To Be Determined

Vulcan | SDA Tranche 1 Tracking Layer E

December 31, 2026 at 12:00 AM UTC

Vandenberg SFB, CA, USA

Vulcan | SDA Tranche 1 Tracking Layer E launch image — Mission imagery · Vulcan

LAUNCH TIME UNCONFIRMED

T−00d00h00m00s

December 31, 2026 at 12:00 AM UTC

Status: To Be Determined · Live feed refreshes every 30 seconds

Space Launch Complex 3E

Vandenberg SFB, CA, USA · 34.6400, -120.5895

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Rocket: Vulcan
Launch site: Space Launch Complex 3E
Launch probability: Not published
Window opens: December 31, 2026 at 12:00 AM UTC
Window closes: December 31, 2026 at 12:00 AM UTC
Feed updated: October 25, 2026 at 4:57 AM UTC

Mission description

Tranche 1 Tracking Layer E 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.

Vehicle

Vulcan

Vulcan · Vulcan

Height

—

Diameter

5.4 m

LEO capacity

0 kg

Successful launches

Launch complex

Space Launch Complex 3E

Vandenberg SFB, CA, USA

Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.

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Connected program records