Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry
Single-pass interferometric synthetic aperture radar (InSAR) enables the possibility for sea ice topographic retrieval despite the inherent dynamics of sea ice. InSAR digital elevation models (DEMs) are measuring the radar scattering center height. The height bias induced by the penetration of elect...
Published in: | The Cryosphere |
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00059001 2023-05-15T13:37:33+02:00 Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry Huang, Lanqing Fischer, Georg Hajnsek, Irena 2021-12 electronic https://doi.org/10.5194/tc-15-5323-2021 https://noa.gwlb.de/receive/cop_mods_00059001 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058609/tc-15-5323-2021.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-5323-2021 https://noa.gwlb.de/receive/cop_mods_00059001 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058609/tc-15-5323-2021.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-5323-2021 2022-02-08T22:32:49Z Single-pass interferometric synthetic aperture radar (InSAR) enables the possibility for sea ice topographic retrieval despite the inherent dynamics of sea ice. InSAR digital elevation models (DEMs) are measuring the radar scattering center height. The height bias induced by the penetration of electromagnetic waves into snow and ice leads to inaccuracies of the InSAR DEM, especially for thick and deformed sea ice with snow cover. In this study, an elevation difference between the satellite-measured InSAR DEM and the airborne-measured optical DEM is observed from a coordinated campaign over the western Weddell Sea in Antarctica. The objective is to correct the penetration bias and generate a precise sea ice topographic map from the single-pass InSAR data. With the potential of retrieving sea ice geophysical information by the polarimetric-interferometry (Pol-InSAR) technique, a two-layer-plus-volume model is proposed to represent the sea ice vertical structure and its scattering mechanisms. Furthermore, a simplified version of the model is derived, to allow its inversion with limited a priori knowledge, which is then applied to a topographic retrieval scheme. The experiments are performed across four polarizations: HH, VV, Pauli 1 (HH + VV), and Pauli 2 (HH − VV). The model-retrieved performance is validated with the optically derived DEM of the sea ice topography, showing an excellent performance with root-mean-square error as low as 0.26 m in Pauli-1 (HH + VV) polarization. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea Niedersächsisches Online-Archiv NOA Antarctic Weddell Sea Weddell The Cryosphere 15 12 5323 5344 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Huang, Lanqing Fischer, Georg Hajnsek, Irena Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
topic_facet |
article Verlagsveröffentlichung |
description |
Single-pass interferometric synthetic aperture radar (InSAR) enables the possibility for sea ice topographic retrieval despite the inherent dynamics of sea ice. InSAR digital elevation models (DEMs) are measuring the radar scattering center height. The height bias induced by the penetration of electromagnetic waves into snow and ice leads to inaccuracies of the InSAR DEM, especially for thick and deformed sea ice with snow cover. In this study, an elevation difference between the satellite-measured InSAR DEM and the airborne-measured optical DEM is observed from a coordinated campaign over the western Weddell Sea in Antarctica. The objective is to correct the penetration bias and generate a precise sea ice topographic map from the single-pass InSAR data. With the potential of retrieving sea ice geophysical information by the polarimetric-interferometry (Pol-InSAR) technique, a two-layer-plus-volume model is proposed to represent the sea ice vertical structure and its scattering mechanisms. Furthermore, a simplified version of the model is derived, to allow its inversion with limited a priori knowledge, which is then applied to a topographic retrieval scheme. The experiments are performed across four polarizations: HH, VV, Pauli 1 (HH + VV), and Pauli 2 (HH − VV). The model-retrieved performance is validated with the optically derived DEM of the sea ice topography, showing an excellent performance with root-mean-square error as low as 0.26 m in Pauli-1 (HH + VV) polarization. |
format |
Article in Journal/Newspaper |
author |
Huang, Lanqing Fischer, Georg Hajnsek, Irena |
author_facet |
Huang, Lanqing Fischer, Georg Hajnsek, Irena |
author_sort |
Huang, Lanqing |
title |
Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
title_short |
Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
title_full |
Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
title_fullStr |
Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
title_full_unstemmed |
Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
title_sort |
antarctic snow-covered sea ice topography derivation from tandem-x using polarimetric sar interferometry |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-5323-2021 https://noa.gwlb.de/receive/cop_mods_00059001 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058609/tc-15-5323-2021.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf |
geographic |
Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-5323-2021 https://noa.gwlb.de/receive/cop_mods_00059001 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058609/tc-15-5323-2021.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-15-5323-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
12 |
container_start_page |
5323 |
op_container_end_page |
5344 |
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1766093922076983296 |