摘要
针对不同构形卫星星座的统一评价问题,提出了一种低轨星座覆盖性能的通用评价准则,可对不同构形和不同高度的星座对地覆盖性能进行统一评价。该准则将星座的对地仰角特性转化为具有相同覆盖能力的标准卫星数,以之同星座中实际卫星数的比值作为星座覆盖性能指数对星座实施评价。利用该评价准则,计算了Iridium、Globalstar、Celestri和NeLS四种星座构形覆盖性能的评价指数并提出了改进方法。
A general evaluation method for coverage performance of LEO constellations with different patterns and altitudes is proposed. The minimum elevation angle characteristics at different latitudes is transformed into the number of standard satellites with the same coverage performance, and the ratio with respect to the actual number of satellites in a constellation is define as the index of coverage performance. According to the evaluation method, the coverage indexes of four kinds of Walker-δ constellation including Iridium, Globalstar, Celestri and NeLS are computed, and the improved design method is brought forward.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2014年第4期410-417,共8页
Journal of Astronautics
基金
国家高技术研究发展计划(863计划)(2007AA01Z294)
中国博士后科学基金资助项目(2012M512066)
关键词
低轨卫星
星座设计
覆盖特性
评价方法
LEO
Constellation designing
Coverage performance
Evaluation method
