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Testing a Fiery Reentry

9 Oct 2020, 12:01 UTC
Testing a Fiery Reentry
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COLOGNE (ESA PR) — What would a satellite look like as it burns up in the atmosphere? Researchers attempted to duplicate this fiery fate for a bulky satellite electronics box using a plasma wind tunnel.

Their goal was to better understand how satellites burn up during reentry, to minimise the risk of endangering anyone on the ground. Taking place as part of ESA’s Clean Space initiative, the testing occurred inside a plasma wind tunnel at the DLR German Aerospace Center’s site in Cologne.

The item seen here is a section of a satellite electronics box, measuring 300 x 200 x 150 mm across – the full-sized box being too large to fit inside the 120 mm-diameter plasma wind tunnel. This aluminium-made section of box also contained a backplane connected to four electronics cards made of glass fibre reinforced plastic.

The testing investigated the box’s fragmentation behavior, including how the electronics cards were released from the housing, to verify the predictions of reentry simulation software. Other heavy satellite parts were also subjected to this ‘ablation’ testing, including a ball bearing unit, reaction wheel, magnetotorquer, flywheel unit, battery module and battery cells.

In theory reentering space hardware is vaporised entirely in the ...

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