\begin{table}%t1
\caption{Correlation coefficients, $r_{\rm c}$, and slopes  of the linear fits to the scatter plots of modelled total solar irradiance based on SPM~data~vs. composite and ACRIM~II~measurements for different time periods.}
\label{tab:he}
%\centering
\par
\begin{tabular}{c@{ vs. }cccc}
\hline \hline
\multicolumn{2}{c}{Comparison} & Time period & $r_{\rm c}$ & Slope  \\
\hline
Reconstr. & composite & 1992--2003 & 0.94 & $1.003 \pm 0.080$ \\
Reconstr. & composite & 1992--1996 & 0.86 & $0.932 \pm 0.022$ \\
Reconstr. & composite & 1996--2003 & 0.93 & $1.018 \pm 0.011$ \\
Reconstr. & ACRIM~II  & 1992--2001 & 0.84 & $1.006 \pm 0.017$ \\
Reconstr. & ACRIM~II  & 1992--1996 & 0.78 & $1.049 \pm 0.034$ \\
Reconstr. & ACRIM~II  & 1996--2001 & 0.81 & $0.958 \pm 0.023$ \\
ACRIM~II & VIRGO & 1996--2001 & 0.89 & $1.046 \pm 0.013$ \\
\hline
\end{tabular}
\end{table}