The Technical University of Catalonia (UPC), the National Metrology Institute of Germany (PTB) and the German Federal Office for Radiation Protection (BfS) have analysed the response of a 50 mm × 50 mm (diameter × height) NaI and a 38 mm × 38 mm CeBr₃ scintillator, and a 1500 mm³ CZT semiconductor airborne spectrometric detector mounted on Unmanned Aerial Systems (UAS) in a comparison campaign carried out at the aerial site of Mollerussa (Spain). The decision thresholds that indicate the presence of artificial radioactivity are calculated for the count rates in the low energy region of the spectra, the man-made count rates and the ambient dose equivalent rates from the background flights performed at altitudes ranging between 10 m and 60 m. The capability of the different airborne systems to detect and determine the activity of 345 MBq ¹³⁷Cs point source at different flight altitudes are compared. Finally, the airborne systems show the ability to localize the ¹³⁷Cs point source by flying in parallel lines at 10 m, 20 m and 40 m heights.

加泰罗尼亚技术大学 (UPC)、德国国家计量研究所 (PTB) 和德国联邦辐射防护办公室 (BfS) 分析了 50 mm × 50 mm（直径 × 高度）NaI 和 38 mm × 38 mm CeBr ₃闪烁体和一个 1500 mm ³CZT 半导体机载光谱检测器安装在无人航空系统 (UAS) 上，用于在 Mollerussa（西班牙）的空中站点进行的比较活动。表明存在人工放射性的判定阈值是针对光谱低能量区域的计数率、人为计数率和在 10 m 和 60 米之间的高度范围内进行的背景飞行的环境剂量当量率计算的。米。比较了不同机载系统在不同飞行高度检测和确定 345 MBq ¹³⁷ Cs 点源活动的能力。最后，机载系统显示了通过在 10 m、20 m 和 40 m 高度平行飞行来定位¹³⁷ Cs 点源的能力。