Montenbruck, Oliver and Andres, Yago and Bock, Heike and van Helleputte, Tom and van den IJssel, Jose and Loiselet, Marc and Marquardt, Christian and Silvestrin, Pierluigi and Visser, Peter and Yoon, Yoke (2007) Tracking and Orbit Determination Performance of the GRAS Instrument on MetOp-A. GPS Solutions, 12 (4), pp. 289-299. Springer Verlag. DOI: 10.1007/s10291-008-0091-2.
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The Global Navigation Satellite System Receiver for Atmospheric Sounding (GRAS) on MetOp-A is the first European GPS receiver providing dual-frequency navigation and occultation measurements from a spaceborne platform on a routine basis. The receiver is based on ESA’s AGGA-2 correlator chip, which implements a high-quality tracking scheme for semi-codeless P(Y) code tracking on the L1 and L2 frequency. Data collected with the zenith antenna on MetOp-A has been used to perform an in-flight characterization of the GRAS instrument with focus on the tracking and navigation performance. Besides an assessment of the receiver noise and systematic measurement errors the study addresses the precise orbit determination accuracy achievable with the GRAS receiver. A consistency on the 5 cm level is demonstrated for reduced dynamics orbit solutions computed independently by four different agencies and software packages. 10 cm accuracy is obtained with purely kinematic solutions. As part of the analysis an empirical antenna offset correction and a preliminary phase center correction map are derived, which notably reduce the carrier phase residuals and improve the consistency of kinematic orbit determination results.
|Title:||Tracking and Orbit Determination Performance of the GRAS Instrument on MetOp-A|
|Date:||7 September 2007|
|Journal or Publication Title:||GPS Solutions|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 289-299|
|Keywords:||Precise orbit determination, phase center variation, tracking loops, semi-codeless tracking, AGGA-2, GRAS, MetOp|
|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 - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Space Operations and Astronaut Training|
|Deposited By:||Dr.rer.nat.hab. Oliver Montenbruck|
|Deposited On:||22 Jan 2009|
|Last Modified:||14 Jan 2010 23:12|
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