\begin{table}%t2
%\centering
\par
\caption{Different normalized-to-maximum weighting sets used to obtain the
$DM_{2}$conjugation altitude. Values marked with superindex $^{\textrm{"a''}}$
should be further reduced when requiring proper arrangement of the~NGSs.\label{tab:w-sets}}
\par
\begin{tabular}{ccccc}
\hline\hline
\multicolumn{1}{c}{GS Configuration}&
\multicolumn{1}{c}{$w_{1}$}&
\multicolumn{1}{c}{$w_{2}$}&
\multicolumn{1}{c}{$w_{3}$}&
\multicolumn{1}{c}{$w_{4}$}\\
\hline 
3 NGS @ $30\arcsec $&
1.00&
1.00&
$9\times 10^{-4}$$^{{\rm a}}$&
0.03$^{{\rm a}}$\\
3 NGS @ $45\arcsec $&
1.00&
1.00&
$9\times 10^{-3}$$^{{\rm a}}$&
0.1$^{{\rm a}}$\\
5 NGS @ $45\arcsec $&
1.00&
0.60&
$6\times 10^{-5}$$^{{\rm a}}$&
0.008$^{{\rm a}}$\\
4 NGS @ $45\arcsec $ + NGS&
1.00&
0.60&
$6\times 10^{-5}$$^{{\rm a}}$&
0.008$^{{\rm a}}$\\
4 LGS @ $41\arcsec $ + NGS&
1.00&
0.40&
0.22&
0.47\\
4 LGS @ $56\arcsec $ + NGS&
1.00&
0.40&
0.44&
0.67\\
5 LGS @ $56\arcsec $ + NGS&
1.00&
0.30&
0.44&
0.67\\
Hybrid: 4 Na LGS &
1.00&
0.20&
1.00&
1.00\\
Hybrid: 5 Na LGS &
1.00&
0.15&
1.00&
1.00\\
\hline
\end{tabular}
\end{table}