/* DATA DESCRIPTION:
Citation:	Hendricks, Stefan; Haas, Christian; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2007 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.970957
Abstract:	Sea ice surface roughness data were obtained during the SIZONet campaign in Apr, 2007 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 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 .
Keyword(s):	Laser Altimeter; Ridge Height; Ridge Spacing; Ridge Width; Sea Ice Surface Roughness
Supplement to:	Krumpen, Thomas; von Albedyll, Luisa; Bünger, Hans Jakob; Castellani, Giulia; Hartmann, Jörg; Helm, Veit; Hendricks, Stefan; Hutter, Nils; Landy, Jack; Lisovski, Simeon; Lüpkes, Christof; Rohde, Jan; Suhrhoff, Mira; Haas, Christian (2025): Smoother sea ice with fewer pressure ridges in a more dynamic Arctic. Nature Climate Change, https://doi.org/10.1038/s41558-024-02199-5
Related to:	Hendricks, Stefan; Haas, Christian; Rabenstein, Lasse; Martin, Torge (2008): Airborne sea ice thickness measurements in 2007 and 2008. SEDNA Science Workshop., hdl:10013/epic.33189.d001
Related code / software:	Electromagnetic induction sounding of sea-ice thickness / SBLA_Processing · GitLab (URI: https://gitlab.awi.de/sitem/sbla_processing.git)
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 [thesis]. Universität Trier, hdl:10013/epic.30c63deb-b1f5-4c1e-927b-3d8a8d495b82
Coverage:	MEDIAN LATITUDE: 71.899949 * MEDIAN LONGITUDE: -153.950454 * SOUTH-BOUND LATITUDE: 71.706959 * WEST-BOUND LONGITUDE: -154.915270 * NORTH-BOUND LATITUDE: 72.173935 * EAST-BOUND LONGITUDE: -152.515400
	DATE/TIME START: 2007-04-14T22:12:00 * DATE/TIME END: 2007-04-14T23:51:17
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	4 datasets
*/
/* TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION: */
Filename	Citation of child dataset
SIZONet2007_SBLA_20070414T2211_71.76_-154.69_thr06_data_Vers5.tab	Hendricks, Stefan; Haas, Christian; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2007; profile SIZONet2007_SBLA_20070414T2211_71.76_-154.69_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970953
SIZONet2007_SBLA_20070414T2224_71.92_-153.89_thr06_data_Vers5.tab	Hendricks, Stefan; Haas, Christian; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2007; profile SIZONet2007_SBLA_20070414T2224_71.92_-153.89_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970955
SIZONet2007_SBLA_20070414T2310_72.10_-152.92_thr06_data_Vers5.tab	Hendricks, Stefan; Haas, Christian; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2007; profile SIZONet2007_SBLA_20070414T2310_72.10_-152.92_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970954
SIZONet2007_SBLA_20070414T2331_71.84_-154.25_thr06_data_Vers5.tab	Hendricks, Stefan; Haas, Christian; Krumpen, Thomas (2024): Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2007; profile SIZONet2007_SBLA_20070414T2331_71.84_-154.25_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970956
