*3.1. Responses of Satellite Broadband Reflectance to MTA*

For illustration, the responses of individual broadband reflectance bands to MTA from PROSAIL model simulations are presented at four combinations of high and low LAI and Cab in Figure 3. At two low LAI conditions (LAI = 1), reflectance in the NIR region had a strong negative correlation with MTA for all the satellites. At the same time, MTA presented a medium to strong negative correlation with reflectance in the red edge depending on the satellite sensors. In the visible region, MTA had little effect on reflectance when Cab was high (Cab = 90). At two high LAI conditions (LAI = 5), MTA presented strong negative correlations with reflectance in NIR, and this correlation was enhanced when MTA varied between 60 and 70◦. The determination coefficients between CCC, MTA and individual band reflectance using field-measured and model-simulated datasets were presented in Table A1. Generally, the bands with the strongest correlation to CCC appeared in visible regions, and those with the strongest correlations to MTA appeared in red edge and NIR regions.

**Figure 3.** *Cont*.

**Figure 3.** Responses of satellite broadband reflectance to leaf mean tilt angle (MTA) from PROSAIL model simulation for four combinations of high and low LAI and Cab: low LAI and low Cab (**left column**), low LAI and high Cab (**second column**), high LAI and low Cab (**third column**) and high LAI and high Cab (**right column**) for Sentinel-2 (**top row**), WorldView-2 (**second row**), RapidEye (**third row**), and GeoFen-6 (**bottom row**).
