10.1594/PANGAEA.990049Helm, VeitVeitHelm0000-0001-7788-9328Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenFranke, StevenStevenFranke0000-0001-8462-4379Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenSteinhage, DanielDanielSteinhageAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenEisen, OlafOlafEisen0000-0002-6380-962XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenZuhr, AlexandraAlexandraZuhr0000-0002-3861-365XUniversity of TübingenBodart, Julien AJulien ABodart0000-0002-8237-0675University of BernSutter, JohannesJohannesSutter0000-0002-3357-2633University of BernPANGAEA2026AWI UWBDronning Maud LandEast Antarcticaice divideIce SheetInternal Reflection HorizonPolar 6radio-echo soundingSør Rondane MountainsSeasonEvent labelProfile IDInstrumentRadar productnetCDF filenetCDF file (File Size)GIS fileImageAircraftUltra-wideband radar (UWB), MCoRDS 5P6-244_ANT_23_24POLAR 62023-12-03T07:05:13/2023-12-04T11:45:46Dataset10.1594/PANGAEA.972094https://registry.o2a-data.de/items/680910.5281/ZENODO.17348976350 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalIn the Antarctic austral summer season of 2023/24 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 extend the layering across existing AWI DML lines in the upper section near the ice divide, and over the main ice divide to link up specific isochrones with the EDML and Dome Fuji ice cores and were recorded in a frequency range between 180-210 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.23.29872123.29891-71.949031-71.948998Alfred 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