GEOMETRY ORBIT DETERMINATION OF GEO SATELLITE ATTENDING TO SYSTEMATIC ERRORS
Xu Tianhe 1, 2) ; and He Kaifei 3)
1)School of Geodesy and Geomatics, Wuhan University, Wuhan 4300792)Xi’an Research Institute of Surveying and Mapping, Xi’an 7100543)Chang’an University, Xi’an 710054
Abstract：The basic principle of geometry orbit determination for Geosatinoary Earth Orbit (GEO) satellite is introduced. The mathematical model, parameter estimators and the formula of correlative coefficients between the estimated parameters are derived for geometry orbit determination of GEO satellite with systematic errors. A simulated numerical example is conduced for three types of systematic error, the constant, the linear polynomial, and the quadratic polynomial by using the proposed method. The results show that the influence of systematic errors on the geometry orbit can be efficiently controlled with the new method. There is strong correlativity between the systematic error parameters and X, Y components, and the correlative coefficients change with the variation of PDOP. The correlativity between them and Z component is low. All these result in the precision decrease of X and Y components, and the precision is almost of Z component uninfluenced.
