WSI: calibrated red or clear quicklook movies (MPEG), 2-min intervals - 02wsipartradmpg

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）是一款用于评估与记录云系及其动力学特性的自动化成像设备。该设备属于地基电子成像系统，用于监测上空半球空域。它是无源（非发射型）系统，通过中性、红色与蓝色三种光谱滤光片采集天穹的图像。

依托此类天空图像，研究人员可借助自动化云判定算法及配套处理流程，对全天域范围内云的存在性、分布状态、形态特征与辐射亮度进行评估。当前主流的WSI型号为EO System 6，可在日光、月光及星光条件下完成图像采集。