مقياس العاكسية

alt=SRA30 albedometer consisting of 2 pyranometers|thumb|Typical albedometer consisting of two pyranometers, model SRA30. An albedometer is an instrument used to measure the albedo (reflecting radiation) of a surface. An albedometer is mostly used to measure the reflectance of earths surface. It is also useful to evaluate thermal effects in buildings and generation capacity with bifacial solar photovoltaic panels. Often it consists of two pyranometers: one facing up towards the sky and one facing down towards the surface. From the ratio of incoming and reflecting radiation the albedo can be ca