Collided by canopy only transmission at lower boundary level for diffuse illumination only
This is the fraction of the incident direct radiation - passing through a planar reference surface of specified lateral dimension and elevation above the target, and oriented perpendicular to the underlying surface normal - that is intercepted by the canopy and scattered downward to the level of the background at z = ∼ 0. Radiation that is reflected back up from background surface before being intercepted by the canopy and scattered back down to the background again is thus counted only once (this is known as a black soil scenario).
ftran_coco = transmission due to direct incident radiation that has one or more scattering interactions with the canopy only.
This measure applies to all scene in RAMI-V and only the bands included in the Photosynthetically
Active Radiation (PAR) spectral region (400-700 nm). Hence in RAMI-V they are O03 (442.5nm), O04(490nm), O06(560nm), O08(665nm), O10(681.25nm).
Illumination to be considered are either direct illumination as defined in brfpp, as well as isotropic diffuse.
|standard deviation of ftran_coco estimate*||%.6f|
*: if available, otherwise set to −1.000000.