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Multi-frequency PolInSAR signatures of a subpolar glacier

Sharma, Jayanti and Hajnsek, Irena and 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), p. 8. International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR), 2007-01-22 2007-01-26, Frascati, Italien.

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

Abstract

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.

Item URL in elib:https://elib.dlr.de/47426/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Multi-frequency PolInSAR signatures of a subpolar glacier
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sharma, JayantiUNSPECIFIEDUNSPECIFIED
Hajnsek, IrenaUNSPECIFIEDUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIEDUNSPECIFIED
Date:January 2007
Journal or Publication Title:Proceedings of the International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 8
Status:Published
Keywords:PolSAR, InSAR, PolInSAR, E-SAR, Land Ice, Austfonna, Svalbard
Event Title:International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Event Location:Frascati, Italien
Event Type:international Conference
Event Dates:2007-01-22 2007-01-26
Organizer:ESA (European Space Agency)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > SAR Technology
Deposited By: Sharma, Jayanti
Deposited On:28 Feb 2007
Last Modified:31 Jul 2019 19:19

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