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David Buscher edited untitled.tex
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\textit{Oh, an empty article!} \section{Introduction}
The Automated Alignment System (AAS) and Back End Active Stabilization of Shear and Tilt (BEASST) together serve to align the beam trains in the MROI and to keep these aligned during the night. An design for the AAS has been developed to the level of a Conceptual Design Review (CDR) and additional development has been performed since then to prototype some subsystems of the AAS. We propose here a modification to the AAS which will allow the existing goals to be met but which would allow drifts in alignment during the night to be addressed much more robustly using BEASST. At the same time, some of the constraints on the BEASST system can be relaxed, allowing a more performant system to be built more quickly.
\section{Requirements for the AAS and BEASST}
The function of the combined AAS and BEASST systems can be briefly described as:
\begin{enumerate}
\item When a new beam train is installed or configured, coarse alignment of tilt and shear are required to allow a reference beam to pass between the beam combining area (BCA) and the unit telescope mount (UTM).
\item At the beginning of each observing night the beam train needs to be aligned so that beams of starlight arriving at the beam combiners meet the tilt and shear error budget requirements.
\item During the night, these requirements need to be maintained in the presence of thermal drifts, expected to be particularly severe on the optics at the UTM and in the BRS which exposed to diurnal temperature changes.
\item
\end{enumerate}
to ensure that the beam trains from each telescope to the beam combiners are aligned such that (a)
\section{Outline of the existing scheme}
\section{Proposed modification}
\section{Advantages and disadvantages}
\section{Recommendation}
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