A novel gamma-ray UAV high sensitive system was tested on real uranium anomaly by Ondřej Šálek and his collaborators. The uranium anomaly was indicated at flight altitudes up to 40 m. Recorded data quality is comparable with classic airborne measurement and the introduced device is easily applicable in radiometric survey of a limited area.
Šálek O., Matolín M., Gryc L. (2018): Mapping of radiation anomalies using UAV mini-airborne gamma-ray spectrometry. Journal of Environmental Radioactivity 182, 101-107. (DOI)