SpaceXFalcon 9 Block 5Space Launch Complex 4E, Vandenberg SFB, CA, USA

SDA Tranche 1 Tracking Layer A

Launch window

NET Q4 2026Add to calendar

To Be Determined

Image: SpaceX

Summary

SDA Tranche 1 Tracking Layer A is expected to launch on a SpaceX Falcon 9 Block 5 from Space Launch Complex 4E, Vandenberg SFB, CA, USA in Q4 2026. It is SpaceX's 782nd launch, 163rd this year and humanity's 7,531st orbital launch attempt. It is planned as the 651st Falcon 9 Block 5 flight and the 125th this year. The payload is bound for Polar Orbit (PO).

Watch: No webcast announced yet.
Vehicle: Falcon 9 Block 5 · SpaceX
Booster: No booster details available.
Mission: Government/Top Secret · Polar Orbit (PO)for SDA
Milestone: Planned as the 651st Falcon 9 Block 5 flight · 125th this yearSpaceX's 782nd launch163rd this yearhumanity's 7,531st orbital launch attempt358th orbital launch attempt this year

Flight preview

Orbit: representative

POOrbit

90.0°Inclination

180°Launch azimuth

Target site default for this orbit type. Not a catalogued object; this panel switches to the tracked orbit once the object is catalogued. Ascent simulated from a published stage table.

About this launch

Tranche 1 Tracking Layer A is one of five missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Tracking Layer constellation, which will provide global indications, warning, tracking, and targeting of advanced missile threats, including hypersonic missile systems.

Pad

Space Launch Complex 4E, Vandenberg SFB, CA, USA

Planned as the 324th launch from Space Launch Complex 4E, 86th this year · 950th from Vandenberg SFB, CA, USA

303 launches from this pad · 919 from Vandenberg SFB, CA, USA

67 days after the previous launch from this pad

All launches from Vandenberg SFB, CA, USA Open in maps

Updates

NET September.

Cosmic_Penguin · Aug 27, 2026 · source

Show 2 earlier updates

NET May-Q2 (unclear which of the lettered groups will fly first).
Cosmic_Penguin · 1/28/2026 · source
Adding launch
Nosu · 10/31/2023 · source

Questions

When does SDA Tranche 1 Tracking Layer A launch?

SDA Tranche 1 Tracking Layer A is scheduled in Q4 2026.

Where can I watch SDA Tranche 1 Tracking Layer A live?

No webcast has been announced yet.

What rocket is launching SDA Tranche 1 Tracking Layer A?

Falcon 9 Block 5, flown by SpaceX. Falcon 9 Block 5 spec sheet

Where is SDA Tranche 1 Tracking Layer A launching from?

Space Launch Complex 4E, Vandenberg SFB, CA, USA.

What orbit is SDA Tranche 1 Tracking Layer A going to?

Polar Orbit (PO), a government/top secret mission.