Abstract. The advanced baseline imager (ABI) instrument onboard Geostationary Operational Environmental Satellite (GOES)-16 is the first of National Oceanic and Atmospheric Administration (NOAA’s) new-generation geostationary earth orbiting (GEO) imagers that provides high-quality calibrated and geolocated Earth observations in six reflective solar bands (RSBs). The spectral similarity between the Visible Infrared Imaging Radiometer Suite (VIIRS) and ABI RSB offers an opportunity for deriving VIIRS-quality cloud retrievals from the ABI radiances. NASA’s Clouds and the Earth’s Radiant Energy System (CERES) project utilizes GEO imager (including ABI) radiances to retrieve clouds and derive broadband fluxes that are used to account for the regional diurnal flux variation between the CERES measurements and to convert the CERES observed radiances into fluxes. In order to derive a seamless cloud and flux datasets for CERES, it is important that the GEO, MODIS, and VIIRS imagers are all placed on the same radiometric scale. We describe an absolute radiometric intercomparison between the NOAA-20 VIIRS and GOES-16 ABI RSB using ray-matched radiance/reflectance pairs over all-sky tropical ocean scenes as well as a deep convective cloud invariant target calibration algorithm. Results indicate that the ABI and VIIRS RSB calibration are within 5%, except for the 0.47-μm band, for which the radiometric inconsistency is found to be ∼7 % . The GOES-16 radiometric scaling factors referenced to NOAA-20 VIIRS were computed from the two independent calibration methods to agree within 1% for ABI bands 1 to 4, and within 3% for bands 5 and 6. Results from this study were used to propose a future CERES GEO intercalibration algorithm referenced to NOAA-20 VIIRS, given the eventual demise of the Terra and Aqua satellites.

中文翻译：

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用于校准新一代地球静止可见光成像仪的云和地球辐射能系统策略

摘要。地球静止运行环境卫星 (GOES)-16 上的先进基线成像仪 (ABI) 仪器是美国国家海洋和大气管理局 (NOAA) 新一代地球静止轨道 (GEO) 成像仪中的第一款，可提供高质量的校准和地理定位地球观测在六个反射太阳波段 (RSB) 中。可见红外成像辐射计套件 (VIIRS) 和 ABI RSB 之间的光谱相似性为从 ABI 辐射度导出 VIIRS 质量的云检索提供了机会。NASA 的云和地球辐射能系统 (CERES) 项目利用 GEO 成像仪（包括 ABI）辐射来检索云并得出宽带通量，这些宽带通量用于解释 CERES 测量之间的区域日通量变化，并将 CERES 观测到的辐射转换为通量。为了获得 CERES 的无缝云和通量数据集，重要的是 GEO、MODIS 和 VIIRS 成像仪都放置在相同的辐射尺度上。我们描述了 NOAA-20 VIIRS 和 GOES-16 ABI RSB 之间的绝对辐射比对，使用全天空热带海洋场景中的光线匹配辐射/反射对以及深对流云不变目标校准算法。结果表明，除 0.47-μm 波段外，ABI 和 VIIRS RSB 校准在 5% 以内，发现其辐射不一致性约为 7%。参考 NOAA-20 VIIRS 的 GOES-16 辐射测量比例因子是根据两种独立的校准方法计算得出的，ABI 波段 1 到 4 的一致性在 1% 以内，波段 5 和 6 的一致性在 3% 以内。这项研究的结果用于考虑到 Terra 和 Aqua 卫星的最终消亡，提出了一种参考 NOAA-20 VIIRS 的未来 CERES GEO 相互校准算法。