Laser altimeter data obtained over sea-ice during the ARTIST campaign in Mar-Apr, 1998; profile Artist_SBLA_19980409T0000_80.31_4.74_thr06_data_Vers5@en

Sea ice surface roughness data were obtained during the ARTIST campaign in Mar-Apr, 1998 with a Single Beam Laser Altimeter (SBLA) mounted on an/a Airplane (Dornier Do-228, Polar-2) . 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 19980409T0000. 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1998年3至4月的ARTIST科考航次，由搭载于多尼尔Do-228（极地2号）飞机的单波束激光高度计（Single Beam Laser Altimeter，SBLA）获取。本次数据采用Hibler于1972年提出的方法进行处理，该方法可实现两项核心功能：a）从受飞行器运动引入的低频噪声中分离出真实的海冰表面高程剖面；b）识别海冰压力脊帆体。数据处理的详细步骤可参见https://epic.awi.de/id/eprint/56364/。本次研究设置的脊体检测阈值为0.6米，即仅可识别高度大于0.6米的海冰压力脊帆体。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，代码仓库地址：https://gitlab.awi.de/sitem/sbla_processing.git）。单波束激光高度计（SBLA）的原始记录（型号为IBEO-PS100E）采样率为200Hz，该传感器的测量精度为3厘米，地表激光光斑直径为11.4厘米。本数据集的采集时间为1998年4月9日0时0分（19980409T0000），包含高度计原始读数、反演得到的海冰表面高程，以及已识别的海冰压力脊帆体的宽度、高度与间距信息。数据质量说明：11.4厘米。文件名命名规则：[DMS/PANGAEA科考航次标识] + [设备名称] + [日期/时间] + [经纬度] + [检测阈值] + [目标物类型] + [版本号] + [文件格式]