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Tracking and Orbit Determination Performance of the GRAS Instrument on MetOp-A

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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Abstract

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.

Document Type:Article
Title:Tracking and Orbit Determination Performance of the GRAS Instrument on MetOp-A
Authors:
AuthorsInstitution or Email of Authors
Montenbruck, OliverUNSPECIFIED
Andres, YagoEumetsat
Bock, HeikeAIUB
van Helleputte, TomTU Delft
van den IJssel, JoseTU Delft
Loiselet, MarcESA
Marquardt, ChristianEumetsat
Silvestrin, PierluigiESA
Visser, PeterTU Delft
Yoon, YokeUNSPECIFIED
Date:7 September 2007
Journal or Publication Title:GPS Solutions
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:12
DOI:10.1007/s10291-008-0091-2
Page Range:pp. 289-299
Publisher:Springer Verlag
Status:Published
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)
Location: Oberpfaffenhofen
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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