10.1594/PANGAEA.991465Helm, VeitVeitHelm0000-0001-7788-9328Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenSteinhage, DanielDanielSteinhageAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenEagles, GraemeGraemeEagles0000-0001-5325-0810Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenFranke, StevenStevenFranke0000-0001-8462-4379Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenEisen, OlafOlafEisen0000-0002-6380-962XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenBodart, Julien AJulien ABodart0000-0002-8237-0675University of BernSutter, JohannesJohannesSutter0000-0002-3357-2633University of BernPANGAEA2026AWI UWBDronning Maud LandEast AntarcticaIce SheetInternal Reflection HorizonPolar 6radio-echo soundingSør Rondane MountainsSeasonEvent labelProfile IDInstrumentRadar productnetCDF filenetCDF file (File Size)GIS fileImageAircraftUltra-wideband radar (UWB), MCoRDS 5P6-255_ANT_2024_2025POLAR 62024-12-14T09:59:34/2025-01-07T18:58:10Dataset10.1594/PANGAEA.97209410.5194/tc-20-2485-2026https://registry.o2a-data.de/items/680910.5281/ZENODO.17348976630 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalIn the Antarctic austral summer season of 2024/25 AWI ultra-wideband (UWB) data was acquired across prominent ice-streams draining parts of the DML region as part of the CHARISO (Swiss (CH) Antarctic Research Initiative - ISOchrones in East Antarctic outflow regions) project, providing an opportunity to trace isochrones there and compare their pattern with modelled isochrones from ice-sheet modelling. The data were further used to the existing AWI UWB radar profiles from the ANT 2023/24 CHARISO season and were recorded in a frequency range between 150-520 MHz. The data are available for both data products (qlook: unfocused; standard: SAR focused) as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams.Project: CHARISO (Isochrones in East Antarctic outflow regions; Swiss Antarctic Research Initiative)
Region: Antarctica, Dronning Maud Land, South of Sør Rondane Mountains

Owner / PI: Olaf Eisen (AWI)
CHARISO PI: Johannes Sutter (Uni Bern - johannes.sutter@unibe.ch)

Email address of the provider:
olaf.eisen@awi.de
veit.helm@awi.de

Instrument used: AWI UWB (MCoRDS 5)
Data products: CSARP_standard (SAR focussed), CSARP_qlook (unfocussed)
Data product documentation: https://data.cresis.ku.edu/data/rds/rds_readme.pdf
Method of navigation : GPS data was acquired by four NovAtel DL-V3 GPS receivers operating at 20Hz
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The netCDF files contain the following variables:
altitude: Platform altitude (WGS84) in meters
bed_elevation: Bed elevation for each trace (without applying a firn correction and permitivity of ice: 3.15) in meters
bed_pick: picked Bed location for each trace, expressed as twt in seconds from time zero
data: Radar data (Values in dBm after DC conversion)
data_agc: Scaled radar data using automatic gain control (AGC)
distance: Along-track distance in meters
ice_thickness: Ice thickness for each trace (without applying a firn correction and permitivity of ice: 3.15) in meters
lat: Latitude in decimal degrees (WGS84)
lon: Longitude in decimal degrees (WGS84)
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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Note that the surface picks were quality-checked for the standard product. For the qlook product only an auto-tracked surface pick is available.23.29773123.298313-71.948997-71.94894Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhavenhttps://doi.org/10.13039/501100003207AWI_PA_02145P6-244_ANT_23_24, CHARISO, P6-255_ANT_2024_2025