| 不同卫星高度角对GPS/GLONASS/BDS/Galileo融合定位的影响 |
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| 引用本文： | 覃继前,徐宁辉,梁月吉.不同卫星高度角对GPS/GLONASS/BDS/Galileo融合定位的影响[J].全球定位系统,2021,46(2):62-68. |
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| 作者姓名： | 覃继前 徐宁辉 梁月吉 |
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| 作者单位： | 1.南宁勘察测绘地理信息院，南宁 530001 |
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| 摘 要： | 研究不同卫星高度角对GPS/GLONASS/BDS/Galileo(G+R+B+E)融合定位的影响，并建立了相应的模型. 采用MGEX(Multi-GNSS Experiment)提供的全球卫星导航系统(GNSS)数据，经理论分析和算例表明:G+R+B+E组合使得参与定位的有效卫星增多，在不同的卫星高度角下均能保证较多的卫星数，保证较好的空间几何分布结构；组合系统达到一定的卫星数后，卫星高度角对定位结果影响不大；当卫星高度角大于30°时，相对于单一的GPS定位G+R+B+E在3D方向的外符合定位精度有所改善.
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| 关 键 词： | 卫星高度角 多系统 卫星可见数 位置精度衰减因子(PDOP) 精度分析 |
| 收稿时间： | 2020-10-20 |
The influence of different satellite altitude angles on GPS/GLONASS/BDS/Galileo fusion positioning |
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| Institution: | 1.Nanning Surveying and Mapping Geographic Information Institute, Nanning 530001, China2.College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | This paper studied the offects of different satellites elevation on GPS/GLONASS/BDS/Galileo (G+R+B+E) fusion positioning and corresponding model was established. Using global navigation satellite system (GNSS) data provided by MGEX(Multi-GNSS Experiment), the theoretical analysis and experiments showed that, combination of G+R+B+E increased the number of satellite used for positioning, and could ensure a relative large number of satellites and a good space geometric distribution structure. Satellites elevation had little effect on positioning result when the satellites of combined system reached a certain number. External error accuracy of G+R+B+E combination in 3D direction was improved when satellites elevation was larger than 30°. |
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