Total Sky Imager observations during POLARSTERN cruise PS122/5 on 2020-08-18

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.本数据集收录天空视角的拍摄影像。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）科考船顶部。在从朗伊尔城（Longyearbyen）前往北冰洋的MOSAIC实验第四航段（2020年6月至8月）中，该相机以1分16秒的时间分辨率采集影像。本数据集呈现了极星号科考船上朝向天顶（zenith）附近方向记录的气象状况与云量的可见光成像结果。此类观测数据可用于辅助大气辐射测量结果的解译工作。