| Concept definition: |
The ratio, for a particular material <SURFACE>, of the differential reflected <<RADIANCE>> into a unit solid angle about a particular (reflected) <DIRECTION> to the differential incident flux per unit surface <<AREA>> (irradiance) from a particular (incident) <DIRECTION>; integrated bidirectional reflectance distribution function. This quantity, which is also known as integrated directional-directional reflectance, is a function of the incident and reflected zenith and azimuth angles. This quantity is <<WAVELENGTH>>-band integrated, and the particular band is specified separately. |
