Laser altimeter data obtained over sea-ice during the PS92 campaign in May-Jun, 2015; profile PS92_SBLA_20150618T0808_82.01_9.31_thr06_data_Vers5@en

Sea ice surface roughness data were obtained during the PS92 campaign in May-Jun, 2015 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 20150618T0808. 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]本数据集为海冰表面粗糙度数据，采集于2015年5—6月开展的PS92航次。数据由集成于电磁系统（EM-Bird）内的单波束激光高度计（Single Beam Laser Altimeter，SBLA）采集得到，该系统由极星号科考直升机（RV-Polarstern Helicopter）以10~30米的高度拖曳飞行。 研究采用Hibler（1972）提出的方法完成两项核心处理工作：a）从与直升机运动相关的低频信号扰动中提取海面剖面；b）识别冰脊帆（pressure ridge sails）。 数据处理流程详见https://epic.awi.de/id/eprint/56364/。 本次研究设置的冰脊检测阈值为0.6米，即仅可识别高度大于0.6米的冰脊帆。 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，源码仓库地址：https://gitlab.awi.de/sitem/sbla_processing.git）。 本数据集所用的单波束激光高度计型号为RIEGL LD90，采样率为100赫兹。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20150618T0808（即2015年6月18日08时08分）。 数据集包含记录的高度计读数、反演得到的海面高程，以及已识别冰脊帆的宽度、高度与间距。 数据质量说明：地表激光光斑直径为5.8厘米。 文件名命名规则为：[DMS/PANGAEA航次标识符] + [设备名称] + [采集日期/时间] + [经纬度] + [检测阈值] + [目标对象] + [版本号] + [文件格式]。