T-ZERO Launch tracker

SDA Tranche 1 Transport Layer A launch time, date and countdown

Go Oct 5, 2026, 3:17 AM CDT

Countdown

Launch time: (Mon, Oct 5, 2026, 08:17 UTC)

Launch details

US Central
UTC
Mon, Oct 5, 2026, 08:17 UTC
Status
Go Go for Launch
Provider
SpaceX (Commercial)
Rocket
Falcon 9 Block 5
Mission
SDA Tranche 1 Transport Layer A
Mission type
Government/Top Secret
Orbit
Polar Orbit
Pad
Space Launch Complex 4E
Location
Vandenberg SFB, CA, USA
Country code
USA

Times can change. Central time is America/Chicago (CST/CDT). Source: Launch Library 2.

About this launch

SDA Tranche 1 Transport Layer A is a launch of the Falcon 9 Block 5 rocket operated by SpaceX. It is scheduled for Mon, Oct 5, 2026, 3:17 AM CDT (Mon, Oct 5, 2026, 08:17 UTC). The launch window is instantaneous, so the launch happens at the exact time above or not at all that day. The launch site is Space Launch Complex 4E, Vandenberg SFB, CA, USA. The target orbit is Polar Orbit. Mission type: Government/Top Secret. Launch Library 2 lists the current status as “Go for Launch”.

Mission description

Tranche 1 Transport Layer A is one of six missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer constellation, which will provide assured, resilient, low-latency military data and connectivity worldwide to the full range of warfighter platforms from Low Earth Orbit satellites. The constellation will be interconnected with Optical Inter-Satellite Links (OISLs) which have significantly increased performance over existing radio frequency crosslinks. It is expected to operate over Ka band, have stereo coverage and be dynamically networked for simpler hand-offs, greater bandwidth and fault t...

How to watch

T-ZERO does not host or embed any video. Close to launch time, check the launch provider’s own website or social channels for a live stream. Launch times often move, so reload this page for the latest schedule.

Webcast links listed by Launch Library 2 (they open on an external site):

Add to your calendar

Subscribe (.ics) to all upcoming launches. In your calendar app you can also add the URL webcal://t-0.space/calendar.ics as a subscribed calendar.

Related