Airborne-deployed ocean sensors in the Southern Ocean, 2016-2018, Level 0 data

Extracted Level 0 data are provided as audio files recorded in flight with a Sony PX470 voice recorder. These files were processed to generate the associated Level 2 products.Project 4346 demonstrated the use of Airborne eXpendable Bathy-Thermograph (AXBT) and Airborne eXpendable Conductivity, Temperature, Depth (AXCTD) sensors from a BT-67 Basler aircraft in East Antarctica. The primary objective was to use AXBT and AXCTD sensors to infer seafloor depth where no previous measurements had been made by ship, often by deploying sensors into narrow gaps in sea ice. Inferring a snapshot of the ocean state by detecting major thermoclines was a secondary objective.Although several sensors were purchased with external funds, the efforts to develop operational and subsequent data analysis approaches were unfunded as this was an add-on, target of opportunity. The effort is best described as a prototype demonstration project to test whether the seafloor depth could be inferred beneath narrow sea ice leads from a rapidly flying aircraft. All but eight AXBT sensors were donated to the University of Texas Institute for Geophysics (UTIG); AXCTDs were purchased by the Antarctic Gateway Partnership. Receiver and data processing equipment were loaned to UTIG.

提取的0级数据以使用Sony PX470录音笔在飞行中录制的音频文件形式提供。这些文件经处理后生成了相关的2级产品。

4346项目展示了在东南极洲通过BT-67 Basler飞机搭载空投式消耗性温深仪（Airborne eXpendable Bathy-Thermograph，AXBT）和空投式消耗性电导率、温度、深度仪（Airborne eXpendable Conductivity, Temperature, Depth，AXCTD）传感器开展的应用。其主要目标是利用AXBT和AXCTD传感器，对船舶从未测量过的海底深度进行推断——通常是将传感器部署至海冰的狭窄缝隙中。次要目标则是通过检测主要温跃层，获取海洋状态的瞬时快照。

尽管部分传感器由外部资金购置，但开发操作流程及后续数据分析方法的工作未获资助，因这是一项附加的机会性目标任务。该工作最适合被描述为原型演示项目，旨在测试能否从快速飞行的飞机上推断狭窄海冰通道下方的海底深度。除8个AXBT传感器外，其余均捐赠给了得克萨斯大学地球物理研究所（University of Texas Institute for Geophysics，UTIG）；AXCTD传感器由南极门户合作伙伴关系（Antarctic Gateway Partnership）购置。接收器及数据处理设备则借给了UTIG。