Research On Sar Image Navigation Position And Speed Measuring Technology

Synthetic Aperture Radar is a voluntary microwave imaging sensor, and it can provide radar image with high resolving power in bad visibility weather. Applying SAR technology to navigation, on the one hand, can provide effectively all-weather and all-day navigation. On the other hand, it can heighten the independence and anti-jamming ability of aircraft navigation in complex environment.In the background of broad research of SAR navigation, this thesis studies the technology of SAR image navigation position and speed measuring, designs the whole project, researches position and speed measuring technology of SAR image navigation, and conducts image sequence navigation position and speed measuring technique research by using real flight image data.The main tasks of this thesis include three sections:1, The project design of SAR image navigation position and speed measuring system which includes principle,flow and whole frame design has been made.2, The SAR image position and speed measuring is researched. The two position measuring methods which are distance intersection and based on azimuth door are implemented. This paper also poses three speed measuring methods which are based on INS correction, angle and distance calculating and doppler parameter combining.3, The image sequence navigation position and speed measuring method is researched. The speed measuring arithmetic by using image sequence is testified by the real visible light/infrared image data. This paper also poses a real situation simulation method and makes kalman filter application research in the field of the image sequence navigation position and speed measuring.