A 300-pound British radar satellite whose 3 m dish was machine-knitted from gold-plated tungsten wire hitched a ride on Sunday’s Falcon 9, validating a radical manufacturing shortcut that folds launch volume by 75 percent and could seed an entire Ministry of Defence constellation.
Sunday’s SpaceX Twilight rideshare from Vandenberg carried 90-plus spacecraft, but only one can claim it was partly born on a factory floor better known for pullovers. The Carbonite Synthetic Aperture Radar (CarbSAR), built by Surrey Satellite Technology and Oxford Space Systems, swaps machined aluminum for textile automation, knitting gold-coated tungsten into a mesh so fine it is almost transparent yet strong enough to survive launch and the vacuum of space.
From Sweater Mill to Spacecraft Factory
OSS production lead Amool Raina confirms the hardware is literally an off-the-shelf industrial knitting machine retro-fitted to feed 25 µm tungsten wire plated with 2 µm of gold. The wire is sliced into wedge-shaped panels, draped over carbon-fiber ribs, and folded into a 75 cm canister. Once micro-gravity removes the launch load, stored strain energy unfurls the ribs into a perfect 3 m parabola in less than 90 seconds.
- Material cost: 40 % lower than conventional milled reflectors.
- Stowage ratio: 4:1 deployment diameter-to-height versus 1.3:1 for rigid dishes.
- Mass budget: 28 kg total reflector mass, including support structure.
Why Knitting Scales for Defense and Disaster
CarbSAR’s first return already reached SSTL’s Guildford control center, validating the Wrapped Rib Antenna. A 50 cm ground resolution works day-and-night through clouds, giving the U.K. Ministry of Defence an affordable path to revisit any point on Earth every 90 minutes if it fields the proposed six-satellite constellation. Maritime piracy, illegal fishing, and wild-fire mapping are priority targets; the same mesh architecture is being sized for 1.2 m and 6 m variants.
Developer Take-away: Textiles as SDK for Space Hardware
Carbon-fiber booms and knitted metallic fabrics behave like a mechanical SDK: once the strain-energy profile is modeled, new dish sizes or frequencies require only a software tweak to the knitting pattern. OSS is publishing a deployment handbook under a Creative Commons license, letting CubeSat teams order pre-knit reflectors in batches as small as five units with a six-week lead time.
Oxford Space Systems CEO Sean Sutcliffe sums up the philosophy: “Every extra part is a failure opportunity; knitting gives us a monolithic structure with zero fasteners.”
The success of CarbSAR signals more than a quirky headline—it marks the moment industrial textiles became a legitimate aerospace manufacturing node. Expect the next wave of Earth-observation constellations to pack flatter, weigh less, and knit themselves together on orbit.
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