ISSUES OF USING THE SHORT-WAVE IR RANGE FOR HIGH- ALTITUDE ACTIVE AND PASSIVE REMOTE SENSING USING UAVS

Abstract

The article is dedicated to the analysis of the possibility of using the short-wavelength infrared range of the electromagnetic spectrum for remote sensing of the Earth's surface. For active and passive remote sensing of terrestrial objects, high-altitude UAVs equipped with IR radiometric equipment, an emitter, and a receiver can be used. In the case of relatively broadband active sensing, the influence of water vapor can be accounted for through the double attenuation of the optical flow due to air humidity. In broadband passive remote sensing of terrestrial thermal objects in the short-wavelength infrared range, the single attenuation due to the effect of relative humidity and attenuation due to atmospheric aerosols should be considered. The positive correlation between τ_a and RH (i.e., an increase in RH accompanied by an increase in τ_a) is a factor leading to the maximum reduction of the reflected signal in passive remote sensing of thermal terrestrial objects.