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SOLIS observation control system

The SOLIS (Synoptic Optical Long-term Investigations of the Sun) project is constructing new telescopes to replace the Vacuum Telescope at Kitt Peak. Among other goals, SOLIS is to continue observations that have been in progress over the last 25 years, using a new set of instruments. Solar observing differs from other astronomical observing in several key ways: exposures tend to be short and yet still produce large volumes of data--the expected data rate is a sustained 56 MBytes per second with peaks of 132 MB/s. The overwhelming majority of observations are synoptic although the ability to respond to unscheduled events (e.g. solar flares) is a cornerstone of the system. Precise time constraints are typical observation requirements.