Research on positioning and measuring speed in the high speed SAR system based on high precision map matching

Because the positioning precision of high speed SAR plane using inertia navigation data of low precision directly is very low.A positioning method of high speed SAR plane based on number map after high precision matching is proposed.It chooses some points in the SAR image,acquires their positions in the number map and by some points positions,calculates the instantaneous position of high speed SAR plane.This method improves the positioning precision of high speed SAR plane that can achieve 2~3 m.At the same time,the feasibility of instantaneous speed measure of high speed SAR plane is analyzed.Finally,the simulation analysis confirms the effectiveness of this method.