high-sampling-rate carrier and code replicas. The curve-fitting error covariance indicates signal to noise ratio for the tracked GPS signal and may be used for early indication of interference or jamming.

REFERENCES:
patent: 6445756 (2002-09-01), Takahashi
patent: 6516021 (2003-02-01), Abbott et al.
patent: 6731672 (2004-05-01), Eschenbach
patent: 7154937 (2006-12-01), Gilmour et al.
patent: 2005/0147191 (2005-07-01), Geier et al.

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