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GPS Based Relative Navigation for the TanDEM-X Mission – First Flight Results

Montenbruck, Oliver and Wermuth, Martin and Kahle, Ralph (2010) GPS Based Relative Navigation for the TanDEM-X Mission – First Flight Results. ION-GNSS-2010, 21-24. Sep. 2010, Portland, OR.

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Abstract

TanDEM-X is the first Synthetic Aperture Radar (SAR) mission using close formation flying for bistatic SAR interferometry. Within the next three years, TanDEM-X will enable a global mapping of the Earth to produce a high accuracy, high resolution digital elevation model (DEM) of the entire globe. As a prerequisite for the interferometric SAR processing, the relative position, or baseline, of the two spacecraft must be determined with millimeter accuracy. In support of this task, the two spacecraft are equipped with geodetic-grade GPS receivers. Independent baseline solutions will be generated by expert teams at both the German Space Operations Center (DLR/GSOC) and the German Research Centre for Geosciences (GFZ). These will be merged into a quality controlled combined product prior to use in the interferometric SAR processing. The paper provides an overview of the baseline determination process and discusses specific aspects such as phase pattern calibration, ambiguity resolution and a trade-off between single-and dual-frequency solutions. First flight results from the early commissioning phase are presented.

Document Type:Conference or Workshop Item (Paper)
Title:GPS Based Relative Navigation for the TanDEM-X Mission – First Flight Results
Authors:
AuthorsInstitution or Email of Authors
Montenbruck, Oliveroliver.montenbruck@dlr.de
Wermuth, Martinmartin.wermuth@dlr.de
Kahle, Ralphralph.kahle@dlr.de
Date:2010
Status:Published
Keywords:TanDEM-X; baseline determination; differential GPS; formation flying; IGOR
Event Title:ION-GNSS-2010
Event Location:Portland, OR
Event Type:international Conference
Event Dates:21-24. Sep. 2010
Organizer:ION
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Dr.rer.nat.hab. Oliver Montenbruck
Deposited On:09 Mar 2011 11:37
Last Modified:09 Mar 2011 11:40

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