Abstract
The albedo of active surfaces, such as soil, plant cover, or anthropogenic objects, is one of the most important components of the Earth's energy balance. It is most often determined based on satellite data; however, such data are characterized by relatively low resolution, and the possibility of acquisition is limited to cloudless days. The development of the UAV technology offers new possibilities of albedo measurement. In this study, an attempt was made to use a UAV equipped with a standard RGB sensor for albedo mapping. The results of the measurements and calculations were compared with Sentinel-2 and Landsat 8 satellite data. It has been shown that the commonly used and readily available UAVs can be applied for mapping the broadband albedo of the active surface with the use of appropriate validation algorithms developed by direct measurements on the ground with a precise high spectral resolution spectroradiometer. The quality of collected results can be improved using different conversion algorithms for the individual phases of the growing season.
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