Under the comprehensive nuclear-test-ban treaty a State Party may request an on-site inspection to establish whether a nuclear explosion has taken place. The on-site inspection may include high- and low-resolution gamma spectroscopy surveys as well as environmental sampling and analysis. Aerial radiometric survey in particular has been demonstrated to provide efficient coverage of large areas. We have developed the Advanced Radiation Detector for Unmanned Aerial Vehicle (UAV) Operations (ARDUO) and are investigating its possible contribution to aerial radiometric survey in on-site inspection. This gamma spectrometer is direction-capable; it can point out the direction toward a source of radioactivity while in flight. We have collected data with the ARDUO flown over one and two point radiation sources in a grid survey covering 5,000 m2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document}. With this data we demonstrate how directional techniques can be implemented in mobile aerial surveys to improve the spatial precision of the resulting radioactivity map. In particular, in an on-site inspection, an Inspected State Party may declare up to 50 km2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document} of restricted-access sites, each of area up to 4 km2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document}. We show how perimeter survey outside of a restricted-access site of area 920 m2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document} with the direction-capable ARDUO permits a reconstruction of the distribution of radioactivity within the no-fly zone.

中文翻译：

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使用具有 ARDUO 定向能力的伽玛光谱仪的无人机周边勘测检查受限访问站点

根据全面禁止核试验条约，缔约国可以要求进行现场视察，以确定是否发生了核爆炸。现场检查可能包括高分辨率和低分辨率伽马光谱调查以及环境采样和分析。特别是航空辐射测量已被证明可以提供大面积的有效覆盖。我们开发了用于无人驾驶飞行器 (UAV) 操作的高级辐射探测器 (ARDUO)，并正在研究其对现场检查中的航空辐射测量可能做出的贡献。该伽马光谱仪具有定向能力；它可以在飞行中指出放射源的方向。我们收集了 ARDUO 飞越一个和两个点辐射源的数据，网格调查覆盖了 5 个，000 m2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin }{-69pt} \begin{document}$$^2$$\end{document}。通过这些数据，我们展示了如何在移动航测中实施定向技术，以提高所得放射性地图的空间精度。特别是，在现场视察中，被视察缔约国最多可申报 50 平方公里\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage {amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document} 限制访问站点，每个区域最多 4 平方公里\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document}。我们展示了如何在 920 m2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \ usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document} 与具有定向能力的 ARDUO 允许重建内的放射性分布禁飞区。