Abstract This paper presents the validation results of GOES-16 Satellite's Advanced Baseline Imager (ABI) obtained from a reflectance-based field campaign undertaken at the Salar de Uyuni in Bolivia in June 2017. In situ ground measurements are used to characterize the surface reflectance and the atmosphere in order to constrain the radiative transfer code and predict at-sensor reflectance (also referred to as top-of-atmosphere (TOA) reflectance) to compare with concurrent GOES-16 ABI measurements. The five-day field campaign provided repeated TOA reflectance estimates, allowing assessment not only of the calibration accuracy of the ABI reflective channels 1, 2, 3, 5 and 6, but also of its stability over the duration of the campaign. The results show that the accuracy of the ABI reflective channels calibration is within specification for channels 1, 3, 5, and 6 - average biases within 2%; for channel 2 the bias is 5%. The estimated uncertainty on the derived biases is 2–2.4%. Some calibration stability issues were present in the ABI calibration at the time of the campaign: (i) a jump on the order of 2% in channels 1 and 6, coincident with an ABI solar calibration event, reflects an instability of the ABI gains in these channels, and (ii) short-term variability in channels 1 and 2 is due to striping (ABI detector-to-detector calibration differences). Continued validation and subsequent reprocessing of ABI reflectance imagery would allow Earth scientists to fully benefit from the high spatial and spectral fidelity of the GOES-16 ABI diurnal measurements at the continental scale.

中文翻译：

---

用于地球科学应用的 GOES-16 ABI 太阳反射通道验证

摘要 本文介绍了 2017 年 6 月在玻利维亚乌尤尼盐沼开展的基于反射率的野外活动获得的 GOES-16 卫星高级基线成像仪 (ABI) 的验证结果。大气以约束辐射传输代码并预测传感器处反射率（也称为大气顶 (TOA) 反射率），以与同时进行的 GOES-16 ABI 测量进行比较。为期五天的现场活动提供了重复的 TOA 反射率估计，不仅可以评估 ABI 反射通道 1、2、3、5 和 6 的校准精度，还可以评估其在活动期间的稳定性。结果表明，ABI 反射通道校准的精度在通道 1、3、5 和 6 的规格范围内 - 平均偏差在 2% 以内；对于通道 2，偏差为 5%。衍生偏差的估计不确定性为 2-2.4%。在活动期间，ABI 校准中存在一些校准稳定性问题：(i) 通道 1 和 6 中出现 2% 数量级的跳跃，与 ABI 太阳校准事件同时发生，反映了 ABI 增益在这些通道，以及 (ii) 通道 1 和 2 的短期变化是由于条带化（ABI 检测器到检测器的校准差异）。ABI 反射率图像的持续验证和后续再处理将使地球科学家能够充分受益于 GOES-16 ABI 大陆尺度昼夜测量的高空间和光谱保真度。