Measurement: fabs

This is the percentage of radiation entering the canopy via the reference plane at the top-of-canopy, that has been absorbed by the scatterers in the scene, where scatterers refers to all objects (turbid or discrete) that are associated with foliage elements in the scene - thus excluding the underlying background (soil) and any other contextual objects, like man-made structures, wood, or rocks.

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

78.654321

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.