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Estimation of phase center corrections for GLONASS-M satellite antennas

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Abstract

Driven by the comprehensive modernization of the GLONASS space segment and the increased global availability of GLONASS-capable ground stations, an updated set of satellite-specific antenna phase center corrections for the current GLONASS-M constellation is determined by processing 84 weeks of dual-frequency data collected between January 2008 and August 2009 by a worldwide network of 227 GPS-only and 115 combined GPS/GLONASS tracking stations. The analysis is performed according to a rigorous combined multi-system processing scheme providing full consistency between the GPS and the GLONASS system. The solution is aligned to a realization of the International Terrestrial Reference Frame 2005. The estimated antenna parameters are compared with the model values currently used within the International GNSS Service (IGS). It is shown that the z-offset estimates are on average 7 cm smaller than the corresponding IGS model values and that the block-specific mean value perfectly agrees with the nominal GLONASS-M z-offset provided by the satellite manufacturer. The existence of azimuth-dependent phase center variations is investigated and uncertainties in the horizontal offset estimates due to mathematical correlations and yaw-attitude modeling problems during eclipse seasons are addressed. Finally, it is demonstrated that the orbit quality benefits from the updated GLONASS-M antenna phase center model and that a consistent set of satellite antenna z-offsets for GPS and GLONASS is imperative to obtain consistent GPS- and GLONASS-derived station heights.

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Authors and Affiliations

  1. European Space Operations Centre (ESOC), Robert-Bosch-Strasse 5, 64293, Darmstadt, Germany

    Florian Dilssner, Tim Springer, Claudia Flohrer & John Dow

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  1. Florian Dilssner
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  2. Tim Springer
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  3. Claudia Flohrer
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  4. John Dow
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Correspondence to Florian Dilssner.

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Dilssner, F., Springer, T., Flohrer, C. et al. Estimation of phase center corrections for GLONASS-M satellite antennas. J Geod 84, 467–480 (2010). https://doi.org/10.1007/s00190-010-0381-7

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