\begin{table}%t1
%\centering
\par
\caption{Main parameters for the two virtual space missions dedicated to a full sky cartography with a pixel size of $0.1\times 0.1$~arcsec$^2$.}\label{compMISSION}
\begin{tabular}{lcc}
 \hline\hline
  & M~1 & M~2\\
 \hline
Scan rate $\omega$ ($''$/s )  & 60    & 30\\
Number of observations & 42 & 21 \\
Integration time per band (s) &12     & 24 \\
Telemetry per band (Mbits/s)& 228  & 112\\
Read-out-noise (e-) & 9.8  & 7.0 \\
\hline
\end{tabular}
\end{table}