A row of Transport Layer Tranche 1 satellites made by Lockheed Martin for the Space Development Agency. Credit: Lockheed Martin NATIONAL HARBOR, Md. — The Space Development Agency (SDA) is gearing up ...

What is the transport layer? The transport layer is Layer 4 of the Open Systems Interconnection (OSI) communications model. It is responsible for ensuring that the data packets arrive accurately and ...

ICEYE and Nokia Partner to Develop Sovereign LEO Satellite Communications Systems for Defense BEC Technologies Launches MX-340-IRD Hybrid Cellular and Satellite Gateway for Remote Infrastructure ...

A SpaceX Falcon 9 rocket on Sept. 10, 2025, launched 21 satellites for the Space Development Agency's Tranche 1 Transport Layer from Vandenberg Space Force Base, California. Credit: SpaceX WASHINGTON ...

The Space Development Agency has sought proposals from industry to design and build satellites for the first tranche of the National Defense Space Architecture’s transport layer. SDA expects the ...

The transport layer in the Space Development Agency's National Defense Space Architecture (NDSA). Photo: SDA The Tranche 1 Transport Layer (T1TL) is a mesh network of optically interconnected ...

21 satellites built by York Space Systems satellites for Tranche 1 Transport Layer of the SDA's PWSA, stacked before a SpaceX launch. Photo: York Space Systems Update: SpaceX launched the SDA mission ...

Terran Orbital Corporation (“Terran Orbital”), a vertically integrated provider of end-to-end satellite solutions, announced that its wholly-owned, Tyvak Nano Satellite Systems, Inc., was awarded a ...

The Space Development Agency has awarded Lockheed Martin (NYSE: LMT), Northrop Grumman (NYSE: NOC) and York Space Systems prototype agreements valued at approximately $1.8 billion combined to build ...