中文摘要：

这份报纸建议二个简单模型，查找桌子(LUT ) 模型和实验模型，到直接检索重要波浪高度(H _s ) 使用合成的孔雷达(SAR ) 方位角截止( _c ) 。两个模型在 C 乐队 VV， HH， VH，和 HV 瞄准单个极化的 SAR 图象。LUT 模型联系 H _s 到 _c , 当实验模型联系 H _s 到两 _c 和 SAR range-to-velocity () 。LUT 模型系数被模拟在不同的海状态下面导出，观察条件，取决于发生角度，挥动方向(d _w ), 并且但是独立于极化。实验模型系数被适合并置的数据获得，它仅仅取决于极化。适合实验模型系数并且验证二个模型， C 乐队 RADARSAT-2 好空铅极化(VV+HH+VH+HV ) 单个看的建筑群(SLC ) SAR 图象和并置的浮标数据被收集。检索 H _{用杨模型和二个模型的 s} , 从四种极化 SAR 数据在这份报纸求婚了，与浮标 H _s 。结果证明 LUT 和实验模型有检索 H _{从 C 乐队 RADARSAT-2 合作极化 SAR 数据的 s} ，当杨模型不对这些种 SAR 数据合适时。而且，实验模型为显示出清楚的海浪条纹的跨极化的 SAR 数据也是有效的。

英文摘要：

This paper proposes two simple models, look-up table（LUT） model and empirical model, to directly retrieve significant wave height（Hs） using synthetic aperture radar（SAR） azimuth cutoff（λc）. Both models aim at C-band VV, HH, VH, and HV single-polarization SAR images. The LUT model relates Hs to λc, while the empirical model relates Hs to both λc and SAR range-to-velocity（β）. The LUT model coefficients are derived by simulation under different sea states and observation conditions, which depend on incidence angle（θ）, wave direction（dw）, and βbut are independent of polarization. The empirical model coefficients are obtained by fitting the collocated data,which only depend on polarization. To fit empirical model coefficients and validate the two models, C-band RADARSAT-2 fine quad-polarization（VV＋HH＋VH＋HV） single-look complex（SLC） SAR images and collocated buoy data are collected. Retrieved Hs, using Yang model and the two models proposed in this paper from four kinds of polarization SAR data, are compared with buoy Hs. Results show that both LUT and empirical models have the capacity of retrieving Hs from C-band RADARSAT-2 co-polarization SAR data, while Yang model is not suitable for these kinds of SAR data. Moreover, the empirical model is also valid for cross-polarization SAR data showing clear ocean wave stripes.