\begin{table}%tA.1
%\centering
\par
\caption{Basic parameters used for the {\it SNR} estimation.\label{tab:parcase}}
\begin{tabular}{cccccccccc}\hline\hline
      & $\lambda_{\rm im}~\rm (\mu m)$ & $\lambda_{\rm wfs}~\rm (\mu m)$&
 $\Delta\lambda~\rm (\mu m)$& $Q_{\rm e}$ & $r_{0,\rm wfs}~$(m) & $r_{0,\rm im}~$(m)
       &$RON$& $m_{\rm bg}$&$\tau~$(msec) \\\hline 
Case 1 & 2.20 & 2.20& 0.4&0.4&0.89&0.89&18.0&13.0&5.0 \\ 
Case 2 & 0.64& 0.64&0.4&0.4&0.20&0.20&3.0&20.5&5.0\\ 
Case 3 & 2.20& 0.64&0.4&0.4&0.20&0.89&3.0&20.5&5.0\\\hline
\end{tabular}
\end{table}