PANGAEA_990049 ANT 2023/24: AWI airborne ultra-wideband radar data between Sør Rondane Mountains and the eastern DML ice divide (CHARISO Project) Helm, Veit; Franke, Steven; Steinhage, Daniel; Eisen, Olaf; Zuhr, Alexandra; Bodart, Julien A; Sutter, Johannes ANT 2023/24: AWI airborne ultra-wideband radar data between Sør Rondane Mountains and the eastern DML ice divide (CHARISO Project) 2026-02-06 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.990049 Investigator Veit Helm Veit.Helm@awi.de Earth Science Season Event label Profile ID Instrument Radar product netCDF file netCDF file (File Size) GIS file Image geoscientificInformation Aircraft AWI UWB Dronning Maud Land East Antarctica Flight 10 Flight 12 ice divide Ice Sheet Internal Reflection Horizon P6_244_ANT_23_24_2312031001 P6_244_ANT_23_24_2312041201 P6-244_ANT_23_24 Polar 6 radio-echo sounding Sør Rondane Mountains Ultra-wideband radar (UWB), MCoRDS 5 POLAR 6 2023-12-03 2023-12-04 Complete -71.949031 -71.948998 23.298721 23.29891 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 350 data points text/tab-separated-values Eisen, Olaf; Steinhage, Daniel; Franke, Steven; Helm, Veit; Binder, Tobias; Drews, Reinhard; Eagles, Graeme; Humbert, Angelika; Jansen, Daniela; Jokat, Wilfried; Lambrecht, Astrid; Mieth, Matthias; Riedel, Sven; Miller, Heinrich (2024): Collection of datasets from AWI's radio-echo sounding systems on ice sheets and glaciers [dataset bibliography]. PANGAEA, https://doi.org/10.1594/PANGAEA.972094 O2A Registry: Metadata for radar system Ultra-wideband ice radar at current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, https://registry.o2a-data.de/items/6809 Bodart, Julien A; Sutter, Johannes (2025): Dated radar Internal Reflection Horizons (IRHs) from Dronning Maud Land (East Antarctica) for ice-sheet model calibration (Version V1) [dataset]. Zenodo, https://doi.org/10.5281/ZENODO.17348976

In 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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.990049"! ** 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 -- 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 -- Note that the surface picks were quality-checked for the standard product. For the qlook product only an auto-tracked surface pick is available.

https://doi.org/10.17815/jlsrf-2-153 POLAR 6 https://doi.org/10.5065/D6H70CW6 netCDF file https://doi.org/10.5065/D6H70CW6 netCDF file (File Size) https://doi.org/10.5281/ZENODO.17348976 Dated radar Internal Reflection Horizons (IRHs) from Dronning Maud Land (East Antarctica) for ice-sheet model calibration (Version V1) https://doi.pangaea.de/10.1594/PANGAEA.972094 Collection of datasets from AWI's radio-echo sounding systems on ice sheets and glaciers https://registry.o2a-data.de/items/6809 Metadata for radar system Ultra-wideband ice radar at current Version https://www.awi.de/en/about-us/organisation/staff/single-view/veit-helm.html DIF 9.4 2026-02-06 2026-04-30