\begin{table}%T2
\caption{\label{observationsdetails}Observations overview.}
\smallskip
%\centering
\par
\begin{tabular}{ccccccc}
\hline
\hline
\noalign{\smallskip}
Wavelength & Frequency range &   Calibrators   &Observation ID & RT9--RTA     & Start date (UTC) & End date (UTC)\\
           &    (MHz)        &                 &               &   (m)       &                  &               \\ 
\hline \noalign{\smallskip}
           &                 &                 & 10702691 & 36 & 2007/06/18 17:00:15 & 2007/06/19 04:58:50\\
           &                 &   3C286, CTD93  & 10702898 & 54 & 2007/06/28 16:20:55 & 2007/06/29 04:19:25\\
25~cm      & 1159--1298~MHz  &   3C147, 3C138  & 10702958 & 72 & 2007/07/03 16:01:15 & 2007/07/04 03:59:45\\
           &                 &                 & 10703066 & 90 & 2007/07/10 15:33:45 & 2007/07/11 03:10:35\\ 
\noalign{\smallskip}\hline \noalign{\smallskip}
           &                 &                 & 10602227 & 36 & 2006/05/09 19:36:20 & 2006/05/10 07:35:20\\
           &                 &                 & 10602239 & 48 & 2006/05/10 19:32:20 & 2006/05/10 07:31:20\\
           &                 & DA240, 3C~295,   & 10602259 & 60 & 2006/05/11 19:28:20 & 2006/05/12 07:27:20\\
85~cm      & 310--380~MHz    & PSR1937+21,     & 10602224 & 72 & 2006/05/16 19:08:40 & 2006/05/17 07:07:40\\
           &                 & 3C48            & 10602372 & 84 & 2006/05/19 18:57:00 & 2006/05/20 06:56:00\\
           &                 &                 & 10602340 & 96 & 2006/05/22 18:45:10 & 2006/05/23 06:44:10\\ 
\noalign{\smallskip}\hline \noalign{\smallskip}
           &                 &                 & 10702727 & 36 & 2007/06/21 16:48:15 & 2007/06/22 04:47:05\\
           &                 &                 & 10703226 & 48 & 2007/07/19 14:58:05 & 2007/07/20 02:56:55\\
           &                 & DA240, 3C~295,   & 10703186 & 60 & 2007/07/17 15:05:55 & 2007/07/18 03:04:45\\
2~m        & 115--175~MHz    & PSR1937+21,     & 10703004 & 72 & 2007/07/05 15:53:15 & 2007/07/06 03:52:05\\
           &                 & 3C48            & 10703056 & 84 & 2007/07/09 15:37:25 & 2007/07/10 03:36:15\\
           &                 &                 & 10703099 & 96 & 2007/07/12 15:25:35 & 2007/07/13 03:24:25\\ 
\hline
\end{tabular} 
\end{table}