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《Science of Surveying and Mapping》 2015-06
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Study on the methods of coastal altimetry waveform classification and discrimination

ZHOU Hao;SHEN Jia;YANG Zheng-yin;WANG Hai-hong;Sichuan Provincial Remote Sensing Geomatics Institute;School of Geodesy and Geomatics,Wuhan University;Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan University;  
In view of low availability of altimetry data in coast and limitation of traditional waveform retrackers,a waveform classification scheme based on dynamic cluster analysis and the discrimination method based on moving minimum distance were presented,meanwhile the validity index for determining the optimal cluster number was introduced.The method realized the recognition of ocean waveform and non-ocean waveform correctly,and provided convenience to process mass altimetry data and study the best algorithm in accordance with waveforms.The experiment was implemented with the samples of coastal Topex/Poseidon waveforms over Taiwan Strait and coastal zones.The results showed that best clustering performance could be achieved when the wave forms were divided into three categories of ocean waveform,peaky waveform and the other scattering waveform.Compared with the traditional classification methods such as OCOG,moving correlation coefficient and beta-5,the new method was significantly improved.
【Fund】: 国家自然科学基金项目(41174021);; 数字制图与国土信息应用工程国家测绘地理信息局重点实验室开放研究基金资助项目(DM2013SC11)
【CateGory Index】: P228.3
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