\begin{table}%t1 %\centering \par \caption{\label{tabobs}List of MIDI observations of W33A.} \begin{tabular}{cccccc} \hline \hline \noalign{\smallskip} & UT date & Stations & $B$ & PA & Seeing\tablefootmark{a} \\ & & & (m) & (\degr) & (\arcsec) \\ \hline Config.~A & 2008-06-21 & U2-U3 & 42.03 & 15.04 & 0.65\\ Config.~B & 2008-04-22 & U3-U4 & 57.95 & 119.69 & 1.08\\ Config.~C & 2008-04-21 & U3-U4 & 61.08 & 114.57 & 0.52\\ Config.~D & 2005-09-16 & U2-U3 & 45.58 & 47.31 & 1.00\\ \hline \end{tabular} \tablefoot{Executed in the high-sens mode at a spectral resolution of $R=30$. Configuration~D was already presented in \cite{2007ApJ...671L.169D}. \tablefoottext{a}{Seeing is the one measured by the DIMM.}} \end{table}