A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap
Polarimetric SAR observations at long-wavelengths (e.g. L- and P- band) provide the possibility to characterize the near-surface structure of glaciers and ice sheets. The knowledge of such information is crucial for understanding and monitoring the dynamic of ice masses [1]. With dry snow conditions...
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ftdlr:oai:elib.dlr.de:93602 2024-05-19T07:37:52+00:00 A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap Parrella, Giuseppe Hajnsek, Irena Papathanassiou, Konstantinos Lacoste-Francis, H. 2015-01 https://elib.dlr.de/93602/ unknown ESA Communications Parrella, Giuseppe und Hajnsek, Irena und Papathanassiou, Konstantinos (2015) A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap. In: Proceedings of ESA POLinSAR Workshop. ESA Communications. Polarimetric and Interferometric SAR Workshop (PI-SAR), 2015-01-26 - 2015-01-30, Frascati, Italy. Radarkonzepte Konferenzbeitrag NonPeerReviewed 2015 ftdlr 2024-04-25T00:31:44Z Polarimetric SAR observations at long-wavelengths (e.g. L- and P- band) provide the possibility to characterize the near-surface structure of glaciers and ice sheets. The knowledge of such information is crucial for understanding and monitoring the dynamic of ice masses [1]. With dry snow conditions, SAR signal penetrates several meters through snow and ice, interacting with buried features, like ice lenses, air bubbles, etc. The structure of subsurface layers determines the penetration depth of the SAR waves. In a polarimetric SAR (PolSAR) sensor, the penetration capability of microwaves is combined to the additional information brought by the polarization diversity, which provides high sensitivity to scatterers properties [2]. This paper addresses the interpretation of L- and P- band PolSAR measurements over the Austfonna ice-cap, Svalbard, by using the polarimetric scattering model presented in [3]. In detail, two test sites are investigated, which are located in different glacier zones [4] of the ice-cap. Experimental SAR data were collected by the airborne E-SAR sensor of the German Aerospace Center at L- (1.3 GHz) and P-band (0.35 GHz) over the percolation zone and the superimposed ice region of Austfonna, in spring 2007 during the ICESAR campaign. First, a qualitative polarimetric data analysis is performed based on a set of descriptors which includes backscattering coefficients, co-polarization ratio, co-polarization phase difference, entropy and mean alpha angle. Differences appearing between the two sites at both frequencies are discussed and related to the differences in subsurface structure with the support of ground measurements. A polarimetric decomposition, based on the scattering models proposed in [3], is also applied to the SAR data to provide a quantitative estimation of physical parameters at both locations. A final discussion addresses the incongruences observed by comparing the results obtained at L- and P-band over each site. The difference in wavelength turns out to generate significant ... Conference Object Austfonna glacier Ice cap Polar Ice Cap Svalbard German Aerospace Center: elib - DLR electronic library |
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German Aerospace Center: elib - DLR electronic library |
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Radarkonzepte Parrella, Giuseppe Hajnsek, Irena Papathanassiou, Konstantinos A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
topic_facet |
Radarkonzepte |
description |
Polarimetric SAR observations at long-wavelengths (e.g. L- and P- band) provide the possibility to characterize the near-surface structure of glaciers and ice sheets. The knowledge of such information is crucial for understanding and monitoring the dynamic of ice masses [1]. With dry snow conditions, SAR signal penetrates several meters through snow and ice, interacting with buried features, like ice lenses, air bubbles, etc. The structure of subsurface layers determines the penetration depth of the SAR waves. In a polarimetric SAR (PolSAR) sensor, the penetration capability of microwaves is combined to the additional information brought by the polarization diversity, which provides high sensitivity to scatterers properties [2]. This paper addresses the interpretation of L- and P- band PolSAR measurements over the Austfonna ice-cap, Svalbard, by using the polarimetric scattering model presented in [3]. In detail, two test sites are investigated, which are located in different glacier zones [4] of the ice-cap. Experimental SAR data were collected by the airborne E-SAR sensor of the German Aerospace Center at L- (1.3 GHz) and P-band (0.35 GHz) over the percolation zone and the superimposed ice region of Austfonna, in spring 2007 during the ICESAR campaign. First, a qualitative polarimetric data analysis is performed based on a set of descriptors which includes backscattering coefficients, co-polarization ratio, co-polarization phase difference, entropy and mean alpha angle. Differences appearing between the two sites at both frequencies are discussed and related to the differences in subsurface structure with the support of ground measurements. A polarimetric decomposition, based on the scattering models proposed in [3], is also applied to the SAR data to provide a quantitative estimation of physical parameters at both locations. A final discussion addresses the incongruences observed by comparing the results obtained at L- and P-band over each site. The difference in wavelength turns out to generate significant ... |
author2 |
Lacoste-Francis, H. |
format |
Conference Object |
author |
Parrella, Giuseppe Hajnsek, Irena Papathanassiou, Konstantinos |
author_facet |
Parrella, Giuseppe Hajnsek, Irena Papathanassiou, Konstantinos |
author_sort |
Parrella, Giuseppe |
title |
A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
title_short |
A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
title_full |
A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
title_fullStr |
A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
title_full_unstemmed |
A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap |
title_sort |
comparison of l- and p-band polsar observations of a sub-polar ice-cap |
publisher |
ESA Communications |
publishDate |
2015 |
url |
https://elib.dlr.de/93602/ |
genre |
Austfonna glacier Ice cap Polar Ice Cap Svalbard |
genre_facet |
Austfonna glacier Ice cap Polar Ice Cap Svalbard |
op_relation |
Parrella, Giuseppe und Hajnsek, Irena und Papathanassiou, Konstantinos (2015) A comparison of L- and P-band PolSAR observations of a sub-polar ice-cap. In: Proceedings of ESA POLinSAR Workshop. ESA Communications. Polarimetric and Interferometric SAR Workshop (PI-SAR), 2015-01-26 - 2015-01-30, Frascati, Italy. |
_version_ |
1799477255896825856 |