 This paper examined the intensity measurements taken with terrestrial laser scanners, TLS, and found that the range and incidence angle effects can be corrected for. The range effect was mostly due to instrumental factors, while the incidence angle effect was caused by the target's surface properties. These corrections could then be used to better characterize the target. More research is needed to understand these effects and develop more efficient ways to utilize the intensity data. This article was authored by Enterocucco, Mikko Kosselainen, Nancy Crooks, and others.