DORIS Tropospheric Estimation at IGN: Current Strategies, GPS Intercomparisons and Perspectives

Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 139)

Abstract

We reprocessed DORIS for all of 2010, using the latest model and strategy improvements to estimate Zenith Tropospheric Delays (ZTDs), as well as tropospheric horizontal gradients for about 60 ground stations. These results were compared to recent GPS-based estimates obtained at the Jet Propulsion Laboratory (JPL). After discussing some of the data processing options and current limitations of the DORIS data, we show that the DORIS-GPS comparisons possess a high degree of correlation (average being 0.97), and that total zenith delay estimates from the two techniques agree at the 3 mm level on average with 8.6 mm total RMS, with better results being obtained when a 5° elevation cutoff angle is used for DORIS. While these DORIS results cannot be used for real-time weather prediction, they could contribute to scientific investigations for climatology, thanks to the homogenous tracking network of the DORIS system, as well as the long-term history of the observation time series.

Keywords

DORIS GPS Horizontal tropospheric gradients Zenith tropospheric delay 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Pascal Willis
    • 1
    • 2
  • Olivier Bock
    • 3
  • Yoaz E. Bar-Sever
    • 4
  1. 1.Institut national de l’information Géographique et forestière (IGN), Direction TechniqueSaint-MandéFrance
  2. 2.Institut de Physique du Globe de Paris, PRES Sorbonne Paris CitéParisFrance
  3. 3.Institut national de l’information Géographique et forestière (IGN), LAREGMarne-la-ValléeFrance
  4. 4.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA

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