Analysis of the characteristics of the harmonics coefficient J (2) of the Earth's gravity field in different periods
文献类型：期刊论文
| 作者 | Qu WeiJing1,2 ; Wu Bin1
|
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2012-05-01 |
| 卷号 | 57期号:14页码:1626-1630 |
| 关键词 | satellite laser ranging geopotential Lageos 1 satellite Lageos 2 satellite |
| 英文摘要 | The characteristics of the geopotential coefficient J (2) in different periods are analyzed using satellite laser ranging data spanning the last 27 years. The satellites used in the analysis are Lageos1 and Lageos2. The variations in J (2) are obtained by determining the dynamic orbit. The results show that there are strong seasonal and long-term variations. For different data spans, the seasonal variations agree well in terms of both amplitude and phase. Using all the data, the amplitude and phase of the annual term are 2.5 x 10(-10) and 127A degrees, respectively, while the amplitude and phase of the semiannual term are 0.94 x 10(-10) and 213A degrees, respectively. In the case of long-term variation, the secular variation in J(2) ((J) over dot(2)) is - 2.2 x 10(-11) a(-1) from 1984 to 2010. 2 differs for the different periods because of interannual variations, such as the "1998 anomaly". Another anomaly may have taken place during 2007-2010. Although the cause of the anomaly is unknown, it is an important observational constraint on the shape of the Earth. |
| WOS标题词 | Science & Technology |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | PRECISE ORBIT DETERMINATION ; DEGREE ZONAL HARMONICS ; TEMPORAL VARIATIONS ; GRAVITATIONAL-FIELD ; MASS REDISTRIBUTION ; SEASONAL-VARIATIONS ; LAGEOS ; ACCURACY ; EXCITATION ; GPS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000303388600005 |
| 源URL | [http://119.78.226.72/handle/331011/18118]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu WeiJing,Wu Bin. Analysis of the characteristics of the harmonics coefficient J (2) of the Earth's gravity field in different periods[J]. CHINESE SCIENCE BULLETIN,2012,57(14):1626-1630. |
| APA | Qu WeiJing,&Wu Bin.(2012).Analysis of the characteristics of the harmonics coefficient J (2) of the Earth's gravity field in different periods.CHINESE SCIENCE BULLETIN,57(14),1626-1630. |
| MLA | Qu WeiJing,et al."Analysis of the characteristics of the harmonics coefficient J (2) of the Earth's gravity field in different periods".CHINESE SCIENCE BULLETIN 57.14(2012):1626-1630. |
入库方式： OAI收割
来源：上海天文台
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