%0 Journal Article
%T Diffuse attenuation coefficient Kd(490)retrieval model for nearshore area of Bohai sea<br>渤海近岸水体漫衰减系数Kd(490)遥感反演模型
%A CUI Ting-wei
%A ZHANG Jie
%A MA Yi
%A SUN Ling
%A ZHAO Wen-jing
%A <br>崔廷伟
%A 张 杰
%A 马 毅
%A 孙 凌
%A 赵文静
%J 遥感学报
%D 2009
%I 
%X In this paper, a method to evaluate the in-flight MTF (Modulate Transfer Function) of the WFI (Wide Field Imager) on CBERS-02B is presented and the WFI images are restored. The CCD is another payload on CBERS-02B with high spatial resolution. Using the CCD images as high resolution images, the two-image comparison approach is applied to determine the MTF of the WFI with a pair of images acquired over Beijing on Nov. 10, 2007. As the results, MTF values in three directions are derived. The MTF values at Nyquist frequency in cross-track, in-track and 45° directions were respectively about 0.43, 0.52 and 0.35 for red band and 0.30, 0.46 and 0.36 for near-infrared band. Image-derived MTF values are applied to calculate the half bandwidths of the WFI. The results indicate that the instant fields of view of the WFI in the cross-track, in-track and 45o-track directions were respectively 1.188 pixels, 1.165 pixels and 1.281 pixels for red band, and respectively 1.258 pixels, 1.195 pixels and 1.326 pixels for near-infrared band. Weiner filter model is used to perform the MTF compensation for WFI images. The results show that the restored image seemed clearer and contained more detailed information.
%K Irrigated land is one of the most important parts in land cover classification system
%K but until now it has seldom been reported about extracting it from remote sensing data and monitoring its dynamic change
%K The existing researches are focused on the lan<br>渤海
%K 漫衰减系数Kd(490)
%K 遥感反射率
%K 反演模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=D09D738C9EFB0BFF71E24D9DAABD2FD6&yid=DE12191FBD62783C&vid=FC0714F8D2EB605D&iid=38B194292C032A66&sid=84A93BA251D28205&eid=9BA67A0B76A3DBA8&journal_id=1007-4619&journal_name=遥感学报&referenced_num=0&reference_num=35