Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network
文献类型：期刊论文
| 作者 | Zhou ShanShi1,2 ; Hu XiaoGong1; Wu Bin1; Liu Li3; Qu WeiJing1; Guo Rui3; He Feng3; Cao YueLing1; Wu XiaoLi3; Zhu LingFeng3
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| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 出版日期 | 2011-06-01 |
| 卷号 | 54期号:6页码:1089-1097 |
| 关键词 | POD time synchronization clock errors elimination SLR evaluation |
| 英文摘要 | Aiming at regional services, the space segment of COMPASS (Phase I) satellite navigation system is a constellation of Geostationary Earth Orbit (GEO), Inclined Geostationary Earth Orbit (IGSO) and Medium Earth Orbit (MEO) satellites. Precise orbit determination (POD) for the satellites is limited by the geographic distribution of regional tracking stations. Independent time synchronization (TS) system is developed to supplement the regional tracking network, and satellite clock errors and orbit data may be obtained by simultaneously processing both tracking data and TS data. Consequently, inconsistency between tracking system and TS system caused by remaining instrumental errors not calibrated may decrease navigation accuracy. On the other hand, POD for the mixed constellation of GEO/IGSO/MEO with the regional tracking network leads to parameter estimations that are highly correlated. Notorious example of correlation is found between GEO's orbital elements and its clock errors. We estimate orbital elements and clock errors for a 3GEO+2IGSO constellation in this study using a multi-satellite precise orbit determination (MPOD) strategy, with which clock error elimination algorithm is applied to separate orbital and clock estimates to improve numerical efficiency. Satellite Laser Ranging (SLR) data are used to evaluate User Ranging Error (URE), which is the orbital error projected on a receiver's line-of-sight direction. Two-way radio-wave time transfer measurements are used to evaluate clock errors. Experimenting with data from the regional tracking network, we conclude that the fitting of code data is better than 1 m in terms of Root-Mean-Square (RMS), and fitting of carrier phase is better than 1 cm. For orbital evaluation, difference between computed receiver-satellite ranging based on estimated orbits and SLR measurements is better than 1 m (RMS). For clock estimates evaluation, 2-hour linear-fitting shows that the satellite clock rates are about 1.E-10 s/s, while receiver clock rates are about 1x10(-13)-1x10(-12) s/s. For the 72-hour POD experiment, the average differences between POD satellite clock rates estimates and clock measurements based on TS system are about 1x10(-13) s/s, and for receiver clock rates, the differences are about 1x10(-15) s/s. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000290768500015 |
| 源URL | [http://119.78.226.72/handle/331011/28115]  |
| 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 3.Beijing Global Informat Applicat & Dev Ctr, Beijing 100094, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou ShanShi,Hu XiaoGong,Wu Bin,et al. Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(6):1089-1097. |
| APA | Zhou ShanShi.,Hu XiaoGong.,Wu Bin.,Liu Li.,Qu WeiJing.,...&Tan HongLi.(2011).Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(6),1089-1097. |
| MLA | Zhou ShanShi,et al."Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.6(2011):1089-1097. |
入库方式： OAI收割
来源：上海天文台
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