UPDATE July 8: This story was updated to reflect comments made by DARPA on the in-orbit status of two Astro Digital-built satellites carrying optical inter-satellite links from SA Photonics.
PARIS — Optical inter satellite links (OISLs), once as rare as hen’s teeth, are now popping up regularly.
Veteran Tesat Spacecom of Germany and the German Aerospace Center, DLR, pioneered their use and, with Airbus Defence and Space, developed what is still the only commercial deployment of . . .
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