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ESA – Proba-3’s laser-precise positioning

February 29, 2024
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ESA – Proba-3’s laser-precise positioning
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An infrared view of a laser-based take a look at marketing campaign – happening at Redwire Space in Kruibeke, Belgium – which represents essential preparation for ESA’s precision formation flying mission, Proba-3.

Later this 12 months, two satellites shall be launched collectively into orbit to take care of formation relative to one another down to a couple millimetres, creating a synthetic photo voltaic eclipse in house. Proba-3’s ‘Occulter’ spacecraft will solid a shadow onto the opposite ‘Coronagraph’ spacecraft to dam out the fiery face of the Solar and make the ghostly photo voltaic corona obtainable for sustained commentary for as much as six hours per 19.5 hour orbit.

Nevertheless to take care of the place of a shadow just some centimetres throughout on the Coronagraph satellite tv for pc from the Occulter satellite tv for pc round 150 m away, the 2 satellites depend on a set of sensors, together with intersatellite radio hyperlinks, GNSS, visible imaging and – for probably the most exact positioning at closest vary – a laser metrology (or ‘measurement of measurement’) system. This technique will shoot a laser from the Occulter spacecraft towards a nook dice retroreflector positioned on the face of the Coronagraph spacecraft for monitoring of relative place and perspective (pointing path), reaching millimetre precision.

“To calibrate Proba-3’s laser metrology system, its efficiency was examined inside the 60-m lengthy Redwire cleanroom,” explains Damien Galano, Proba-3’s mission supervisor. “The Coronagraph’s laser was mirrored off a retroreflector and the ensuing positioning measurements checked in opposition to absolute ‘floor reality’ utilizing a separate laser monitoring system.”

This mission is being put collectively for ESA by a consortium led by Spain’s Sener, with participation by greater than 29 corporations from 14 nations. The Proba-3 platforms have been designed by Airbus Defence and Space in Spain and satellite tv for pc integration by Redwire in Belgium. GMV in Spain is answerable for Proba-3’s formation flying subsystem whereas its predominant coronagraph instrument comes from Belgium’s Centre Spatial de Liège, CSL. Proba-3 is because of be launched by PSLV-XL launcher from India in September.



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