TRANSPORTABLE GONIOSPECTROMETER WITH CONSTANT OBSERVATION CENTRE

摘要

Known goniospectrometers for the radiometric measurement of the reflexion behaviour, more particularly the anisotropic radiance, of a natural surface under insolation are relatively complicated to transport and adjust. The goniospectrometer (01) according to the invention comprises on a cantilever (03) a rotatable and fixable suspension (04), which is connected to a fixed arc end (054), the other arc end being embodied as a free arc end (055). The suspension positions the arc (05) at the distance of the arc radius (BR) thereof above the natural surface (SF). A displaceable and fixable slide (06) carrying an optical unit (131) is arranged along the arc (05). By rotating the arc (05) about the suspension (04) and displacing the slide (06) along the arc (05), it is possible to position the optical unit (131) at any point on the spherical shell spanned. Measurements can be performed at arbitrary viewing angles and correlated with the measurements of a satellite (EnMAP) that can be pivoted in terms of the observation direction thereof. The correct anisotropic radiance of natural surfaces can thus be determined and used for the evaluation of ground properties, for example biomass that occurs or mineral resources that occur.