\begin{table}%t1[ht]
\caption{CDS and SUMER files analysed in this study.\label{tab1}}
%\centering
\par
\begin{tabular}{ccc}
\hline\hline
Date & CDS files & SUMER files \\
\hline
%              &          &                \\ 
July 17, 1996 & s3843r00 &sum 960728$\_$155424\\
(FP1)         &s3844r00 &sum 960728$\_$162218 \\
              &         &sum 960728$\_$163608 \\
May 9, 1998   &s11068r00-01 &     \\
(F2)          &s11069r00-01 &     \\ 
June 20, 1998  &s11491r00    &     \\
(F3)          &s11491r01    &      \\
              &s11491r02    &      \\
\hline
\end{tabular}
\end{table}