′The Belt and Road′ Surrounding Areas BDS Dynamic Positioning Performance Analysis
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摘要: 本文通过STK软件对BDS全球组网时至当前的星座结构进行了动态仿真,确定了“一带一路”沿线及周边地区最小可见卫星数、GDOP值以及定位误差的动态变化过程。结果表明,当前BDS已实现“一带一路”沿线大部分地区的覆盖,中国大陆、东南亚、南亚等地区的定位精度优于13 m,但北欧、东欧、西亚等小部分地区的定位精度仍有待提高;MEO卫星较GEO／IGSO卫星对“一带一路”沿线及周边地区定位精度的提升作用要大;同时发现,随着可见卫星数的增加,GDOP值逐渐减小,但当可见卫星数达到一定值时,随着可见卫星数的增加,GDOP值的减小幅度不明显,说明单纯增加可见卫星数有时并不完全能提高定位精度。Abstract: In this paper, uses STK software for BDS global network constellation structure to sign the current structure of the simulation, the dynamic changes of the areas along “The Belt and Road” minimum visible satellite number, GDOP value, and the positioning precision of the positioning performance. The results show that, BDS has been able to cover most areas of “The Belt and Road”, China, Southeast Asia, South Asia and other regions of the positioning accuracy is better than 13meter,but the accuracy of positioning in small parts of Northern Europe, Eastern Europe and West Asia has yet to be improved. The GEO satellite over the GEO／IGSO satellite of “The Belt and Road” surrounding areas along the role to the improvement of the positioning accuracy. In addition, with the increase of the number of visible satellites, the GDOP value decreased gradually, but when the visible satellite number reaches a certain value, with the increase of the number of visible satellites, the GDOP value decrease is not significant, that means increasing the number of visible satellites is not certain can improve the positioning accuracy.
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Key words:
- The Belt and Road /
- least visible satellite /
- GDOP value /
- positioning accuracy /
- dynamic change
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