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

SDA Tranche 1 Tracking Layer D

Launch window

No countdown — this launch time is not yet known to the minute.

NET Q4 2026Add to calendar

To Be Determined

Image: SpaceX

Summary

SDA Tranche 1 Tracking Layer D 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 780th launch, 161st this year and humanity's 7,532nd orbital launch attempt. It is planned as the 671st Falcon 9 Block 5 flight and the 145th 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 671st Falcon 9 Block 5 flight · 145th this yearSpaceX's 780th launch161st this yearhumanity's 7,532nd orbital launch attempt359th 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 D 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

Map of Space Launch Complex 4E

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

Planned as the 331st launch from Space Launch Complex 4E, 93rd this year · 957th from Vandenberg SFB, CA, USA

306 launches from this pad · 922 from Vandenberg SFB, CA, USA

31 days after the previous launch from this pad

All launches from Vandenberg SFB, CA, USAOpen in maps

Updates

Launch vehicle swap with SDA Tranche 1 Tracking Layer E.

Cosmic_Penguin · Oct 25, 2026 · source

Show 2 earlier updates

  • NET 2026.

    Cosmic_Penguin · 9/15/2025 · source

  • Adding launch

    Jay · 6/9/2023 · source

Questions

When does SDA Tranche 1 Tracking Layer D launch?

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

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

No webcast has been announced yet.

What rocket is launching SDA Tranche 1 Tracking Layer D?

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

Where is SDA Tranche 1 Tracking Layer D launching from?

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

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

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