TLS-uncertainty reflectivity modeling data

Hence, a reflection model was developed which includes the a combination of both diffuse as well as specular components. For this, the experiments were performed in our Geodetic Metrology lab to scan a target plate of concrete material, a target plate of wooden material, and an aluminium material plate acquired at 10 m with varying angles of incidence (from 0 degrees to 65 degrees).

In addition, the concrete material plate was scanned at varying distance (2.5 m, 5 m, and 7.5 m) to understand the dependence of the intensities values obtained (from the scanner) as a function of increasing distance. The intensity values obtained for each material scan were used to fit a curve using Gauss-Markov parameter estimation approach where the unknown parameters were the specular and the diffuse components coefficients.