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Yaw attitude of eclipsing GPS satellites and its impact on solutions from precise point positioning

ISSN号：1001-6538
期刊名称：科学通报(英文版)
时间：0
页码：3687-3693
语言：中文
分类：P228.4[天文地球—大地测量学与测量工程;天文地球—测绘科学与技术] V412[航空宇航科学与技术—航空宇航推进理论与工程;航空宇航科学技术]
作者机构：[1]Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China, [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
相关基金：This work was supported by the National Science Foundation for Distinguished Young Scholars （40625013）, the National Natural Science Foundation of China （40890160 and 40874009）, and the National High-Tech Research and Development Program of China （2007AA12Z311, 2007A- A12-Z305）.
相关项目：大地测量学(物理大地测量、动力大地测量)

作者： Yuan YunBin|Ou JiKun|Zhong ShiMing|Zhang BaoCheng|

关键词： GPS卫星, 偏航, 单点定位, 姿态, 全球导航卫星系统, 卫星时钟, 购买力, IGS, eclipsing GPS satellite, satellite body-fixed coordinate system, International GNSS Service combined clock solutions, precise point positioning, yaw attitude model

中文摘要：

当一颗 GPS 卫星，地球和太阳是近似在同一直线上的时，在时期期间，超越卫星的现象发生，当时卫星偏航态度从它的名字的盒子背离，即身体X轴不能为块 IIR 卫星为块 II&IIA 或离开它向太阳指。超越的卫星的 yaw 态度在两个上有重要影响在每个国际 GNSS 服务(IGS ) 分析中心(交流) 的卫星钟评价并且为放的精确的点(PPP ) 的用户实现。这被知道在超越的时期期间，不一致偏航在交流之中的态度模型将贡献 IGS 的错误联合的钟产品。至于 PPP 用户，超越的卫星的影响是双重的。首先，作为卫星，钟总是被使实现在 PPP 期间固定了，上述有问题的 IGS 钟将不可避免地被传递到 PPP 估计。第二，不适当偏航态度当模特儿超越的卫星将引起为二种态度相关的系统的错误超过 1 dm 的修正偏爱，也就是，阶段终结和卫星天线阶段集中偏移量，它将进一步败坏 PPP 答案的精确性。A 偏航态度模型与在超越时期的卫星期间改进 PPP 答案的可靠性的目的在这份报纸被介绍。

英文摘要：

During the period when a GPS satellite, the Earth and the Sun are approximately collinear, the phenomenon of eclipsing the satellite occurs, when the satellite yaw attitude deviates from its nominal case, i.e. the body X-axis cannot point towards the Sun for Block II＆IIA or away from it for Block IIR satellites. The yaw attitude of the eclipsing satellites has a significant influence on both the satellite clock estimation at each International GNSS Service （IGS） Analysis Center （AC） and for users of the precise point positioning （PPP） implementations. It is known that, during the eclipsing periods, inconsistent yaw attitude models among the ACs will contribute to the errors of the IGS combined clock products. As for the PPP user, the influence of the eclipsing satel- lite is two-fold. First, as the satellite clocks are always kept fixed during PPP implementation, the above-mentioned problematic IGS clocks will inevitably be passed on to the PPP estimates. Second, the improper yaw attitude modeling of the eclipsing satellite will cause a correction bias exceeding 1 dm for the two kinds of attitude-related systematic errors, namely the phase wind-up and satellite antenna phase center offset, which will further deteriorate the accuracy of the PPP solutions. A yaw attitude model is introduced in this paper with the aim of improving the reliability of PPP solutions during the satellite eclipsing period.

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