WSI: radiances from red image for three patches (avg and SD) - wsipatchsummary

The whole-sky imager (WSI) is an automated imager used for assessing and documenting cloud fields and cloud field dynamics. The WSI is a ground-based electronic imaging system that monitors the upper hemisphere. It is a passive, i.e., non-emissive, system that acquires images of the sky dome through three spectral filters (neutral, red, and blue). \n \nFrom these sky images, we can assess the presence, distribution, shape, and radiance of clouds over the entire sky using automated cloud decision algorithms and related processing. The current WSI model (EO System 6) is capable of image acquisition under daylight, moonlight, and starlight conditions.

全天空成像仪（Whole-sky imager, WSI）是一款用于评估并记录云场及其动态变化的自动化成像设备。该设备为地基电子成像系统，用于监测上半球空域，属于被动（非主动发射）系统，通过中性、红色、蓝色三类光谱滤光片采集天空穹顶的图像。

依托此类天空图像，我们可借助自动化云判定算法及相关处理流程，对全天空域内云的存在状态、分布特征、形态结构与辐亮度进行评估。当前的WSI型号（EO System 6）可在日光、月光与星光条件下完成图像采集。