CAJ | 학술논문

由于大气环境的变化，大气气溶胶污染对光学遥感器成像品质的影响越来越受到载荷研制部门的重视。天基光学遥感系统成像过程中，受到大气气溶胶退化的影响使得光学遥感器成像品质的恶化。大气导致图像质量降低主要原因之一是气溶胶混浊介质引起的前向光散射。根据气溶胶辐射特性，利用混浊介质辐射传输方程，推导了包含气溶胶光学特性的大气点扩散函数模型。根据此模型，定量化分析与评价其对光学遥感器成像的大气模糊效应。研究发现气溶胶介质除了对遥感器成像过程中大气透过率能量衰减影响外，更重要的是由于散射对成像质量产生退化作用，大气气溶胶光学厚度的增加使得气溶胶散射强度的增强，气溶胶光学厚度的变化同样强烈的影响着点扩散函数的空间分布范围，正是因为气溶胶在空间域内对图像产生的退化作用，使得遥感图像质量降低，尤其是图像清晰度的下降。同时，该模型也为遥感图像仿真中，大气链路环节的优化与改进提供了参考依据与模型方法。
유우대기배경적변화，대기기용효오염대광학요감기성상품질적영향월래월수도재하연제부문적중시。천기광학요감계통성상과정중，수도대기기용효퇴화적영향사득광학요감기성상품질적악화。대기도치도상질량강저주요원인지일시기용효혼탁개질인기적전향광산사。근거기용효복사특성，이용혼탁개질복사전수방정，추도료포함기용효광학특성적대기점확산함수모형。근거차모형，정양화분석여평개기대광학요감기성상적대기모호효응。연구발현기용효개질제료대요감기성상과정중대기투과솔능량쇠감영향외，경중요적시유우산사대성상질양산생퇴화작용，대기기용효광학후도적증가사득기용효산사강도적증강，기용효광학후도적변화동양강렬적영향착점확산함수적공간분포범위，정시인위기용효재공간역내대도상산생적퇴화작용，사득요감도상질량강저，우기시도상청석도적하강。동시，해모형야위요감도상방진중，대기련로배절적우화여개진제공료삼고의거여모형방법。
In recent years ,due to changes in atmospheric environment ,atmospheric aerosol affection on optical sensor imaging quality is increasingly considered by the load developed departments .Space-based remote sensing system imaging process ,at-mospheric aerosol makes optical sensor imaging quality deterioration .Atmospheric medium causing image degradation is mainly forward light scattering effect caused by the aerosol turbid medium .Based on the turbid medium radiation transfer equation ,the point spread function models were derived contained aerosol optical properties of atmosphere in order to analyze and evaluate the atmospheric blurring effect on optical sensor imaging system .It was found that atmospheric aerosol medium have effect on not only energy decay of atmospheric transmittance ,but also the degradation of image quality due to the scattering effect .Increase of atmospheric aerosol optical thickness makes aerosol scattering intensity enhanced ,variation of aerosol optical thickness is also strongly influences the point spread function of the spatial distribution .it is because the degradation of aerosol in spatial domain , which reduces the quality of remote sensing image ,in particularly reduction of the sharpness of image .Meanwhile ,it would pro-vide a method to optimize and improve simulation of atmospheric chain .