\begin{table}%t4
   \caption{The frequency and magnitude of the maxima of the PDS
   of the torques from the outer disk for the Neptune case are
   shown sorted by the  magnitude of the PDS at the maximum.}
   \label{table:pds_nep_outer}
   %\centering
\small
   \begin{tabular}{c c c}
      \hline\hline
      Code & Frequency & Amplitude \\ 
      \hline
&& \\[-8pt]
NIRVANA  & 0.389 &    $1.11\times10^{-7}$ \\
Flash polar&   0.204 &  $5.27\times10^{-8}$ \\
Flash Cart &   3.997 &   $5.411\times10^{-7}$ \\
      \hline
   \end{tabular}
\end{table}