\begin{table}%t6
%\centering
\par
\caption{Dry and wet tropospheric zenith path delays ($\tau_{\rm dtrp}$
  and $\tau_{\rm wtrp}$) at the EVN stations along with the adopted rms
  errors $\Delta\tau_{\rm dtrp}$ and $\Delta\tau_{\rm wtrp}$ in our {\it Monte
  Carlo} simulations.
\label{EVNdelay}}
\begin{tabular}{lcccccccc} \hline\hline
\noalign{\smallskip}
    Stations             &\multicolumn{2}{c}{Dry trop.}&&\multicolumn{5}{c}{Wet trop.}\\
&&&&\multicolumn{2}{c}{Mean}&&\multicolumn{2}{c}{Max}\\
\noalign {\vskip 0.0mm}
                         &$\tau_{\rm dtrp}$&$\Delta\tau_{\rm dtrp}$&&$\tau_{\rm wtrp}$&$\Delta\tau_{\rm wtrp}$&&$\tau_{\rm wtrp}$&$\Delta\tau_{\rm wtrp}$\\
                         &     (cm)       &   (cm)    &&    (cm)        &   (cm)    &&   (cm)       &  (cm)  \\\hline
    Effelsberg           &      220       &    0.5    &&       ~8       &     ~2.7   &&    20         &  ~6.7  \\     
    Hartebeesthoek       &      199       &    0.5    &&       10       &     ~3.3   &&    17         &  ~5.7  \\     
    Medicina             &      231       &    0.5    &&       11       &     ~3.7   &&    18         &  ~6.0  \\     
    Noto                 &      229       &    0.5    &&       12       &     ~4.0   &&    20         &  ~6.7  \\     
    Onsala               &      230       &    0.5    &&       ~8       &     ~2.7   &&    14         &  ~4.7  \\     
    Sheshan              &      231       &    0.5    &&       22       &     ~7.3   &&    36         &  12.0  \\     
    Urumqi               &      210       &    0.5    &&       10       &     ~3.3   &&    10         &  ~3.3  \\     
    Westerbork           &      220       &    0.5    &&       ~8       &     ~2.7   &&    20         &  ~6.7  \\      
    Wettzell             &      215       &    0.5    &&       ~7       &     ~2.3   &&    13         &  ~4.3  \\    
    Yebes                &      208       &    0.5    &&       ~5       &     ~2.0   &&    ~5         &  ~2.0  \\     \hline
\end{tabular}
\end{table}