摘要
研究了空间观测序列图像目标运动性质仿真算法。首先,利用平均轨道根数(TLE)预测目标和搭载观测相机卫星在真赤道、平春分点(TEMED)坐标系的位置矢量,通过成像时相机与目标之间的几何关系对目标的运动性质进行了分析,同时对影响序列图像恒星位置的因素进行了分析;规范了成像定标中的星等与灰度的转换关系,用16bits灰度图像对星图进行仿真,扩大了星图的动态范围,提高了星图仿真的精度。最后,以搭载天基可见光探测器(SBV)的美国中段实验卫星轨道为载荷卫星运行轨道,对天基观测序列图像进行了仿真,结果表明本文给出仿真序列图像与美国公开发表的SBV相机拍摄图像基本一致。
A method of simulation for space target moving simulation based on space-based camera is presented. The TLEs are used to predict the relative position vector between the target and camera. From the geometric position the paper analysis moving characteristics of the target. At the same time, factors which can effect positions of the fixedstars are considered. Then ,the standard transformation between the photometric magnitudes and the gray level is put forward. Finally, supposing that the observing satellite orbit is the same as the MSX, the article analyzes the movement characteristics in serial images of the target. It has been proven that the simulated serial images are of high accordance to the SBV observation images.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第3期300-303,共4页
Laser & Infrared
关键词
空间观测
星图模拟
星等
两行轨道根数
space observation
star image simulation
photometric magnitude
two-line elements （TLE）
