| 卫星导航中几何精度衰减因子最小值分析及应用 |
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| 引用本文： | 李建文,李作虎,周巍,斯顺杰.卫星导航中几何精度衰减因子最小值分析及应用[J].测绘学报,2011(Z1):85-88,94. |
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| 作者姓名： | 李建文 李作虎 周巍 斯顺杰 |
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| 作者单位： | 信息工程大学测绘学院;武汉大学卫星导航定位技术研究中心;63883部队;78138部队; |
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| 基金项目： | 中国卫星导航学会青年优秀论文获奖者资助课题基金(CSNC2010-QY-012); 信息工程大学博士研究生学位论文创新基金(YJ201004); 卫星导航与定位教育部重点实验室(B类)开放课题基金(GRC-2009005) |
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| 摘 要： | DOP是评估卫星导航定位性能的重要手段之一。在分析GDOP的数学意义和测量意义的基础上,提出两种GDOP最小值的求解方法,并对最小值进行理论分析。结果表明,传统场合中认为DOP为"精度衰减"因子是有局限性的;随着卫星与用户几何关系的改变,包括GDOP在内的所有DOP完全可以小于1,从而具有一定的精度增强作用。在此基础上,提出一种评价星座空间分布均匀程度的星座几何构型品质因数,并以GPS和Galileo星座为例进行试验,结果表明该因数可以较好地评价星座的空间分布均匀程度。基于GPS星座在近地空间内导航精度性能的试验结果很好地证明了DOP具有精度增强的属性。
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| 关 键 词： | 卫星导航 精度 精度因子 星座 性能评估 |
Study on the Minimum of GDOP in Satellite Navigation and Its Applications |
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| LI Jianwen,LI Zuohu,ZHOU Wei,SI Shunjie.Study on the Minimum of GDOP in Satellite Navigation and Its Applications[J].Acta Geodaetica et Cartographica Sinica,2011(Z1):85-88,94. |
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| Authors: | LI Jianwen LI Zuohu ZHOU Wei SI Shunjie |
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| Institution: | LI Jianwen,LI Zuohu,ZHOU Wei,SI Shunjie 1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052 China,2.Research Center of GNSS,Wuhan University,Wuhan 430079 China,3.63883 Troops,Luoyang 471003 China,4.78138 Troops,Chengdu 610036 China |
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| Abstract: | The DOP is one of the ways to assessment the performance of satellite navigation and positioning.Based on the mathematical and surveying meanings of GDOP,two methods to get the minimum of GDOP were given,and the study on the minimum was made theoretically.The conclusion was drawn that,the traditional idea that DOP is just a factor to decrease the navigation & positioning precision was limited,since all DOPs including GDOP would certainly be less than one and improve the precision as a result with the change... |
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| Keywords: | satellite navigation precision DOP constellation performance evaluation |
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