Patent ID: 8260552
Filing Date: 2012-09-04
Classification: G01S

Abstract:
1. A method for determining a real time location of an aircraft, comprising: receiving inertial navigation system information and global navigation satellite system GNSS information with a real time Kalman filter; determining the real time location of the aircraft with the real time Kalman filter based upon the inertial navigation system information and the GNSS information; delaying the GNSS information by an interval; receiving the undelayed inertial navigation system information and the delayed GNSS information with a delay Kalman filter; determining a predictive location of the aircraft with the delay Kalman filter based upon the inertial navigation system information, the delayed GNSS information, and the interval while determining the real time location with the real time Kalman filter; and in response to an inaccuracy of the real time location determined from the real time Kalman filter, selecting the predictive location determined from the delay Kalman filter as a new real time location of the aircraft.