摘要
本文采用最新的卫星激光测距资料给出的地球二阶力学形状因子长期变化J2和月球平均运动的变化率nm，计算了地球自转变化中的非潮汐影响，并与有关作者的研究结果进行了比较。结果表明，近代空间观测技术能很有效地检测到地球自转变化中的非潮汐因素的影响。本文还对地球最大主转动惯量C的长期变化作了估计。
By means of the modern astrometric techniques tw0 observed spectacular results havebeen ohta1ned ln recent years. The flrst one was the secular deceleration nm of the M0on,smean rnoTion calcL1lated with I,unar Laser Range (LLR) data. The second result was thesecular variat1on of zonal second degree term J, obtained by Satell1te I,aser Range (SLR) dataof Starlette and I,ageos. As regards t11e research in the Earth,S angular velocity of rotation,the existence of the secu1ar term co. has been proved by many authors.In this paper, we estlmated the non tidal effect in the secular varlatlon of the angularvelocity of the Earth,s rotation wlth the observed average values of n., and to.. The exlstenceof the estimated n0n-tida1 term might also be confirmed by adopting the average observedvalue 0f J,- The secu1ar change of the Earth,s principal moment of inertia C is calculated, andit is indicate that our result contrary to the expanding Earth hypothesis.
出处
《中国科学院上海天文台年刊》
1995年第16期14-20,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家自然科学基金
