DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Multi-frequency PolInSAR signatures of a subpolar glacier

Sharma, Jayanti und Hajnsek, Irena und Papathanassiou, Konstantinos (2007) Multi-frequency PolInSAR signatures of a subpolar glacier. In: Proceedings of the International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR), Seite 8. International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR), 2007-01-22 2007-01-26, Frascati, Italien.

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Offizielle URL: http://uranus.esrin.esa.it/cgi-bin/confpol7.pl?vf=76/paper_jsharma_polinsar2007_final.pdf


In recent years there has been increased interest in using SAR to study and monitor glaciers and ice sheets for glaciological and climate change research. This paper relates the complex interferometric coherence of land ice to an extinction coefficient and ground-to-volume scattering ratio, and validates this model with airborne PolInSAR data at L- and P-band collected using DLR's E-SAR system over the Austfonna ice cap in Svalbard, Norway. Observed coherences are compared with several PolInSAR scattering models including random volume (RV), random volume under ground (RVuG), oriented volume (OV) and oriented volume under ground (OVuG). In all cases the ice volume is approximated as an infinitely thick and uniformly lossy medium. Model predictions of interferometric coherence using estimated surface-to-volume scattering ratios and extinctions are validated against observed coherences referenced to corner reflectors deployed on the ice's surface. Measured and modelled phase centres were found to be in agreement within a few metres. The distribution of complex coherences on the unit circle suggests a possible oriented volume under ground (OVuG) scattering scenario for a significant portion of L-band PolInSAR observations in the ablation zone, although a limited observation space does not allow us to reach any firm conclusions regarding model suitability at P-band.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Multi-frequency PolInSAR signatures of a subpolar glacier
AutorenInstitution oder E-Mail-Adresse der Autoren
Papathanassiou, KonstantinosNICHT SPEZIFIZIERT
Datum:Januar 2007
Erschienen in:Proceedings of the International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Referierte Publikation:Nein
In ISI Web of Science:Nein
Seitenbereich:Seite 8
Stichwörter:PolSAR, InSAR, PolInSAR, E-SAR, Land Ice, Austfonna, Svalbard
Veranstaltungstitel:International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Veranstaltungsort:Frascati, Italien
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-01-22 2007-01-26
Veranstalter :ESA (European Space Agency)
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W - keine Zuordnung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):W -- keine Zuordnung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme
Institut für Hochfrequenztechnik und Radarsysteme > SAR-Technologie
Hinterlegt von: Jayanti Sharma
Hinterlegt am:28 Feb 2007
Letzte Änderung:12 Dez 2013 20:23

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Hilfe & Kontakt
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.