Short Description
Calculate a standardised optical surface reflectance using robust physical models to correct for variations in image radiance values due to atmospheric properties, sun and sensor geometry as well as the directional reflectance properties of the surface being observed.
The process of producing standardised optical surface reflectance is known as Nadir corrected Bi-directional reflectance distribution function Adjusted Reflectance (NBAR).
This enables comparison of imagery acquired at different times, in different seasons and in different geographic locations.
Algorithm details can be found here: https://doi.org/10.1109/JSTARS.2010.2042281