GEM-2 combined snow and ice thickness within the laser scanning area on station PS81/517_GPS1 ...

• Main Authors: Wever, Nander, White, Seth, Hunkeler, Priska A, Maksym, Ted, Leonard, Katherine C
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Cartesian coordinate, x; Cartesian coordinate, y; Sea ice and snow thickness; Global positioning system; Ground-based Electromagnetic Induction Sounding Device, GEM-2; ANT-XXIX/6; Polarstern; Wever; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.933564; https://doi.pangaea.de/10.1594/PANGAEA.933564

Combined snow and ice thickness from a multifrequency electromagnetic induction instrument (GEM-2) in the terrestrial laser scanning (TLS) area, see Hunkeler et al. (2015) for details. GEM-2 was performed inside the laser scan field after all scans had been acquired. ... : Coordinates:============X and Y coordinates are relative to a GPS base station installed on each floe. Coordinates were determined using post-processing kinematic GPS (PPK-GPS), and corrected for floe ration and drift. Coordinates of measurements inside the laser scanning area were particularly carefully processed to collocate measurements as accurately as possible (within a few cm). The vertical height above sea level in the TLS data was determined by using reflectors on poles. Upon installation of these reflector poles, the ice was drilled through and the height of the reflector above sea level was determined. For details, see Wever et al. (2021).On the floe scale walk, magnaprobe coordinates have been equally processed as in the laser scanning area. However, for the GEM-2 instrument, the position of the magnaprobe was taken for the corresponding time stamp in the GEM-2 data. Since the GEM-2 instrument was following the Magnaprobe surveyor with a few m distance, this leads to less precise positioning. ...