Laser altimeter data obtained over sea-ice during the ARK-XI/1 campaign in Jul-Sep, 1995; profile ARK-XI-1_SBLA_19950817T1007_79.15_135.25_thr06_data_Vers5@en
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Sea ice surface roughness data were obtained during the ARK-XI/1 campaign in Jul-Sep, 1995 with a Single Beam Laser Altimeter (SBLA) mounted on an/a Helicopter (Mil MI-8) . 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 (IBEO - PS100E) are provided at a sampling rate of 200 Hz. Sensor accuracy is 3 cm with a beam diameter at surface of 11.4 cm. This specific dataset was obtained on 19950817T1007. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 11.4 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1995年7月至9月的ARK-XI/1科考航次，由搭载于米里MI-8（Mil MI-8）直升机的单波束激光高度计（Single Beam Laser Altimeter, SBLA）获取。 研究采用Hibler于1972年提出的方法完成两项核心处理：a）剥离由载机运动引入的低频干扰以提取真实地表剖面；b）识别冰脊帆结构。具体处理流程详见https://epic.awi.de/id/eprint/56364/。 本次处理设置的冰脊检测阈值为0.6米，即仅能识别高度不低于0.6米的冰脊帆。 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，开源仓库地址：https://gitlab.awi.de/sitem/sbla_processing.git）。 本次使用的单波束激光高度计（SBLA）原始数据（IBEO - PS100E）以200 Hz的采样率采集存储。该传感器的测量精度为3厘米，激光束在冰面的光斑直径为11.4厘米。 本批次专属数据集的采集时间为1995年8月17日10时07分（时间戳格式：19950817T1007），数据集包含实测高度计读数、反演得到的冰面高程数据，以及检测得到的冰脊帆的宽度、高度与间距参数。 数据质量说明：11.4厘米。 数据集文件命名格式为：[DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]
