Characterization and absolute calibration of an AERONET-OC radiometer.
Characterization and absolute calibration of an AERONET-OC radiometer.
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DOI：
10.1364/ao.419766
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发表时间：
2021-04-20
期刊：
影响因子：
1.9
通讯作者：
Yoon HW
中科院分区：
文献类型：
--
作者：
Johnson BC;Zibordi G;Brown SW;Feinholz ME;Sorokin MG;Slutsker I;Woodward JT;Yoon HW
全球气溶胶机器人网络 (AERONET-OC) 的海洋颜色组件采用经过改造的 CE-318 太阳光度计，用于从固定结构（如石油钻井平台、灯塔和服务平台）进行水上辐射测量。主要是，AERONET-OC 测量可以确定验证海洋颜色卫星数据产品所需的离水辐射率。本工作研究了 AERONET-OC 网络中的一台仪器（编号为 AERONET #080）。已知辐射率的激光照明积分球能够确定 AERONET #080 滤光带 7 个波长范围内的多个波长处的通量线性度和绝对辐射响应度。我们将结果与美国国家航空航天局戈达德太空飞行中心的 AERONET 设施以及欧盟委员会联合研究中心的校准结果进行了比较。这些结果与估计的平均比较不确定性 1.88% (k = 2) 一致。我们还使用校准的灯照明积分球评估了这些结果，并观察到了无法解释的比较结果的光谱依赖性。
The Ocean Color component of the global Aerosol Robotic Network (AERONET-OC) utilizes CE-318 sun photometers modified for above-water radiometry from fixed structures such as oil rigs, lighthouses and service platforms. Primarily, AERONET-OC measurements allow determination of the water-leaving radiance required for the validation of ocean color satellite data products. One instrument from the AERONET-OC network, identified as AERONET #080, was studied in this work. A laser-illuminated integrating sphere of known radiance enabled determination of the linearity with flux and absolute radiance responsivity at multiple wavelengths within 7 of the AERONET #080 filter bands. We compared the results to calibrations from the AERONET facility at the Goddard Space Flight Center of the National Aeronautics and Space Administration and from the Joint Research Centre of the European Commission. These results agree within the estimated mean comparison uncertainty of 1.88 % (k = 2). We also assessed these results using calibrated lamp-illuminated integrating spheres and observed a spectral dependence to the comparison results that is unexplained.