\begin{table}%T1 \caption{\label{tab:Tab1}Estimates of the minimum flux density detectable at $X$ and $S$-bands for the baselines used for EC025A and EC025B (Eb~=~Effelsberg, Mc~=~Medicina, Nt~=~Noto, On~=~Onsala, Ro~=~Robledo), for geodetic-style, dual-frequency $S/X$~observations recorded at~1~Gb/s during 5-min long scans. A radio source is considered detected if the ${\it SNR }\geq 7$.} \small%\centering \par \begin{tabular}{lcccccccccc} \hline \hline \noalign{\smallskip} & \multicolumn{10}{c}{Minimum flux density detectable (mJy)} \\ %\noalign{\smallskip} & Eb--Mc & Eb--Nt & Eb--On & Mc--Nt & Mc--On & Nt--On & Eb--Ro & Mc--Ro & Nt--Ro & On--Ro \\ %\noalign{\smallskip} \hline %\noalign{\smallskip} $X$-band & 3 & 5 & 5 & 25 & 29 & 45 & 0.7 & 4 & 6 & 7 \\ \noalign{\smallskip} $S$-band & 13 & 17 & 21 & 28 & 32 & 47 & 3 & 5 & 6 & 8 \\ \hline \end{tabular} \end{table}