@article{Pottiaux:3710,
      author        = "Pottiaux, Eric",
      title         = "{ROB's operational final GNSS-based tropospheric delay
                       models, grids, and maps}",
      year          = "2018",
      note          = "The database is continuously and operationally filled
                       since July 2011. Data retention use a floating windows
                       containing the last 4 years of data.",
}