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Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study

Dierking, Wolfgang and Lang, Oliver and Busche, Thomas (2017) Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study. The Cryosphere, 11 (4), pp. 1967-1985. Copernicus Publications. doi: 10.5194/tc-11-1967-2017. ISSN 1994-0416.

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Official URL: https://www.the-cryosphere.net/11/1967/2017/


Quantitative parameters characterizing the sea ice surface topography are needed in geophysical investigations such as studies on atmosphere–ice interactions or sea ice mechanics. Recently, the use of space-borne single-pass interferometric synthetic aperture radar (InSAR) for retrieving the ice surface topography has attracted notice among geophysicists. In this paper the potential of InSAR measurements is examined for several satellite configurations and radar frequencies, considering statistics of heights and widths of ice ridges as well as possible magnitudes of ice drift. It is shown that, theoretically, surface height variations can be retrieved with relative errors �< 0.5 m. In practice, however, the sea ice drift and open water leads may contribute significantly to the measured interferometric phase. Another essential factor is the dependence of the achievable interferometric baseline on the satellite orbit configurations. Possibilities to assess the influence of different factors on the measurement accuracy are demonstrated: signal-to-noise ratio, presence of a snow layer, and the penetration depth into the ice. Practical examples of sea surface height retrievals from bistatic SAR images collected during the TanDEM-X Science Phase are presented.

Item URL in elib:https://elib.dlr.de/117310/
Document Type:Article
Title:Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Dierking, WolfgangAWIUNSPECIFIED
Lang, OliverAIRBUS Defence & SpaceUNSPECIFIED
Busche, ThomasGerman Aerospace Center (DLR)UNSPECIFIED
Date:29 August 2017
Journal or Publication Title:The Cryosphere
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/tc-11-1967-2017
Page Range:pp. 1967-1985
Publisher:Copernicus Publications
Series Name:EGU Journals
Keywords:Seac ice, InSAR, sea ice topography
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 - Projekt TanDEM-X (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Busche, Thomas Edmund
Deposited On:13 Dec 2017 17:17
Last Modified:09 Jan 2019 12:23

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