Overview paper introducing the Sunrise III balloon-borne solar observatory, its 2024 flight, data volume, and the focus issue containing first scientific results.
Sunrise III: The Wavefront Correction System
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abstract
This paper describes the wave-front correction and image stabilisation system (CWS) developed for the Sunrise III balloon-borne telescope, and provides information about its performance as measured during the integration into the telescope and during the 2024 science flight. The fast image stabilisation is done by a correlation tracker (CT) and a fast tip-tilt mirror, low order aberrations such as defocus and coma are measured by a six-element Shack-Hartmann wavefront sensor (WFS) and corrected by an active telescope secondary mirror for automated focus and manual coma correction. The CWS is specified to deliver a stabilised image with a precision of 0.005 arcsec (rms). The autofocus adjustment is specified to maintain a focus stability of 0.01 waves in the focal plane of the CWS.
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Sunrise III: Instrument, mission, data, and first results
Overview paper introducing the Sunrise III balloon-borne solar observatory, its 2024 flight, data volume, and the focus issue containing first scientific results.