Laser altimeter data obtained over sea-ice during the ARK-XIX/1 campaign in Mar-Apr, 2003; profile ARK-XIX-1_SBLA_20030415T1043_81.89_10.33_thr06_data_Vers5

Sea ice surface roughness data were obtained during the ARK-XIX/1 campaign in Mar-Apr, 2003 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by a Helicopter (RV-Polarstern Helicopter). 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 20030415T1043. 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]

本数据集的海冰表面粗糙度数据采集于2003年3月至4月的ARK-XIX/1科考航次，搭载于单波束激光高度计（Single Beam Laser Altimeter，SBLA），该高度计集成于电磁系统（EM-Bird）中，由搭载于RV-Polarstern号的直升机以距海面10~30米的高度拖曳作业。
本次研究采用Hibler（1972）提出的方法完成两项核心处理：a）从与飞行器运动相关的低频波动中剥离出海面高程剖面；b）识别海冰压力脊帆（pressure ridge sails）。
数据处理流程详见链接：https://epic.awi.de/id/eprint/56364/。
本次研究采用的脊帆检测阈值为0.6米，即仅能识别高度大于0.6米的脊帆。
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，代码仓库链接：https://gitlab.awi.de/sitem/sbla_processing.git）。
本次使用的SBLA记录设备型号为RIEGL LD90，其采样率为100 Hz。该传感器的测量精度为5厘米，地表激光光斑直径为5.8厘米。
本数据集的具体采集时间为2003年4月15日10时43分（标识为20030415T1043）。
数据集包含记录的高度计读数、反演得到的海面高程，以及已识别的海冰压力脊帆的宽度、高度与间距。
数据质量说明：5.8厘米。
数据集文件命名规则：[DMS/PANGAEA Campaign Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]