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Article
Open AccessDemand and key technology for a LEO constellation as augmentation of satellite navigation systems
A Low Earth Orbit (LEO) constellation augmenting satellite navigation is important in the future development of Global Navigation Satellite System (GNSS). GNSS augmented by LEO constellations can improve not o...
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Article
Open AccessUncombined precise orbit and clock determination of GPS and BDS-3
There is increasing concern about the uncombined (UC) observation model in the field of global navigation satellite system (GNSS). Based on the global positioning system (GPS) and the third-generation BeiDou n...
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Article
Open AccessOrbit determination and time synchronization for BDS-3 satellites with raw inter-satellite link ranging observations
To provide competitive global positioning and timing services under the condition that monitoring stations are confined to Chinese territory, inter-satellite link (ISL) technology is used by the third-generati...