SupportGlossary Optical Processes & Properties 


Propagating upward (vs downwelling).  Originally referring to the physical transport of water, it also applies to light quantities, for example upwelling radiance (Lu).


Note that light collectors must be pointed in the direction opposite to the direction of the light they measure, so an "upwelling" light collector points down.

Copyright © 1998-2019 by Hydro-Optics, Biology, & Instrumentation Laboratories All rights reserved.
All specifications subject to change without notice.