Quasi-static wavefront control for the Advanced Technology Solar Telescope
2012
The Advanced Technology Solar Telescope (ATST) requires active control of quasi-static telescope aberrations
in order to meet image quality standards set by its science requirements. Wavefront control is managed by
the Telescope Control System, with many telescope subsystems playing key roles. We present the design of
the ATST quasi-static wavefront and alignment control architecture and the algorithms used to control its four
active mirrors. Two control algorithms are presented, one that minimizes force on M1 actuators and another that
employs a neutral-pointing constraint on M2 to reduce pointing error. We also present simulations that generate
typical daily active mirror trajectories which correct optical misalignments due to changing gravitational and
thermal loads.
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- Correction
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