摘要
提出二维精简索引分层导航星库的构造方法。该方法把导航星分为局域亮星和局域暗星,以局域亮星为主构造星三角形,从而减少了存储三角形的数量;对星三角形进行二维精简索引,以提高检索效率、节约比对时间;通过参数的不同选择,可以转换为其他类型的导航星库。二维精简索引分层导航星库与分层星识别方法相配合,具有存储空间较少、识别速度较快的优点,适用于视场较大、探测星等较低的第2代星敏感器。
A method to construct delaminating guide s tar databas e with 2-D condensed index is given. By dividing guide star to local area brigh t star and local area dim star, star triangle is constructed by using local area bright mai nly to reduce the amount of triangle. By 2-D condensed index,hit the targe t rate of star identification is improved. By the different selecting of paramete rs, this guide star database can be transformed to others. For its small databas e size and high hit the target rate, 2-D condensed index delaminating guide sta r database as a reduced database is useful for second generation star tracker tha t has wide filed of view, low detectability of star magnitude.
出处
《吉林大学学报（信息科学版）》
CAS
2003年第2期123-127,共5页
Journal of Jilin University（Information Science Edition）
基金
国防重大科研项目
吉林大学青年教师基金资助项目(2001-055)
关键词
导航星数据库
星识别
星敏感器
二维索引
Guide star database
Star identification
Star tra cker
2-D index
