Krumpen, Thomas; Haas, Christian; Hendricks, Stefan: Laser altimeter data obtained over sea-ice during the Transdrift-XIII campaign in Apr-May, 2008 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.969296 (dataset in review)
Abstract:
Sea ice surface roughness data were obtained during the Transdrift-XIII campaign in Apr-May, 2008 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]
Coverage:
Median Latitude: 74.467033 * Median Longitude: 127.832242 * South-bound Latitude: 73.917428 * West-bound Longitude: 125.277220 * North-bound Latitude: 74.818414 * East-bound Longitude: 130.434360
Date/Time Start: 2008-04-14T06:29:47 * Date/Time End: 2008-05-05T04:36:57
Event(s):
Transdrift-XIII_SBLA_20080414T062947 * Latitude Start: 74.698467 * Longitude Start: 130.434360 * Latitude End: 74.718377 * Longitude End: 129.936490 * Date/Time Start: 2008-04-14T06:29:47 * Date/Time End: 2008-04-14T06:36:29 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XIII * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Transdrift-XIII_SBLA_20080414T064009 * Latitude Start: 74.727645 * Longitude Start: 129.652960 * Latitude End: 74.744187 * Longitude End: 129.174720 * Date/Time Start: 2008-04-14T06:40:09 * Date/Time End: 2008-04-14T06:46:25 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XIII * Basis: Helicopter * Method/Device: Single beam laser altimeter (SBLA)
Transdrift-XIII_SBLA_20080414T065646 * Latitude Start: 74.776574 * Longitude Start: 128.400430 * Latitude End: 74.805268 * Longitude End: 127.643160 * Date/Time Start: 2008-04-14T06:56:46 * Date/Time End: 2008-04-14T07:07:10 * Sensor URI: registry.o2a-data.de * Campaign: Transdrift-XIII * 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:
2071473 data points
Download Data (login required)
View dataset as HTML (shows only first 2000 rows)