\begin{table}%t1
\caption{\label{table2}Radiometer summary.}
%\centering
\par
\begin{tabular}{l l }
\hline\hline\noalign{\smallskip}
Antenna& 1.1 m offset Gregorian\\
Pointing accuracy&10\asec \\
Pointing stability&4\asec~per hour\\
Frequency range&118.75, 486-504, 541-581 GHz\\
Typical system noise&600, 3300, 3300~K\\
Spectral resolution& 125 to 1000 kHz\\
Backend bandwidth&100 to 1000 MHz\\
Cooling&Stirling cycle to 140~K\\
\noalign{\smallskip}\hline
\end{tabular}
\end{table}