\begin{table}%t10
%\centering
\par
\caption{Polynomial part of the~$\psi_A$ development (units in arcseconds) for various~$\Delta H$ sources used in our study, with respect to P03: comparison of (1) P03 (Capitaine et~al.  \cite{Capitaine2003}) -- (2) Difference between P03 and Geod04 (i.e. the effect of the total~$\Delta H$) -- (3) Difference between P03 and the effect of the~$\Delta H$ residuals.}\label{tab:Geod04}
%\centering
$$
\begin{tabular}{llccc}
\hline
\hline
\noalign{\smallskip}
Angle      &   Source                   &    ~$t$               &    ~$t^2$           &    ~$t^3$         \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
           &(1) {\it P03}               & {\it~$5038\farcs481507$} & {\it~$-1\farcs079007$} & {\it~$-0\farcs001140$}  \\
\noalign{\smallskip}
\cline{2-5}
\noalign{\smallskip}
\noalign{\smallskip}
$\psi_A$   &                            & \multicolumn{3}{c}{$\overbrace{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}^{\mbox{Differences wrt P03 in~$\mu$as}}$}\\ 
           &(2) Geod04 total contributions &        0           &      $-7000 $         &      2            \\
\noalign{\smallskip}
	   &(3) Geod04 residuals 
	    ~$\left\{
	     \begin{tabular}{l}
	     1985$-$1998   \\
	     1985$-$2002              
	     \end{tabular}
	     \right.$                   &\begin{tabular}{l}
					 0 \\ 
					 0
					 \end{tabular}&\begin{tabular}{c}
						       $-1495$ \\
						       $-7000$ 
						       \end{tabular}&\begin{tabular}{l}
							             1   \\
								     2  
								     \end{tabular} \\
\hline
\end{tabular}
$$
\end{table}