\begin{table}%t2 \caption{\label{tab:receivers}Receiver characteristics.} %\centerline { \begin{tabular}{ccccccc} \hline\hline $\nu$ &$\Delta\nu$ &$T_{\rm sys}$ &$\Gamma$ &$\theta$ &$X$ &Pol. \\ (GHz) &(MHz) &(K) &(K/Jy) &(\arcsec) &(\arcsec) & \\ \hline 4.85 &500 &27 &1.5 &146 &485 &LCP, RCP \\ 10.45 &300 &50 &1.3 &67 &182.4 &LCP, RCP \\ \hline \end{tabular}} \par \medskip Column~1, is the central frequency while Col.~2 is the receiver bandwidth. Column~3, gives the system temperature and Col.~4 the sensitivity. Column~5, shows the full width at half maximum and Col.~6 the angular separation between the two beams. Finally, in Col.~7 we give the polarization channels available. \end{table}