Space Development Agency wants to update the standard for its orbital mesh network – By Nathan Strout (C4ISRNET) / April 21 2021
WASHINGTON — Before its first satellites are on orbit, the Space Development Agency is reaching out to industry for feedback on how it should upgrade its communications standards for its second generation of satellites.
Established in 2019, the agency was charged with developing the National Defense Space Architecture, a proliferated constellation to eventually be made up of hundreds of satellites mostly operating in low Earth orbit. The backbone of the architecture is the transport layer, a mesh network on orbit connected through optical intersatellite links. The transport layer will allow the DoD to rapidly move data through space, and will be the glue that will connect the services’ various Combined Joint All Domain Command and Control networks.
“The whole idea is to be able to move data as rapidly as possible to get that tactical information directly to the war fighter,” said SDA Director Derek Tournear at the annual C4ISRNET Conference. “So what the transport layer consists of are hundreds of satellites that form a resilient optically interconnected mesh network that will pass data directly to existing tactical data links. So what that means to the war fighter is the following: I can now move data from a targeting cell that could be located CONUS or ideally that targeting cell will actually form a target onboard on the satellites and I can send that data down directly to an existing tactical data link on a weapons platform or on a weapon itself.”
SDA is using a spiral development approach to build out the NDSA, putting up new tranches of satellites every two years. The first set of 28 satellites — tranche 0 — will begin launching in 2022 and provide a war fighter immersion capability. Tranche 1 will have closer to 150 satellites and will be an operational system.
