MODELING THE SPATIAL RESOLUTION AND FLIGHT ALTITUDE DEPENDENCE OF THE RESPONSE IN RADIOMETRIC MONITORING USING UAV

The result interpretation of a terrain airborne radiometric monitoring depends, among others, on the spatial resolution of the measurement (i.e. the area from which the value of the measured quantity is averaged) and on the altitude dependence of the response of the measuring device. For the needs of monitoring using unmanned aerial vehicles, the approximate values of these parameters were determined by stochastic calculations for selected model conditions. Calculations were of natural background components (K, U and Th) and the surface contamination with radionuclides emitting energies was in the range of 0.3-3 MeV. The dependence on the source radius was modeled in the range of 2-450 m and flight altitude dependence was modeled in the range of 1-30 m. The modeled dependencies are used to refine the interpretation of experimental data, or to optimize the planning of monitoring the flight routes, according to specified monitoring objectives.