Expanding QZSS to the World with LEO Satellites: An Open, Community-Driven Approach

Joshua J. R. Critchley-Marrows, Toshihiro Shibukawa, Nobuhiro Sakamoto, Shogo Matsuo, Masahiro Fujita, Naoko Saka, Tadashi Sasakawa, Kota Kakihara, Tomoaki Yasuda, Masaya Murata, Satoshi Kogure

Abstract:	This paper proposes a LEO-PNT satellite constellation that will bring services of QZSS to a global audience, alongside an emphasis to open approaches for adoption by the user community. A satellite development approach will be proposed that aids in overcoming key technical challenges of a LEO-PNT platform. In addition, scenarios will be treated using real-time GNSS data, augmented by simulated LEO-PNT satellites, highlighting performance errors and convergence times, in a variety of environments.
Published in:	Proceedings of the 38th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025) September 8 - 12, 2025 Hilton Baltimore Inner Harbor Baltimore, Maryland
Pages:	1289 - 1304
Cite this article:	Critchley-Marrows, Joshua J. R., Shibukawa, Toshihiro, Sakamoto, Nobuhiro, Matsuo, Shogo, Fujita, Masahiro, Saka, Naoko, Sasakawa, Tadashi, Kakihara, Kota, Yasuda, Tomoaki, Murata, Masaya, Kogure, Satoshi, "Expanding QZSS to the World with LEO Satellites: An Open, Community-Driven Approach," Proceedings of the 38th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025), Baltimore, Maryland, September 2025, pp. 1289-1304. https://doi.org/10.33012/2025.20411
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