Abstract. UCATS (the UAS Chromatograph for Atmospheric Trace Species) was designed and built for observations of important atmospheric trace gases from unmanned aircraft systems (UAS) in the upper troposphere and lower stratosphere (UT/LS). Initially it measured major chlorofluorocarbons (CFCs) and the stratospheric transport tracers nitrous oxide (N₂O) and sulfur hexafluoride (SF₆), using gas chromatography with electron capture detection. Compact ozone (O₃) and water vapor (H₂O) instruments were added to enhance science missions on platforms with relatively small payloads. Over the past decade, UCATS has been reconfigured to measure methane (CH₄), carbon monoxide (CO), and molecular hydrogen (H₂) instead of CFCs and has undergone numerous upgrades to its subsystems. It has served as part of large payloads on stratospheric UAS missions to probe the tropical tropopause region and transport of air into the stratosphere, in piloted aircraft studies of greenhouse gases, transport, and chemistry in the troposphere, and will soon return to the study of stratospheric ozone depletion, one of the original goals for UCATS. Each deployment brought different challenges, which were largely met or resolved. The design, capabilities, modifications and some results from UCATS are shown and described here, including changes for upcoming missions.

中文翻译：

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UAS大气痕量物种色谱仪（UCATS）–机载平台上痕量气体测量的多功能仪器

摘要。UCATS（用于微量痕量物质的UAS色谱仪）的设计和制造是为了观察对流层上层和低层平流层（UT / LS）中无人飞行器系统（UAS）的重要大气痕量气体。最初，它采用电子捕获检测气相色谱法测量了主要的氯氟烃（CFC）和平流层运输示踪剂一氧化二氮（N ₂ O）和六氟化硫（SF ₆）。添加了紧凑型臭氧（O ₃）和水蒸气（H ₂ O）仪器，以增强有效载荷相对较小的平台上的科学任务。在过去的十年中，UCATS已重新配置以测量甲烷（CH ₄），一氧化碳（CO）和分子氢（H ₂）代替CFC，并且对其子系统进行了许多升级。它在平流层UAS任务中作为大型有效载荷的一部分，用于探测热带对流层顶区域和向平流层中的空气传输，在对流层中温室气体，传输和化学的试点飞机研究中，并将很快返回到对流层的研究。平流层臭氧消耗，这是UCATS的最初目标之一。每次部署都带来了不同的挑战，这些挑战在很大程度上已经得到解决。UCATS的设计，功能，修改和一些结果在此处显示和描述，包括对即将执行的任务的更改。