低轨卫星增强北斗三号导航星座性能分析Performance analysis of LEO satellites augmented BDS-3 navigation constellation
王慧珍,王广兴,牛飞,苏醒
摘要(Abstract):
针对低轨卫星星座有待合理化设计的问题,深入研究了低轨卫星星座增强北斗三号系统定位性能。分析轨道高度、轨道倾角、星座构型对星座覆盖性能的影响,仿真北斗三号、GPS和3种不同类型的低轨星座,研究各低轨星座与北斗三号、GPS的组合系统在所选7个测站以及全球范围内的可见卫星数和PDOP值分布。结果表明低轨卫星对北斗三号的增强效果主要与低轨卫星数目有关,且不同轨道倾角的组合低轨星座有利于均衡系统在全球范围内的可见卫星数与PDOP值分布。低轨卫星有望通过改善卫星观测几何构型提高北斗三号系统的定位性能,且增强效果与低轨星座构型密切相关。
关键词(KeyWords): 北斗三号;导航增强;低轨卫星;可见卫星数;位置精度衰减因子
基金项目(Foundation): 国家自然科学基金项目(41804033);; 中央高校基本科研业务费专项资金项目(CUGL180831);; 山东省自然科学基金项目(ZR2018PD006);; 武汉大学地球空间环境与大地测量教育部重点实验室开放基金资助项目(18-01-06)
作者(Author): 王慧珍,王广兴,牛飞,苏醒
DOI: 10.16251/j.cnki.1009-2307.2021.01.010
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