\begin{table}%t4
%\centering
\par
\caption{Beam characteristics for the geometric optical conjugate of the
  cold stop (geometrical beam), the Saturn observations (main beam), and
  a combination of the Saturn observations and a telescope model (full
  beam).}
  \label{beam_tab}
    \begin{tabular}{lcccc}
      \hline
      \hline
      Band&1&2&3&4\\
      \hline
      Wavelength [$\mic$] &200&260&360&580\\
      Geometrical beam {\it FWHM} [$^{\prime}$]&2.0&2.0&2.5&3.5\\
      Main beam {\it FWHM} [$^{\prime}$]&1.91&1.85&2.21&3.12\\
      Main beam solid angle
      [$^{\prime^{2}}$]&4.00&3.87&5.06&9.69\\
      Full beam solid angle 
[$^{\prime^{2}}$]&4.02&3.90&5.14&10.01\\
      \hline
      \end{tabular} 
\end{table}