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18-Jan-2022   
Path: RAMI-IV : EXPERIMENTS : ACTUAL CANOPIES : OFENPASS WINTER PINESTAND : Collided by canopy only transmission at lower boundary level for diffuse illumination only
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Collided by canopy only transmission at lower boundary level for diffuse illumination only: ftran_coco_iso

This is the fraction of the incident isotropic diffuse 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_iso does not include contributions from direct illumination sources (should they be prescribed in the illumination conditions of a given RAMI experiment).

ftran_bs_dir = transmission due to isotropically diffuse incident radiation that has one or more scattering interactions with the canopy only

Within RAMI-IV this measurement applies only to a selection of ACTUAL CANOPY scenes:

    Formatting of measurement-file content:

    Content ftran_coco_iso standard deviation of ftran_coco_iso*
    Format real real
    *: if not available set to −1.000000.

    A real is defined as having 6 digits after the decimal point, e.g., 1.000000.

    Example output:

    0.123456	-1.000000
    

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