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Polarimetric Decomposition Over Glacier Ice Using Long-wavelength Airborne PolSAR

Sharma, Jayanti und Hajnsek, Irena und Papathanassiou, Konstantinos und Moreira, Alberto (2011) Polarimetric Decomposition Over Glacier Ice Using Long-wavelength Airborne PolSAR. IEEE Transactions on Geoscience and Remote Sensing, 49 (1), Seiten 519-535. IEEE. DOI: 10.1109/TGRS.2010.2056692. ISSN 0196-2892.

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Offizielle URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5557789&tag=1

Kurzfassung

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. However, due to the medium's complexity, SAR backscattering from ice remains poorly understood, including the relative importance of scattering from surface and volume layers, and dependencies on frequency and glacier zone. Extreme weather conditions can result in quickly changing surface conditions influencing backscatter signatures, while leaving the underlying volume of interest unchanged. Surface and volume components must thus be separated in order to infer information regarding the properties of the ice volume. This paper describes a three-component scattering model to decompose polarimetric synthetic aperture radar (PolSAR) images of glacier ice. Total backscatter is modeled as the incoherent summation of surface, volume and sastrugi (wind-induced feature) components. The proposed model adapts and extends the Freeman and Durden decomposition for an ice volume scenario in which the volume is a dielectric medium. Forms of the model for both random and oriented volumes are considered and a new oriented sastrugi component is introduced which is able to explain backscatter behavior between different winter scenes. Validation is performed with airborne PolSAR data at L- and P-band collected using DLR's E-SAR system over the Austfonna ice cap in Svalbard, Norway as part of the ICESAR campaign.

Dokumentart:Zeitschriftenbeitrag
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Titel:Polarimetric Decomposition Over Glacier Ice Using Long-wavelength Airborne PolSAR
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Sharma, JayantiNICHT SPEZIFIZIERT
Hajnsek, IrenaNICHT SPEZIFIZIERT
Papathanassiou, KonstantinosNICHT SPEZIFIZIERT
Moreira, AlbertoNICHT SPEZIFIZIERT
Datum:Januar 2011
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:49
DOI :10.1109/TGRS.2010.2056692
Seitenbereich:Seiten 519-535
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
NICHT SPEZIFIZIERTIEEE
Verlag:IEEE
ISSN:0196-2892
Status:veröffentlicht
Stichwörter:polarimetric synthetic aperture radar (PolSAR), target decomposition, scattering mechanism, land ice
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Prosmart, Smart-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Jayanti Sharma
Hinterlegt am:19 Jul 2010 08:55
Letzte Änderung:12 Dez 2013 20:59

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