| 最小GDOP组合Walker星座构型 |
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| 引用本文： | 薛树强, 杨元喜. 最小GDOP组合Walker星座构型[J]. 武汉大学学报 ( 信息科学版), 2016, 41(3): 380-387. DOI: 10.13203/j.whugis20130485 |
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| 作者姓名： | 薛树强 杨元喜 |
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| 作者单位： | 1.长安大学地测学院, 陕西 西安, 710054;;2.中国测绘科学研究院, 北京, 100830;;3.地理空间信息工程国家重点实验室, 陕西 西安, 710054 |
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| 基金项目： | 国家自然科学基金(41020144004,41104018, 41474011);国家科技支撑计划(2012BAB16B01);国家863计划(2009AA121405,2013AA122501); 北斗全球连续监测评估(GFZX0301040309);福建省海岛与海岸带管理技术研究实验室开放研究基金(201403)。 |
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| 摘 要： | 几何精度衰减因子(GDOP)是衡量定位构型优劣的重要指标,探讨最小GDOP定位构型的几何结构在单GNSS星座设计和多系统组合优化方面具有现实意义。在GNSS普遍采用的Walker构型的基础上,导出了最小GDOP组合Walker构型所应满足的条件方程。讨论了单一和组合Walker构型的GDOP地表覆盖性质。最后,通过仿真分析验证了主要结论。
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| 关 键 词： | GNSS星座 定位构型 Walker构型 测距方程 最优构型 |
| 收稿时间： | 2014-10-11 |
Combined Walker Configurations with Minimal GDOP |
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| XUE Shuqiang, YANG Yuanxi. Combined Walker Configurations with Minimal GDOP[J]. Geomatics and Information Science of Wuhan University, 2016, 41(3): 380-387. DOI: 10.13203/j.whugis20130485 |
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| Authors: | XUE Shuqiang YANG Yuanxi |
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| Affiliation: | 1.School of Geological and Surveying Engineering, Chang'an University, Xi'an 710054, China;;2.Chinese Academy of Surveying and Mapping, Beijing 100830, China;;3.National Key Laboratory for Geo-information Engineering, Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China |
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| Abstract: | The GDOP (geometric dilutions of precision) is a key criterion to measure the graphic intensity of single-point-positioning configurations. Revealing the geometry of configurations with minimal GDOP has practical significance in the optimization design of single GNSS satellite constellation or multi-constellations. From the common used Walker configuration, we deduce a conditional equation to the combined Walker configurations to minimize the GDOP. The GDOP distribution on the surface of the Earth is discussed in terms of the conditional equation for minimizing the GDOP. Simulations were performed to verify the main results. |
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| Keywords: | GNSS constellation positioning configuration Walker configuration distance equation optimal configuration |
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