diagram on the plane of the celestial meridian

... diagram on the plane of the celestial meridian 子午线平面图 diagram on the plane of the equinoctial 赤道平面图 ...

航海学基础... ... ② 横坐标值----天体方位( azimuth，A) ① 测者子午面天球图( diagram on the plane of the celestial meridian) ...