Spectral BRDF of common urban materials

The spectral BRDF of various common urban materials has been measured for the purposes of facilitating the further development of remote sensing in urban scenes. It is seen that the usual assumption of lambertian surfaces only hold for highly rough surfaces. For smooth manmade materials, the point of specularity not only has a higher magnitude, but could also differ in spectral shape from reflections at other angles. In terms of correcting for secondary irradiance for purposes of reflectance retrieval, which in turn allows material identification and improved scene classification, assuming a lambertian assumption for these materials would not be adequate. The collected data has been placed in the MEMOIRES database belonging to ONERA.