Measurement: ftran

This is the total transmission of radiation passing - through a planar reference surface of specified lateral dimension and elevation above the target, and oriented perpendicular to the underlying surface normal - down through the canopy (direct and diffuse radiation) to reach the soil [%]. The ftran measurement always applies to the solar illumination conditions that are specified in the experiment description of the test case in question (so far this means a single solar zenith angle only).

Formatting of measurement-file content

where

• one single value per file;
• A real is defined as having 6 digits after the decimal point, e.g., 1.000000.

Example of a correctly formatted file

70.123456

Prior to the performing of any RT model simulations, please refer to the Radiative transfer simulation definitions page located under the ROMC Info menu in the top navigation bar. Here you may find detailed instructions regarding the angular sign conventions for BRF simulations, as well as precise definitions of the required leaf normal distributions, the location and extend of the reference plane and other RT model technicalities. Also read the relevant file naming and formatting conventions that must be adhered to in order to avoid rejection of your results by the ROMC format checker.
Further information may also be found in the FAQs.