Laser altimeter data obtained over sea-ice during the ARK-XII campaign in Jul-Sep, 1996; profile ARK-XII_SBLA_19960819T1203_82.55_134.15_thr06_data_Vers5@en

Sea ice surface roughness data were obtained during the ARK-XII campaign in Jul-Sep, 1996 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 19960819T1203. 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]海冰表面粗糙度数据采集于1996年7—9月的ARK-XII科考航次，通过搭载于米里-8型直升机（Mil MI-8）的单波束激光高度计（Single Beam Laser Altimeter，SBLA）获取。研究采用Hibler（1972）提出的处理方法，实现两项核心任务：a）从与飞行器运动相关的低频噪声中分离出真实海面高程剖面；b）识别冰脊帆体（pressure ridge sails）。数据处理的详细步骤可参考https://epic.awi.de/id/eprint/56364/。本次数据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米的冰脊帆体。本次使用的处理程序版本与名称为：Laser_Altimeter_Processing_VS5_06_20.py（版本5，2024年2月22日，代码仓库地址：https://gitlab.awi.de/sitem/sbla_processing.git）。单波束激光高度计的原始记录数据（型号IBEO - PS100E）采样率为200Hz，传感器测量精度为3厘米，地表激光光斑直径为11.4厘米。本数据集的采集时刻为1996年8月19日12时03分（对应标识19960819T1203），包含记录的高度计原始读数、反演得到的海面高程数据，以及检测得到的冰脊帆体的宽度、高度与间距信息。数据质量说明：11.4厘米。数据集文件名命名规则为：由[DMS/PANGAEA科考航次标识符] + [设备名称] + [日期/时间] + [纬度/经度] + [检测阈值] + [目标物] + [版本号] + [文件格式] 拼接组合而成。