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The current accuracy and long-term stability of the Global Terrestrial Reference Frames (TRFs) do not yet meet the 1 mm accuracy and 1 mm/decade long-term stability requirements defined by the Global Geodetic Observing System (GGOS). Towards achieving this goal this research project addresses new innovative strategies for combining all four space geodetic techniques: Global Navigation Satellite System (GNSS), Satellite Laser Ranging (SLR), Very Long Baseline Interferometry (VLBI), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS). This involves introducing a common target (CT) and a common clock (CC) at the Geodetic Observatory Wettzell (GOW) to serve as a common reference point and timeframe, respectively. In this study extensive simulations are performed for Global Positioning System (GPS), SLR and VLBI over 7 years as reference solutions. The corrections to a priori station coordinates are on mm-level, indicating a consistent solution. Additionally, first investigations on introducing a CC at GOW into the GPS processing are performed, revealing a slight decrease in coordinate standard deviations for stations connected to the CC. However, the correlations between the other station coordinates slightly increase while the correlations between the coordinates of the stations connected to the CC and the tropospheric parameters slightly decrease.

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First Results on Simulation Studies for Innovative Combination Strategies Utilizing Novel Clock Technologies

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  • 出版模式：

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  • 发表日期：

    2026年

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  • Anton Reinhold,
  • Susanne Glaser,
  • Karl Hans Neumayer,
  • Jacob Klug,
  • Manuela Seitz

摘要

The current accuracy and long-term stability of the Global Terrestrial Reference Frames (TRFs) do not yet meet the 1 mm accuracy and 1 mm/decade long-term stability requirements defined by the Global Geodetic Observing System (GGOS). Towards achieving this goal this research project addresses new innovative strategies for combining all four space geodetic techniques: Global Navigation Satellite System (GNSS), Satellite Laser Ranging (SLR), Very Long Baseline Interferometry (VLBI), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS). This involves introducing a common target (CT) and a common clock (CC) at the Geodetic Observatory Wettzell (GOW) to serve as a common reference point and timeframe, respectively. In this study extensive simulations are performed for Global Positioning System (GPS), SLR and VLBI over 7 years as reference solutions. The corrections to a priori station coordinates are on mm-level, indicating a consistent solution. Additionally, first investigations on introducing a CC at GOW into the GPS processing are performed, revealing a slight decrease in coordinate standard deviations for stations connected to the CC. However, the correlations between the other station coordinates slightly increase while the correlations between the coordinates of the stations connected to the CC and the tropospheric parameters slightly decrease.