经纬度相关的似均匀星表划分方法

针对传统的基于经纬度或均匀星表划分方法的不足,构建了一种经纬度信息相关的准均匀星表划分方法.以天球内接正8面体对天球表面进行第一层次剖分,在2维经纬度网格上进行三角网格划分,将划分结果映射到天球3维表面上,得到似均匀的星表划分结果.分析结果表明:该方法既能构建天球表面的准均匀分布网格,又能留存数据的经纬度信息特征,使导航星表的查询和应用效率得到提升.

Quasi-uniform Division of Guide Star Catalogue inConsideration of Latitude and Longitude

The traditional guide star catalogue division methods include latitude/longitude based methods and uniform spherical subdivision methods. It constructs a quasi-uniform catalog division method in consideration of latitude and longitude information. It firstly performs a triangular mesh division on a 2 dimensional grid of latitude and longitude. Then it maps the division results onto the 3 dimensional surface of the celestial sphere. As a result, this division method has the property of quasi-uniformity. Analysis shows that the method can eatlbish quasi-uniformity mesh of celestial sphere surface, keep the latitude and longitude information feature of data, and improve queries and application efficiency of catalog navigation.