Integration Of Space And Ground Data And Satellite-ground Information Visualization Of Bei Dou Satellite Navigation System

As a satellite navigation system independently developed and constructed by China,the BeiDou Navigation Satellite System,is still under construction.Its complex constellation structure and the dynamic interaction of space-time information between the stars and the ground have made domain experts integrate the measurement,operation and control of the system and daily business management have brought great challenges and higher requirements,and it has also increased the difficulty for the public to know and understand the BeiDou satellite navigation system.At present,for the simulation of BeiDou satellite navigation system,the common practice is to conduct secondary development on the basis of professional software such as ArcGIS and STK.Higher,less audience.In addition,the BeiDou satellite navigation simulation and visualization system in the Web environment requires the installation of various plug-ins,and mainly simulates and analyzes the space segment.It does not involve the ground segment and the complex dynamic time-varying star-ground information of the space segment and the ground segment.It also lacks more professional functions such as satellite orbit determination,orbit prediction,monitoring and control station tracking prediction,and inter-satellite links.Therefore,it is of great significance to adopt a web-based approach to integrate the information management of the space and ground segments of the BeiDou navigation system and the visualization of satellite-ground information.This thesis focuses on the integration of space and ground segment data of BeiDou satellite navigation system and the visualization of satellite-ground information.This system uses CesiumJS as the virtual earth platform,calculates the relevant information of BeiDou navigation satellites using the TLE / SGP4 model,and stores the calculation results in the CZML file format,realizing the dynamic visualization of 2D and 3D BeiDou navigation satellites;using Web Service to transform the professional analysis of aerospace module,integrated navigation satellite orbit determination,orbit forecast,ground station tracking forecast,inter-satellite link and other functions,from the space segment and the ground segment for data integration and visual simulation of satellite-to-ground information.This system fully reflects the relationship between BeiDou navigation satellites and ground measurement and control stations,and integrates information management and visualization of measurement and control stations,navigation satellite orbit determination,navigation satellite orbit prediction,and measurement and control station tracking prediction and other functions.Users can access this system on any networked browser that supports WebGL rendering technology to enhance their understanding of BeiDou satellite navigation system and improve the efficiency of analysis and communication.