Computes bidirectional reflectance factor based on outputs from PRO-4SAIL and sun position

Authors of the version:Jean-Baptiste FERET (jb.feret@teledetection.fr) Florian de BOISSIEU (fdeboiss@gmail.com) Copyright 2019/11 Jean-Baptiste FERET

Usage

Compute_BRF(
  rdot = NULL,
  rsot = NULL,
  tts = NULL,
  data.light = NULL,
  short.waves = T
)

Arguments

rdot

numeric. Hemispherical-directional reflectance factor in viewing direction

rsot

numeric. Bi-directional reflectance factor

tts

numeric. Solar zenith angle

data.light

list. direct and diffuse radiation for clear conditions, is NULL use default values

short.waves

boolean . Is true the outputs is shorted to wave for Fluspect-model.

Value

BRF numeric. Bidirectional reflectance factor

Details

The direct and diffuse light are taken into account as proposed by: Francois et al. (2002) Conversion of 400-1100 nm vegetation albedo measurements into total shortwave broadband albedo using a canopy radiative transfer model, Agronomie

Es = direct Ed = diffuse