Sea ice surface roughness data were obtained in Mar, 1993 (19930304T0400 ) 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/. This dataset is based on a ridge detection threshold of 0.6 m, which means that only sails higher 0.6 m are detected. Applied processing routine: laser_Altimeter_Processing_VS5_06_20.py (vers.5, Feb 22, 2024). 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. The dataset includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. File name: [DMS/PANGAEA Campaign Identifier] + [DEVICE] + [DATE/TIME] + [Detection Threshold] + [Data Type} + [Version] + [Format]