Research On Kinematic To Kinematic Positioning Based On BeiDou Satellite Navigation System

Since the third generation of Beidou system has been completed,researches about satellite navigation has become more and more popular.Nowadays,the Beidou system has many applications in different industry fields,such as transportation,agriculture,forestry,fisheries,and electric power.Kinematic to kinematic positioning technology has great prospects for use,such as unmanned aircraft formation,ship navigation,etc.The traditional differential positioning can effectively improve the positioning accuracy,but it does not meet the positioning requirements well in many positioning scenarios without reference station coverage.Therefore,this paper investigates an improved differential algorithm to improve the positioning accuracy of a single station,in addition to the mathematical model of dynamic positioning,and designs several experiments to verify the comparison.The main research of this paper includes:1.traditional differential positioning requires that the reference station is fixed and the position coordinates are precisely known,but in some environments the reference station cannot be covered and the traditional differential positioning cannot meet the positioning requirements well.Considering that the principle of differential positioning is to eliminate some errors related to the geometric position height by the known information of the reference station,and broadcast the error corrections to the nearby mobile stations,these errors can be regarded as constant between two ephemerides,so the differential method between ephemerides can be used to eliminate these errors.In order to improve the accuracy of mobile stations’ location without relying on the reference station.The experimental results show that the epoch difference can effectively improve the accuracy with just one single station.2.The purpose of dynamic positioning is to solve the position relationship between the mobile base station and the mobile station,i.e.,the baseline vector between the two stations.To achieve dynamic positioning,we first need to obtain the absolute position of the mobile base station,which can be achieved by such means as pseudo-range single-point positioning,and then use the position coordinate correction number or the baseline vector correction number to solve the baseline between the mobile base station and the mobile base station.In this paper,dynamic positioning experiments are carried out under different motion routes,and the baseline is compared with that of single-point positioning,and the experimental results show that the dynamic positioning method has higher accuracy in solving the baseline.