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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >An autonomous above-water system for the validation of ocean color radiance data
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An autonomous above-water system for the validation of ocean color radiance data

机译：自主的水上系统，用于验证海洋颜色辐射数据

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An operational system for autonomous above-water radiance measurements, called the SeaWiFS Photometer Revision for Incident Surface Measurements (SeaPRISM), was deployed at the Acqua Alta Oceanographic Tower in the northern Adriatic Sea and used for the validation of remote sensing radiometric products in coastal waters. The SeaPRISM data were compared with simultaneous data collected from an independent in-water system for a wide variety of sun elevations along with different atmospheric, seawater, and sea state conditions. The average absolute differences between the above- and in-water determinations of water-leaving radiances (computed linearly) were less than 4.5% in the 412-555-nm spectral interval. A similar comparison for normalized water-leaving radiances showed average absolute differences less than 5.1%. The comparison between normalized water-leaving radiances computed from remote sensing and SeaPRISM matchup data, showed absolute spectral average (linear) differences of 17.0%, 22.1%, and 20.8% for SeaWiFS, MODIS, and MERIS, respectively. The results, in keeping with those produced by independent in-water systems, suggest the feasibility of operational coastal networks of autonomous above-water radiometers deployed on fixed platforms (towers, lighthouses, navigation aids, etc.) to support ocean color validation activities.
机译：在亚得里亚海北部的Acqua Alta海洋学塔中部署了一个用于自主水上辐射率测量的操作系统，即“用于入射表面测量的SeaWiFS光度计修订版（SeaPRISM）”，用于验证沿海水域的遥感辐射测量产品。将SeaPRISM数据与从独立的水中系统收集的同时数据进行了比较，这些数据涉及各种海拔高度，不同的大气，海水和海况条件。在412-555nm的光谱区间中，水上辐射率的上下测量值和水中测定值（线性计算）之间的平均绝对差小于4.5％。标准化的留水辐射率的类似比较显示平均绝对差值小于5.1％。通过遥感和SeaPRISM匹配数据计算出的归一化放水辐射率的比较显示，SeaWiFS，MODIS和MERIS的绝对光谱平均（线性）差异分别为17.0％，22.1％和20.8％。结果与独立的水中系统产生的结果一致，表明在固定平台（塔，灯塔，助航设备等）上部署自主水上辐射计的沿海沿海网络以支持海洋颜色验证活动的可行性。

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