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Pointing calibration

The integration time for each position in a standard 5-point calibration required to achieve a pointing error of $\Delta x$ is given by

\begin{displaymath}
t_{\mathrm{pt}} = \max \left[ \left(\frac{2}{N\Delta\nu}\ri...
... A_{\mathrm{eff}} S_{\nu}}\right)^2, 2~\mathrm{sec} \right]
\end{displaymath} (7.3)

where $\theta$ is the HPBW of the antenna. This calibration is assumed to be repeated every 15 min.



The ALMA OT Team, 2014 May 21