This dataset contains airborne radar data acquired using the AWI ultra-wideband microwave radar (UWBM) during the Arctic season of 2017 (2.-8. April 2017). The profiles extend over sea ice in the Beaufort and Chukchi Seas in the western Arctic as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMiP). The data were utilized to derive snow freeboard and snow depth measurements. The AWI UWBM radar operated in a quad-polarized high-resolution mode. 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).

Project: PAMARCMiP 2017 (Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project)Region: Beaufort and Chukchi Seas in the western ArcticData Owner/Correspondence:Christian Haas (Alfred Wegener Institut Bremerhaven, Germany), Contact: christian.haas@awi.deStefan Hendricks (Alfred Wegener Institut Bremerhaven, Germany), Contact: stefan.hendricks@awi.deVeit Helm (Alfred Wegener Institut Bremerhaven, Germany), Contact: veit.helm@awi.deInstrument 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