Estimation of anisotropic radiance from a glacier surface - Ground based spectrometer measurements and satellite-derived reflectances

摘要: A glacier surface comprises mainly snow, firn and ice together with various transition features. Depending on the level of dirt content due to different physical characteristics materials, neighbouring patches a show distinct wavelength-dependent reflection patterns. Under ideal conditions, albedo can be calculated when both all incoming outgoing radiative fluxes from are measured. Here, simple groundbased nadir measurements reflected radiation were carried out Hintereis (Austria) using portable spectrometer. In situ compared values found in Landsat ETM+ image acquired preceding week. Radiometric, atmospheric topographic corrections performed image. Parameterised equations constructed estimate reflectance values.