Vulcan | SDA Tranche 2 Transport Layer B
United Launch Alliance is targeting 2026 for Vulcan carrying SDA Tranche 2 Transport Layer B from Space Launch Complex 3E, Vandenberg SFB, CA, USA, United States of America. Launch Library files only the year, so the date is a placeholder. The date is still provisional and can move.
COUNTDOWN
FLIGHT PLAN
There's no launch window filed yet. Current date is a placeholder or rough estimation based on unreliable or interpreted sources.
FIELD KIT / OPTICS
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MISSION BRIEF
Classified mission launched by the Space Development Agency (SDA) for Tranche 2 Transport Layer.
SOURCE: LAUNCH LIBRARY 2 // THE SPACE DEVS
LAUNCH CORRIDOR
- Due east
- The lowest inclination a direct launch from here can reach is 34.6°. That’s this pad’s own latitude. Flying east also gets the most free speed from Earth’s rotation.
- Due south
- The polar corridor, at 90° inclination, passes over both poles. It gets no help from Earth’s spin, so the same rocket can carry less.
Drag the globe to turn it. The shading is the real terminator, and it moves.
A globe of the Earth centred on Space Launch Complex 3E at latitude 34.64 degrees north, longitude 120.59 degrees west. Two curved lines leave the pad. The solid gold line runs due east and marks the lowest orbital inclination a direct launch from this site can reach, 34.6 degrees, equal to the pad’s latitude of 34.6 degrees. The dashed cyan line runs due south and marks the polar corridor at 90 degrees inclination. The darkened part of the globe is the night side. The surface wind is from 102° at 14 km/h. That's the cyan arrow at the pad.
LAUNCH SITE
Space Launch Complex 3E
Vandenberg SFB, CA, USA, United States of America
OBSERVED 2026-11-11 09:45:00Z // OPEN-METEO (CC BY 4.0) // GENERAL CONDITIONS, NOT LAUNCH CRITERIA
Minimum direct inclination 35°. This pad is 35° north of the equator, so a direct launch can't reach an orbit inclined less than 35°. An orbit of inclination i never passes over latitudes beyond ±i. Getting to an equatorial orbit, which geostationary satellites need, takes a 35° plane change at some point in the flight. Inclinations of 35° and up are reachable straight off the pad. The ground here moves east at about 383 m/s with Earth's spin. That's 465 m/s at the equator, falling with the cosine of latitude. A launch due east keeps that head start.
DATUM WGS-84 // EQUIRECTANGULAR PROJECTION // ORBIT FIGURES DERIVED FROM THE PUBLISHED LATITUDE
Open this pad in a mapPAD CONDITIONS
SURFACE WIND @ 10 M
14km/h
Blowing from the east-south-east, bearing 102 degrees
GUSTING
17km/h
Clear sky
SOURCE: OPEN-METEO CC BY 4.0
The observed figures are general weather at the coordinates of Space Launch Complex 3E. They aren’t the launch rules. The operator and the range write those for each mission, and they cover things this forecast doesn’t carry, like electric fields, cloud layers higher up and winds along the rocket’s path. Only the operator publishes them. Wind often stops a countdown, but no number here is a limit for this flight. Nothing here is a go or no-go call. No operator figure was published for this attempt.