Hendricks, Stefan; Haas, Christian; Krumpen, Thomas: Laser altimeter data obtained over sea-ice during the GreenIce campaign in May, 2004 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.969301 (dataset in review)
Abstract:
Sea ice surface roughness data were obtained during the GreenIce campaign in May, 2004 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 (Unknown model). 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 20040513T2157. 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]
Coverage:
Median Latitude: 84.639033 * Median Longitude: -69.721327 * South-bound Latitude: 82.690565 * West-bound Longitude: -81.244499 * North-bound Latitude: 85.872000 * East-bound Longitude: -60.452578
Date/Time Start: 2004-05-12T00:00:00 * Date/Time End: 2004-05-13T22:07:41
Event(s):
GreenICE2004_SBLA_20040512T162627 * Latitude Start: 82.690565 * Longitude Start: -62.381301 * Latitude End: 82.994015 * Longitude End: -62.499779 * Date/Time Start: 2004-05-12T16:26:27 * Date/Time End: 2004-05-12T16:41:06 * Sensor URI: registry.o2a-data.de * Campaign: GreenICE2004 * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
GreenICE2004_SBLA_20040512T164321 * Latitude Start: 83.023633 * Longitude Start: -62.721289 * Latitude End: 83.257210 * Longitude End: -64.923120 * Date/Time Start: 2004-05-12T16:43:21 * Date/Time End: 2004-05-12T16:59:42 * Sensor URI: registry.o2a-data.de * Campaign: GreenICE2004 * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
GreenICE2004_SBLA_20040512T170154 * Latitude Start: 83.287888 * Longitude Start: -65.229516 * Latitude End: 83.494811 * Longitude End: -67.444009 * Date/Time Start: 2004-05-12T17:01:54 * Date/Time End: 2004-05-12T17:16:34 * Sensor URI: registry.o2a-data.de * Campaign: GreenICE2004 * 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:
4461124 data points
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