\begin{table}%t1
    \caption{\label{tab:table}Input parameters to the trajectory code for runs of 
             Fig.~\ref{fig:weakstr}.} 
   %\centering
\par
    \begin{tabular}[h]{lcc}
      \hline\hline
      Parameter & Value      &  Units    \\
      \hline
      magnetic field, $B_0$  & 100 & Gauss  \\
      scale length, $L$      & 10 & km     \\
      particle type          & proton &    \\
      initial particle energy & 300 & eV   \\
      initial position $(x_0,y_0,z_0)$ & (0, 0.8, 0.6)  &   \\
      initial pitch angle  & 130 & deg     \\
      electric field, $E_0$:  &  &      \\
      \quad {\it weak electric field regime}  & 30 & V/m     \\
      \quad {\it strong electric field regime}  & 1.5 & kV/m     \\
      \hline 
      \end{tabular}
    \end{table}