摘要
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 astrogeodynamical effects of the earth's rotation are discussed in detail. The time-varying feature and the perturbation of gravity are mainly caused by polar motion and change in the length of the day. Based on theoretical mechanics, the expressions of geopotential coefficient variation, gravity's perturbation, vertical deriation and earth's deformation are drived out, and station gravity observations with earth's deformation fluenced by polar motion and change in the length of the day are studied at the same time. A series of effects caused by earth rotation are recommended to be taken into account in the high precision space geodesy.
出处
《地球物理学进展》
CSCD
2002年第3期424-429,共6页
Progress in Geophysics
基金
国家自然科学基金项目 (4 0 1740 0 2 )资助
