\begin{table}%t1
\caption{\label{tab1}LFI specifications for sensitivity\tablefootmark{a} and angular resolution.}
%\centering
\par
\begin{tabular}{rccc}
\hline\hline \noalign{\smallskip}
 & 30 GHz & 44 GHz & 70 GHz  \\
\hline \noalign{\smallskip}
$\Delta T_{30}$ [$\mu$K]\tablefootmark{b} \dotfill       &8&8&8 \\
$\Delta T_{30}/T$ \dotfill & $3\times10^{-6}$ & $3\times10^{-6}$ & $3\times10^{-6}$ \\
Angular resolution [\arcm] $\ldots$ \dotfill         & 33 & 24 & 14 \\
$\Delta T/T$ per pixel \dotfill            & $2.6\times10^{-6}$ & $3.6\times10^{-6}$&        
        $6.2\times10^{-6}$ \\
$N_{\rm feeds}$  \dotfill                  &2&3&6  \\
$N_{\rm radiometers}$  \dotfill            &4&6&12 \\
$\delta T_{\rm 1~s}^{\rm A}$ [$\mu$K~s$^{1/2}$]\tablefootmark{c} \dotfill & 234&278&365 \\
$\Delta\nu_{\rm eff}$ [GHz]  \dotfill      &6&8.8&14 \\
$T_{\rm sys}$ [K]\tablefootmark{d}  \dotfill          &10.7&16.6&29.2 \\[2pt]
\hline
\end{tabular}
\tablefoot {\tablefoottext{a}{Sensitivities per pixel are specified for a nominal mission survey time of 15~months;}
\tablefoottext{b}{$\Delta T_{30}$~indicates the noise per 30\arcm~reference pixel;}
\tablefoottext{c}{antenna temperature;}
\tablefoottext{d}{thermodynamic temperature.}}
\end{table}