IAG 150 Years pp 673-679 | Cite as

GFZ Global Multi-GNSS Network and Data Processing Results

  • Maik Uhlemann
  • Gerd Gendt
  • Markus Ramatschi
  • Zhiguo Deng
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 143)


The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences (GFZ) is operating a worldwide Global Navigation Satellite Systems (GNSS) station network since many years. With recent developments in receiver technology and new upcoming navigation satellite systems like Galileo an upgrade of our stations was needed to track all GNSS. We will present the current status and setup of our station network and the plan for future upgrades. All modernized stations are presently contributing to the Multi-GNSS EXperiment (MGEX) of the International GNSS Service (IGS) as well as to the COoperative Network of GNSS Observations (CONGO). Selected results from a combined GPS/Galileo data processing will be shown. The used data were taken mainly from the public available MGEX network whereas the focus of analysis lies on precise orbit and clock determination of Galileo In-Orbit-Validation (IOV) satellites. Quality assessments are given which are based on orbit overlap statistics, clock stabilities as well as comparisons with external solutions. Additionally an independent validation of the orbits is derived through Satellite Laser Ranging (SLR) measurements. Furthermore some initial results of BeiDou data processing are shown which were derived with an experimental set of MGEX data.


BeiDou Galileo-IOV MGEX Multi-GNSS POD 



The efforts of the IGS (Dow et al. 2009) in providing Multi-GNSS observation data are kindly acknowledged.


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Maik Uhlemann
    • 1
  • Gerd Gendt
    • 1
  • Markus Ramatschi
    • 1
  • Zhiguo Deng
    • 1
  1. 1.Section 1.1 GPS/Galileo Earth Observation, Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, TelegrafenbergPotsdamGermany

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