Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland

Different approaches have been proposed in recent years to map glacier zones using Synthetic Aperture Radar (SAR). Most of them rely on empirical or statistical approaches for the interpretation of backscatter intensity measurements and their seasonal variations related to the melting regime of the...

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Autores principales:	Giuseppe Parrella, Irena Hajnsek, Konstantinos P. Papathanassiou
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Firn line glacier zones Greenland polarimetric synthetic aperture radar (SAR) polarization phase difference Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/f1b1892f86334a29a9f02165c4de81d8
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spelling	oai:doaj.org-article:f1b1892f86334a29a9f02165c4de81d82021-11-25T00:00:07ZModel-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland2151-153510.1109/JSTARS.2021.3126069https://doaj.org/article/f1b1892f86334a29a9f02165c4de81d82021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9609650/https://doaj.org/toc/2151-1535Different approaches have been proposed in recent years to map glacier zones using Synthetic Aperture Radar (SAR). Most of them rely on empirical or statistical approaches for the interpretation of backscatter intensity measurements and their seasonal variations related to the melting regime of the different glacier zones. This article focuses on the potential of polarimetric SAR measurements to characterize the scattering in the different glacier zones in order to distinguish between them. For this, a general two-component scattering model is proposed, accounting for surface and subsurface contributions in the different glacier zones. The (anisotropic) propagation through snow, firn, and ice layers is also accounted for as it plays an important role in the interpretation of the polarimetric signatures. A set of five polarimetric descriptors is proposed to describe the projection of the model on the SAR measurements. The ability of the model to characterize the scattering in the different glacier zones is validated and discussed at different frequencies (X-, C-, and L-band). For this, a multifrequency airborne SAR dataset acquired by the DLR's F-SAR sensor in West Greenland during the ARCTIC 2015 campaign is used. The achieved results indicate that L-band polarimetric measurements allow to differentiate the different glacier zones based on the subsurface (e.g., volume) scattering characteristics. In contrast, the increased (back-) scattering complexity and the reduced penetration capability limit the potential of X- and C-band polarimetric measurements.Giuseppe ParrellaIrena HajnsekKonstantinos P. PapathanassiouIEEEarticleFirn lineglacier zonesGreenlandpolarimetric synthetic aperture radar (SAR)polarization phase differenceOcean engineeringTC1501-1800Geophysics. Cosmic physicsQC801-809ENIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11593-11607 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Firn line glacier zones Greenland polarimetric synthetic aperture radar (SAR) polarization phase difference Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
spellingShingle	Firn line glacier zones Greenland polarimetric synthetic aperture radar (SAR) polarization phase difference Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Giuseppe Parrella Irena Hajnsek Konstantinos P. Papathanassiou Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
description	Different approaches have been proposed in recent years to map glacier zones using Synthetic Aperture Radar (SAR). Most of them rely on empirical or statistical approaches for the interpretation of backscatter intensity measurements and their seasonal variations related to the melting regime of the different glacier zones. This article focuses on the potential of polarimetric SAR measurements to characterize the scattering in the different glacier zones in order to distinguish between them. For this, a general two-component scattering model is proposed, accounting for surface and subsurface contributions in the different glacier zones. The (anisotropic) propagation through snow, firn, and ice layers is also accounted for as it plays an important role in the interpretation of the polarimetric signatures. A set of five polarimetric descriptors is proposed to describe the projection of the model on the SAR measurements. The ability of the model to characterize the scattering in the different glacier zones is validated and discussed at different frequencies (X-, C-, and L-band). For this, a multifrequency airborne SAR dataset acquired by the DLR's F-SAR sensor in West Greenland during the ARCTIC 2015 campaign is used. The achieved results indicate that L-band polarimetric measurements allow to differentiate the different glacier zones based on the subsurface (e.g., volume) scattering characteristics. In contrast, the increased (back-) scattering complexity and the reduced penetration capability limit the potential of X- and C-band polarimetric measurements.
format	article
author	Giuseppe Parrella Irena Hajnsek Konstantinos P. Papathanassiou
author_facet	Giuseppe Parrella Irena Hajnsek Konstantinos P. Papathanassiou
author_sort	Giuseppe Parrella
title	Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
title_short	Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
title_full	Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
title_fullStr	Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
title_full_unstemmed	Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
title_sort	model-based interpretation of polsar data for the characterization of glacier zones in greenland
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/f1b1892f86334a29a9f02165c4de81d8
work_keys_str_mv	AT giuseppeparrella modelbasedinterpretationofpolsardataforthecharacterizationofglacierzonesingreenland AT irenahajnsek modelbasedinterpretationofpolsardataforthecharacterizationofglacierzonesingreenland AT konstantinosppapathanassiou modelbasedinterpretationofpolsardataforthecharacterizationofglacierzonesingreenland
_version_	1718414730275586048

Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland

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