On board processing procedures for the Solar Orbiter METIS coronagraph

摘要: Solar Orbiter is an ESA space mission devoted to improve the knowledge of those effects nowadays still not fully understood on physical mechanisms underlying behaviour our star. The has a peculiar trajectory that will bring S/C close Sun up 0.28 AU, exploiting opportunity follow star as never before. METIS, one instruments selected be part payload, coronagraph that will investigate inner heliosphere performing imaging in visible band and hydrogen Lyman α line @ 121.6 nm. METIS will able simultaneously operate two detectors: Intensified APS for UV channel and an light, Liquid Crystal Variable Retarder (LCVR) plate, broadband polarimetry. They operated by means centralised management unit instrument, Processing Power Unit. This payload subsystem hosts microprocessor implements, thanks application software, all needed functionalities fully control instrument subsystems its own processing capabilities. Both sensors be readout at high rate acquired data shall undergo through preliminary on-board maximize the scientific return provide necessary information validate results ground. Being deepspace mission, some procedures have been designed efficient autonomous behaviour case immediate reaction required arising transient events or occurrence safety hazards condition. implement algorithm automatic detection this kind order to promptly react autonomously adapt observing procedure.