noun
quasi-zenith satellite
A satellite in a quasi-zenith orbit, used for regional navigation and augmentation systems. Technical term in aerospace and satellite navigation.
日本は準天頂衛星システム「みちびき」を運用している。
Japan operates the quasi-zenith satellite system 'Michibiki'.
A geostationary satellite orbits directly above the equator, while a quasi-zenith satellite has an inclined orbit that passes near the zenith over a specific region.
Compound of 準 (quasi-), 天頂 (zenith), and 衛星 (satellite). A modern technical term.