周日、半日地球自转变化研究进展

发布时间：2018-02-27 23:28

本文关键词： 地球自转周日、半日变化日长变化极移海潮改正模型　出处：《天文学进展》2014年03期 　论文类型：期刊论文

【摘要】：主要介绍了周日、半日地球自转变化研究进展。首先介绍了周日、半日地球自转变化的研究发展历程以及主要激发因素,近几十年来,由于GPS、VLBI、SLR等观测技术和分析精度的提高,已能用几小时甚至1～2 h的观测数据求解地球自转参数(极移和自转速率变化),并从中检测到明显的周日、半日自转变化。与海潮模型所预测的结果进行比较,在主要的周日、半日潮波频率上,两者的振幅和相位符合得较好,特别是对UT1,符合度为90%左右,极移为60%左右。目前,仍有30%的极移周日、半日激发因素没有确定。然后对20世纪80年代以来关于极移和UT 1的周日、半日变化研究应用,以及不同的全球海潮改正模型作了较为全面的综述,现有的海潮改正模型存在10%～20%的误差,需要进一步的精化。最后对周日、半日地球自转变化的未来研究工作作了简单的展望。
[Abstract]:Mainly introduces the research progress of the earth rotation change Sunday, half day. First introduced the development course of half day Sunday, the variation of the earth rotation and the main motivating factor, in recent decades, due to the GPS, VLBI, SLR and other observation techniques and analysis accuracy, has been for a few hours or even 1~2 h for earth observation data rotation parameters (rotation rate changes and pole shift), and obvious Sunday from detection, half rotation. Compared with the change of ocean tide model predicts, in the main Sunday, semidiurnal wave frequency, amplitude and phase of the two well, especially for UT1, with about 90% that shift is about 60%. At present, there are still 30% of the pole shift on Sunday, half excited factors did not determine. Then on Sunday about the pole shift and UT 1 since 1980s, the research and application of semi diurnal variation, with the global ocean tide correction model A comprehensive review is made. The existing ocean tide correction model has 10% to 20% error and needs further refinement. Finally, the future research work of earth rotation on Sunday and half day is prospected briefly.

【作者单位】：中国科学院上海天文台;华东师范大学信息科学技术学院;中国科学院行星科学重点实验室;
【基金】：国家自然科学基金(11303073,11373017,11373057) 上海市科学技术委员会(06DZ22101)
【分类号】：P183.31

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