| Galileo完备性系统中WUL算法研究 |
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| 引用本文： | 谷守周,秘金钟,党亚民.Galileo完备性系统中WUL算法研究[J].测绘科学,2011,36(2):17-19. |
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| 作者姓名： | 谷守周 秘金钟 党亚民 |
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| 作者单位： | 中国测绘科学研究院;山东科技大学;武汉大学; |
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| 基金项目： | 科技部导航领域863项目(2007AA12Z313,2006AA12Z306,2007AA12Z316); 国家自然科学基金(40874012) |
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| 摘 要： | 本文详细分析了Galileo系统中WUL的计算步骤,首先把WUL点从空间固定到球体的一个大圆,确定出WUL在球体上的坐标,进而利用椭球和球之间的关系,把WUL点转化到椭球面上,最后通过实例进行分析可知,在相同误差不同的卫星位置之下,该WUL算法计算出的WUL距离误差都在厘米级且变化范围较小,最大差异为1.6cm;在同一...
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| 关 键 词： | 伽利略系统 最差用户位置 危险圆 轨道误差 高度角 |
Study of WUL algorithm of Galileo system |
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| GU Shou-zhou,MI Jin-zhong,DANG Ya-ming.Study of WUL algorithm of Galileo system[J].Science of Surveying and Mapping,2011,36(2):17-19. |
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| Authors: | GU Shou-zhou MI Jin-zhong DANG Ya-ming |
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| Institution: | ①②(①Chinese Academy of Surveying and Mapping,Beijing 100039,China;②Shandong University of Science and Technology,Shandong Qingdao 266510,China;③Wuhan University,Wuhan 430079,China) |
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| Abstract: | The paper analyzed the process of computing the Worst User Location(WUL)of Galileo system in detail.Firstly,it spatially determined WUL to a big circle of sphere,calculated the coordinate of WUL on the sphere,then transformed it from sphere to ellipsoid;lastly,used this method to calculate WUL.The result was that the distance errors based on the difference location of satellite and same orbit errors were in centimeter level with 1.6cm as greatest difference,and the distance errors based on the same location... |
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| Keywords: | Galileo system WUL dangerous circle orbit error elevation angle |
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