Recent advances in electronics and software for the METIS coronagraph aboard solar orbiter
2013
METIS is a visible and UV externally inversely occulted coronagraph selected to fly aboard the Solar Orbiter space
mission. Thanks to its own capabilities and exploiting the peculiar opportunities offered by the SO mission profile, the
instrument will address some of the still open issues in understanding the physics driving the observed processes in the
corona and characterizing the slow and fast components of the solar wind.
Recently the METIS design went thorough a significant revision involving the overall electronics configuration and
software functionalities, comprehensive of descoping of some features but also aiming at the improvement of the
instrument’s reliability. As a result the electronics architecture has been simplified enabling an effective cold-strapped
redundancy scheme of some subsystems, while the preliminary SW database has been defined as well.
We also identified the scientific processing algorithms implementing the instrument functionalities and the imagecompression
capabilities able to match the selected HW resources providing an optimal compromise between complexity
and compression ratio.
This paper describes the revised electronics and software design developed in order to maximize the overall scientific
returns with the updated instrument configuration approaching the Phases C/D of the project.
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