Fluxes scintillometer

摘要

A laser scintillometer measures the variance of the log intensity of diverged laser light received via a first path. A large aperture scintillometer measures the variance of the log intensity of light from an incoherently illuminated source received via a second path. The ratio of the two measured variances gives the inner scale of turbulence. The refractive-index structure parameter is derived from either measured variance and the inner scale. A processor then derives values of fluxes, such as heat flux and momentum flux, from the refractive-index structure parameter and the inner scale of turbulence using Monin-Obukhov similarity relationships.