%0 Journal Article
%T Impact of rainfall on a Ku-band rotating fan-beam scatterometer<br>降雨对Ku波段旋转扇形波束散射计影响(英文)
%A LI Jiamei
%A TJUATJA Saibun
%A DONG Xiaolong
%A ZHU Di
%A <br>李佳美
%A TJUATJASaibun
%A 董晓龙
%A 朱迪
%J 遥感学报
%D 2013
%I 
%X The effects of rainfall backscattering on space-borne rotating fan-beam scatterometer measurements at Ku-band were investigated in this study. A new scattering model based on Integral Equation Method (IEM) for sea surface with precipitation that accounts for the effects of rain column was presented. The relation between rain scattering and incidence was analyzed, and hence the rain effects on a rotating fan-beam scatterometer are obtained. The rain column is modeled as sublayers with different physical characteristics determined by the vertical profile of rainfall. Each sublayer is assumed to be statistically homogeneous, and the gamma distribution is used to model the drop size distribution within each sublayer. Sea surface is modeled as a rough surface, and its backscattering is calculated using the IEM model. Multiple scattering within and interactions between the rain layers and sea surface are accounted for in the matrix doubling formulation. The presented model is validated using published TRMM PR measurements. Results from model analyses show that rain effects are incident angle dependent, which can lead to non-uniform impacts within the footprint of a fan-beam scatterometer; these effects are strongly related to rain column vertical profile and rain rate, as different rain rate corresponds to different physical parameters.
%K scatterometer
%K rainfall
%K multiple scattering
%K vertical profile
%K fan-beam<br>散射计
%K 降雨
%K 多次散射
%K 垂直分布
%K 扇形波束
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=AE8DAD4245F3E9A90E2E5B3E6199AF74&yid=FF7AA908D58E97FA&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=10F298ED9F164662&eid=F24949CFDB502409&journal_id=1007-4619&journal_name=遥感学报&referenced_num=0&reference_num=15