Improved method of ultraviolet radiation reflection measurement for non-horizontal urban surfaces

The technique of ultraviolet reflection ratio measurement is modified from the traditional albedo measurement in order to compensate for unusual inflation of the reflection ratio found previously in non-horizontal surface ultraviolet reflection studies. Data collected to test this method of reflection ratio collection shows there is significant reduction in the inflation. In order to collect UV reflection ratio data on non-horizontal surfaces that can be comparable to differently oriented planar surfaces, the sun and the sensor’s positions during the measurement process are equally important, which leads to this new method of reflection measurement for non-horizontal surfaces.