摘要
以星对星激光雷达成像为应用背景,提出了一种基于啁啾脉冲信号的反射层析成像处理方法,该方法通过激光雷达多角度回波非相干累积实现高分辨率的图像重构;分析了星对星反射层析成像的实现条件,包括成像分辨率、工作模式及成像时间.研究结果表明,采用本文所提出的成像方法,通过同轨道面的伴星探测方式可以满足激光雷达反射层析成像多角度探测的要求,在观测角度范围大于60°时能够得到0.1m目标分辨率,角度范围越大,分辨率越高,且成像时间与卫星轨道半径和两星距离有关.实验验证了该方法的有效性和星对星反射层析成像的可行性.
Taking satellite-to-satellite ~idar imaging as application background, an imaging processing method based on chirped pulse for reflective tomography lidar is presented. In this method, high precision image reconstruction is obtained by extracting proiection data of different observation angle and using CBP algorithm. The condition of satellite-to-satellite lidar reflective tomography imaging is analyzed, including imaging resolution, working modes and imaging time. The results show that, the mode of accompanying satellite detecting in the same orbit plan meet the requirement of multiple angle detecting for lidar reflective tomography imaging. 0. 1 meter spacial resolution can be achieved while the range of detecting angle is larger than 60 degree, and the larger the range of angle, the higher the resolution is. The imaging time depends on the satellite orbit radius and the range between two satellites. Imaging experiment validates the feasibility and effectiveness of the presented method.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第1期48-53,共6页
Acta Photonica Sinica
基金
国家自然科学基金(Nos.60672154
60908033)
安徽省自然科学基金(No.1004060Q61)资助
关键词
反射层析
激光雷达
星对星成像
啁啾脉冲
空间分辨率
工作模式
Reflective tomography
Lidar
Satellite-to-satellite imaging
Chirped pulse
Spatialresolution
Working modes
