\begin{table}%t1
%\centering
\par
\caption{\label{t1}Rough characteristics of some MSDP instruments (see Sects.~2 and 3).}
\begin{tabular}{ll|rrllc|rrrl|crcr|l|lr}
\hline\hline
Telescope & Mode & $N$ & $W_x$ & $f_{\rm t}$ & $f_{\rm s}$ & $l$ & $s$ & $\delta \lambda $ & $n_{\lambda}$ & $\Delta \lambda$ & $p$ & $\delta x $ & $n_{x}$ & $\Delta x$  & $\Delta y$  & $A$ & $Cube$ \\
& & & $"$ & m & m  & mm & pm & pm & & nm & $"$ & $"$ & & $"$ & $"$ & arcmin$^{2}$ & $n_{\lambda}A$\\
\hline
Meudon ST  & (1) & 9  & 72 & 45/2 & 14 & 2.5 & 19 & 31 & 6 & 0.15 & 0.53 & 22.9 & 4 & 68.8 & 465 & 8.9  & 53.3\\ 
\hline
German VTT & (1) & 10 & 23 & 45  & 15 & 0.6 & 3 &  6 & 6 & 0.03 & 0.37 & 2.8 & 5 & 11.0 & 183 & 0.6  &3.4\\ 
& (2) &  9 & 23  & 45  & 15 & 2.5 & 17 & 29 & 7 & 0.18 & 0.37 & 11.5 & 3 & 22.9 & 183 & 1.2  &8.2\\ 
\hline
Themis     & (1) & 16 & 9  & 60  & 7.7 & 0.4 & 4 &  8 & 10 & 0.08 & 0.20 & 1.4 & 7 & 8.3 & 190 & 0.44 & 4.4\\ 
& (2) &  9 & 9 & 60 & 7.7 & 1.2 & 9 & 27 & 7 & 0.16 & 0.20 & 4.1 & 3 & 8.3 & 190 & 0.44 &3.0\\ 
& (3) &  9 & 25 & 60  & 7.7 & 1.2 & 9 & 27 & 5 & 0.11 & 0.20 & 4.1 & 5 & 16.5 & 190 & 0.87 & 4.4\\
\hline
\end{tabular}
\end{table}