Laser altimeter data obtained over sea-ice during the ARK-XI/1 campaign in Jul-Sep, 1995; profile ARK-XI-1_SBLA_19950805T1345_79.46_131.58_thr06_data_Vers5@en

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 19950805T1345. 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]本数据集为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-8（Mil MI-8）直升机的单波束激光高度计（Single Beam Laser Altimeter, SBLA）完成采集。 研究采用Hibler（1972）提出的方法开展两项处理工作：a）从与飞行器运动相关的低频干扰中分离出表面剖面；b）识别冰压力脊帆体（pressure ridge sails）。 数据处理流程详见https://epic.awi.de/id/eprint/56364/。 本次处理设置的冰脊检测阈值为0.6米，即仅可探测到高度不低于0.6米的冰压力脊帆体。 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，https://gitlab.awi.de/sitem/sbla_processing.git）。 单波束激光高度计（SBLA）的原始记录（IBEO - PS100E）采样率为200 Hz。 传感器精度为3厘米，地表光束直径为11.4厘米。 本数据集的采集时间为1995年8月5日13时45分（19950805T1345），包含记录的高度计读数、导出的表面高程，以及探测到的冰压力脊帆体的宽度、高度与间距。 数据质量备注：11.4厘米。 文件名命名规则为：[DMS/PANGAEA科考航次标识] + [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]