\begin{table}%T6 
\par
  \caption{\label{tab:pred-1514h}Predicted rest-frequencies, estimated $1\sigma$ uncertainties, and line strengths
           for $^{15}$NNH$^+$.}
  \small%\centering
\par
  \begin{tabular}{ccccccc}
    \hline\hline\noalign{\smallskip}
    $J'$ & $F'$ & $J$ & $F$ & {Rest frequency} & {Uncertainty} & {Line strength} \\
         &      &     &     & {(MHz)}          & {(kHz)}       &                           \\
    \hline 
     1  &   1  &   0  &   1  &    90~263.4870  &  0.0009  &     1.000  \\ 
     1  &   2  &   0  &   1  &    90~263.9120  &  0.0006  &     1.667  \\ 
     1  &   0  &   0  &   1  &    90~264.4972  &  0.0016  &     0.333  \\ 
     2  &   2  &   1  &   2  &   180~525.2639  &  0.0014  &     0.500  \\ 
     2  &   1  &   1  &   0  &   180~525.3405  &  0.0011  &     0.667  \\ 
     2  &   2  &   1  &   1  &   180~525.6889  &  0.0008  &     1.500  \\ 
     2  &   3  &   1  &   2  &   180~525.7267  &  0.0009  &     2.800  \\ 
     2  &   1  &   1  &   1  &   180~526.3508  &  0.0018  &     0.500  \\ 
     3  &   2  &   2  &   1  &   270~783.5022  &  0.0012  &     1.800  \\ 
     3  &   3  &   2  &   2  &   270~783.5789  &  0.0011  &     2.667  \\ 
     3  &   4  &   2  &   3  &   270~783.6038  &  0.0012  &     3.857  \\ 
     4  &   3  &   3  &   2  &   361~035.4857  &  0.0012  &     2.857  \\ 
     4  &   4  &   3  &   3  &   361~035.5235  &  0.0012  &     3.750  \\ 
     4  &   5  &   3  &   4  &   361~035.5425  &  0.0012  &     4.889  \\ 
     5  &   4  &   4  &   3  &   451~279.5160  &  0.0011  &     3.889  \\ 
     5  &   5  &   4  &   4  &   451~279.5409  &  0.0010  &     4.800  \\ 
     5  &   6  &   4  &   5  &   451~279.5567  &  0.0011  &     5.909  \\ 
     6  &   5  &   5  &   4  &   541~513.6303  &  0.0010  &     4.909  \\ 
     6  &   6  &   5  &   5  &   541~513.6494  &  0.0009  &     5.833  \\ 
     6  &   7  &   5  &   6  &   541~513.6633  &  0.0010  &     6.923  \\ 
     7  &   6  &   6  &   5  &   631~735.8512  &  0.0015  &     5.923  \\ 
     7  &   7  &   6  &   6  &   631~735.8671  &  0.0014  &     6.857  \\ 
     7  &   8  &   6  &   7  &   631~735.8798  &  0.0015  &     7.933  \\ 
     8  &   7  &   7  &   6  &   721~944.1983  &  0.0027  &     6.933  \\ 
     8  &   8  &   7  &   7  &   721~944.2122  &  0.0027  &     7.875  \\ 
     8  &   9  &   7  &   8  &   721~944.2241  &  0.0027  &     8.941  \\ 
     9  &   8  &   8  &   7  &   812~136.6903  &  0.0047  &     7.941  \\ 
     9  &   9  &   8  &   8  &   812~136.7030  &  0.0046  &     8.889  \\ 
     9  &  10  &   8  &   9  &   812~136.7143  &  0.0047  &     9.947  \\ 
    10  &   9  &   9  &   8  &   902~311.3458  &  0.0073  &     8.947  \\ 
    10  &  10  &   9  &   9  &   902~311.3576  &  0.0073  &     9.900  \\ 
    10  &  11  &   9  &  10  &   902~311.3685  &  0.0073  &    10.952  \\ 
    11  &  10  &  10  &   9  &   992~466.1831  &  0.0106  &     9.952  \\ 
    11  &  11  &  10  &  10  &   992~466.1944  &  0.0106  &    10.909  \\ 
    11  &  12  &  10  &  11  &   992~466.2049  &  0.0106  &    11.957  \\ 
    \hline
  \end{tabular}
\end{table}