摘要
为实现对敏感器的地面标定与精度测试,需研制一套恒星地球模拟器,要求其星间角距模拟精度优于10″,地球张角模拟精度优于0.05°.通过设计高精度准直光学系统与高精度紫外准直光学系统,实现了对星点位置与地球图像的无穷远距离模拟;提出了星点位置模拟误差修正方法与地球图形模拟误差修正方法,提高星间角距和地球张角的模拟精度.实测星间角距与地球张角模拟结果表明,该模拟器的星间角距模拟精度优于10″,地球张角模拟精度优于0.02°.
In order to realize the ground calibration and accuracy testing of sensor,a star and Earth simulator is needed to achieve the star simulation accuracy of less than 10 ' and Earth simulation accuracy of 0.05°.The simulator utilizes a high precision collimator and a high precision UV collimator as the projection optical system.A correction method for star position simulation error and Earth graphics simulation error is proposed to improve the simulation precision of the star and the Earth.Finally,the star angular distance is measured which accuracy is better than 10',and the accuracy of the Earth graphics is better than 0.05°.The investigation result indicates that the star and Earth simulator proposed in this paper is possible to satisfy the requirements of ground calibration and accuracy testing of the sensor.
出处
《空间科学学报》
CAS
CSCD
北大核心
2015年第5期641-646,共6页
Chinese Journal of Space Science
关键词
恒星地球模拟器
光学系统
星间角距
地球张角
Star and Earth simulator
Optical system
Star angular distance
Angular of Earth
