A speckle noise suppression method based on surface waves investigation and monitoring data

作     者：Jingwei Gu Xiuzhong Li Yijun He Jingwei Gu;Xiuzhong Li;Yijun He

作者机构：School of Marine SciencesNanjing University of Information Science&TechnologyNanjing210044China 

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

年 卷 期：2023年第42卷第1期

页      面：131-141页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 0707[理学-海洋科学] 08[工学] 0816[工学-测绘科学与技术] 

基　　金：NCEP National Data Buoy Center National Satellite Ocean Application Service Nanjing University of Information Science and Technology, NUIST 

主　　题：speckle noise surface waves investigation and monitoring WaveWatch III wave spectra 

摘      要：The internal energy distribution of waves can be described using ocean-wave *** many ways,obtaining wave spectra on a global scale is *** waves investigation and monitoring onboard the Chinese-French oceanography satellite is the first space-borne instrument for detecting wave spectra specially,which was launched on October 29,*** can avoid the shortage of synthetic aperture radar detection results while still having some problems,especially with the effects of speckle *** this study,a method to suppress the speckle noise is ***,the empirical formula for background speckle noise is ***,many spatio-temporal representative fluctuation spectra are classified and ***,rational transfer function filtering is used to obtain speckle noise close to the along-track ***,a signal-to-noise ratio threshold is used to suppress the abnormal speckle *** method solves the problems existing in previous denoising methods,such as excessive denoising in the along-track direction and the inability of some abnormal noises to be denoised in the two-dimensional directional wave spectra.