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详细讨论了地球自转的天文地球动力学效应 .地极移动和日长变化导致地球引力位系数产生时变特性并引起重力的摄动 .根据理论力学的基本概念 ,导出了由于地球自转变化引起的地球引力位系数变化、重力摄动、垂线偏差和地球形变的表达式 ,并定量地研究了极移和日长变化对测站重力观测值和地球形变的影响 .建议在高精度的空间大地测量中要顾及到地球自转变化引起的一系列效应 .
The kinetic effect of the earth's rotation on the astronomical geodynamics is discussed in detail.The movement of the earth's poles and the long change cause the time-varying characteristics of the earth's gravitation coefficient and cause the gravity perturbation.According to the basic concepts of theoretical mechanics, The earth's gravitation coefficient changes, the gravity perturbation, the vertical deviation and the earth's deformation expression, and quantitatively studies the pole shift and the long-term variation on the station gravity observation and the earth deformation.It is suggested that in the high-precision space earth The measurement should take into account a series of changes caused by the Earth's rotation.