/* DATA DESCRIPTION:
Citation:	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.970602
Abstract:	Sea ice surface roughness data were obtained during the TIFAX campaign in Aug, 2017 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by an Airplane (Basler BT-67, Polar-6). 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; Sellmann, Manuel; Rohde, Jan (2017): TIFAX 2017 Campaign Report: Sea ice thickness measurements with Polar 6 from Station Nord and Alert. 26 pp, hdl:10013/epic.51536.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: 83.873936 * MEDIAN LONGITUDE: -15.674528 * SOUTH-BOUND LATITUDE: 80.797054 * WEST-BOUND LONGITUDE: -56.169559 * NORTH-BOUND LATITUDE: 88.741401 * EAST-BOUND LONGITUDE: 24.986841
	DATE/TIME START: 2017-08-13T14:57:28 * DATE/TIME END: 2017-08-22T12:38:12
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Size:	19 datasets
*/
/* TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION: */
Filename	Citation of child dataset
P6_207_TIFAX_2017_SBLA_20170813T1455_83.70_-16.67_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170813T1455_83.70_-16.67_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970600
P6_207_TIFAX_2017_SBLA_20170813T1548_83.86_-18.39_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170813T1548_83.86_-18.39_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970601
P6_207_TIFAX_2017_SBLA_20170819T1236_83.53_-46.56_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1236_83.53_-46.56_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970584
P6_207_TIFAX_2017_SBLA_20170819T1302_83.64_-53.37_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1302_83.64_-53.37_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970583
P6_207_TIFAX_2017_SBLA_20170819T1341_83.91_-51.85_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1341_83.91_-51.85_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970587
P6_207_TIFAX_2017_SBLA_20170819T1416_84.61_-41.28_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1416_84.61_-41.28_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970588
P6_207_TIFAX_2017_SBLA_20170819T1452_85.13_-28.69_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1452_85.13_-28.69_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970585
P6_207_TIFAX_2017_SBLA_20170819T1523_85.75_-24.72_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1523_85.75_-24.72_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970586
P6_207_TIFAX_2017_SBLA_20170819T1550_86.64_-24.89_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1550_86.64_-24.89_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970591
P6_207_TIFAX_2017_SBLA_20170819T1615_87.24_-25.52_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170819T1615_87.24_-25.52_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970589
P6_207_TIFAX_2017_SBLA_20170820T1210_82.50_-13.64_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1210_82.50_-13.64_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970590
P6_207_TIFAX_2017_SBLA_20170820T1232_82.52_-6.64_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1232_82.52_-6.64_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970592
P6_207_TIFAX_2017_SBLA_20170820T1259_82.50_1.86_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1259_82.50_1.86_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970594
P6_207_TIFAX_2017_SBLA_20170820T1330_82.52_11.89_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1330_82.52_11.89_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970595
P6_207_TIFAX_2017_SBLA_20170820T1408_82.52_21.58_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1408_82.52_21.58_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970593
P6_207_TIFAX_2017_SBLA_20170820T1449_82.09_17.46_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1449_82.09_17.46_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970596
P6_207_TIFAX_2017_SBLA_20170820T1535_81.58_10.68_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1535_81.58_10.68_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970597
P6_207_TIFAX_2017_SBLA_20170820T1602_81.00_6.26_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170820T1602_81.00_6.26_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970599
P6_207_TIFAX_2017_SBLA_20170822T1210_88.30_-16.76_thr06_data_Vers5.tab	Krumpen, Thomas; Haas, Christian; Hendricks, Stefan (2024): Laser altimeter data obtained over sea-ice during the TIFAX campaign in Aug, 2017; profile P6_207_TIFAX_2017_SBLA_20170822T1210_88.30_-16.76_thr06_data_Vers5. https://doi.org/10.1594/PANGAEA.970598
