A positioning satellite designed to follow an orbit that keeps it near the zenith of a specific region for extended periods. By combining quasi-zenith satellites with standard GPS, higher positioning accuracy can be achieved in urban canyons and narrow alleys where GPS signals are obstructed. Japan's Michibiki satellite system is a well-known example of this technology.

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• 2024r06 #99GPS の電波を捕捉しにくいビルの谷間や狭い路地などでも位置を計測することができるように、特定の地域の上空に比較的長く留まる軌道をとり、GPS と併用することに…