\begin{table}%t1
\caption{\label{ar_table}Summary of data analysis.}
%\centering
\par
\begin{tabular}{c c c c}
  \hline\hline\noalign{\smallskip}
   & AR108 & AR0330 & AR673\\ 
   \hline
   Start date & 10-Sep-2002 22:45 & 08-Apr-2003 22:45 & 21-Sep-2004 22:45\\
   End date & 11-Sep-2002 06:29 & 09-Apr-2003 06:29 & 22-Sep-2004 06:44 \\ 
   Start location & $(-570$, $-212$)$''$ & ($-170$, 215)$''$ & (115, $-340$)$''$ \\ 
   Field of view size & 70$'' \times 70''$ & 80$'' \times  80''$ & $70'' \times  70''$\\
   Cadence & 10 s & 10 s & 10 s\\ 
   \hline
\end{tabular}\vspace*{2mm}
\end{table}