\begin{table}%t2
%%\centering
\par
\caption{Atmospheric parameters adopted for the performance simulation of ALADDIN at Dome~C,
assuming that the instrument is located about 30~m above the ground level. The equivalent wind
speed is the wind speed integrated across the whole turbulence profile (above 30~m).
\label{tab:atmoparam}}
\begin{tabular}{cc}
\hline \hline\multicolumn{2}{c}{Atmospheric parameters}
\\ \hline Fried parameter $r_0$ at 500~nm & 38~cm
\\        Equivalent seeing & $0\farcs27$
\\        Coherence time $\tau_0$ & 7.9~ms 
\\        Equivalent wind speed & 15~m/s
\\        Outer scale $L_{\rm out}$ & 100~m
\\        Sky temperature & 230~K
\\        Ambient temperature at $h=30$~m & 230~K
\\        Mean {\it PWV} & 250~$\mu$m
\\        rms {\it PWV} & 1~$\mu$m
\\        Pressure & 640~mbar
\\ \hline
\end{tabular}
\end{table}