EntityQ189617· pop 8· linked from 8 articleszenith cameraSign in to saveastronomic or geodetic instrument which is directed exactly to the zenithConnectionsgeodetic astronomyEntitylatitudeEntitylongitudeEntityGlobal Positioning SystemEntitydigital object identifierEntitygeoidEntitysurveyingEntityplumblineEntitycharge-coupled deviceEntitygravity of EarthEntityZenitEntityInternational Earth Rotation and Reference Systems ServiceEntityZenith telescopeEntityThe Tycho-2 catalogue of the 2.5 million brightest starsEntityvertical deflectionEntityGeodetic coordinatesEntityCategoriesAstrometryCameras by typeGeodesyObservational astronomy