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Potential of Geodetic SAR for Positioning and Height Monitoring with TerraSAR-X and Sentinel-1

Gisinger, Christoph and Eineder, Michael and Gruber, Thomas and Balss, Ulrich (2016) Potential of Geodetic SAR for Positioning and Height Monitoring with TerraSAR-X and Sentinel-1. ESA Special Publication Proceedings. Living Planet Symposium 2016, 9.-13. Mai 2016, Prag, Tschechien. ISBN 978-92-9221-305-3 ISSN 1609-042X

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Official URL: http://www.spacebooks-online.com/product_info.php?cPath=104&products_id=17659&osCsid=0e4991fba1e168d3289dc7c618c49b0c

Abstract

Our research in exploiting the inherent ranging capabilities of Synthetic Aperture Radar (SAR) has demonstrated range observations at the one centimeter accuracy level for passive radar reflectors, given that the radar observations are processed by a geometrically accurate SAR processor. Moreover, external disturbances caused by atmospheric path delay (troposphere, ionosphere) and geodynamic displacements (solid earth tides, ocean loading, ...) have to be taken into account. The correction approach follows the concept used in well established geodetic techniques like Global Navigation Satellite System (GNSS) or radar altimetry. By making use of these geodetic SAR observations, direct 3D positioning of specifically designed passive objects (corner reflectors, octahedrons) or active transponders becomes attainable. For TerraSAR-X, the 3D positioning capability has been tested with different passive reflectors and enables an accuracy at the centimeter level. Regarding Sentinel-1, the ranging results reported for the geometrical calibration campaign show encouraging results of approximately 6 cm, and further refinements are currently under investigation. In addition, the feasibility of active transponders as radar targets was successfully demonstrated, making Sentinel-1 another candidate for geodetic SAR applications. The presentation discusses the 3D SAR method in the context of applications, which require an accurate monitoring of the ellipsoidal heights in order to link them to the global geometric reference frame. We give an overview on our SAR methods and state the potential for positioning and height monitoring with TerraSAR-X and Sentinel-1 on the base of selected study regions.

Item URL in elib:https://elib.dlr.de/103993/
Document Type:Conference or Workshop Item (Speech)
Title:Potential of Geodetic SAR for Positioning and Height Monitoring with TerraSAR-X and Sentinel-1
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gisinger, ChristophTUM-IAPGUNSPECIFIED
Eineder, MichaelMichael.Eineder (at) dlr.deUNSPECIFIED
Gruber, ThomasTU-IAPG MünchenUNSPECIFIED
Balss, UlrichUlrich.Balss (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:SP-740
Editors:
EditorsEmail
Ouwehand, Lenyesapub@gmail.com
Publisher:ESA Special Publication Proceedings
ISSN:1609-042X
ISBN:978-92-9221-305-3
Status:Published
Keywords:SAR absolute ranging, Height determination, radar reflectors, 3D positioning
Event Title:Living Planet Symposium 2016
Event Location:Prag, Tschechien
Event Type:international Conference
Event Dates:9.-13. Mai 2016
Organizer:ESA
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 hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Eineder, Prof. Dr. Michael
Deposited On:20 Apr 2016 13:47
Last Modified:06 Dec 2016 11:19

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