The spectral (UV, VIS, NIR) optical properties of 17 materials similar to lunar and asteroidal regoliths in terms of the parameters of Hapke's photometric function

Abstract

Modern multispectral remote sensing techniques provide information about the spectral and the angle dependency of the reflected solar radiation of planetary surfaces. With the DLR-Goniospectrometer it is possible to simulate the remote sensing scenario and to investi- gate the spectral and optical scattering properties of materials similar to planetary regoliths. Comparison of such laboratory data with remote sensing data is then performed in terms of the spectral parameters of Hapke's photometric function. The analysis of the spectral Hapke-parameters of 17 materials in the UV, VIS and NIR and comparison of these datasets with remote sensing data of the lunar surface and the asteroid Gaspra gives insights intoscattering mechanisms. It thus shows that scattering depends on the microstructure of the different materials and that the Hapke-functionallows to compare spectrophotometric remote sensing data with laboratory data quantitatively.