10.1594/PANGAEA.995616Steinhage, DanielDanielSteinhageAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenHelm, VeitVeitHelm0000-0001-7788-9328Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenPANGAEA2026AWI EMRGreenland ice coresGreenland ice sheetIce coreNGRIPNorthGRIP ice corePolar 2radio-echo soundingSeasonProfile IDInstrumentRadar productnetCDF filenetCDF file (File Size)GIS fileImageAircraftIce Thickness Radar radio-echo sounding RES [Nixdorf et al. 1999]NGRIP_1997POLAR 2North Greenland Ice Core Project (NGRIP)1997-05-20T00:00:00/1997-06-20T00:00:00Dataset10.1594/PANGAEA.97209410.5194/tc-20-2485-202610.2312/BzP_0336_199910.1016/S0926-9851(01)00062-310.3189/172756499781821346https://registry.o2a-data.de/items/6794266 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains airborne radar data acquired using the AWI EMR system (Nixdorf et al., 1999) during the Arctic season of 1997. The profiles extend in a grid around the North GRIP ice core site in central Greenland and in south-west Greenland. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams.Project PI: Daniel Steinhage (AWI)
Contact persons for AWI Radio-echo sounding data: Daniel Steinhage (daniel.steinhage@awi.de), Veit Helm (veit.helm@awi.de), Olaf Eisen (olaf.eisen@awi.de)
The data are available as netCDF files, KML files, and quicklook images (JPEGs) of the radargrams.
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The netCDF files contain the following variables:
altitude: Platform altitude (WGS84) in meters
bed_elevation: bed elevation for each trace (using no firn correction and permitivity of ice: 3.15) in meters
bed_pick: picked bed location for each trace, expressed as twt in seconds
data: radar data
data_agc: scaled radar data using automatic gain control (AGC)
distance: Along-track distance in meters
ice_thickness: ice thickness for each trace (using no firn correction and permitivity of ice: 3.15) in meters
lat: Latitude in decimal degrees
lon: Longitude in decimal degrees
range: Range between sensor and surface in meters
spacing: along track trace to trace spacing in meters
surface: surface elevation derived from radar (WGS84) in meters
surface_pick: picked surface reflection in two-way travel time in seconds
time: Seconds of day
twt: Two-way travel time (twt) in seconds
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The KML files are in EPSG:4326, and the quicklook images show the AGC product of the radargram.-53.252098-42.31657865.40659375.095619Davis StraitGreenland