This paper presents the method and results of surveying a dispersed radioactive field using an unmanned air vehicle (UAV) and an unmanned ground vehicle (UGV). A 35 GBq of La material was distributed in a specific geometric l-polygon pattern measuring a 120 m  20 m longitudinal rectangle and an 80 m  10 m transverse rectangle. Two methods were used to determine the amount and distribution of the lanthanum over the polygon including 20 plywood coupons distributed over the area and a UGV equipped with a Kromek GR1® driving over the area. The aerial survey was conducted using an unmanned aerial vehicle UAV carrying the Kromek GR1® while flying a traditional grid pattern and circular pattern at different elevations and speeds over the area. The data collected by the UAV were further postprocessed using N-Visage, a 3D radiation modeling method developed by Createc, to create a model of the ground activity. This model was compared with the reference data collected on the ground by the UGV and was found to be in agreement with 11%.

中文翻译：

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放射性扩散事件后的无人机/地面车辆调查

本文介绍了使用无人机（UAV）和无人地面车辆（UGV）测量分散放射性场的方法和结果。 35 GBq 的La 材料分布在特定的几何l多边形图案中，测量范围为 120 m  20 m 纵向矩形和 80 m  10 m 横向矩形。使用两种方法来确定多边形上镧的数量和分布，包括分布在该区域上的 20 个胶合板试样和一辆配备有 Kromek GR1® 的 UGV 在该区域上行驶。空中测量是使用携带 Kromek GR1® 的无人机进行的，同时以不同的高度和速度在该地区上空飞行传统的网格模式和圆形模式。无人机收集的数据使用 Createc 开发的 3D 辐射建模方法 N-Visage 进行进一步后处理，以创建地面活动模型。将此模型与 UGV 在地面收集的参考数据进行比较，发现吻合度为 11%。