Direction-of-Arrival Analysis of Airborne Ice Depth Sounder Data

Ulrik Nielsen, Jie-Bang Yan, Sivaprasad Gogineni, Jørgen Dall

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Abstract

In this paper, we analyze the direction-of arrival(DOA) of the ice-sheet data collected over Jakobshavn Glacier with the airborne Multichannel Radar Depth Sounder (MCRDS) during the 2006 field season. We extracted weak ice–bed echoes buried in signals scattered by the rough surface of the fast-flowing Jakobshavn Glacier by analyzing the DOA of signals received with a five-element receive-antenna array. This allowed us to obtain ice thickness information, which is a key parameter when generating bed topography of glaciers. We also estimated ice–bed roughness and bed slope from the combined analysis of the DOA and radar waveforms. The bed slope is about 8° and the roughness in terms of rms slope is about 16°.
Original languageEnglish
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume55
Issue number4
Pages (from-to)2239 - 2249
ISSN0196-2892
DOIs
Publication statusPublished - 2017

Keywords

  • Airborne radar
  • Direction-of-arrival (DOA) estimation
  • Glacier
  • Ice sounding
  • Radar remote sensing
  • Surface scattering

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