@article{Pottiaux:3698,
      author        = "Pottiaux, Eric",
      title         = "{ROB's Operational European Near Real-Time (NRT)
                       GNSS-based tropospheric delay estimates submitted to E-GVAP
                       (from 2007 until 31 Dec 2018)}",
      year          = "2018",
      note          = "The database is continuously and operationally filled.",
}