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Enhanced Solar Radiation Pressure Modeling for Galileo Satellites

Montenbruck, Oliver and Steigenberger, Peter and Hugentobler, Urs (2015) Enhanced Solar Radiation Pressure Modeling for Galileo Satellites. Journal of Geodesy, 89 (3), pp. 283-297. Springer. DOI: 10.1007/s00190-014-0774-0 ISSN 0949-7714

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This paper introduces a new approach for modeling solar radiation pressure (SRP) effects on Global Navigation Satellite Systems (GNSSs). It focuses on the Galileo In-Orbit Validation (IOV) satellites, for which obvious SRP modeling deficits can be identified in presently available precise orbit products. To overcome these problems, the estimation of empirical accelerations in the Sun-direction (D), solar panel axis (Y) and the orthogonal (B) axis is complemented by an a priori model accounting for the contribution of the rectangular spacecraft body. Other than the GPS satellites, which comprise an almost cubic body, the Galileo IOV satellites exhibit a notably rectangular shape with a ratio of about 2:1 for the main body axes. Use of the a priori box model allows to properly model the varying cross-section exposed to the Sun during yaw-steering attitude mode and helps to remove systematic once-per-revolution orbit errors that have so far affected the Galileo orbit determination. Parameters of a simple a priori cuboid model suitable for the IOV satellites are established from the analysis of a long-term set of GNSS observations collected with the global network of the Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS). The model is finally demonstrated to reduce the peak magnitude of radial orbit errors from presently 20 cm down to 5 cm outside eclipse phases.

Item URL in elib:https://elib.dlr.de/92106/
Document Type:Article
Title:Enhanced Solar Radiation Pressure Modeling for Galileo Satellites
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Journal or Publication Title:Journal of Geodesy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s00190-014-0774-0
Page Range:pp. 283-297
Keywords:Galileo, orbit determination, Solar Radiation Pressure, Box-Wing Model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:19 Nov 2014 09:38
Last Modified:11 Aug 2015 09:55

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