Experimental Study of an Orbital Filter in Hybrid Lunar Navigation with Ground-Based Clock Synchronization

Shingo Nishimoto, Junichiro Kawaguchi

Peer Reviewed

Abstract:	The authors previously proposed a hybrid navigation scheme that combines GNSS and asynchronous one-way range (AOWR) measurements to address the GNSS geometric limitation in cislunar space. This study investigates the orbit determination performance of the proposed hybrid navigation method using the extended Kalman filter (EKF). The approach enables real-time, accurate positioning and achieves practical positioning accuracy within a short time through clock synchronization. Hardware-in-the-loop simulations using a software-defined radio demonstrate that the hybrid navigation method achieves position accuracy better than 10 m using pseudo-range observation without requiring a highly stable clock onboard.
Published in:	Proceedings of the 2026 International Technical Meeting of The Institute of Navigation January 26 - 29, 2026 Hyatt Regency Orange County Anaheim, California
Pages:	699 - 710
Cite this article:	Nishimoto, Shingo, Kawaguchi, Junichiro, "Experimental Study of an Orbital Filter in Hybrid Lunar Navigation with Ground-Based Clock Synchronization," Proceedings of the 2026 International Technical Meeting of The Institute of Navigation, Anaheim, California, January 2026, pp. 699-710. https://doi.org/10.33012/2026.20510
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