| 高遮挡环境下卫星数不足四颗的GPS定位研究 |
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| 引用本文： | 刘涛,于兴旺.高遮挡环境下卫星数不足四颗的GPS定位研究[J].全球定位系统,2007,32(5):24-28. |
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| 作者姓名： | 刘涛 于兴旺 |
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| 作者单位： | 1. 新疆维吾尔自治区第二测绘院,新疆,乌鲁木齐,830002
2. 武汉大学测绘学院,湖北,武汉,430079 |
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| 摘 要： | 讨论了GPS接收机观测卫星数不足4颗条件下的GPS导航定位问题，提出拟合外推接收机钟差，联合大地高，地图匹配的方法，推导了相应的数学模型，并编程实现其算法，对实际车载动态GPS数据进行解算。解算结果表明：利用上述方法可以解决观测卫星数不足4颗条件下的GPS导航定位问题。
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| 关 键 词： | 卫星数不足 接收机钟差拟合 大地高 地图匹配 |
| 文章编号： | 1008-9268（2007）05-0024-05 |
| 收稿时间： | 2007-06-13 |
| 修稿时间： | 2007年6月13日 |
Study of GPS Positioning Algorithm with Insufficient Visible Satellites |
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| LIU Tao,YU Xing-wang.Study of GPS Positioning Algorithm with Insufficient Visible Satellites[J].Gnss World of China,2007,32(5):24-28. |
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| Authors: | LIU Tao YU Xing-wang |
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| Institution: | 1. Xinjiang No. 2 Academy Of Surveying And Mapping, Urumqi Xinjiang 830002; 2. School of Geodesy and Geomatics , Wuhan University, Wuhan H ubei 430079 |
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| Abstract: | This paper discusses the GPS navigation and positioning algorithm that visible satellites number is less than four. Extrapolating the receiver clock error fitting, joint priori ellipsoid height and map-matching, these three aided methods are proposed in this paper. Their mathematic models are deduced, and program based on these algorithms is implemented with GPS data collected by a moving car in urban canyon. The results indicate that using the proposal method can provide navigation location even under the condition of insufficient visible satellite. |
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| Keywords: | GPS |
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