\begin{table}%t3
%\centering
\par
\caption{\label{t3}Rough scanning times and temporal resolutions of THEMIS/MSDP (mode 1) for different polarimetric analysis.} 
\begin{tabular}{l|ll|ll|ll|l}
\hline\hline
 &Stokes parameters & $I+S$ and $I-S$ & $N_{\rm G}$ & $N_{\rm S}$ & $t_{\rm {step}}$ & $T_{\rm {tot}}  $ & $\partial A/\partial t$ \\ 
 &  & synchronous &  & & $5''\times 160''$ & $130''\times 160''$ & arcmin$^2$/mn\\ 
 &  & (grid)      &  & &   & &  \\
\hline
1 & $I(+Q-Q+U-U+V-V)$  &  yes        &   4   &   6   &   28~s          &   12~mn      &  0.5  \\
2 & $I(+V-V)$          &  yes        &   4   &   2   &   14~s          &    6~mn      &  1     \\
3& $I(+Q-Q+U-U+V-V)$   &  no         &   1   &   6   &   7~s          &    3~mn      &  2     \\
4& $I(+V-V)$           &  no         &   1   &   2   &   3.5~s        &   1.5~mn     &  4     \\
\hline
\end{tabular}
\end{table}