\begin{table}%t3
%\centering
\par
\caption{\label{table3}Line-of-sight components of unsigned IN~magnetic field $\langle \vert B_{\rm LOS}\vert \rangle$, averaged over field of view, at disc centre.}
 \small \begin{tabular}{lcc}
 \hline  \hline
Source & Method & Av. field strength [G] \\
 \hline
\citet{khomenko03} & IR lines & 2.7--4 \\
Dom\'\i nguez Cerde\~na & speckle \& \\
~~~~~~~~~~~ et~al. (2003) & line ratio & 17--21 \\
Lites \& \\
~~Socas-Navarro (2004)  & $V_{\rm tot}$ & 8--10 \\
Orozco Su\'arez \\ 
~~~~~~~~~~~~~et~al. (2007)&  inversion & 3.4 \\
\citet{lites08}  & $V_{\rm tot}$ & 6 \\
Mart\'\i nez Gonz\'alez \\
~~~~~~~~~~~~~et~al. (2008) & inversion & 4.1 \\
Bello Gonz\'alez & speckle \& \\
~~~~~~ \& Kneer (2008) & COG & 2.2 \\
Trujillo Bueno \\
~~~~~~~~~~~ et~al. (2004) & Hanle & $\sim$100 \\
% \hline
this work: \\
observed & speckle \& \\
& COG & 3.0--4.0 \\
simulated, original & at 150~km & 16.1 \\
simulated, original & COG & 10.3 \\
simulated, degraded & COG & 3.2 \\
 \hline
 \end{tabular}
\end{table}