HY-2A卫星高度计不同重跟踪方案对反演海浪有效波高的影响

李秀仲; 何宜军; 赵海峰

doi:10.3969/j.issn.0253-4193.2014.07.006

HY-2A卫星高度计不同重跟踪方案对反演海浪有效波高的影响

doi: 10.3969/j.issn.0253-4193.2014.07.006

1.
南京信息工程大学海洋科学学院, 江苏南京 210044
2.
江苏省地质测绘院, 江苏南京 210008

基金项目: 国家自然科学基金——小入射角雷达海浪和风速遥感方法基础研究（41076119）；江苏省自然科学基金项目——卫星海浪波谱仪的遥感信息提取方法及其验证方法研究（BK2011008）；江苏省高等教育优势学科项目；江苏省研究生培养创新工程项目——海浪波谱仪遥感方法若干问题研究（CXZZ13_0523）。

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出版历程
- 收稿日期: 2013-04-02
- 修回日期: 2014-03-10

Effects of different retracking schemes of HY-2A Altimeter on significant wave height

1.
Nanjing University of Science Information and Technology, Nanjing 210044, China
2.
Geological Surveying and Mapping Institute of Jiangsu Province, Nanjing 210008, China

摘要

摘要:
本文基于Amarouche的二阶理论回波模型，导出了带有偏度系数的二阶理论回波模型；针对HY-2A卫星高度计波形特点，引入了奇异值分解滤波，并根据最大似然估计算法反演参数的不同得到6种重跟踪方案；利用其中的五参数方案处理该波形数据，获得海面散射点高度概率密度函数中偏度的合理取值为0.15；将结果分别与浮标、Jason-1和HY-2A IDR有效波高对比，分析6种方案反演有效波高的准确度，确定了MLE4_SVD（波形重跟踪之前进行滤波）对HY-2A 高度计重跟踪更适合反演有效波高。
- 重跟踪 /
- 理论回波模型 /
- 偏度系数 /
- 奇异值分解滤波 /
- 有效波高
Abstract:
Adding skewness, a new second order echo model was derived according to the one of Amarouche. With respect to characteristics of HY-2A altimeter waveforms, six retracking schemes were derived with singular value decomposition filtering and different parameters wanted based on maximum likelihood estimation; After processing the data with five-parameter scheme, the proper skewness of elevation probability distribution function of scattering points was 0.15. According to comparisons between significant wave height from the six schemes and that from buoy, Jason-1 and HY-2A IDR, the accuracy of the schemes were analyzed, and the scheme MLE4_SVD (singular value decomposition filtering is conducted before retracking) was the better one for retrieving significant wave height from HY-2A altimeter retracking.
- retracking /
- theoretical echo model /
- skewness /
- singular value decomposition filter /
- significant wave height

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参考文献(18)

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