Krumpen, Thomas; Haas, Christian; Hendricks, Stefan: Laser altimeter data obtained over sea-ice during the Transdrift-XX campaign in Apr, 2012 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.969142 (dataset in review)
Abstract:
Sea ice surface roughness data were obtained during the Transdrift-XX campaign in Apr, 2012 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 (Mil MI-8). 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 dataset 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]
Related to:
Krumpen, Thomas (2017): Data report: EM-Bird ice thickness measurements in the Laptev Sea in April 2012 and 2008. hdl:10013/epic.51534.d001
Data processing report:
Suhrhoff, Mira (2021): Sea Ice Surface Roughness from Single Beam Laser Altimeter Measurements - Method Development and Comparison with Airborne Laser Scanner Profiles. Universität Trier, hdl:10013/epic.30c63deb-b1f5-4c1e-927b-3d8a8d495b82
Coverage:
Median Latitude: 74.381368 * Median Longitude: 127.219518 * South-bound Latitude: 73.919089 * West-bound Longitude: 126.386070 * North-bound Latitude: 74.769000 * East-bound Longitude: 128.596890
Date/Time Start: 2012-04-20T03:28:00 * Date/Time End: 2012-04-20T05:01:03
Event(s):
Transdrift-XX_SBLA_20120420T032800 * Latitude Start: 74.193583 * Longitude Start: 126.791990 * Latitude End: 74.553624 * Longitude End: 126.544960 * Date/Time Start: 2012-04-20T03:28:00 * Date/Time End: 2012-04-20T03:48:20 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XX * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Transdrift-XX_SBLA_20120420T035126 * Latitude Start: 74.606220 * Longitude Start: 126.500060 * Latitude End: 74.608833 * Longitude End: 126.835260 * Date/Time Start: 2012-04-20T03:51:26 * Date/Time End: 2012-04-20T04:14:06 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XX * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Transdrift-XX_SBLA_20120420T041723 * Latitude Start: 74.560184 * Longitude Start: 126.962510 * Latitude End: 74.251928 * Longitude End: 127.776370 * Date/Time Start: 2012-04-20T04:17:23 * Date/Time End: 2012-04-20T04:38:35 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XX * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
929648 data points
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