\begin{table}%t2
%\centering
\par
\caption{\label{tbl-2}Hyperfine components of the NH$_3$ $(J,K) = (1,1)$ transition.}
\begin{tabular}{ccccccr@{.}l}
\hline \hline \noalign{\smallskip}
\# & $F'_1$ & $F'$ & $F_1$ & $F$ & Weight & \multicolumn{2}{c}{$v_i$,~\ms} \\ 
\hline\noalign{\smallskip}
1& 1 & 1.5 & 0 & 0.5 & 0.317 & $-19~549$&98(48)  \\[-2pt]
 & 1 & 0.5 & 0 & 0.5 & 0.159 & $-19~411$&73(61)  \\[2pt]
2& 1 & 1.5 & 2 & 2.5 & 0.357 & $-7815$&25(63)  \\[-2pt]
 & 1 & 1.5 & 2 & 1.5 & 0.040 & $-7372$&80(75)  \\[-2pt]
 & 1 & 0.5 & 2 & 1.5 & 0.198 & $-7233$&48(58)  \\[2pt]
3 & 2 & 1.5 & 2 & 2.5 & 0.071 & $-250$&92(60)  \\[-2pt]
 & 1 & 1.5 & 1 & 1.5 & 0.198 & $-213$&00(47)  \\[-2pt]
 & 2 & 2.5 & 2 & 2.5 & 1.000 & $-132$&38(47)  \\[-2pt]
 & 1 & 0.5 & 1 & 1.5 & 0.040 & $-75$&17(75)  \\[-2pt]
 & 2 & 1.5 & 2 & 1.5 & 0.643 & $192$&27(56)  \\[-2pt]
 & 2 & 2.5 & 2 & 1.5 & 0.071 & $311$&03(80)  \\[-2pt]
 & 1 & 1.5 & 1 & 0.5 & 0.040 & $322$&04(35)  \\[-2pt]
 & 1 & 0.5 & 1 & 0.5 & 0.079 & $460$&41(46)  \\[2pt]
4 & 2 & 1.5 & 1 & 1.5 & 0.040 & $7351$&32(49)  \\[-2pt]
 & 2 & 2.5 & 1 & 1.5 & 0.357 & $7469$&67(73)  \\[-2pt]
 & 2 & 1.5 & 1 & 0.5 & 0.198 & $7886$&69(72)  \\[2pt]
5 & 0 & 0.5 & 1 & 1.5 & 0.317 & $19~315$&90(71)  \\[-2pt]
 & 0 & 0.5 & 1 & 0.5 & 0.159 & $19~851$&27(35)\tablefootmark{\dagger}   \\
\noalign{\smallskip}\hline
\end{tabular}
\tablefoot{The velocity offsets, $v_i$, are relative to 23.694495487~GHz. Data from Kukolich (\cite{Kukolich1967}) and Ho (\cite{Ho1977}).  Shown in parentheses are 1$\sigma$ errors. \tablefoottext{\dagger}{The error of 0.35~\ms\ corresponds to the difference between theoretically predicted (Ho \cite{Ho1977}) and astronomically determined (Rydbeck \etal\ \cite{Rydbeck1977}) frequencies.}}
%\vspace*{4mm}
\end{table}