@article{Pottiaux:3719,
      author        = "Pottiaux, Eric",
      title         = "{ROB's contribution to the COST Action ES1206 benchmark
                       campaign: Precise Slant tropospheric Path Delays (SPD),
                       Zenith tropospheric Path Delay (ZPD) and horizontal
                       gradients (GRD).}",
      year          = "2017",
}