Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2010; profile TIFAX_2010_SBLA_20100822T0930_82.16_-9.21_thr06_data_Vers5@en

Sea ice surface roughness data were obtained during the TIFAX campaign in Aug, 2010 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by an Airplane (Basler BT-67, Polar-5). 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 20100822T0930. 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]海冰表面粗糙度数据采集于2010年8月的TIFAX科考航次，搭载于安装在电磁系统（EM-Bird）内的单波束激光高度计（Single Beam Laser Altimeter，SBLA），该系统由飞机（Basler BT-67，极地-5号）拖曳，飞行高度为海面上方10~30米。研究采用Hibler（1972）提出的方法，完成两项任务：a）从与飞机运动相关的低频分量中分离出海面剖面信号；b）识别冰脊帆体（pressure ridge sails）。数据处理流程详见https://epic.awi.de/id/eprint/56364/。本次处理采用的冰脊检测阈值为0.6米，即仅能检测到高度不低于0.6米的冰脊帆体。处理程序的版本与名称：Laser_Altimeter_Processing_VS5_06_20.py（版本5，2024年2月22日，https://gitlab.awi.de/sitem/sbla_processing.git）。SBLA记录数据（RIEGL LD90型）的采样率为100赫兹。该传感器的测量精度为5厘米，地表处光束直径为5.8厘米。本数据集的采集时间为2010年8月22日09时30分（标识为20100822T0930）。数据集包含实测高度计读数、反演得到的海面高程数据，以及检测到的冰脊帆体的宽度、高度与间距信息。数据质量说明：5.8厘米。文件命名规则：[DMS/PANGAEA科考航次标识符] + [设备名称] + [日期/时间] + [经纬度] + [检测阈值] + [目标对象] + [版本号] + [文件格式]