摘要
合成孔径激光雷达(SAL)是一种高分辨率的主动式成像雷达,具有全天时、作用距离远的特点。以嫦娥一号绕月卫星平台为例,分析了基于月面成像的合成孔径雷达的若干问题。首先,详细推导了光外差探测信号的复数表达形式。然后,在光子受限状态下,运用统计光学原理,分析了探测信号的统计特性和信噪比。最后,基于绕月卫星平台,推导了SAL系统的相关参数和探测器获得的单个像元光子数,论证了该系统在理论上的可行性。
Synthetic aperture ladar（SAL） is a kind of high-resolution active imaging ladar, which operates under day and night and long distance conditions. Taking the platform of lunar satellite Chang＇e-1 as an example, several problems about SAL were ananlyzed based on lunar surface imaging. Then, using the theory of statistical optics, the statistical characteristics and signal-to-noise ratio of detect signal in photo-limited regime were analyzed. Finally, the related parameters and total number of photons of SAL system was derived based on the lunar satellite platform and it was proved to be feasible in theory.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第3期621-625,共5页
Infrared and Laser Engineering
基金
国家重点基础研究发展计划(973)项目(2009CB724004)
关键词
合成孔径激光雷达
信噪比
光子数
光子受限
synthetic aperture ladar
signal-to-noise ratio
number of photons
photon-limited
