利用2008～2009年VLBI数据进行日长变化的研究

¹武汉大学测绘学院,武汉市珞喻路129号,430079;²武汉大学地球空间环境与大地测量教育部重点实验室,武汉市珞喻路129号,430079;³武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079

基金项目: 国家973计划资助项目(2006CB701301)；国家863计划资助项目(2008AA12Z308)；国家自然科学基金资助项目(40774007)；武汉大学教学改革研究项目(20053039)

详细信息

Analysis of Length of Day with 2008-2009 VLBI Observations

¹School of Geodesy and Geomatics, Wuhan University,129 Luoyu Road, Wuhan 430079, China;(2 Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, 129 Luoyu Road, Wuhan 430079, China;(3 Research Center of GNSS, Wuhan University,129 Luoyu Road, Wuhan 430079, China

Funds: 国家973计划资助项目(2006CB701301)；国家863计划资助项目(2008AA12Z308)；国家自然科学基金资助项目(40774007)；武汉大学教学改革研究项目(20053039)

摘要: 处理了2008-01～2009-03的VLBI观测数据,提取了日长变化信息,并与IVS网站的结果进行了对比;计算了日长变化的月周期长度和半月周期长度;利用近几年VLBI数据中的日长变化信息绘制日长变化曲线,分析了日长的季节性变化及引起日长变化的因素。
- 甚长基线干涉测量 /
- 地球自转 /
- 日长变化
Abstract: We estimate the length of day(LOD) from VLBI observations during 2008-01-2009-03, and analyze its precision. And the estimated results are compared with the results from IVS. Then, the length of the month and half-month periods of the changes of LOD is computed. At the same time, the curve map is made with 2001-2009 VLBI observations to analyze the periods of Earth rotation, with which the seasonal changes is presented and analyzed. At last, the factors that possibly cause the changes of LOD are analyzed.
- VLBI /
- Earth rotation /
- LOD