Laser altimeter data obtained over sea-ice during the CryoVEx campaign in May, 2006; profile CryoVEx_ARK_2006_SBLA_20060511T1651_82.88_-56.92_thr06_data_Vers5@en

Sea ice surface roughness data were obtained during the CryoVEx campaign in May, 2006 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by a Helicopter (Unknown model). A method developed by Hibler (1972) was used to a) isolate the surface profile from low-frequency variations associated with the aircraft motion and b) to identify pressure ridge sails. The processing steps are described in https://epic.awi.de/id/eprint/56364/. We applied a ridge detection threshold of 0.6 m, which means that only sails higher 0.6 m are detected. Version and name of the processing routine: Laser_Altimeter_Processing_VS5_06_20.py (vers.5, Feb 22, 2024, https://gitlab.awi.de/sitem/sbla_processing.git). SBLA records (RIEGL - LD90) are provided at a sampling rate of 100 Hz. Sensor accuracy is 5 cm with a beam diameter at surface of 5.8 cm. This specific dataset was obtained on 20060511T1651. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 5.8 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]本数据集的海冰表面粗糙度数据采集于2006年5月的CryoVEx科考活动，由搭载于电磁拖曳系统（electromagnetic system，EM-Bird）内的单波束激光高度计（Single Beam Laser Altimeter，SBLA）完成数据采集，该系统由未知型号直升机以距地表10~30米的高度拖曳作业。本次数据处理采用Hibler于1972年提出的方法，实现两项核心功能：a）从与直升机运动相关的低频噪声中分离出海面高程剖面；b）识别冰脊帆状凸起（pressure ridge sails）。数据处理的详细步骤可参考https://epic.awi.de/id/eprint/56364/。本次设置的冰脊检测阈值为0.6米，即仅能识别高度高于0.6米的帆状凸起。数据处理程序的版本与名称为：Laser_Altimeter_Processing_VS5_06_20.py（版本5，2024年2月22日，源码仓库地址：https://gitlab.awi.de/sitem/sbla_processing.git）。本次使用的SBLA传感器为RIEGL LD90型，采样率设置为100 Hz。该传感器的精度为5厘米，地表光斑直径为5.8厘米。本特定数据集的采集时间为2006年5月11日16时51分（格式：20060511T1651）。数据集包含以下内容：实测高度计读数、反演得到的海面高程数据，以及识别出的冰脊帆状凸起的宽度、高度与间距。数据质量备注：5.8厘米。文件名命名规则：[DMS/PANGAEA科考航次标识] + [设备信息] + [日期/时间] + [经纬度] + [检测阈值] + [目标对象] + [版本号] + [文件格式]