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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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/tc-15-5323-2021 https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://doaj.org/article/6901d0612d964426b0b61dc74dc3b538 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6901d0612d964426b0b61dc74dc3b538 2023-05-15T13:42:32+02:00 Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry L. Huang G. Fischer I. Hajnsek 2021-12-01 https://doi.org/10.5194/tc-15-5323-2021 https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://doaj.org/article/6901d0612d964426b0b61dc74dc3b538 en eng Copernicus Publications doi:10.5194/tc-15-5323-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://doaj.org/article/6901d0612d964426b0b61dc74dc3b538 undefined The Cryosphere, Vol 15, Pp 5323-5344 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-5323-2021 2023-01-22T18:11:02Z 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 Unknown Antarctic Weddell Weddell Sea The Cryosphere 15 12 5323 5344 |
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English |
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geo envir L. Huang G. Fischer I. Hajnsek Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry |
topic_facet |
geo envir |
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 |
L. Huang G. Fischer I. Hajnsek |
author_facet |
L. Huang G. Fischer I. Hajnsek |
author_sort |
L. Huang |
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://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://doaj.org/article/6901d0612d964426b0b61dc74dc3b538 |
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_source |
The Cryosphere, Vol 15, Pp 5323-5344 (2021) |
op_relation |
doi:10.5194/tc-15-5323-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/5323/2021/tc-15-5323-2021.pdf https://doaj.org/article/6901d0612d964426b0b61dc74dc3b538 |
op_rights |
undefined |
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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1766169065978593280 |