\begin{table}%t4
%\centering
\par
  \caption {\label{tab:data}Total amount of data from different survey models (see
    Table~\ref{tab:speed}). Except for model~7, the surveys are limited
    in Galactic longitude by $20^\circ<\rm{l}<90^\circ$.}
  \begin{tabular}{lrrrrrrr}
\hline
\hline
Parameter             & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 & Model 6 & Model 7 \\
\hline
Survey region         & $|{b}| < 5^\circ$   & $|{b}| < 10^\circ$ & $|{b}| < 5^\circ$ & $|{b}| < 10^\circ$   
                      & $|{b}| < 5^\circ$   & $|{b}| < 10^\circ$  & Visible sky \\
Pointing time (s)     & 600    & 600    & 600    & 600    & 1800 & 1800 & 120 \\
Total amount of data (peta-bytes) & 16.7 & 33.0 & 16.7 & 33.0 & 50.0 & 99.0 & 113 \\
\hline
  \end{tabular}
  \end{table}