All launches
TBD

SDA Tranche 2 Transport Layer B

VulcanUnited Launch AllianceSpace Launch Complex 3E
2026 · Date and time TBD

NextMission AnnouncedT-720:00:00

Calendar available when time is confirmed
Time to launch
2026Exact time confirmed closer to launch
Launch window confidence
46% — Uncertain
Mission brief

The mission

Classified mission launched by the Space Development Agency (SDA) for Tranche 2 Transport Layer.

PayloadSDA Tranche 2 Transport Layer B
OrbitPO
CustomerUnited Launch Alliance
Stages2
PadSpace Launch Complex 3E, Vandenberg SFB, CA, USA
Flight plan

Mission timeline

0 / 140%
Up next · Pre-launch

Mission Announced

Official mission announcement and payload assignment

T-720:00:00
12:00 AM UTC
  • Mission AnnouncedT-720:00:00
  • Vehicle RolloutT-48:00:00
  • Wet Dress RehearsalT-24:00:00
The range

Where it leaves Earth

Launch site

Ground vector

Site locked

Space Launch Complex 3E

Vandenberg SFB, CA, USA

Global range
SITE LOCK
Latitude
34.640°N
Longitude
120.590°W

Can I see this?

Distance and a plain visibility call from a place you choose. Trajectory is not modeled — night launches travel farther across the sky than daylight ones.

Save a viewing place to judge this pad from where you stand.

Range weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather rules

Clear — tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

12:00 AM UTC – 12:00 AM UTC

Hardware

Vehicle & provider

Vehicle

Vulcan

Profile →
HeightN/A
LEO PayloadN/A
Launches175
Successes175
Provider

United Launch Alliance

Profile →

USA • Founded 2006

Reliability

Schedule history

No meaningful launch-time or status changes recorded.