卫星的轨道精密定轨是地球探测卫星顺利执行的关键。近年来迅速发展起来的GNSS技术具有可视性较好的特点,可对低轨卫星实现连续、高精度的跟踪观测,这为卫星的精密定轨提供了技术保证。为了确定GRACE-A卫星的精密轨道,我们采用非差相位...卫星的轨道精密定轨是地球探测卫星顺利执行的关键。近年来迅速发展起来的GNSS技术具有可视性较好的特点,可对低轨卫星实现连续、高精度的跟踪观测,这为卫星的精密定轨提供了技术保证。为了确定GRACE-A卫星的精密轨道,我们采用非差相位数据,给出了GRACE-A的几何轨道,并将解算的结果与GFZ发布的科学轨道进行比对。结果表明:解算出的7 d GRACE-A卫星几何轨道三维位置精度优于3 cm。展开更多
Spaceborne global navigation satellite system(GNSS)has significantly revolutionized the development of autonomous orbit determination techniques for low Earth orbit satellites for decades.Using a state-of-the-art comb...Spaceborne global navigation satellite system(GNSS)has significantly revolutionized the development of autonomous orbit determination techniques for low Earth orbit satellites for decades.Using a state-of-the-art combination of GNSS observations and satellite dynamics,the absolute orbit determination for a single satellite reached a precision of 1 cm.Relative orbit determination(i.e.,precise baseline determination)for the dual satellites reached a precision of 1 mm.This paper reviews the recent advancements in GNSS products,observation processing,satellite gravitational and non-gravitational force modeling,and precise orbit determination methods.These key aspects have increased the precision of the orbit determination to fulfill the requirements of various scientific objectives.Finally,recommendations are made to further investigate multi-GNSS combinations,satellite high-fidelity geometric models,geometric offset calibration,and comprehensive orbit determination strategies for satellite constellations.展开更多
文摘卫星的轨道精密定轨是地球探测卫星顺利执行的关键。近年来迅速发展起来的GNSS技术具有可视性较好的特点,可对低轨卫星实现连续、高精度的跟踪观测,这为卫星的精密定轨提供了技术保证。为了确定GRACE-A卫星的精密轨道,我们采用非差相位数据,给出了GRACE-A的几何轨道,并将解算的结果与GFZ发布的科学轨道进行比对。结果表明:解算出的7 d GRACE-A卫星几何轨道三维位置精度优于3 cm。
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDA30010000 and XDA30010300).
文摘Spaceborne global navigation satellite system(GNSS)has significantly revolutionized the development of autonomous orbit determination techniques for low Earth orbit satellites for decades.Using a state-of-the-art combination of GNSS observations and satellite dynamics,the absolute orbit determination for a single satellite reached a precision of 1 cm.Relative orbit determination(i.e.,precise baseline determination)for the dual satellites reached a precision of 1 mm.This paper reviews the recent advancements in GNSS products,observation processing,satellite gravitational and non-gravitational force modeling,and precise orbit determination methods.These key aspects have increased the precision of the orbit determination to fulfill the requirements of various scientific objectives.Finally,recommendations are made to further investigate multi-GNSS combinations,satellite high-fidelity geometric models,geometric offset calibration,and comprehensive orbit determination strategies for satellite constellations.