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| 中高轨卫星广播星历精度分析 | |
| 引用本文： | 黄勇,胡小工,王小亚,黄珹,耿玉广.中高轨卫星广播星历精度分析[J].天文学进展,2006,24(1):81-88. |
| 作者姓名： | 黄勇 胡小工 王小亚 黄珹 耿玉广 |
| 作者单位： | 1. 中国科学院,上海天文台,上海,200030;中国科学院,研究生院,北京,100039 2. 中国科学院,上海天文台,上海,200030 3. 浙江省台州市黄岩区国土资源局,台州,318020 |
| 基金项目： | 国家自然科学基金资助项目(40374002)，中科院知识创新工程重要方向资助项目(KJCX2-SW-T1) |
| 摘 要： | GPS广播星历参数具有物理意义明确、参数少、精度高等优点,可以考虑将它应用于其他卫星导航系统。但是GPS系统的卫星构成比较单一,而其他卫星导航系统可能包含中地球轨道 (MEO)、倾斜地球同步轨道(IGSO)和地球静止轨道(GEO)等多种不同类型的中高轨卫星。分析了采用GPS广播星历参数时,MEO、IGSO和GEO卫星的广播星历拟合精度,特别讨论了轨道倾角接近于0的GEO卫星的广播星历拟合精度,并给出了相应的改进措施。计算表明,对于 MEO卫星,2 h的广播星历拟合精度(三维位置)可达厘米级;对于IGSO卫星和轨道倾角较大的GEO卫星,4 h的广播星历拟合精度约为0．1 m,径向位置误差在厘米量级;而对于轨道倾角接近于0的GEO卫星,若不采取特殊措施,由于轨道倾角和升交点经度统计相关,其广播星历拟合精度很差,为此提出了一种坐标转换方法。采用此方法后的广播星历拟合精度可达0．1 m,径向位置误差为厘米量级。 |
| 关 键 词： | 天体测量学 卫星导航系统 广播星历 中地球轨道(MEO) 倾斜地球同步轨道(IGSO) 地球静止轨道(GEO) |
| 文章编号： | 1000-8349（2006）01-0081-08 |
| 收稿时间： | 07 20 2005 12:00AM |
| 修稿时间： | 2005-07-202005-09-08 |
Precision Analysis of Broadcast Ephemeris for Medium and High Orbit Satellites |
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| HUANG Yong,HU Xiao-gong,WANG Xiao-ya,HUANG Cheng,GENG Yu-guang.Precision Analysis of Broadcast Ephemeris for Medium and High Orbit Satellites[J].Progress In Astronomy,2006,24(1):81-88. | |
| Authors: | HUANG Yong HU Xiao-gong WANG Xiao-ya HUANG Cheng GENG Yu-guang |
| Institution: | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 2. Graduate School of the Chinese Academy of Sciences, Belting 100039, China; 3. Bureau of Land and Resources of Huangyan District, Taizhou, Zhejiang Province, Taizhou 318020, China |
| Abstract: | The broadcast ephemeris parameters for GPS may be used in other satellite navigation system. Usually a satellite navigation system includes different kinds of satellites, for example, MEO (Medium Earth Orbits) satellites, IGSO (Inclined GeoSynchronous Orbits) satellites and GEO (Geostationary Earth Orbits) satellites. This paper studies the accuracy of broadcast ephemeris for above different kinds of satellite orbits using the broadcast ephemeris parameters for GPS, and especially analyses the accuracy of broadcast ephemeris for GEO satellites with near-zero-inclination. For MEO satellites, the fitting accuracy for 2 hours fitting arc can reach cm magnitude. For IGSO satellites and GEO satellites with not near-zero-inclination, the fitting accuracy for 4 hours fitting arc can reach 0.1 m, and the radial position error is cm magnitude. For GEO satellites with near-zero-inclination, the fitting accuracy is not good enough because of the correlation of parameters. A method of coordinate transformation is adopted to avoid correlation and to improve the fitting accuracy. Using this method for GEO satellites with near-zero-inclination, the fitting accuracy for 4 hours fitting arc can reach 0.1 m, and the radial position error is cm magnitude. |
| Keywords: | astrometry Satellite Navigation System (SNS) broad cast ephemeris MEO (Medium Earth Orbits) IGSO (Inclined GeoSynchronous Orbits) GEO (Geostationary Earth Orbits) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |