supported by the National Natural Science Foundation of China (Grant No.61039003);the Aeronautical Science Foundation of China (Grant Nos.20090818004 and 20100851018);the National Key Laboratory Foundation
When the initial position error or the altimeter measurement noise is large,the BUAA Inertial Terrain-Aided Navigation (BITAN) algorithm based on extended Kalman filtering can not be located accurately.To solve this p...