Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > ANISOTROPY

Definition:
Anisotropy is the characteristic of a surface for which a physical
property, such as reflectivity, varies in value with the direction in or
along which the measurement is made.


Reference:
CEOS Glossary of Remote Sensing Terms
http://ceos.cnes.fr:8100/cdrom-00b2/ceos1/science/glossary/gloss.htm