Abstract: The new generation of China geostationary meteorological satellites, FY4, includes optical and microwave sounding satellites, will present the status of multiple satellites in orbit at the same time. Ranging, orbit determination and prediction (called orbit determination) are the supporting systems of satellite image navigation, attitude maneuver and orbit management, which are characterized by high accuracy and fast response. In view of the problems and limitations of the ground orbit determination system under development, as well as the accuracy and timeliness of the geostationary meteorological satellite orbit determination using GNSS (global navigation satellite system), simulations are carried out, and the parameters such as the number of satellites that BDS(BeiDou navigation system), GPS(global position system)and their combination can continuously receive simultaneously, and positioning accuracy are obtained. The analysis shows that the GNSS orbit determination meets the development requirements of the new generation of geostationary meteorological satellites.

Key words: geostationary meteorological satellite, ranging;orbit determination, global navigation satellite system