The Study On The Time Difference Of The Radar Based On The Network Of The Near-space

Passive TDOA positioning technology is a positioning accuracy method,and it is the research direction and goal of people to use the measurement radar signal to locate the target.Most of the time difference localization research is based on the ground fixed receiving station to locate the target signal.But sometimes there are some measurement blind spots,such as large areas along the coast of China,that make it impossible for us to fully detect certain regions.In particular,there have been frequent maritime disputes in recent years,such as the south China sea issue.Based on the above problems,this paper makes a research and analysis on the time difference location technology of the target.This paper first analyzes the environmental characteristics and meteorological conditions of Near-space,and defines the positioning system applied by the benchmark,time and space for the next aerostats network scheme design to provide the reference.Secondly,Taylor expansion method and Chan algorithm are introduced in this paper.Based on the Chan algorithm,a certain improvement is made,which reduces the computation of the algorithm and improves the positioning accuracy.And through the GDOP of positioning accuracy is analyzed,several kinds of factors affecting the positioning accuracy of the simulation analysis,these factors mainly include aerostats network configurations,spacing,height,site and time difference measurement errors,etc.The target tracking is studied again.The kinematics model of maneuvering target is analyzed,the movement of the target is modeled,and the target is tracked and simulated by CKF filtering and SRCIKF filtering.In the end,the design scheme of the floatation device is studied,and the realization of the height of the float is analyzed.By aerostats networking space of adjacent to the time difference between target positioning research,as well as in the tracking filtering algorithm is introduced in this article SRCIKF filter to reduce the computational complexity,better efficiency,improve the tracking precision.It is hoped that this paper will have some scientific research value in future engineering application research,which will provide theoretical reference for the application of jet lag in the modern military warfare.At the same time,it also provides some reference significance for the research and analysis of the adjacent space and the simplified tracking algorithm.