近海卫星测高波形分类与判别
Study on the methods of coastal altimetry waveform classification and discrimination
周浩 1谌佳 1杨正银 1汪海洪2
作者信息
- 1. 四川省遥感信息测绘院,成都610100
- 2. 武汉大学测绘学院,武汉430079;武汉大学地球空间环境与大地测量教育部重点实验室,武汉430079
- 折叠
摘要
针对近海测高数据可用率低下以及传统重跟踪技术的局限性,该文提出了基于动态聚类分析的测高波形分类方法以及基于移动最小距离的波形判别方法,并给出了确定最佳分类数的有效性指标.实现了海洋波形与非海洋波形正确识别,为处理海量测高波形以及根据波形研究最佳重跟踪算法提供了便利.以穿过台湾海峡和台湾近岸的TOPEX/Poseidon波形数据为例进行试验,结果表明,测高波形分为海洋波形、尖锥波形和其他散射波形3类时聚类效果最佳.与OCOG、移动相关系数和β-5等方法的分类结果对比分析表明,本文提出的方法具有一定优势.
Abstract
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.
关键词
卫星测高/近海/波形分类/波形判别Key words
altimetry/coast/waveform classification/waveform discrimination引用本文复制引用
基金项目
国家自然科学基金(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(DM2013SC11)
出版年
2015
NETL
NSTL
维普
万方数据