/* DATA DESCRIPTION:
Citation:	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.971040
Abstract:	Sea ice surface roughness data were obtained during the TIFAX campaign in Jul, 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 Airplane (Basler BT-67, Polar-5). 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:	Krumpen, Thomas (2012): TIFAX 2012 Summer Campaign - Sea ice thickness measurements with Polar 5 from Station Nord and Svalbard. 10 pp, hdl:10013/epic.6e9bb068-dd33-49ff-8b7b-6cc02ec201e7
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: 82.516986 * MEDIAN LONGITUDE: -6.937161 * SOUTH-BOUND LATITUDE: 80.417454 * WEST-BOUND LONGITUDE: -15.030030 * NORTH-BOUND LATITUDE: 87.034983 * EAST-BOUND LONGITUDE: 4.018515
	DATE/TIME START: 2012-07-19T10:15:14 * DATE/TIME END: 2012-07-21T14:52:28
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Size:	12 datasets
*/
/* TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION: */
Filename	Citation of child dataset
TIFAX_2012_SBLA_20120719T1010_80.94_-9.94_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120719T1010_80.94_-9.94_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971036
TIFAX_2012_SBLA_20120719T1037_80.83_-4.77_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120719T1037_80.83_-4.77_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971035
TIFAX_2012_SBLA_20120719T1103_80.74_-0.98_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120719T1103_80.74_-0.98_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971034
TIFAX_2012_SBLA_20120720T0948_82.58_-14.99_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120720T0948_82.58_-14.99_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971038
TIFAX_2012_SBLA_20120720T1018_83.68_-15.00_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120720T1018_83.68_-15.00_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971039
TIFAX_2012_SBLA_20120720T1047_84.73_-14.99_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120720T1047_84.73_-14.99_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971030
TIFAX_2012_SBLA_20120720T1118_85.84_-15.00_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120720T1118_85.84_-15.00_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971032
TIFAX_2012_SBLA_20120720T1149_86.71_-15.00_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120720T1149_86.71_-15.00_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971028
TIFAX_2012_SBLA_20120721T1307_81.72_2.48_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120721T1307_81.72_2.48_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971029
TIFAX_2012_SBLA_20120721T1332_80.88_3.55_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120721T1332_80.88_3.55_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971033
TIFAX_2012_SBLA_20120721T1359_80.51_1.56_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120721T1359_80.51_1.56_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971037
TIFAX_2012_SBLA_20120721T1427_81.18_-0.09_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Jul, 2012; profile TIFAX_2012_SBLA_20120721T1427_81.18_-0.09_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.971031
