Geolocated sea-ice or snow surface elevation point cloud segments from helicopter-borne laser scanner during the MOSAiC expedition, version 1

This data set provides high-resolution geolocated point clouds of sea-ice or snow surface elevation for mapping temporal and spatial evolution of sea-ice conditions such as freeboard, roughness, or the size and spatial distributions of surface features. The surface elevation data are referenced to the DTU21 mean sea surface height and are not corrected for sea-ice drift during acquisition. 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. […]

本数据集提供了高分辨率、地理定位的海冰或雪表面高程数据，用于绘制海冰条件的时空演变，例如自由板、粗糙度，或表面特征的尺寸和空间分布。表面高程数据以DTU21平均海面高度为基准，并在采集过程中未对海冰漂移进行校正。数据采集采用近红外线激光扫描仪Riegl VQ-580（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漂移路线从拉普捷夫海北部出发，穿过中央北极洋，直至2020年10月从弗兰格尔海峡方向采集。飞行路径包括小规模、约5x5公里的网格模式，主要覆盖中央观测站，以及大范围、距极星号RV数十公里的三角形模式或横切线模式。