CHIPADE RA, RAMANATHAN TV. Extended Kalman filter based statistical orbit determination for geostationary and geosynchronous satellite orbits in BeiDou constellation. Contrib. Geophys. Geod. [Internet]. 2021Mar.15 [cited 2024Apr.18];51(1):25-6. Available from: https://journal.geo.sav.sk/cgg/article/view/257