中国空间科学技术

中国空间科学技术

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一种模拟CCD星图的方法

张钧萍,林涛,周建林,钱国蕙   

  1. 哈尔滨工业大学
  • 发布日期:1999-06-25

A Method of CCD Star Image Simulation

Zhang Junping Lin Tao Zhou Jianlin Qian Guohui (Harbin Institute of Technology,Harbin 150001)   

  • Online:1999-06-25

被引次数

55

摘要： 星识别算法在空间飞行器自主姿态确定系统中是不可缺少的。同时将ＣＣＤ所拍摄的星图作为算法的输入，无论是软件调试还是地面试验，抑或是对各种算法的评估，也是必不可缺少的。介绍一种利用计算机模拟ＣＣＤ拍摄的星空图片的方法，它包括提取观测星，将观测星进行位置坐标和灰度的转换，并按照ＣＣＤ相机的参数进行归一化等步骤，获得模拟的星图。经过与识别算法结合使用，证明了该方法是可行的。

关键词: CCD摄影机, 恒星, 图像, 计算机仿真, 方法

Abstract: Star identification algorithm is necessary for autonomous attitude determination systems of spacecraft.Being the input of the algorithm,the star pictures imaged by CCD on a star sensor are indispensable for the software debugging,for ground experiments as well as for the evaluation of various star identification algorithms.This paper presents a method of CCD sky map simulation for star sensors,which includes the following procedures:extraction of the observed stars,transformation of position coordinates and grey ness normalization according to CCD camera's parameters,and acquirement of the simulated star pictures.The method has been showed to be feasible by using star identification algorithms.