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GPS-Based Precision Baseline Reconstruction for the TanDEM-X SAR-FormationThe TanDEM-X formation employs two separate spacecraft to collect interferometric Synthetic Aperture Radar (SAR) measurements over baselines of about 1 km. These will allow the generation ofa global Digital Elevation Model (DEM) with an relative vertical accuracy of 2-4 m and a 10 m ground resolution. As part of the ground processing, the separation of the SAR antennas at the time of each data take must be reconstructed with a 1 mm accuracy using measurements from two geodetic grade GPS receivers. The paper discusses the TanDEM-X mission as well as the methods employed for determining the interferometric baseline with utmost precision. Measurements collected during the close fly-by of the two GRACE satellites serve as a reference case to illustrate the processing concept, expected accuracy and quality control strategies.
Document ID
Document Type
Conference Paper
Montenbruck, O.
(Deutsches Zentrum fuer Luft- und Raumfahrt e.V. Wessling, Germany)
vanBarneveld, P. W. L.
(Technische Hogeschool Delft, Netherlands)
Yoon, Y.
(Deutsches Zentrum fuer Luft- und Raumfahrt e.V. Wessling, Germany)
Visser, P. N. A. M.
(Technische Hogeschool Delft, Netherlands)
Date Acquired
August 24, 2013
Publication Date
September 24, 2007
Publication Information
Publication: Proceedings of the 20th International Symposium on Space Flight Dynamics
Subject Category
Spacecraft Design, Testing And Performance
Distribution Limits
Public Use Permitted.
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