Greenwich hour angle格林时角;格林威治时角;格林威治时间角度
easterly hour angle东时角
mean sun hour angle平均太阳时角
s greenwich hour angle太阳格林时角
hour angle difference子午角差;[天] 子午圈角差
hour angle Greenwich格林威治小时角度
sunset hour angle日落时角
celestial local hour angle天体地方时角
N（名词） the angular distance along the celestial equator from the meridian of the observer to the hour circle of a particular celestial body 时角