10.1594/PANGAEA.970630Krumpen, ThomasThomasKrumpen0000-0001-6234-8756Haas, ChristianChristianHaas0000-0002-7674-3500Hendricks, StefanStefanHendricks0000-0002-1412-3146PANGAEA2024Laser AltimeterRidge HeightRidge SpacingRidge WidthSea Ice Surface RoughnessDATE/TIMETime in secondsLATITUDELONGITUDEPOINT DISTANCE from startHEIGHT above groundSurface elevationRidge height, maximumRidge boundary, leftRidge boundary, rightRidge widthRidge spacing, typicalLead event (true/false)Single beam laser altimeterSingle beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.pyP6-211_ASIMBO_2018POLAR 62018-08-13T12:56:57/2018-08-13T13:17:32Dataset10.1594/PANGAEA.97064010.1038/s41558-024-02199-510013/epic.96923a78-d232-4bd8-82f4-337799d2fa07https://gitlab.awi.de/sitem/sbla_processing.git10013/epic.30c63deb-b1f5-4c1e-927b-3d8a8d495b82249875 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalSea ice surface roughness data were obtained during the IceBird Summer campaign in Jul-Aug, 2018 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-6). 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 (ASTECH - LDM) are provided at a sampling rate of 100 Hz. Sensor accuracy is 2 cm with a beam diameter at surface of 6.3 cm. This specific dataset was obtained on 20180813T1254. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 6.3 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]-22.534241-19.69169885.34413885.838483