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Characterisation of oriented volumes in glacier ice and extinction inversion with Pol-InSAR

Sharma, Jayanti and Hajnsek, Irena and Papathanassiou, Konstantinos (2009) Characterisation of oriented volumes in glacier ice and extinction inversion with Pol-InSAR. In: Proceedings of the International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR), pp. 1-8. International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR), 2009-01-26 - 2009-01-30, Frascati, Italy.

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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 describes the estimation of ice extinctions through the modelling of Pol-InSAR coherences as a combination of a surface contribution from the snow-ice interface and a volume response from an oriented particle cloud. Separation of the ground and volume contributions is obtained using a novel decomposition of the polarimetric covariance matrix which allows for preferential particle orientations and accounts for the influence of the dielectric constants of ice and snow. Ground-to-volume scattering ratios derived from polarimetry are used in conjunction with Pol-InSAR interferometric coherences to invert the extinction of the ice layer. Validation is performed with airborne Pol-InSAR 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.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Characterisation of oriented volumes in glacier ice and extinction inversion with Pol-InSAR
Authors:
AuthorsInstitution or Email of Authors
Sharma, JayantiUNSPECIFIED
Hajnsek, IrenaUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIED
Date:January 2009
Journal or Publication Title:Proceedings of the International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-8
Editors:
EditorsEmail
ESA, UNSPECIFIED
Status:Published
Keywords:Pol-InSAR, Extinction, E-SAR, glaciers, Austfonna, Svalbard, polarimetry, target decomposition
Event Title:International Workshop on Applications of Polarimetry and Polarimetric Interferometry (Pol-InSAR)
Event Location:Frascati, Italy
Event Type:international Conference
Event Dates:2009-01-26 - 2009-01-30
Organizer:ESA (European Space Agency)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Prosmart, Smart-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Deposited By: Jayanti Sharma
Deposited On:23 Mar 2009
Last Modified:12 Dec 2013 20:36

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