The Salto demonstrator is a complete 1-m class telescope with a single-conjugated Rayleigh laser guide star adaptive optics (AO) system. The project aims to benchmark robust AO operations for astronomy giving an opportunity to upgrade medium size telescopes (1-4 m diameter) around the world and boost their scientific yield. But it is also a benchmark for optical communications and space debris tracking under mediocre seeing conditions, far worse than astronomical standards. Indeed, the foreseen location of the telescope is at the premises of Redu Space Services in the Belgian countryside. In our contribution, we review the overall design of the AO instrument from the optical definition to the real-time computer implementation. We discuss the integration, the calibration, and operational aspects of the instrument. Finally, we present the successful first on-sky operations, reaching the diffraction limit at 1.55μm under 2-3” seeing.
PLATO is an exoplanet hunting mission of the European Space Agency. It is a medium-class mission, with a launch foreseen in 2026. Its prime objective is to uncover Earth-sized planets residing in their habitable zone. The payload consists in 26 cameras with a very wide field of view. These cameras consist in a Telescope Optical Unit, aligned at ambient and characterised at the operational temperature, and a Focal Plane Array bearing the detectors, and delivered after coupling with the Front End Electronics. In this contribution, we report on the alignment of the Engineering Model camera of Plato, i.e., the input metrology, the mechanical alignment of the optical unit with the focal plane array, the test environment and the optical characterisation throughout the process until the integrity check after delivery to the cryo-vacuum testing facility where the camera underwent a thorough performance demonstration. We also give a detailed description of the bolting process and the associated error budget.
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