| With the official operation of the BeiDou Navigation Satellite System(BDS)and the rapid development of BDS precision positioning services,the high-precision Bei Dou navigation satellite orbit is the basis of related industrial applications,so it is necessary to determine the precise orbit of the BDS satellite.This paper is based on the ECOMC empirical new optical pressure model,using BDS-2/3 GEO,IGSO,MEO three types of satellites after two years of precision ephemeris for orbit integration and orbit fitting,to obtain the numerical value of each satellite parameter Analyze the periodic characteristics of various parameters,refine the solar radiation pressure perturbation model of BDS-2/3 satellites,conduct precise orbit determination studies on the three types of BDS-2/3 satellites,and finally use the precision of BDS-2/3Orbit for precise relative positioning experimental research.The main research contents of this paper are as follows:(1)Overview of the construction and development of Bei Dou satellite navigation system,a more comprehensive description of the main perturbation forces and corresponding perturbation forces that affect the accuracy of BDS-2/3 satellite orbit determination,and analysis of the solar radiation pressure at home and abroad Current status of modeling research.(2)In view of the solar radiation pressure ingestion received by the satellite,the modeling methods of the current three types of light pressure models are summarized in detail,and the advantages,disadvantages and applicability of various light pressure models are analyzed.It provides a certain theoretical basis and scientific basis for the application of BDS satellite precise orbit determination.(3)Perform data quality analysis and control on the four-system observation data received by the globally distributed MGEX and iGMAS tracking stations,which weakens the influence of the original observation data quality on orbit determination and positioning calculation,and provides the BDS-2/3 satellite positioning,it also provides a certain reference for the selection of ground tracking stations in the study of BDS-2/3 satellite orbit determination and positioning.(4)A systematic overview of a series of ECOM light pressure models released by CODE,and a detailed description of the method of establishing ECOMC new empirical light pressure models.And use the ECOMC solar radiation pressure model to perform orbit integration and orbit fitting of the three orbital satellites of BDS-2/3GEO,IGSO and MEO,obtain the two-year time series of each parameter of the light pressure model,and analyze the periodic characteristics and changes of its parameters At the same time,the Fourier polynomial functions of different orders are used to perform numerical fitting on each parameter,which is convenient for the study of the prediction of each parameter of the model.(5)The basic principles of BDS-2/3 satellite precise orbit determination are studied,and the data quality control of ground reference stations is carried out.Some of the better quality tracking stations are selected for BDS-2/3 precise orbit determination.The research is different.The influence of ECOM optical solar radiation pressure model parameters on the precision orbit determination of the BDS-2/3 hybrid constellation is analyzed,and the influence of each optical pressure model on the accuracy of orbit overlapping arcs,the accuracy of orbit RAC three directions and the accuracy of URE are analyzed.And according to the experimental results,the corresponding conclusions are drawn on the parameter selection strategy of the BDS satellite optical pressure model of different types of orbits.(6)Use the BDS-2/3 precision orbit products for precise relative positioning application research,and use the GPS,single BDS-2 and single BDS-3 solution results as a reference to analyze its solution quality and accuracy. |
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