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Evaluation of VIIRS ocean color data using measurements from the AERONET-OC sites

机译:使用AERONET-OC站点的测量值对VIIRS海洋颜色数据进行评估

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As an integral part of the VIIRS sensor calibration and validation efforts, our group has been continuously monitoring the validity of the Visible Infrared Imager Radiometer Suite (VIIRS)'s Ocean Color (OC) and atmospheric data stream through time series in-situ data acquired at the observatory sites which are part of the AERONET - OC network. This paper addresses the preliminary evaluations of the VIIRS sensor's performance for retrieving OC data of typical coastal water environments, by carrying out time-series, as well as qualitative and quantitative match-up comparisons analysis between in-situ and satellite retrieved OC data. Initial time-series match-up comparisons carried out for almost a year period (January to December, 2012) show that VIIRS data exhibits strong temporal and statistical agreements with AERONET-OC data demonstrating a potential for enhanced coastal water monitoring from space. VIIRS data processing schemes which apply different vicarious calibration gains are compared and analyzed based on AERONET-OC data as well as OC retrievals of the Moderate Resolution Imaging Spectro-radiometer (MODIS) sensor aboard the Aqua satellite. The underlying cause of the discrepancies observed in VIIRS retrieved normalized water-leaving radiances is also investigated.
机译:作为VIIRS传感器校准和验证工作不可或缺的一部分,我们小组一直通过获取的时间序列原位数据,持续监控可见红外成像仪辐射仪套件(VIIRS)的海洋颜色(OC)和大气数据流的有效性在AERONET-OC网络的天文台站点中。本文通过对时间序列以及原位和卫星获取的OC数据之间的时间序列以及定性和定量匹配比较分析,对VIIRS传感器对典型沿海水环境的OC数据的性能进行了初步评估。在将近一年的时间(2012年1月至2012年12月)中进行的初始时间序列对位比较显示,VIIRS数据与AERONET-OC数据显示出强烈的时间和统计一致性,证明了从太空进行沿海水域监测的潜力。根据AERONET-OC数据以及Aqua卫星上中分辨率成像光谱辐射计(MODIS)传感器的OC检索,对应用了不同替代校准增益的VIIRS数据处理方案进行了比较和分析。还研究了在VIIRS中检索到的归一化留水辐射率出现差异的根本原因。

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