Parrella, Giuseppe und Hajnsek, Irena und Papathanassiou, Konstantinos (2016) On the interpretation of polarimetric phase differences in SAR data over land ice. IEEE Geoscience and Remote Sensing Letters, 13 (2), Seiten 192-196. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/LGRS.2015.2505172. ISSN 1545-598X.
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Kurzfassung
Spaceborne synthetic aperture radars (SARs) represent a powerful tool to perform cryospheric observations due to their high spatial resolution and capability to acquire data during the winter time. Especially at lower frequencies, SAR signals penetrate beneath the glaciers surface through the shallow snow cover, interacting with surface as well as sub-surface features. This makes the scattering scenario very complex and the interpretation of SAR backscattering from glaciers and ice sheets not straightforward. In the case of polarimetric SARs (PolSAR), the understanding of polarization phase differences represents one of the main open issues. In this paper, a physical model is employed to relate co-polarization HH-VV phase difference (CPD) to structural and dielectric properties of snow and firn which characterize the uppermost layers of glaciers. Modelled CPD values are compared to values observed in airborne L-band (1.3 GHz) SAR data, acquired over the Austfonna ice-cap, in Svalbard, in spring 2007. The inversion of the employed model shows promising results toward the retrieval of firn properties. In particular, the obtained thickness estimates are found to be in good agreement with GPR profiles measured in coordination with the SAR acquisitions.
elib-URL des Eintrags: | https://elib.dlr.de/98147/ | ||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
Titel: | On the interpretation of polarimetric phase differences in SAR data over land ice | ||||||||||||||||
Autoren: |
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Datum: | Februar 2016 | ||||||||||||||||
Erschienen in: | IEEE Geoscience and Remote Sensing Letters | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||
Band: | 13 | ||||||||||||||||
DOI: | 10.1109/LGRS.2015.2505172 | ||||||||||||||||
Seitenbereich: | Seiten 192-196 | ||||||||||||||||
Herausgeber: |
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Verlag: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||
ISSN: | 1545-598X | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Polarimetric SAR, polarimetric phase difference, differential propagation, firn anisotropy | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Vorhaben Multi-dimensionale SAR-Auswertung (alt) | ||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte | ||||||||||||||||
Hinterlegt von: | Parrella, Dr. sc. Giuseppe | ||||||||||||||||
Hinterlegt am: | 09 Sep 2015 13:41 | ||||||||||||||||
Letzte Änderung: | 28 Nov 2023 08:46 |
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