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1
QZSS-1 (Michibiki-1), launched by JAXA in 2010, was Japan's first Quasi-Zenith Satellite System spacecraft, designed to augment GPS signals over Japan and the Asia-Oceania region from a quasi-zenith orbit.
8.00
Great
Why this score
Pioneering Japanese QZSS satellite improving urban and mountainous GPS availability, strong regional navigation importance.
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2
QZSS-2 (Michibiki-2), launched by Japan in 2017, was the second satellite in the Quasi-Zenith Satellite System, helping establish the four-satellite constellation that began providing Japan with near-continuous domestic coverage.
7.85
Good
Why this score
Key QZSS constellation builder with reliable augmentation role, valuable regionally but less historic than Michibiki-1.
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