準じゅん天てん頂ちょう衛えい星せいシステム

noun

quasi-zenith satellite system; QZSS

Technical term for a Japanese satellite navigation system that augments GPS, with satellites in quasi-zenith orbits to improve coverage in urban and mountainous areas.

• 準じゅん天てん頂ちょう衛えい星せいシステムは、GPSの精せい度どを高たかめるために開かい発はつされた。

  The quasi-zenith satellite system was developed to improve GPS accuracy.