@article{Bennitt:3194,
      author        = "Bennitt, G. V. and Johnson, H.R.  and Weston, P. P.  and
                       Jones, J.  and Pottiaux, E.",
      title         = "{An assessment of ground-based GNSS Zenith Total Delay
                       observation errors and their correlations using the Met
                       Office UKV model}",
      year          = "2017",
}