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Radiometric calibration of the Visible Infrared Imaging Radiometer Suite reflective solar bands with robust characterizations and hybrid calibration coefficients

机译：具有鲁棒特性和混合校准系数的可见红外成像辐射计套件反射太阳波段的辐射校准

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The Visible Infrared Imaging Radiometer Suite (VIIRS) is now entering its fourth year of in-orbit global environmental observation and is producing a wide range of scientific output. The ocean color products in particular require a level of accuracy from the reflective solar bands (RSBs) that is a magnitude higher than the specification. In this work, we present an updated and completed core calibration pipeline that achieves the best sensor data records (SDR) to date and helps the ocean color products to reach maturity. We review the core calibration methodology of the RSBs and describe each essential input, including the solar diffuser stability monitor, the solar diffuser (SD), and lunar calibrations. Their associated issues, along with the successful mitigation and improved results, are described and presented. In particular, we illuminate the inaccuracy suffered due to the evolving angular dependence in the degradation of the on-board SD that impacts the heart of the RSB calibration, but also show that lunar-based calibration instead provides the correct long-term baseline for the successful restoration of the core methodology. The new look-up tables, which combine the coefficients from the SD-based and lunar-based calibrations, produce the optimal result, with an estimated accuracy of similar to 0.2%. This hybrid approach highlights significant progress in the VIIRS RSB calibration and marks a completion of the core calibration result upon which other physical impacts or scientific issues can then be more accurately examined. We demonstrate the significant improvement and its impact on the ocean color products by comparing the current official output to the newly generated result. Lastly, we point out that this hybrid calibration coefficients scheme is made possible by a VIIRS design and layout change over its predecessor, the Moderate Resolution Imaging Spectroradiometer, that allows both the SD and the moon to be viewed by the RSB at the same angle of incidence. Thus, this design element warrants serious consideration for other satellite sensors utilizing a similar calibration methodology. (C) 2015 Optical Society of America
机译：可见红外成像辐射计套件（VIIRS）现在已进入其在轨全球环境观测的第四年，并产生了广泛的科学成果。海洋色产品特别需要反射太阳能带（RSB）的精度等级，该精度等级要比规格高。在这项工作中，我们提出了一个更新和完整的岩心校准管道，该管道可以实现迄今为止最好的传感器数据记录（SDR），并帮助海洋色产品达到成熟。我们回顾了RSB的核心校准方法，并描述了每个基本输入，包括太阳扩散器稳定性监视器，太阳扩散器（SD）和月球校准。描述和介绍了与之相关的问题，以及成功的缓解措施和改进的结果。特别是，我们阐明了由于机载SD退化中不断变化的角度依赖性而产生的不精确性，从而影响了RSB校准的心脏，但同时也表明基于月球的校准可为RSB校准提供正确的长期基线成功地恢复了核心方法。新的查询表结合了基于SD和基于月球的校准的系数，可产生最佳结果，估计精度约为0.2％。这种混合方法突出了VIIRS RSB校准的重大进展，并标志着核心校准结果的完成，在此之后可以更准确地检查其他物理影响或科学问题。通过将当前官方输出与新生成的结果进行比较，我们证明了重大改进及其对海洋颜色产品的影响。最后，我们指出，通过VIIRS的设计和布局更改，可以实现此混合校准系数方案，它的前身是中分辨率成像光谱仪，它可以通过RSB以相同的角度观察SD和月球。发生率。因此，该设计元素值得认真考虑其他采用类似校准方法的卫星传感器。 （C）2015年美国眼镜学会

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