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First In-Orbit Experience of TerraSAR-X Flight Dynamics OperationsTerraSAR-X is an advanced synthetic aperture radar satellite system for scientific and commercial applications that is realized in a public-private partnership between the German Aerospace Center (DLR) and the Astrium GmbH. TerraSAR-X was launched at June 15, 2007 on top of a Russian DNEPR-1 rocket into a 514 km sun-synchronous dusk-dawn orbit with an 11-day repeat cycle and will be operated for a period of at least 5 years during which it will provide high resolution SAR-data in the X-band. Due to the objectives of the interferometric campaigns the satellite has to comply to tight orbit control requirements, which are formulated in the form of a 250 m toroidal tube around a pre-flight determined reference trajectory (see [1] for details). The acquisition of the reference orbit was one of the main and key activities during the Launch and Early Orbit Phase (LEOP) and had to compensate for both injection errors and spacecraft safe mode attitude control thruster activities. The paper summarizes the activities of GSOC flight dynamics team during both LEOP and early Commissioning Phase, where the main tasks have been 1) the first-acquisition support via angle-tracking and GPS-based orbit determination, 2) maneuver planning for target orbit acquisition and maintenance, and 3) precise orbit and attitude determination for SAR processing support. Furthermore, a presentation on the achieved results and encountered problems will be addressed.
Document ID
20080012729
Document Type
Conference Paper
Authors
Kahle, R. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
Kazeminejad, B. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
Kirschner, M. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
Yoon, Y. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
Kiehling, R. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
D'Amico, S. (Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Wessling, Germany)
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
Copyright
Public Use Permitted.

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IDRelationTitle20080012629Analytic PrimaryProceedings of the 20th International Symposium on Space Flight Dynamics