CAJ | 학술논문

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、作用距离的特点.以嫦娥一号绕月卫星平台为例,分析了基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,运用统计光学理,分析了探测信号的统计特性和信噪比.最后,基绕月卫星平台,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.
합성공경격광뢰체(SAL)시일충고분변솔적주동식성상뢰체,구유전천시、작용거리적특점.이항아일호요월위성평태위례,분석료기월면성상적합성공경뢰체적약간문제.수선,상세추도료광외차탐측신호적복수표체형식.연후,재광자수한상태하,운용통계광학리,분석료탐측신호적통계특성화신조비.최후,기요월위성평태,추도료SAL계통적상관삼수화탐측기획득적단개상원광자수,론증료해계통재이론상적가행성.
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.