\begin{table}%t1
\caption{Several derived parameters from the cloud model for the lower-half section of the {
 surge in Figs.~\ref{fig2} (AOI~A) and~\ref{fig3}} at $t=39.7$~min.}\label{tabla}
%\centering
\small
 \begin{tabular}{cccc}
 \hline
 \hline
Parameter & Av. value & Parameter & Av. value \\
$v$ [km~s$^{-1}$] &     11.7 & $\Delta\lambda_{\rm D}$ [\AA]  &   0.34\\
$S/I_{\rm c}$ &     0.154 & $\tau$    &  1.05 \\
\hline
&&& \\[-8pt]
$N_{2}$ [cm$^{-3}$]  &    $4.5 \times 10^{4}$ & $N_{\rm e}$ [cm$^{-3}$]  & $6.8\times 10^{10}$  \\
$N_{\rm H}$ [cm$^{-3}$]  & $1.1 \times 10^{11}$ & $N_{1}$ [cm$^{-3}$] & $3.8\times 10^{10}$ \\
$N_{3}$ [cm$^{-3}$]  &    $4.2 \times 10^{2}$ & $T_{\rm e}$  [K]&    $1.51\times 10^{4}$ \\
$p$ [dyn cm$^{-2}$] & $0.38$ & $M$ [g cm$^{-2}$] & $1.39\times 10^{-4}$ \\
$\rho$ [g cm$^{-3}$] & $2.3\times10^{-13}$ & $x_{\rm H}$ &    0.64 \\
$c_{\rm s}$ [km~s$^{-1}$]  &  14.4 & & \\
 \hline
 \end{tabular}
\end{table}