WASHINGTON — The Space Development Agency for the first time demonstrated space-to-ground data communications from low Earth orbit satellites launched earlier this year.
In three demonstrations held over the past several days, Link 16 terminals on three satellites in orbit were able to talk to radios on the ground, SDA said Nov. 28.
Operators transmitted multiple messages from satellites using L-band radios aboard Tranche 0 Transport Layer satellites made by York Space to a ground test site outside the United States. SDA did not disclose the precise location and only said it was within the territory of a Five Eyes partner nation.
SDA building a proliferated LEO network
SDA is a U.S. Space Force organization building a space data network — called the Proliferated Warfighter Space Architecture — that includes a transport layer and a missile-tracking sensor layer. The agency aims to deploy an internet in space that can move data from satellite to satellite, and pass information to military systems on the ground, at sea and in flight.
The agency has 23 Tranche 0 satellites in orbit launched by SpaceX in April and September — 19 communications satellites for the transport layer and four missile-tracking spacecraft.
The Link 16 demonstration marks a major milestone as SDA’s transport layer satellites will be space nodes of the military’s Link 16 network – an encrypted tactical data protocol used to connect aircraft, ships, and ground vehicles so they can exchange data, including text, voice messages, and imagery. In operation since the 1970s, Link 16 is a line-of-sight network, and extending it into space would provide beyond line-of-sight connectivity.
“I can’t underscore enough the significance of this technical achievement as we demonstrate the feasibility of the Proliferated Warfighter Space Architecture and its ability to deliver space-based capabilities to the warfighter over existing tactical data links,”…
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