Abstract:

High frequency surface wave radar lacks the ability to make a narrow beam in elevation, it cannot estimate the target altitude directly, and the initial state influences the tracking accuracy. A method is proposed to track three dimensional information by adopting height parameterized iterated extended Kalman filter(HPIEKF) combined with a quasi-Newton method. First, a flight altitude of the aircraft is estimated by the former and the present measurements. Second, HPIEKF is initialized with the altitude to track the three dimensional information. Simulation results demonstrate that the quasiNewton method can estimate the flight altitude with small variance, the HPIEKF initialized by that altitude improves the accuracy of altitude estimation.