SDA Tranche 1 Tracking Layer D
Falcon 9 Block 5, SpaceX
Space Launch Complex 4E, Vandenberg SFB, CA, USA
Launch time
No earlier than
NET Q4 2026
Current date is a placeholder or rough estimation based on unreliable or interpreted sources.
How sure is this date?
The source gives quarter 4 precision. Launch plans can change.
Launch record updated by LL2
Feed checkedMission
SDA Tranche 1 Tracking Layer D on Falcon 9 Block 5. NET Q4 2026. Status: TBD. Launch site: Space Launch Complex 4E. Source: 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 context
Generated from source records
SDA Tranche 1 Tracking Layer D: Falcon 9 Block 5, operated by SpaceX. Pad: Space Launch Complex 4E, Vandenberg SFB, CA, USA. Mission type: Government/Top Secret; target orbit: Polar Orbit. Listed timing: NET Q4 2026. TBD means this is a provisional date. Vehicle: 283/283 resolved orbital outcomes succeeded (100%) in our records since 4 Jan 2025. Pad: 132 orbital attempts in our records since 10 Jan 2025.
Partial historical coverage. Records snapshot: .
What these records cover
Partial coverage of stored records, not lifetime or worldwide totals. Counts use known orbital attempts with a source date at or before this snapshot and a status confirming liftoff or an outcome. Scheduled, upstream-missing, suborbital and unknown-orbit records are excluded. Source dates are NET estimates, not verified actual liftoff times.
The vehicle percentage is Success / (Success + Failure + Partial Failure). In Flight and Payload Deployed count as attempts but are excluded from that denominator. Figures describe the stored record at this snapshot, not the vehicle's flight number or a prediction of this launch's outcome.
Launch Library 2 record checked . Recorded timing does not establish actual liftoff; plans can change.
Launch data: The Space Devs (Launch Library 2)Launch timeline
No timeline has been provided by the source.
Slip history
Changes recorded by Space Right Now
Tracking since . 1 recorded change.
- Recorded change
Date became more certain: from Year to Quarter 4
Source updates from Launch Library 2 (3)
Announcements supplied by LL2 may predate our tracking. They are separate from changes observed by Space Right Now.
- LL2 update
Launch vehicle swap with SDA Tranche 1 Tracking Layer E.
Read the source update - LL2 update
NET 2026.
Read the source update - LL2 update
Adding launch
Read the source update
Launch pad
Space Launch Complex 4E
Vandenberg SFB, CA, USA (US)
Coordinates: 34.632, -120.611
View launch pad on a map