@article{Pottiaux:3714,
      author        = "Pottiaux, Eric",
      title         = "{ROB's operational quasi real-time GNSS-based tropospheric
                       delay models, grids, and maps (from July 2011 until 31 Dec
                       2018)}",
      year          = "2018",
      note          = "The database is continuously and operationally filled.
                       Data retention use a floating windows containing the last 2
                       years of data.",
}