\begin{table}%t1[h]
\caption{Characteristics of the instruments.}
%\centering
\par
\begin{tabular}{lr}
\hline\hline
diameter & 32.5~cm \\
focal lengh & 6~m \\
longitude & 0h 12m 17s E \\
latitude & 50$^{\circ}$36$'$57$''$ N \\
altitude & 32~m \\
receptor & camera CCD HiSys 22, 14 bits \\
pixel    &    0$\farcs$3 \\
field    &    176 pix $\times$ 176 pix \\
\hline
\end{tabular}
\label{tab:materiel}
\end{table}