Landsat-8卫星OLI成像仪调制传递函数在轨评测  

MTF On-orbit Evaluation of Landsat-8 Operational Land Imager

作　　者：梁瀚文[1,2] 冯钟葵[2] 陈勃[2] LIANG Hanwen FENG Zhongkui CHEN Bo(University of Chinese Academy of Sciences, Beijing 100049, China Institute of Remote Sensing and Digital Earth ,CAS, Beijing 100094,China)

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院遥感与数字地球研究所,北京100094

出　　处：《遥感信息》2017年第2期21-30,共10页Remote Sensing Information

摘　　要：鉴于传统调制传递函数(modulation transfer function,MTF)空间域分析结果受实验目标选择影响很大,应用EROS提出的频率域线状地物法对Landsat-8卫星OLI成像仪MTF进行在轨评测,并通过对比实验验证方法。基于目标和传感器特性分析,分别建立目标模型和系统传递函数模型,利用拟合数据求解模型参数,进而计算得到MTF值。并将EROS方法与传统T choi方法测得的MTF值进行对比。实验结果表明,EROS方法能有效应用于Landsat-8卫星OLI成像仪的MTF在轨测量,且明显减少了目标选择对于MTF评测结果的影响。For the problem that the results of traditional modulation transfer function（MTF）spatial domain method are highly influenced by experimental data, this paper uses the frequency domain line-feature method put forward by EROS to measure the on-orbit MTF of Landsat-8OLI. It then compares the experiments to verify the method. Firstly,target and system transfer function models are set up based on analysis of target and sensor features. Secondly,fitting data is used to solve model parameters. Finally,the models are used to calculate MTF values. MTF results of EROS method are compared with that of T choi method. Experimental results show that EROS method can be effectively applied to on orbit MTF evaluation of Landsat 8 OLI and significantly reduce the influence of target selection for the MTF evaluation results.

关 键 词：调制传递函数 MTF STF Landsat-8 OLI 

分 类 号：P237.9[天文地球—摄影测量与遥感]