azimuth of heavenly bodies天体方位角
gravitational heavenly bodies引潮天体
true motion of heavenly bodies天体真运动
Earth Tides is a subject which holds a key position in relation to geophysics, geodesy and astronomy, since it is a phenomenon which consists of an elastic-viscous deformation of the terrestrial globe, and this is caused by the gravitational action of the Moon, the Sun, and other Heavenly Bodies.
固体潮是地球整体在月亮和太阳等天体引潮力的作用下产生的一种粘弹性形变的现象,因而是一门连接地球物理学、大地测量学和天文学的学科。
参考来源 - 低频信号的精确采集与处理