摘要
采用星等阈值法制备导航星表,存在导航星分布不均匀的问题,影响航天器姿态解算精度。利用SKY2000星表,采用基于类赤经-赤纬对天球分区的方法,将天球划分为3600个3°×3°的子区域,对存储在每个子区域内的恒星进行特定规则的筛选。实验表明,利用该方法得到的导航星表,导航星数量少,分布均匀性好,并且可以通过改变子区域的大小,满足不同星敏感器的要求。
Constructing a guide star catalogue with MFM has the problem of uneven distribution of guide star, which affects the calculating accuracy of spacecraft＇ s attitude. With 3 600 partitions （3 ° x 3 °） , a new partition method of celestial sphere based on similar-right-ascension and declination was presented. The stars stored in every partition will be selected out from SKY2000 STAR CATALOGUE in a specific rule. It is indicated from the test that the guide star catalogue constructed by this approach has fewer stars and good distribution uniformity. By changing the size of the partition, the requirements of different star sensors can be satisfied.
出处
《科学技术与工程》
北大核心
2013年第32期9777-9781,共5页
Science Technology and Engineering
基金
国家自然科学基金(61201121)资助
关键词
星敏感器
导航星表
星等过滤
天球分区
star sensor guide star catalogue magnitude filtering partition of celestial sphere
