Oraschewski, Falk M; Ershadi, M Reza; Drews, Reinhard (2025): Polarimetric wide-angle common midpoint pRES survey near central front of Ekström Ice Shelf, East Antarctica [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974475 (DOI registration in progress)
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Published: 2025-04-01
Abstract:
Glacial ice can be dielectrically anisotropic due to ice fabric anisotropy, which describes a preferred orientation of ice crystal lattices, as well as structural anisotropy in the upper firn layer. Direct observation of the vertical dielectric anisotropy with radar polarimetry requires wide-angle radar configurations that achieve oblique ray paths. This dataset comprises results of a polarimetric common midpoint (CMP) survey acquired with the (Autonomous) phase-sensitive Radio Echo Sounder (pRES) near the central front of Ekström ice shelf, Droning Maud Land, East Antarctica. The data were acquired on February 24, 2023, with logistic support from Neumayer III station (Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 2016). Transmitter and receiver were connected with 4 x 25 m coaxial cables, each. Antenna distances were increased from 10 m to 200 m in 2 m steps, with the CMP line being oriented toward magnetic north. At each posting three measurements (HH, VV, HV) were obtained, indicating parallel (H) and perpedicular (V) polarization of transmitter and receiver relative to the CMP line.
Keyword(s):
Supplement to:
Oraschewski, Falk M; Ershadi, M Reza; Drews, Reinhard (in review): Structural Firn Anisotropy Obscures Ice Fabric in Polarimetric Wide-Angle Radar. Geophysical Research Letters
Related to:
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (2016): Neumayer III and Kohnen Station in Antarctica operated by the Alfred Wegener Institute. Journal of large-scale research facilities JLSRF, 2, A85, https://doi.org/10.17815/jlsrf-2-152
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_ANT_18: ReMeltRadar
Coverage:
Latitude: -70.703127 * Longitude: -8.603937
Date/Time Start: 2023-02-24T15:19:00 * Date/Time End: 2023-02-24T18:27:00
Event(s):
Ekstroem_CMP_2023 * Latitude: -70.703127 * Longitude: -8.603937 * Date/Time Start: 2023-02-24T15:19:00 * Date/Time End: 2023-02-24T18:27:00 * Campaign: Neumayer_based * Basis: NEUMAYER III * Method/Device: Phase-sensitive radar (pRES)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Oraschewski, Falk M | |||
| 2 | Distance | Distance | m | Oraschewski, Falk M | Antenna distance | |
| 3 | Binary Object | Binary | Oraschewski, Falk M | Phase-sensitive radar (pRES) | HH (=> parallel (H) polarization of transmitter and receiver relative to the CMP profile) | |
| 4 | Binary Object (File Size) | Binary (Size) | Bytes | Oraschewski, Falk M | Phase-sensitive radar (pRES) | HH (=> parallel (H) polarization of transmitter and receiver relative to the CMP profile) |
| 5 | Binary Object | Binary | Oraschewski, Falk M | Phase-sensitive radar (pRES) | HV (=> parallel (H) and perpedicular (V) polarization of transmitter and receiver relative to the CMP profile) | |
| 6 | Binary Object (File Size) | Binary (Size) | Bytes | Oraschewski, Falk M | Phase-sensitive radar (pRES) | HV (=> parallel (H) and perpedicular (V) polarization of transmitter and receiver relative to the CMP profile) |
| 7 | Binary Object | Binary | Oraschewski, Falk M | Phase-sensitive radar (pRES) | VV (=> perpedicular (V) polarization of transmitter and receiver relative to the CMP profile) | |
| 8 | Binary Object (File Size) | Binary (Size) | Bytes | Oraschewski, Falk M | Phase-sensitive radar (pRES) | VV (=> perpedicular (V) polarization of transmitter and receiver relative to the CMP profile) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
480 data points