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Investigating The Potential To Estimate InSAR Penetration Depth Over Ice Sheets From Pol-InSAR Data

Fischer, Georg and Parrella, Giuseppe and Papathanassiou, Konstantinos and Hajnsek, Irena (2019) Investigating The Potential To Estimate InSAR Penetration Depth Over Ice Sheets From Pol-InSAR Data. In: International Geoscience and Remote Sensing Symposium (IGARSS). IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2019-07-28 - 2019-08-02, Yokohama, Japan. (Submitted)

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Abstract

Digital elevation models generated with SAR interferometry (InSAR) are an important information source for glacier and ice sheet mass balance. However, the measured elevations suffer from a penetration bias due to the interferometric phase center being up to several tens of meters below the surface. The penetration of the microwave signals depends on SAR parameters (e.g. frequency) and snow and ice conditions. There is potential to estimate this penetration bias directly from the data by means of polarimetric InSAR models. Existing models fail to describe the data across different test sites and ice conditions and phase centers were found to be deeper than predicted by these models. SAR tomography is employed to assess the vertical distribution of backscattering in the data from an airborne campaign. The data are compared to refined models in order to find better representations of the vertical backscattering distribution, while the model complexity is purposely kept simple to make a phase center estimation possible. Additionally, recent work showed the importance of strong subsurface layers which influence phase center depth. Combining the refined subsurface structure models and dominant subsurface layers allows simulating a variety of ice sheet subsurface scenarios and can be used to assess the potential to estimate the InSAR phase center depth directly from the data.

Item URL in elib:https://elib.dlr.de/126684/
Document Type:Conference or Workshop Item (Speech)
Title:Investigating The Potential To Estimate InSAR Penetration Depth Over Ice Sheets From Pol-InSAR Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fischer, GeorgUNSPECIFIEDhttps://orcid.org/0000-0002-7987-5453
Parrella, GiuseppeUNSPECIFIEDhttps://orcid.org/0000-0002-9174-7331
Papathanassiou, KonstantinosUNSPECIFIEDUNSPECIFIED
Hajnsek, IrenaUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Submitted
Keywords:Pol-InSAR, phase center, penetration bias, subsurface, glaciers
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Yokohama, Japan
Event Type:international Conference
Event Dates:2019-07-28 - 2019-08-02
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Multi-dimensionale SAR-Auswertung
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Fischer, Georg
Deposited On:04 Mar 2019 10:19
Last Modified:02 Aug 2019 03:00

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