Abstract：To satisfy the construction of China RealTime Precise Positioning Service System, a method of orbit determination of navigation satellite based on priori orbit dynamic information was proposed,in which the foregone dynamic orbit information and regional stations’ measurement information are used together. The key techonique is how to assign weight to two above informations. Mathematic model of this method was introduced and transformation formulae of normal equations with initial orbit parameters at different time were given. The cases that China regional orbit determination based on both IGS Final and IGS Rapid orbit dynamic information were computed. At last regional orbit determination accuracy based on dynamic information with different weighting values was analyzed. Experiment proved that this method was feasible and can obtain encourage results.
