QAA在遥感影像反演中的性能评估与分析  

Assessment and Analysis of Quasi-Analytical Algorithm Applied to Remote Sensing Images

作　　者：邢帅[1] 刘宸博 王丹菂 李鹏程[1] 焦麟 XING Shuai;LIU Chenbo;WANG Dandi;LI Pengcheng;JIAO lin(Information Engineer University, Zhengzhou 450001, China;91937 Troops, Zhoushan 316000, China)

机构地区：[1]信息工程大学,河南郑州450001 [2]91937部队,浙江舟山316000

出　　处：《测绘科学技术学报》2020年第2期149-154,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41876105,41371436);近地面探测技术重点实验室基金项目(TCGZ2017A008)。

摘　　要：准分析算法QAA(Quasi-analytical algorithm)作为最常用的半分析反演算法被广泛应用于水体吸收系数和后向散射系数的反演,但目前对其在大范围遥感影像中的反演性能研究还较少。基于Sentinel-3系列卫星搭载的OLCI遥感影像,将朝鲜海峡、马六甲海峡、白令海峡和霍尔木兹海峡作为不同类别大范围水体的代表海域,并选取水体漫衰减系数作为间接评价参量,对QAA在4个海峡的反演性能进行了分析评估。结果表明,基于QAA计算得到的水体吸收系数和后向散射系数具有较高的精度和可靠性,而且反演精度与水质呈线性负相关,在Kd490等于0.05 m^-1左右时的反演精度最高。Quasi-analytical algorithm(QAA),as the common inversion algorithm,had been widely utilized to retrieve absorption coefficient and backscattering coefficient.However,the inversion performance of QAA in large-scale remote sensing images is still less studied at present.Based on OLCI remote sensing images carried on Sentinel-3 series satellites,this paper selected North Korea Strait,Strait of Malacca,Bering Strait and Hormuz Strait as representative waters of different types of large-scale water,and selected diffuse attenuation coefficient as indirect evaluation parameter to analyze and evaluate the inversion performance of QAA.The experimental results show that absorption coefficient and backscattering coefficient calculated based on QAA have well accuracy and reliability,besides,the inversion accuracy is linear negatively correlated with the water quality,and the highest inversion accuracy can be obtained when Kd490 is equal to about 0.05 m^-1.

关 键 词：QAA算法 海峡通道 吸收系数 后向散射系数 OLCI传感器 漫衰减系数 

分 类 号：P237[天文地球—摄影测量与遥感]