Tranche 1 Transport Layer E is a Space Development Agency mission carrying military data-transport communications satellites for the Proliferated Warfighter Space Architecture. The payloads add to SDA’s optically linked Tranche 1 Transport Layer, which provides low-latency tactical data relay and supports missile-warning/missile-tracking data dissemination. SpaceX’s Falcon 9 launches the mission from Vandenberg Space Force Base into a polar low Earth orbit.

The launch date is currently targeted for Thursday, July 16, 2026 at 8:32 PM (UTC).

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Provider	SpaceX
Vehicle	Falcon 9
Location	SLC-4E Vandenberg SFB California, United States
All dates and times should be submitted in UTC timezone. Use Estimated Date if you don't know the official launch date and time; otherwise, use Window Opens/Closes and/or Planned T-0, which will override the Estimated Date.
— Estimated Date —
Date
— Window Opens —
Date
Time
Launch Date	Thursday, July 16, 2026
Launch Time	8:32 PM (UTC)
Launch Time (Pad)
— Planned T-0 —
Date	Thursday, July 16, 2026
Time	8:32 PM (UTC)
— Window Closes —
Date	Thursday, July 16, 2026
Time	8:32 PM (UTC)

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Series: SDA TTL

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