A semiempirical algorithm for SAR wave height retrieval and its validation using Envisat ASAR wave mode data

作     者：WANG He ZHU Jianhua YANG Jingsong SHI Chaoying 

作者机构：National Ocean Technology CenterState Oceanic AdministrationTianjin 300112China State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of OceanographyState Oceanic AdministrationHangzhou 310012China National Center of Ocean Standard and MetrologyState Oceanic AdministrationTianjin 300112China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2012年第31卷第3期

页      面：59-66页

核心收录：

学科分类：07[理学] 

基　　金：The Ocean Science Youth Fund of State Oceanic Administration of China under contract No.2010418 the fund of State Administration for Science,Technology and Industry for National Defense the Open Fund of State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,State Oceanic Administration of China under contract No.SOED1010 

主　　题：significant wave height SAR retrieval validation 

摘      要：Many synthetic aperture radar (SAR) wave height retrieval algorithms have been ***,the wave height retrievals from most existing methods either depend on other input as the first guess or are restricted to the long wave regime.A semiempirical algorithm is presented,which has the objective to estimate the wave height from SAR imagery without any prior *** proposed novel algorithm was developed based on the theoretical SAR ocean wave imaging mechanism and the empirical relation between two types of wave *** dependency of the proposed model on radar incident and wave direction was *** Envisat advanced synthetic aperture radar (ASAR) wave mode data,the model can be reduced to the simple form with two input parameters,i.e.,the cutoff wavelength and peak wavelength of ocean wave,which can be retrieved from SAR imagery without any prior knowledge of wind or *** Envisat ASAR wave mode data and the collocated buoy measurements from NDBC,the scmicmpirical algorithm is validated and compared with the Envisat ASAR level 2 *** root-mean-square-error (RMSE) and scatter index (SI) in respect to the in situ measurements are 0.52 m and 19％ *** results indicate that,for Envisat ASAR wave mode data,the proposed method works well.