Total Sky Imager observations during POLARSTERN cruise PS122/5 on 2020-09-21@en

The dataset consist of camera shots of the sky. The camera - a total sky imager manufactured by Canon (Powershot) - was mounted at the top of the Research Vessel Polarstern. At the leg4 (from June until August 2020) of the MOSAIC experiment from Longyearbyen - Arctic Ocean this camera shots were taken with a temporal resolution between 1 minute and 16 seconds. The dataset represents the visible projection of weather conditions and cloud cover recorded on the vessel Polarstern in the direction near the zenith. These observations are useful for the interpretation of the atmospheric radiation measurements.本数据集收录了天空场景的相机拍摄影像。所用相机为佳能（Canon）PowerShot系列全天空成像仪（total sky imager），安装于极星号（Polarstern）科考船的顶部。该影像采集自MOSAIC科考实验的第4航段（2020年6月至8月），航段起点为朗伊尔城，作业海域覆盖北冰洋。影像的时间分辨率介于1分钟至16秒之间。本数据集呈现了极星号科考船上朝向近天顶方向拍摄的可见光影像，用以反映当时的天气状况与云量覆盖情况。该观测数据可用于辅助大气辐射测量结果的解读。