Gridded segments of sea-ice or snow surface elevation and freeboard from helicopter-borne laser scanner during the MOSAiC expedition, version 1

This data set is a higher-processing-level version of Geolocated sea-ice or snow surface elevation point clouds from helicopter-borne laser scanner during the MOSAiC expedition, version 1 (Jutila et al., 2022; doi:10.1594/PANGAEA.950509), where the surface elevation point cloud has been converted to freeboard using automatic open water detection scheme and projected onto a regular 0.5-meter grid. The data were collected using a near-infrared, line-scanning Riegl VQ-580 airborne laser scanner (hdl:10013/sensor.7ebb63c3-dc3b-4f0f-9ca5-f1c6e5462a31 & hdl:10013/sensor.7a931b33-72ca-46d0-b623-156836ac9550) mounted in a helicopter along the MOSAiC drift from the north of the Laptev Sea, across the central Arctic Ocean, and towards the Fram Strait from September 2019 to October 2020. The flights are both small scale, ~5x5 km grid patterns mainly over the central observatory, and large scale, few tens of km away from RV Polarstern, triangle patterns, or transects. […]

本数据集为 MOSAiC（北极海洋与大气研究项目）探险期间，由直升机搭载激光扫描仪采集的定位海冰或雪面高程点云数据的高级处理版本（Jutila 等人，2022年；doi:10.1594/PANGAEA.950509）。其中，通过自动开放水域检测方案将表面高程点云转换为干舷高，并投影至规则化的0.5米网格上。数据采集采用近红外线线扫描式 Riegl VQ-580 机载激光扫描仪（hdl:10013/sensor.7ebb63c3-dc3b-4f0f-9ca5-f1c6e5462a31 & hdl:10013/sensor.7a931b33-72ca-46d0-b623-156836ac9550），该扫描仪安装在直升机上，沿 MOSAiC 漂移路径从拉普捷夫海北部，穿越中央北极洋，直至2020年10月前往弗拉姆海峡。飞行路径包括小规模、约5x5公里网格模式，主要覆盖中央观测站，以及大规模、距离极地星号 RV 数十公里外的三角形模式或横断面。