Haas, Christian; Hendricks, Stefan; Krumpen, Thomas: Laser altimeter data obtained over sea-ice during the PS87 campaign in Aug-Sep, 2014 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.969304 (dataset in review)
Abstract:
Sea ice surface roughness data were obtained during the PS87 campaign in Aug-Sep, 2014 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 (RV-Polarstern Helicopter). 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 20140903T0557. 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: 86.387087 * Median Longitude: -63.074753 * South-bound Latitude: 83.448733 * West-bound Longitude: 158.946870 * North-bound Latitude: 88.941273 * East-bound Longitude: -0.727319
Date/Time Start: 2014-08-11T10:51:12 * Date/Time End: 2014-09-03T06:17:32
Event(s):
PS87_SBLA_20140811T105112 * Latitude Start: 84.635342 * Longitude Start: -1.859747 * Latitude End: 84.807227 * Longitude End: -1.632108 * Date/Time Start: 2014-08-11T10:51:12 * Date/Time End: 2014-08-11T10:58:18 * Sensor URI: registry.o2a-data.de * Campaign: PS87 (ARK-XXVIII/4 ALEX2014) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
PS87_SBLA_20140811T110618 * Latitude Start: 84.892960 * Longitude Start: -1.360684 * Latitude End: 85.032846 * Longitude End: -3.788125 * Date/Time Start: 2014-08-11T11:06:18 * Date/Time End: 2014-08-11T11:30:53 * Sensor URI: registry.o2a-data.de * Campaign: PS87 (ARK-XXVIII/4 ALEX2014) * Basis: Polarstern * Method/Device: Single beam laser altimeter (SBLA)
PS87_SBLA_20140811T113322 * Latitude Start: 85.035050 * Longitude Start: -3.927360 * Latitude End: 84.823347 * Longitude End: -5.698349 * Date/Time Start: 2014-08-11T11:33:22 * Date/Time End: 2014-08-11T11:55:36 * Sensor URI: registry.o2a-data.de * Campaign: PS87 (ARK-XXVIII/4 ALEX2014) * Basis: Polarstern * 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:
4687720 data points
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