雷达学报2026，Vol.15Issue(2)：746-758,13.DOI:10.12000/JR25146
基于高分三号SAR图像的海面起伏场准线性反演
A Quasi-linear Inversion Algorithm for Retrieving Sea Surface Elevation from GF-3 SAR Images
摘要
Abstract
Sea surface elevation is crucial for characterizing individual waves,wave groups,and freak waves,offering an accurate representation of inhomogeneous sea states.This study presents a quasi-linear inversion strategy for retrieving sea surface elevation from GF-3 Synthetic Aperture Radar(SAR)images.The algorithm enables rapid inversion within 10 s per scene without the need for external data and effectively resolves range-traveling waves.Case studies conducted under three distinct sea states demonstrate its ability to extract maximum wave heights and identify wave groups.Additionally,inversion results from 2405 GF-3 wave mode SAR images following quality control are compared with ERA5 reanalysis spectra and altimeter data.The comparisons reveal that the retrieved Significant Wave Height(SWH)has a root mean square error of 0.48 m compared with ERA5 data.In low-to-moderate sea states,with significant wave heights below 3 m,the retrieved SWH shows strong consistency with ERA5 spectra and altimeter measurements.This algorithm serves as an effective tool for rapid monitoring and analysis of sea states using GF-3 SAR.关键词
合成孔径雷达/高分三号/海面起伏场/准线性模型/快速反演Key words
Synthetic Aperture Radar(SAR)/GF-3/Sea surface elevation/Quasi-linear model/Rapid inversion分类
信息技术与安全科学引用本文复制引用
房玉鑫,范陈清,孟俊敏,张杰,闫秋双..基于高分三号SAR图像的海面起伏场准线性反演[J].雷达学报,2026,15(2):746-758,13.基金项目
国家自然科学基金(42206178)The National Natural Science Foundation of China(42206178) （42206178）
