This dataset contains airborne radar data acquired using the AWI ultra-wideband microwave radar (UWBM) during the Antarctic season of 2022/23 (December 5th, 2022). The profiles extend across Atka Bay's snow-covered landfast sea ice in western Dronning Maud Land, East Antarctica. UWBM data was acquired to study snow drifts around icebergs and their radar signatures with a quad-polarized high-resolution radar system. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams. For every profile we provide four radar products (img_01, img_02, img_03, img_04), which correspond to the four polarizations (VV, VH, HH, HV).

AWI Flight Campaign: P5-238_ANTSI_2022Project: ANTSI (ANTarctic Sea Ice and platelet ice survey)Region: Atka Bay's landfast sea ice, Dronning Maud Land, East Antarctica--Data Owner/Correspondence:Christian Haas (Alfred Wegener Institut Bremerhaven, Germany), Contact: christian.haas@awi.deVeit Helm (Alfred Wegener Institut Bremerhaven, Germany), Contact: veit.helm@awi.de--Instrument used: AWI UWBMData products: CSARP_qlook (unfocussed)Method of navigation : GPS data was acquired by four NovAtel DL-V3 GPS receivers operating at 20Hz--The four radar products correspond to the following polarizations:img_01 = VVimg_02 = VH (V receiver, H transmit)img_03 = HHimg_04 = HV (H receiver, V transmit)--The netCDF files contain the following variables:altitude: Platform altitude (WGS84) in metersbed_elevation: Bed elevation for each trace (without applying a firn correction and permitivity of ice: 3.15) in metersbed_pick: picked Bed location for each trace, expressed as twt in seconds from time zerodata: Radar data (Values in dBm after DC conversion)data_agc: Scaled radar data using automatic gain control (AGC)distance: Along-track distance in metersice_thickness: Ice thickness for each trace (without applying a firn correction and permitivity of ice: 3.15) in meterslat: Latitude in decimal degrees (WGS84)lon: Longitude in decimal degrees (WGS84)range: Range between sensor and surface in metersspacing: Along-track trace to trace spacing in meterssurface: Surface elevation derived from radar (WGS84) in meterssurface_pick: Picked surface reflection in two-way travel time in secondstime: Seconds of daytwt: Two-way travel time (twt) in seconds