\begin{table}%T3
\caption{Telescope and receiver tuning characteristics.} \label{tabtel}
%\centerline
{
\begin{tabular}{lcccc}
\hline\hline
Receiver & Frequency & $\theta_B$~$^1$ & $\eta_{mB}$~$^2$ & $G_i$~$^3$ \\
         &   [GHz]   & [\arcsec]       &               &         \\
\hline
495~A2	 &  487.3    & 146 & $0.92\pm0.02$   & $\approx$0.03 \\
549~A1   &  557      & 127 & $0.84\pm0.03$   & 0.04          \\
	 & 555--556  & 128 & $0.84\pm0.03$   & 0.06          \\
	 &  558.3    & 127 & $0.83\pm0.03^4$ & 0.06          \\
	 &  547.7    & 130 & $0.85\pm0.03$   & $<$0.03       \\
555~B2   &   557     & 127 & $0.87\pm0.03$   & $<$0.02       \\
         & 555--556  & 128 & $0.87\pm0.03$   & 0.08    \\
         & 558--559  & 127 & $0.87\pm0.03$   & 0.06    \\
572~B1	 &  576.2    & 124 & $0.85$          & $<$0.06       \\
\hline
\end{tabular}}
\medskip
$^1$  Main beam FWHM. \\
$^2$  Main beam efficiency value estimated from previous Jupiter maps.\\
$^3$  Image band gain estimated from telluric lines observed in 
image bands during Earth limb crossing/calibration.\\
$^4$  The 558~GHz tuning (554~GHz LO frequency) is at the edge of the 
total bandwidth (17~GHz centred at 549~GHz) of the receiver and its 
performance is slightly degraded.  
\end{table}