The emerging BeiDou navigation satellite system has contributed to global precise positioning and has recently moved toward space-borne applications. However. the contribution of BeiDou on LEO orbit determination applications is limited by the poor precision of the GEO satellite orbit and clock products. Current researches suggest that BeiDou GEO satellites should not be included in L... https://www.markbroyard.com/mega-sale-unmitigated-gall-online-sale-special-save/