A terrain-aided navigation apparatus using a multi-look angle radar altimeter

摘要

The terrain reference navigation apparatus using the multi-angle radio wave altimeter according to the present invention includes three first, second, third, and fourth antennas, which are alternately connected to 32 first, ., 32 antennas 31-1, 3 receivers (33-1, 33-2, 33-3), and the point target and the cross track angle ^aAnd the terrain point ground angle ^cA multi-angle propagation altimeter 30 for outputting point target altitude data, and a 3D geomorphic data of point target altitude data, and then obtaining a 2D terrain shape by an FFT (Fast Fourier Transform) (Inertial Navigation System) 20 for obtaining the altitude, thereby greatly reducing the number of receivers of the interferometer SAR altimeter commonly used for the navigation of the air vehicle 1, and particularly using the FFT for signal processing,