Original ResearchPublished 5 October 2026Elevation-cutoff-dependent convergence and steady-state performance of LEO-augmented multi-GNSS PPP time transferTianpei Liu · Daqian Lyu · Pulong Nan · Jian Lyu · Xinyun Cao · Mengqi Qiang · Zhouji Wang · Fei Shen · Caoming Fan · Yifei ZhaoFrontiers in Astronomy and Space Sciencesdoi 10.3389/fspas.2026.1969705
Original ResearchPublished 24 September 2026A multi-tier PPP-RTK positioning method based on correction-product availabilityYuhang Hu · Fang Cheng · Pengli Shen · Xin Gao · Wenshuo Sun · Zhe Hui · Xiaochun LuFrontiers in Astronomy and Space Sciencesdoi 10.3389/fspas.2026.1973781
Original ResearchPublished 23 September 2026Adaptive clock modeling for real-time GPS/Galileo PPP timing of LEO satellitesShiyu Yu · Guanqi Liu · Tianpei Liu · Xinyun Cao · Guangjie Luo · Qiwei Chen · Fei Shen · Dong ZhangFrontiers in Astronomy and Space Sciencesdoi 10.3389/fspas.2026.1967277
