SDA Tranche 1 Tracking Layer D

Vulcan, United Launch Alliance

Space Launch Complex 3E, Vandenberg SFB, CA, USA

Launch time

No earlier than

NET 2026

Year precision To be determined

Current date is a placeholder or rough estimation based on unreliable or interpreted sources.

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How sure is this date?

The source gives year precision. Launch plans can change.

Source updated Tue 17 Mar, 14:58 CET

Updated 11 Oct, 00:22 CEST

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Slip history

No changes since we started tracking on Sat 10 Oct 2026, 10:32 UTC.

Mon 15 Sept 2025, 11:25 UTCLL2 update
NET 2026.
Read the source update
Fri 9 Jun 2023, 14:08 UTCLL2 update
Adding launch
Read the source update

Mission

SDA Tranche 1 Tracking Layer D on Vulcan from Space Launch Complex 3E. Launch time, status and recorded date changes from Launch Library 2.

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.

Mission type: Government/Top Secret
Orbit: Polar Orbit

Launch timeline

No timeline has been provided by the source.

Launch pad

Space Launch Complex 3E

Vandenberg SFB, CA, USA (US)

Coordinates: 34.64, -120.5895

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