\begin{table}
   \caption{Observational parameters}
   \label{obspara}
  {\begin{tabular}{lll}\hline\hline
  Wavelength                      & $\lambda$6\ cm & $\lambda$11\ cm   \\
  Frequency                       & 4800\ MHz    & 2639\ MHz           \\
  Bandwidth                       & 600\ MHz     & 80\ MHz            \\
  HPBW [\arcmin ]                 & 9.5          & 4.4                \\
  aperture efficiency[\%]        & 62           &  53                \\
  beam efficiency[\%]             & 67           &  58                \\
  $T_{\rm sys}$[K]                & 22           &  17                \\
  $T_{\rm B}[{\rm K}]$/$S$[Jy]                & 0.164        & 2.52               \\
  Main Calibrator                 & 3C286        & 3C286              \\
  \ \ \   Flux Density            & 7.5\ Jy      & 11.5\ Jy           \\
  \ \ \   Polarization Percentage & 11.3\%       & 9.9\%              \\
  \ \ \   Polarization Angle      & 33$\degr$    & 33$\degr$          \\
  No. of coverages                &  9           & 7                   \\
  pixel integration time [s]    & 7            & 3.5                  \\
  rms in TP [mK]                & 0.7          &  3.5               \\
  rms in PI [mK]                & 0.3          &  1.7               \\\hline
  \end{tabular}}
\end{table}