Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul-Aug, 2016

• Main Authors: Krumpen, Thomas, Haas, Christian, Hendricks, Stefan
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: DATE/TIME; Event label; HEIGHT above ground; Laser Altimeter; LATITUDE; Lead event (true/false); LONGITUDE; P6-202-TIFAX_2016; POINT DISTANCE from start; POLAR 6; Ridge boundary; left; right; Ridge Height; maximum; Ridge Spacing; typical; Ridge width; SBLA; Sea Ice Surface Roughness; Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py; Surface elevation; TIFAX_2016; TIFAX_2016_SBLA_20160724T132329; TIFAX_2016_SBLA_20160724T135022; TIFAX_2016_SBLA_20160724T142612; TIFAX_2016_SBLA_20160724T150108; TIFAX_2016_SBLA_20160724T152419; TIFAX_2016_SBLA_20160725T114801; TIFAX_2016_SBLA_20160725T121357; TIFAX_2016_SBLA_20160725T124619; TIFAX_2016_SBLA_20160725T131343; TIFAX_2016_SBLA_20160726T110847; TIFAX_2016_SBLA_20160726T113621; TIFAX_2016_SBLA_20160726T120720; TIFAX_2016_SBLA_20160726T125015; TIFAX_2016_SBLA_20160726T132436; TIFAX_2016_SBLA_20160728T080249; TIFAX_2016_SBLA_20160728T082810; TIFAX_2016_SBLA_20160728T084509; TIFAX_2016_SBLA_20160728T091642; TIFAX_2016_SBLA_20160728T095032; TIFAX_2016_SBLA_20160729T115100; TIFAX_2016_SBLA_20160729T121845; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.969268

Sea ice surface roughness data were obtained during the TIFAX campaign in Jul-Aug, 2016 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 (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 20160801T1512. 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]