基于窄带雷达RCS序列的空间目标尺寸估计

Size Estimation of Space Object Based on Narrowband Radar

从窄带雷达横截面积(RCS)序列中提取目标尺寸特征对空间目标的分类识别具有重要价值.本文在研究椭球体RCS序列特性的基础上,提出了一种空间目标形状估计方法,并进一步研究了空间目标尺寸估计问题,提出了一种新的尺寸估计方法.实测数据的验证表明,该方法能有效估计卫星、碎片等空间目标的形状和二维尺寸.

Earth orbiting spacecrafts have become an integral part of our everyday lives.A real and growing concern for the safety and reliability of these satellites is the threat from collision with other orbiting objects including space debris.Size estimation of space object is an important task in evaluating its danger of a possible collision with operational spacecraft.RCS（Radar Cross Section） includes much information of space object,and extracting the feature of the object size from the RCS time series of narrowband radar is very helpful to radar target identification.Unfortunately,it is very difficult to get the information of target shape and size from its RCS.In this paper,based on the research of the characteristic of the ellipsoid＇s RCS,a shape estimation method of space object is proposed,and the problem of size estimation is studied further with a new method of size estimation proposed.The result using real radar data shows that this method is feasible to estimate the shape and two-dimensional sizes of the space object.