Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape
Rising temperatures in the Arctic are leading to recent changes in permafrost regions. The monitoring of permafrost state and dynamics benefits from the large-scale capabilities of airborne and spaceborne remote sensing as well as the opportunity to image regions that are difficult to access. In thi...
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ftdlr:oai:elib.dlr.de:194470 2024-05-19T07:36:03+00:00 Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape Saporta, Paloma Alonso-Gonzalez, Alberto Hajnsek, Irena 2023-02 application/pdf https://elib.dlr.de/194470/ https://elib.dlr.de/194470/1/Abstract_PolInSAR23_saporta.pdf en eng https://elib.dlr.de/194470/1/Abstract_PolInSAR23_saporta.pdf Saporta, Paloma und Alonso-Gonzalez, Alberto und Hajnsek, Irena (2023) Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape. In: POLinSAR Online Abstracts. ESA POLinSAR Workshop, 2023-06-19 - 2023-06-23, Toulouse, France. Radarkonzepte Konferenzbeitrag PeerReviewed 2023 ftdlr 2024-04-25T01:05:25Z Rising temperatures in the Arctic are leading to recent changes in permafrost regions. The monitoring of permafrost state and dynamics benefits from the large-scale capabilities of airborne and spaceborne remote sensing as well as the opportunity to image regions that are difficult to access. In this regard, the German Aerospace Center (DLR) conducted an experimental airborne SAR campaign aiming at characterizing SAR responses over permafrost landscapes and assessing to which extent parameters of interest, such as soil moisture and soil layer properties, can be estimated in such regions [1]. The campaign comprises two data sets acquired in the Canadian Arctic in August 2018, when the upper layer of the soil is thawed, and in March 2019, when the ground is entirely frozen. Smaller (X- and C-band) and larger (L-band) wavelengths were used. This study focuses on a particular test site encompassing the Trail Valley Creek catchment (Northwest Territories), which is a well-studied area of continuous permafrost covered by tundra vegetation [2]. Previous polarimetric analysis shows an overall decrease in backscattering power of several dB from summer to winter and a relative increase of the surface contribution (entropy/alpha analysis) [3]. Simultaneously, landscape features remain clearly recognizable at all wavelengths in winter. As permafrost parameters (vegetation, soil moisture, soil type, winter snow depth) are suspected to be related with another [2], unambiguous interpretation of the signal is challenging. Adding another dimension (interferometry) related to phase center height and therefore signal penetration depth is a step towards better interpretation of the signal. As several baselines were flown over Trail Valley Creek test site and fully polarimetric data was acquired, polarimetric SAR interferometry observables can be retrieved. A particular parameter of interest is the coherence region, namely the set of coherences that can be obtained from all possible pairs of polarimetric acquisitions at a given ... Conference Object Arctic Northwest Territories permafrost Tundra German Aerospace Center: elib - DLR electronic library |
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German Aerospace Center: elib - DLR electronic library |
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English |
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Radarkonzepte Saporta, Paloma Alonso-Gonzalez, Alberto Hajnsek, Irena Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
topic_facet |
Radarkonzepte |
description |
Rising temperatures in the Arctic are leading to recent changes in permafrost regions. The monitoring of permafrost state and dynamics benefits from the large-scale capabilities of airborne and spaceborne remote sensing as well as the opportunity to image regions that are difficult to access. In this regard, the German Aerospace Center (DLR) conducted an experimental airborne SAR campaign aiming at characterizing SAR responses over permafrost landscapes and assessing to which extent parameters of interest, such as soil moisture and soil layer properties, can be estimated in such regions [1]. The campaign comprises two data sets acquired in the Canadian Arctic in August 2018, when the upper layer of the soil is thawed, and in March 2019, when the ground is entirely frozen. Smaller (X- and C-band) and larger (L-band) wavelengths were used. This study focuses on a particular test site encompassing the Trail Valley Creek catchment (Northwest Territories), which is a well-studied area of continuous permafrost covered by tundra vegetation [2]. Previous polarimetric analysis shows an overall decrease in backscattering power of several dB from summer to winter and a relative increase of the surface contribution (entropy/alpha analysis) [3]. Simultaneously, landscape features remain clearly recognizable at all wavelengths in winter. As permafrost parameters (vegetation, soil moisture, soil type, winter snow depth) are suspected to be related with another [2], unambiguous interpretation of the signal is challenging. Adding another dimension (interferometry) related to phase center height and therefore signal penetration depth is a step towards better interpretation of the signal. As several baselines were flown over Trail Valley Creek test site and fully polarimetric data was acquired, polarimetric SAR interferometry observables can be retrieved. A particular parameter of interest is the coherence region, namely the set of coherences that can be obtained from all possible pairs of polarimetric acquisitions at a given ... |
format |
Conference Object |
author |
Saporta, Paloma Alonso-Gonzalez, Alberto Hajnsek, Irena |
author_facet |
Saporta, Paloma Alonso-Gonzalez, Alberto Hajnsek, Irena |
author_sort |
Saporta, Paloma |
title |
Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
title_short |
Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
title_full |
Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
title_fullStr |
Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
title_full_unstemmed |
Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape |
title_sort |
assessing polarimetric sar interferometry coherence region parameters over a permafrost landscape |
publishDate |
2023 |
url |
https://elib.dlr.de/194470/ https://elib.dlr.de/194470/1/Abstract_PolInSAR23_saporta.pdf |
genre |
Arctic Northwest Territories permafrost Tundra |
genre_facet |
Arctic Northwest Territories permafrost Tundra |
op_relation |
https://elib.dlr.de/194470/1/Abstract_PolInSAR23_saporta.pdf Saporta, Paloma und Alonso-Gonzalez, Alberto und Hajnsek, Irena (2023) Assessing Polarimetric SAR Interferometry coherence region parameters over a permafrost landscape. In: POLinSAR Online Abstracts. ESA POLinSAR Workshop, 2023-06-19 - 2023-06-23, Toulouse, France. |
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1799475082403250176 |