
Copernical Team
Cool test of Proba-V companion during preparation for 'thermal balance' testing

A test version of ESA's Proba-V Companion CubeSat seen during preparation for 'thermal balance' testing in the Agency's Mechanical Systems Laboratory at its ESTEC technical centre in the Netherlands.
Space is a place where it is possible to be hot and cold at the same time, if one part of your satellite is in sunlight and another face in shade. A satellite's interior needs to maintain a steady temperature to go on operating properly.
Accordingly this 'structural and thermal model' of the Proba-V Companion CubeSat was placed inside the Large Vacuum Facility of ESA's Mechanical Systems Laboratory—employed to test large satellite systems or complete small satellites—for a week-long exposure to temperature extremes in space-quality vacuum.
Developed by prime contractor Aerospacelab in Belgium for ESA, this mission is a 12-unit 'CubeSat' – a small, low-cost satellite built up from standardized 10-cm boxes. It will fly a cut-down version of the vegetation-monitoring instrument aboard the Earth-observing Proba-V to perform experimental combined observations with its predecessor.
Launched in 2013, Proba-V was an innovative 'gap filler' mission between the Vegetation instruments monitoring global plant growth aboard the full-size Spot-4 and -5 satellites and compatible imagery coming from Copernicus Sentinel-3, the first of which flew in 2016.
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