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observable-specific phase biases of Wuhan multi-GNSS experiment analysis center’s rapid satellite products

Satellite Navigation 2022年第3期3卷 91-105,I0003页

作者： Jianghui Geng Qiyuan Zhang Guangcai Li Jingnan Liu Donglie Liu GNSS Research Center Wuhan University129 Luoyu RoadWuhan430079China Hubei Luojia Laboratory Wuhan University129 Luoyu RoadWuhan430079China Natural Resources Satellite Remote Sensing Application Center 242 Zhonghuabei RoadGuiyang550004China

Precise Point Positioning(PPP)with Ambiguity Resolution(AR)is an important high-precision positioning technique that is gaining popularity in geodetic and geophysical *** implementation of PPP-AR requires precise products such as orbits,clocks,code,and phase *** one of the analysis centers of the International Global Navigation Satellite System(GNSS)Service(IGS),the Wuhan University Multi-GNSS experiment(WUM)Analysis Center(AC)has provided multi-GNSS observable-specific bias(OSB)products with the associated orbit and clock *** this article,we first introduce the models and generation strategies of WUM rapid phase clock/bias products and orbit-related products(with a latency of less than 16 h).Then,we assess the performance of these products by comparing them with those of other ACs and by testing the PPP-AR positioning precision,using data from Day of the Year(DOY)047 to DOY 078 in *** is found that the peak-to-peak value of phase OSBs is within 2 ns,and their fluctuations are caused by the clock day boundary *** associated Global Positioning System(GPS)orbits have the best consistency with European Space Agency(ESA)products,and those of other systems rank in the medium *** NAvigation Satellite System(GLONASS)clocks show slightly inconsistency with other ACs’due to the antenna thrust power adopted,while the phase clocks of other GNSSs show no distortion compared with legacy *** well-estimated phase products for Precise Orbit Determination(POD),the intrinsic precision is improved by 14%,17%,and 24%for GPS,Galileo navigation satellite system(Galileo),and BeiDou-3 Navigation Satellite System(BDS-3),*** root mean square of PPP-AR using our products in static mode with respect to IGS weekly solutions can reach 0.16 cm,0.16 cm,and 0.44 cm in the east,north,and up directions,*** multi-GNSS wide-lane ambiguity fixing rates are all above 90%,while the narrow-lane fixing rates above 80%.

关键词： Multi global navigation satellite system observable-specific phase bias Precise point positioning with ambiguity resolution Wuhan University multi-GNSS experiment analysis center Precise orbit determination

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