Reflectivity
From Glossary of Meteorology
reflectivity
Often the ratio of any reflected to incident irradiance.
This term is sometimes qualified, as in bidirectional (or biangular) reflectivity, meaning the ratio of reflected radiance (in a particular direction) to the incident radiance (in a particular direction).
See also reflection coefficient, radar reflectivity, radar reflectivity factor.
See also reflection coefficient, radar reflectivity, radar reflectivity factor.