Bathymetry from two Arctic lakes in the Mackenzie Delta, Northwest Territories, Canada@en

Bathymetry from small lakes in the Arctic is generally not available; however, this type of data is useful in interpreting other data, such as geoelectric surveys. To this end, we deployed a small automated boat carrying a sonar sensor to measure water depth and a GNSS to measure position on two lakes: Swiss Cheese Lake” (69.2320°N / 135.2513°W) between Sept. 13 and 16, 2021 and at “Lake 3” (68.7763°N / 133.5404°W) on Sept. 18, 2021. The boat is approximately 80 cm long and propelled with a single thruster. The boat uses a Pixhawk 4 controller to automate it's movement and record all the data from the mission. An Airmar SS510 transducer measures water depth (bathymetry) at 200kHz, with beam width of 9°, and can measure from 0.4 to 200m with a resolution of 1cm (depth accuracy 99.46% at full range). The boat has two GNSS (GPS) receivers; one U-blox Neo-M8N (2.5m position accuracy) and one Emlid Reach M+. The Reach M+ is capable of cm level positioning when used with a base station (RTK) or if the data are post processed (PPK) after data collection. Available here are both the raw and processed datasets in different formats. Please see the included Readme_mcan21_BathyBoat.pdf for detailed information on the datafiles and data processing.北极小型湖泊的水深测量数据（bathymetry）通常难以获取，但这类数据在解译电法勘探等其他类型数据时具有重要应用价值。为此，我们于2021年9月13日至16日在“瑞士奶酪湖”（Swiss Cheese Lake，北纬69.2320°，西经135.2513°），并于2021年9月18日在“3号湖”（Lake 3，北纬68.7763°，西经133.5404°）部署了一艘搭载声纳传感器与全球导航卫星系统（GNSS）的小型自动化无人船，用于测量水深与点位坐标。该无人船全长约80厘米，采用单推进器驱动，搭载Pixhawk 4控制器实现自主航行，并记录任务全程的所有采集数据。船上搭载的Airmar SS510换能器以200kHz频率测量水深（bathymetry），波束宽度为9°，测量量程覆盖0.4至200米，分辨率达1厘米，全量程下测量精度为99.46%。该船配备两台GNSS（GPS）接收机，分别为U-blox Neo-M8N（定位精度2.5米）与Emlid Reach M+。Emlid Reach M+在搭配基准站（实时动态差分，RTK）使用，或在数据采集完成后进行后处理动态定位（PPK）时，可实现厘米级定位精度。本次公开的数据集包含不同格式的原始与处理后数据。有关数据文件与数据处理的详细说明，请参阅随附的Readme_mcan21_BathyBoat.pdf文档。