HAPEX-Sahel: the Hydrology-Atmosphere Pilot Experiment in the Sahel,
(The following text is an extract of : Geographical, biological and
remote sensing aspects of the Hydrologic Atmospheric ...
The data set consists of bidirectional reflectance values derived from
radiance measurements from one of the visible channels of AVHRR and
channel 20 of the HIRS/2 instrument for a cloud-free atmosphere ...