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...
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ftdlr:oai:elib.dlr.de:148631 2023-05-15T13:51:36+02:00 Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry Huang, Lanqing Fischer, Georg Hajnsek, Irena 2021-12-02 application/pdf https://elib.dlr.de/148631/ https://elib.dlr.de/148631/1/tc-16-1-2022.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021-discussion.html en eng Copernicus Publications https://elib.dlr.de/148631/1/tc-16-1-2022.pdf Huang, Lanqing und Fischer, Georg und Hajnsek, Irena (2021) Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry. The Cryosphere, 15 (12), Seiten 5323-5344. Copernicus Publications. doi:10.5194/tc-15-5323-2021 <https://doi.org/10.5194/tc-15-5323-2021>. ISSN 1994-0416. Radarkonzepte Zeitschriftenbeitrag PeerReviewed 2021 ftdlr https://doi.org/10.5194/tc-15-5323-2021 2023-01-02T00:14:28Z 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. Other Non-Article Part of Journal/Newspaper Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea German Aerospace Center: elib - DLR electronic library Antarctic Weddell Weddell Sea The Cryosphere 15 12 5323 5344 |
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German Aerospace Center: elib - DLR electronic library |
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English |
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Radarkonzepte |
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Radarkonzepte Huang, Lanqing Fischer, Georg Hajnsek, Irena Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
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Radarkonzepte |
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 |
Other Non-Article Part of 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://elib.dlr.de/148631/ https://elib.dlr.de/148631/1/tc-16-1-2022.pdf https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021-discussion.html |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Sea ice The Cryosphere Weddell Sea |
op_relation |
https://elib.dlr.de/148631/1/tc-16-1-2022.pdf Huang, Lanqing und Fischer, Georg und Hajnsek, Irena (2021) Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry. The Cryosphere, 15 (12), Seiten 5323-5344. Copernicus Publications. doi:10.5194/tc-15-5323-2021 <https://doi.org/10.5194/tc-15-5323-2021>. ISSN 1994-0416. |
op_doi |
https://doi.org/10.5194/tc-15-5323-2021 |
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The Cryosphere |
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15 |
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12 |
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5323 |
op_container_end_page |
5344 |
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