UNITED LAUNCH ALLIANCE
Vulcan | SDA Tranche 1 Tracking Layer E
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Dec 31, 2026 at 00:00 UTC
▸ Flight profile›
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MISSION OVERVIEW
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.
LAUNCH DETAILS
VEHICLE
Vulcan
AGENCY
United Launch AllianceMISSION
SDA Tranche 1 Tracking Layer E
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Polar Orbit
LAUNCH PAD
Space Launch Complex 3ELAUNCH SITE
Vandenberg SFB, CA, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
TENTATIVEPrecision: Half-year
LAUNCH LIBRARY 2 PRIMARY
API ID: fcbc4550-e69e-4458-a9e6-4a5b6b6b15a5
Reported date: Dec 31, 2026 at 00:00 UTC
Last synced: 13 minutes ago
This launch date is approximate. The provider has not confirmed an exact date or time yet. The schedule may change.
SCHEDULE & STATUS HISTORY
DELAYED(92 days)
Aug 27, 2026 at 16:13 UTCSep 30, 2026 00:00 → Dec 31, 2026 00:00 UTC
Source: Launch Library 2
DELAYED(92 days)
Jun 19, 2026 at 15:38 UTCJun 30, 2026 00:00 → Sep 30, 2026 00:00 UTC
Source: Launch Library 2
LAUNCH MAP
PAD WEATHER
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VEHICLE
MANUFACTURER
United Launch Alliance
VARIANT
Vulcan
Vulcan
FREQUENTLY ASKED QUESTIONS
When is the Vulcan | SDA Tranche 1 Tracking Layer E launch?
The Vulcan | SDA Tranche 1 Tracking Layer E is scheduled for Thursday, December 31, 2026 at 12:00 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: TBD.
What rocket is being used for SDA Tranche 1 Tracking Layer E?
The Vulcan | SDA Tranche 1 Tracking Layer E mission uses the Vulcan rocket, manufactured by United Launch Alliance.
Where is the Vulcan | SDA Tranche 1 Tracking Layer E launching from?
The launch takes place from Space Launch Complex 3E at Vandenberg SFB, CA, USA.
What orbit is SDA Tranche 1 Tracking Layer E going to?
The SDA Tranche 1 Tracking Layer E mission is targeting Polar Orbit.
Who is launching SDA Tranche 1 Tracking Layer E?
The Vulcan | SDA Tranche 1 Tracking Layer E is operated by United Launch Alliance.
Can I watch the Vulcan | SDA Tranche 1 Tracking Layer E launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
LAUNCH TIMELINE
Aug 27, 2026 16:13 UTC
Launch delayed by 92 days
Sep 30, 2026 00:00 UTC u2192 Dec 31, 2026 00:00 UTC (via Launch Library 2)
Jun 19, 2026 15:38 UTC
Launch delayed by 92 days
Jun 30, 2026 00:00 UTC u2192 Sep 30, 2026 00:00 UTC (via Launch Library 2)
May 1, 2026 06:43 UTC
Launch added to tracker
Imported from Launch Library 2 API
May 1, 2026 06:43 UTC
Launch date set: Dec 31, 2026 at 00:00 UTC
NET (No Earlier Than) confirmed by SpaceX
LIVE DATA SOURCES
Last data sync: 13 minutes ago
●Launch Library 213 minutes ago
Launch ID: fcbc4550-e69e-4458-a9e6-4a5b6b6b15a5
●Open-Meteo Weather18 hours ago
Pad weather at 34.64, -120.59
Mission Profile
SDA Tranche 1 Tracking Layer E is a Vulcan mission operated by United Launch Alliance set to lift off from Space Launch Complex 3E, Vandenberg SFB, CA, USA on December 31, 2026. The flight is tasked with delivering its payload on a government/top secret mission to Polar Orbit.