\begin{table}%t4
\caption{\label{tab:telemetry}Main raw data for the two programmes with time sampling.}
\par
%\centerline
{\begin{tabular}{l c c c}
\hline\hline
			Variable  & Programme & Sampling (s)& Comment  \\
			\hline
			Mean offset  &  AS  & 1 &  Averaged on 1024 pixels, ($\rm {ADU~px^{-1}}$) \\
			Bright pixel number & AS & 1 & Number of pixels brighter than $n\sigma$ \\
			Offset variance & AS & 1 & Readout noise,  ($\rm {ADU~px^{-1}}$)   \\
			\hline
			Star Intensity & AS & 1& Total inside the aperture, (ADU) \\
			Baricentre $X$ &  AS & 1 & star $X$ position, (px) \\			
			Baricentre $Y$ & AS & 1& star $Y$ position, (px) \\
			\hline
			Background Intensity & AS & 1 & Pixels brighter than $n\sigma$ are not included in the mean, $\rm{ADU~px^{-1}}$ \\
			Bright pixel number in background window & AS & 1 & Number of pixels brighter than $n\sigma$\\
			\hline
			Offset & PF  & 32 & mean offset, $\rm {ADU~px^{-1}}$ \\
			Background & PF & 32 and 512 & mean background, $\rm {ADU~px^{-1}}$ \\
			Star white flux & PF & 32 and 512 & star total intensity in the aperture, $\rm {ADU}$ \\
			Star ``red'' flux & PF & 32 and 512 & star total intensity in the red part of the aperture, $\rm {ADU}$ \\
			Star ``green'' flux & PF & 32 and 512 & star total intensity in the green part of the aperture, $\rm {ADU}$ \\
			Star ``blue'' flux & PF & 32 and 512 & star total intensity in the blue part of the aperture, $\rm {ADU}$ \\
			\hline
		\end{tabular}}
\par
		\medskip
		Note: on the AS channel the offset and background
	are subtracted on board.
\end{table}