CHIPADE, Radhika A., and Thekke Variyam RAMANATHAN. 2021. “Extended Kalman Filter Based Statistical Orbit Determination for Geostationary and Geosynchronous Satellite Orbits in BeiDou Constellation”. Contributions to Geophysics and Geodesy 51 (1), 25-46. https://doi.org/10.31577/congeo.2021.51.1.2.