| 重力场长周期变化的观测与理论结果比较 |
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| 引用本文： | 朱耀仲.重力场长周期变化的观测与理论结果比较[J].武汉大学学报(信息科学版),2001,26(6):539-543. |
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| 作者姓名： | 朱耀仲 |
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| 作者单位： | 中国科学院测量与地球物理研究所,武汉市徐东路54号,430077 |
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| 基金项目： | 中科院知识创新工程资助项目(KZCX2-106);国家攀登计划资助项目(970231003). |
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| 摘 要： | 利用Chandler摆动周期作为约束，估计了地幔滞弹性对地球二阶带谐响应系数κ、带谐位系数J2和卫星轨道升交点Ω的影响，理论预测的长周期潮汐参数被用来与人卫激光测距（SLR）观测结果进行比较。结果表明，SLR确定的长周期潮汐解已能检测到地幔滞弹性的影响。考虑地幔滞弹性和非平衡海洋潮汐效应后，理论预测的18．6a潮汐参数与SLR潮汐解基本相符。
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| 关 键 词： | 重力场 潮汐 地幔滞弹性 人卫激光测距 大地测量学 长周期变化 |
| 文章编号： | 1000-050(2001)06-0539-05 |
| 修稿时间： | 2001年9月26日 |
Comparison of Observed and Predicted Long-period Changes in the Earth's Gravity Field |
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| ZHU Yaozhong.Comparison of Observed and Predicted Long-period Changes in the Earth''''s Gravity Field[J].Geomatics and Information Science of Wuhan University,2001,26(6):539-543. |
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| Authors: | ZHU Yaozhong |
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| Institution: | ZHU Yaozhong 1 |
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| Abstract: | The effects of mantle anelasticity on the Earth's second_degree zonal response coefficient,the zonal geopotential coefficient and the orbital node of geodetic satellites are assessed by using the period of the Chandler wobble as a constraint.The theoretically_predicted parameters for the long_period tides are used to compare the results obtained by satellite laser ranging (SLR) measurements to near_Earth geodetic satellites.The results show that the long_period tide solutions determined by SLR can detect the effect of mantle anelasticity.After taking into account the effects of mantle anelasticity and non_equilibrium ocean tide,the theoretical predicted parameters for the 18.6 a tide are in general agreement with the SLR tide solution. |
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| Keywords: | gravity field tide mantle anelasticity satellite laser ranging |
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