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Modeling Multifrequency Pol-InSAR Data From the Percolation Zone of the Greenland Ice Sheet

Fischer, Georg and Papathanassiou, Konstantinos and Hajnsek, Irena (2019) Modeling Multifrequency Pol-InSAR Data From the Percolation Zone of the Greenland Ice Sheet. IEEE Transactions on Geoscience and Remote Sensing, 57 (4), pp. 1963-1976. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2018.2870301. ISSN 0196-2892.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://ieeexplore.ieee.org/document/8490682


The analysis of data from an airborne synthetic aperture radar (SAR) campaign in the percolation zone of Greenland revealed an interferometric coherence undulation behavior with respect to vertical wavenumber, which cannot be explained with existing models. We propose a model extension that accounts for scattering from distinct layers below the surface. Simulations show that the periodicity of the coherence undulation is mainly driven by the vertical distance between dominant subsurface layers, while the amplitude of the undulation is determined by the ratio between scattering from distinct layers and scattering from the firn volume. We use the model to interpret quad-pol SAR data at X-, C-, S-, L-, and P-bands. The inferred layer depths match layer detections in ground-based radar data and in situ measurements. We conclude that in the percolation zone, scattering from subsurface layers has to be taken into account to correctly interpret SAR data and demonstrate the potential to retrieve geophysical information about the vertical subsurface structure.

Item URL in elib:https://elib.dlr.de/118546/
Document Type:Article
Title:Modeling Multifrequency Pol-InSAR Data From the Percolation Zone of the Greenland Ice Sheet
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fischer, GeorgGeorg.Fischer (at) dlr.dehttps://orcid.org/0000-0002-7987-5453
Papathanassiou, Konstantinoskostas.papathanassiou (at) dlr.deUNSPECIFIED
Hajnsek, IrenaIrena.Hajnsek (at) dlr.deUNSPECIFIED
Date:April 2019
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/TGRS.2018.2870301
Page Range:pp. 1963-1976
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:glacier, ice sheet, polarimetric synthetic aperture radar interferometry (Pol-InSAR), stratigraphy, synthetic aperture radar (SAR), vertical structure
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Multi-dimensionale SAR-Auswertung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Fischer, Georg
Deposited On:17 Oct 2018 11:46
Last Modified:10 Dec 2019 09:59

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