Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar
This dissertation discusses the waveform design, the development of SAR and clutter reduction algorithms for MCRDS radars that are developed at CReSIS to map the ice-sheet bed, deep internal layers and fast-flowing outlet glaciers. It is verified with survey data that the sidelobe level of the desig...
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University of Kansas
2009
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Online Access: | http://hdl.handle.net/1808/5666 http://dissertations.umi.com/ku:10690 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/5666 2023-05-15T16:40:12+02:00 Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar Li, Jilu Gogineni, Sivaprasad Leuschen, Carl Rodriguez-Morales, Fernando Seguin, Sarah Braaten, David 2009 200 pages http://hdl.handle.net/1808/5666 http://dissertations.umi.com/ku:10690 EN eng University of Kansas http://dissertations.umi.com/ku:10690 http://hdl.handle.net/1808/5666 This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author. openAccess Electronics and electrical engineering Remote sensing Airborne radar Fast outlet glaciers Ice clutter reduction Ice sheet mapping Sar processing Sidelobe suppression Dissertation 2009 ftunivkansas 2022-08-26T13:10:19Z This dissertation discusses the waveform design, the development of SAR and clutter reduction algorithms for MCRDS radars that are developed at CReSIS to map the ice-sheet bed, deep internal layers and fast-flowing outlet glaciers. It is verified with survey data that the sidelobe level of the designed tapered linear chirp waveform is lower than -60dB for reliable detection of deep ice layers close to the bed. The SAR processing is implemented in f-k domain with motion compensation. Very weak echoes from the deepest parts of Jakobshavn channel are detected for the first time using large synthetic aperture length. A beam-spaced clutter-reduction algorithm is developed to reduce the distributed across-track ice clutter encountered in sounding fast outlet glaciers by estimating the clutter power as a function of depth. On average this method is able to reduce ice clutter by 10dB over Hanning weighting with the MCRDS radar's multi-channel data. Doctoral or Postdoctoral Thesis Ice Sheet Jakobshavn The University of Kansas: KU ScholarWorks |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
English |
topic |
Electronics and electrical engineering Remote sensing Airborne radar Fast outlet glaciers Ice clutter reduction Ice sheet mapping Sar processing Sidelobe suppression |
spellingShingle |
Electronics and electrical engineering Remote sensing Airborne radar Fast outlet glaciers Ice clutter reduction Ice sheet mapping Sar processing Sidelobe suppression Li, Jilu Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
topic_facet |
Electronics and electrical engineering Remote sensing Airborne radar Fast outlet glaciers Ice clutter reduction Ice sheet mapping Sar processing Sidelobe suppression |
description |
This dissertation discusses the waveform design, the development of SAR and clutter reduction algorithms for MCRDS radars that are developed at CReSIS to map the ice-sheet bed, deep internal layers and fast-flowing outlet glaciers. It is verified with survey data that the sidelobe level of the designed tapered linear chirp waveform is lower than -60dB for reliable detection of deep ice layers close to the bed. The SAR processing is implemented in f-k domain with motion compensation. Very weak echoes from the deepest parts of Jakobshavn channel are detected for the first time using large synthetic aperture length. A beam-spaced clutter-reduction algorithm is developed to reduce the distributed across-track ice clutter encountered in sounding fast outlet glaciers by estimating the clutter power as a function of depth. On average this method is able to reduce ice clutter by 10dB over Hanning weighting with the MCRDS radar's multi-channel data. |
author2 |
Gogineni, Sivaprasad Leuschen, Carl Rodriguez-Morales, Fernando Seguin, Sarah Braaten, David |
format |
Doctoral or Postdoctoral Thesis |
author |
Li, Jilu |
author_facet |
Li, Jilu |
author_sort |
Li, Jilu |
title |
Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
title_short |
Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
title_full |
Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
title_fullStr |
Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
title_full_unstemmed |
Mapping of Ice Sheet Deep Layers and Fast Outlet Glaciers with Multi-Channel-High-Sensitivity Radar |
title_sort |
mapping of ice sheet deep layers and fast outlet glaciers with multi-channel-high-sensitivity radar |
publisher |
University of Kansas |
publishDate |
2009 |
url |
http://hdl.handle.net/1808/5666 http://dissertations.umi.com/ku:10690 |
genre |
Ice Sheet Jakobshavn |
genre_facet |
Ice Sheet Jakobshavn |
op_relation |
http://dissertations.umi.com/ku:10690 http://hdl.handle.net/1808/5666 |
op_rights |
This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author. openAccess |
_version_ |
1766030583549394944 |