Falcon 9 to Launch SDA Tranche 2 Tracking Layer A — 30 Sept 2026

What is this launch?

SpaceX is set to launch the SDA Tranche 2 Tracking Layer A mission aboard a Falcon 9 Block 5 rocket from Cape Canaveral Space Force Station, Florida. The payload consists of missile-tracking satellites for the U.S. Space Development Agency (SDA), which is building a large low-Earth-orbit constellation known as the Proliferated Warfighter Space Architecture.

The Tracking Layer is the portion of that architecture dedicated to detecting and tracking advanced missile threats, including hypersonic weapons, from orbit. Tranche 2 represents an expanded, next-generation set of these spacecraft that builds on the earlier Tranche 0 and Tranche 1 deployments.

When is the launch?

The mission is currently targeting 30 September 2026 at 00:00 UTC. This is a no-earlier-than (NET) date and the status is listed as TBD, so the schedule may shift as the mission approaches. Always check the latest timing on our rocket launch schedule.

What is the payload?

The SDA Tracking Layer is a proliferated constellation of satellites in low Earth orbit designed to provide global, persistent coverage for detecting and tracking ballistic and hypersonic missiles. Rather than relying on a small number of large, expensive spacecraft in high orbits, the SDA's approach spreads capability across many smaller satellites that can be replaced and upgraded on a rapid cadence.

Tranche 2 continues this model with improved sensors and a larger fleet. Launching in batches on Falcon 9, these satellites feed data into the broader Proliferated Warfighter Space Architecture, working alongside the Transport Layer that handles communications and data relay across the network.

Which rocket is flying?

The Falcon 9 Block 5 is SpaceX's workhorse two-stage rocket, featuring a reusable first stage that returns to Earth for landing and refurbishment. It is the most frequently flown orbital-class rocket in the world and has become a mainstay for U.S. government, commercial, and constellation launches.

For missions to sun-synchronous or specific inclinations from the East Coast, the first stage typically returns to a droneship stationed downrange in the Atlantic, though landing profiles vary by mission requirements.

Where is it launching from?

The launch will take place from Cape Canaveral Space Force Station in Florida. SpaceX operates from Space Launch Complex 40 at the Cape, one of the busiest launch pads on the planet. Explore more missions from this spaceport on our Cape Canaveral launch hub and browse the full SpaceX launch schedule.

How to watch live

SpaceX typically begins its webcast around 15 minutes before liftoff via its official channels. Because this is a national security payload for the Space Development Agency, coverage may be more limited than commercial missions, and details can change close to launch.

You can follow the countdown, launch window, and live status right here on Cosmik, and once the satellites reach orbit you can watch them travel across our live 3D map of the solar system and every satellite in orbit. To learn more about following spacecraft after deployment, see our guide on how to track satellites.

Why does this mission matter?

The SDA Tranche 2 Tracking Layer is part of a rapid buildout of resilient, distributed space-based missile warning and tracking. By deploying many satellites in LEO, the U.S. Space Development Agency aims to close gaps against fast, maneuvering threats that older systems struggle to follow. Each Falcon 9 batch adds coverage and redundancy to the growing network.

Launch data for this mission is sourced from The Space Devs Launch Library. For the latest updates as the date firms up, keep an eye on our latest launch news.

Follow the launch live on Cosmik

Don't miss liftoff — track this Falcon 9 mission in real time on Cosmik, watch the deployed satellites orbit Earth on our live 3D map, and enable free launch alerts so you're notified the moment the countdown begins.