Solar masks at Col de Porte, France

Two masks (up and down) are given (in ° above horizon), as a function of solar azimuth (0 is true North). Between mask up and mask down, only a fraction (percentage) of the direct solar radiation reaches the ground. Below the mask down elevation angle, 100% of the direct solar radiation is cut. See further details for a plot of solar masks.本数据集提供两组太阳遮挡板（上遮挡板与下遮挡板），其参数以太阳方位角（solar azimuth）为自变量，单位为地平线以上的角度（°）；当太阳方位角为0时，代表朝向真北（true North）。在上下遮挡板对应的仰角区间内，仅有一定比例的直射太阳辐射（direct solar radiation）可抵达地面。当太阳仰角低于下遮挡板的仰角时，全部直射太阳辐射均被完全遮挡。如需了解太阳遮挡板的相关图示，请参阅更多细节说明。