南海区域Aquarius遥感海表盐度V4产品精度探讨
发布时间：2018-09-06 13:35
【摘要】：Aquarius/SAC-D卫星,以实现海表盐度(sea surface salinity,SSS)全球遥感观测为目标,经过算法的不断改进,迄今已发布第4版产品(V4).已有的检验研究表明V1.3产品在全球最大的边缘海——中国南海的精度并未达到该产品的目标精度,主要原因是射频干扰(radio frequency interference,RFI)的影响.为探讨新版数据在中国南海的精度,通过比较南海走航盐度、Argo浮标盐度与Aquarius遥感SSS V4及旧版产品的差异,发现Aquarius遥感SSS V4与走航盐度及Argo浮标盐度的均方根误差(RMSE)分别为0.47和0.73,V4产品整体表现优于V3及之前的版本,特别是在南海北部近岸高RFI海域,V4产品的偏差也小于V3,说明V4产品中RFI的影响相较于V3产品在一定程度上得到了有效的去除.同时,分析表明Aquarius遥感SSS V4产品所揭示的南海SSS空间分布与季节变动特征,与前人通过实测调查获得的结论基本一致.
[Abstract]:Aquarius/SAC-D satellite, aiming at realizing the global remote sensing observation of sea surface salinity (SSS), has been published the 4th edition product (V4) by the continuous improvement of the algorithm. The existing test and research show that the accuracy of V1.3 product in the world's largest marginal sea, the South China Sea, has not reached the target precision of this product, the main reason is that In order to explore the accuracy of the new version of data in the South China Sea, the differences between Aquarius SSS V4 and Aquarius remote sensing SSS V4 and the old version of products were compared. It was found that the RMSE of Aquarius remote sensing SSS V4 was 0.47 compared with that of navigation salinity and Argo buoy salinity, respectively. And 0.73, the overall performance of V4 products is better than that of V3 and previous versions, especially in the high-RFI sea area near the northern coast of the South China Sea, and the deviation of V4 products is less than that of V3. This shows that the influence of RFI in V4 products is effectively removed to a certain extent compared with that of V3 products. The characteristics of seasonal variation are basically the same as those obtained by previous surveys.
【作者单位】： 水声通信与海洋信息技术教育部重点实验室(厦门大学);
【基金】：国家重点基础研究发展计划(973计划)(2009CB421201) 国家自然科学基金(J1210050)
【分类号】：P715.7
本文编号：2226501
[Abstract]:Aquarius/SAC-D satellite, aiming at realizing the global remote sensing observation of sea surface salinity (SSS), has been published the 4th edition product (V4) by the continuous improvement of the algorithm. The existing test and research show that the accuracy of V1.3 product in the world's largest marginal sea, the South China Sea, has not reached the target precision of this product, the main reason is that In order to explore the accuracy of the new version of data in the South China Sea, the differences between Aquarius SSS V4 and Aquarius remote sensing SSS V4 and the old version of products were compared. It was found that the RMSE of Aquarius remote sensing SSS V4 was 0.47 compared with that of navigation salinity and Argo buoy salinity, respectively. And 0.73, the overall performance of V4 products is better than that of V3 and previous versions, especially in the high-RFI sea area near the northern coast of the South China Sea, and the deviation of V4 products is less than that of V3. This shows that the influence of RFI in V4 products is effectively removed to a certain extent compared with that of V3 products. The characteristics of seasonal variation are basically the same as those obtained by previous surveys.
【作者单位】： 水声通信与海洋信息技术教育部重点实验室(厦门大学);
【基金】：国家重点基础研究发展计划(973计划)(2009CB421201) 国家自然科学基金(J1210050)
【分类号】：P715.7
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