\begin{table}%T3
%\centering
\par
\caption{Frequencies detected from two WET campaigns.\label{tab3}}
\begin{tabular}{rcccllr}
\hline\hline
 XCOV & Frequency & Period & $\left<{\rm Amplitude}\right>$ & 
                         \multicolumn{3}{c}{Identification} \\
      & ($\mu$Hz) &   (s)  &   (mma)   & $k$ & $\ell$ & $m$ \\
\hline
17~~~ & 1513.2    &  660.8 &    0.475  &     &        &     \\
\raisebox{-2pt}[0pt][0pt]{$\lceil$}
17~~~ & 1569.5    &  637.2 &    0.650  &     &        &     \\
\raisebox{2pt}[0pt][0pt]{$\lfloor$}
16~~~ & 1570.6    &  636.7 &    1.741  &  34 &   2    &$-$1 \\
\raisebox{-2pt}[0pt][0pt]{$\lceil$}
17~~~ & 1578.5    &  633.5 &    1.310  &  34 &   2    &$+$1 \\
\raisebox{2pt}[0pt][0pt]{$\lfloor$}
16~~~ & 1579.2    &  633.2 &    1.081  &     &        &     \\
16~~~ & 1629.9    &  613.5 &    1.131  &  18 &   1    &  0  \\
16~~~ & 1664.9    &  600.7 &    0.875  &  32 &   2    &  0  \\
16~~~ & 1718.2    &  582.0 &    1.032  &  31 &   2    &  0  \\
\raisebox{-2pt}[0pt][0pt]{$\lceil$}
17~~~ & 1767.1    &  565.9 &    0.458  &     &        &     \\
\raisebox{2pt}[0pt][0pt]{$\lfloor$}
16~~~ & 1768.5    &  565.5 &    1.174  &  30 &   2    &$-$1 \\
16~~~ & 1777.6    &  562.6 &    0.879  &  30 &   2    &$+$1 \\
\raisebox{-2pt}[0pt][0pt]{$\lceil$}
17~~~ & 1820.8    &  549.2 &    0.801  &     &        &     \\
\raisebox{2pt}[0pt][0pt]{$\lfloor$}
16~~~ & 1823.5    &  548.4 &    1.149  &  29 &   2    &  0  \\
17~~~ & 1882.9    &  531.1 &    1.156  &  28 &   2    &  0  \\
17~~~ & 1954.1    &  511.7 &    0.679  &  27 &   2    &  0  \\
\hline
\end{tabular}
\end{table}