SpaceX SDA Tranche 1 Transport Layer E Falcon 9 Block 5
Rocket Launch Video Stream
SpaceX: SDA's Third Tranche 1 MissionRocket Launch Trajectory & Flight Path
Track the complete rocket launch trajectory with real-time flight data from FlightClub.io . View detailed telemetry including rocket velocity, altitude progression, thrust levels, acceleration, orbital insertion parameters, and 3D flight path visualization throughout all mission phases from liftoff to orbit.
Rocket Launch Timeline
Track every phase of the rocket launch with our detailed mission timeline. From T-minus countdown events and pre-launch preparations through liftoff, stage separation, and orbital insertion, follow each critical milestone in real-time. Our comprehensive launch sequence timeline includes payload integration, propellant loading, engine ignition, and post-launch telemetry tracking.
| View Complete Launch Timeline | |
|---|---|
| T- 00 : 38 : 00 | GO for Prop Load Launch director verifies go for propellant load |
| T- 00 : 35 : 00 | Prop Load Start of propelland loading |
| T- 00 : 35 : 00 | Stage 1 LOX Load Start of liquid oxygen loading in the first stage |
| T- 00 : 16 : 00 | Stage 2 LOX Load Start of liquid oxygen loading in the second stage |
| T- 00 : 07 : 00 | Engine Chill Start of engine chilling |
| T- 00 : 01 : 00 | Startup The onboard computer takes control over the countdown and runs last checks |
| T- 00 : 01 : 00 | Tank Press Fuel tanks are pressurized to flight levels |
| T- 00 : 00 : 45 | GO for Launch Launch director verifies go for launch |
| T- 00 : 00 : 03 | Ignition Start of the engine ignition sequence |
| T+ 00 : 00 : 00 | Liftoff First upwards movement of the rocket |
| T+ 00 : 01 : 14 | Max-Q Maximum dynamic pressure |
| T+ 00 : 02 : 29 | MECO Cut-off of the main engine |
| T+ 00 : 02 : 33 | Stage 2 Separation Separation of the second stage from the first |
| T+ 00 : 02 : 41 | SES-1 First start of the second engine |
| T+ 00 : 03 : 21 | Fairing Separation Separation of the payload fairing |
| T+ 00 : 06 : 23 | Entry Burn Startup Start of the atmospheric entry burn |
| T+ 00 : 06 : 46 | Entry Burn Shutdown End of the atmospheric entry burn |
| T+ 00 : 08 : 13 | Stage 1 Landing Burn Start of the first stage landing burn |
| T+ 00 : 08 : 35 | SECO-1 First cut-off of the second engine |
| T+ 00 : 08 : 37 | Stage 1 Landing Landing of the first stage |
About the SDA Tranche 1 Transport Layer E Mission
- Type: Government/Top Secret
- Orbit: Polar Orbit
- Launch Cost: $52,000,000
Tranche 1 Transport Layer E 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 tolerance.
This launch carries 21 satellites manufactured by York Space Systems.
Launch Pad & Location
Space Launch Complex 4E
Vandenberg SFB, CA, USA
The Space Launch Complex 4E launch pad has hosted 282 rocket launches, including 282 orbital launch attempts. The Vandenberg SFB, CA, USA launch site has been the location for 898 total rocket launches.
Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.
SpaceX Falcon 9 Block 5 Rocket
Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability.
Booster Landing & Recovery
Core B1103
The Falcon 9 first stage B1103 will land on ASDS OCISLY after its 4th flight. Reusable booster B1103 last flew on 06/19/2026 and has completed 3 successful launch and landing missions. Falcon 9 booster.
Of Course I Still Love You - OCISLY
The second ASDS barge, Of Course I Still Love You (OCISLY) services launches in the Pacific Ocean and was the site of the first landing of a SpaceX Falcon 9 first stage during CRS-8, the launch of a Dragon spacecraft to the International Space Station.
Autonomous Spaceport Drone Ship - ASDS
An autonomous spaceport drone ship (ASDS) is an ocean-going vessel derived from a deck barge, outfitted with station-keeping engines and a large landing platform. Construction of such ships was commissioned by aerospace company SpaceX to allow for recovery of rocket first-stages at sea for high-velocity missions which do not carry enough fuel to return to the launch site after lofting spacecraft onto an orbital trajectory.
About SpaceX
Space Exploration Technologies Corp., known as SpaceX, is an American aerospace manufacturer and space transport services company headquartered in Hawthorne, California. It was founded in 2002 by entrepreneur Elon Musk with the goal of reducing space transportation costs and enabling the colonization of Mars. SpaceX operates from many pads, on the East Coast of the US they operate from SLC-40 at Cape Canaveral Space Force Station and historic LC-39A at Kennedy Space Center. They also operate from SLC-4E at Vandenberg Space Force Base, California, usually for polar launches. Another launch site is being developed at Boca Chica, Texas.
Frequently Asked Questions
When is the SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch scheduled?
The SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch is currently scheduled for:
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Launch times are subject to change based on weather conditions, technical readiness, and range availability. Check back regularly for the most up-to-date launch time and status updates.
Where can I watch the SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch live stream?
You can watch the SpaceX Falcon 9 launch live stream on this page. The official live video feed typically begins 15-30 minutes before liftoff and includes full mission coverage with multiple camera angles, onboard views, and expert commentary covering pre-launch procedures, liftoff, stage separation, and payload deployment.
Where is the SpaceX Falcon 9 SDA Tranche 1 Transport Layer E mission launching from?
The SpaceX Falcon 9 rocket will launch from Space Launch Complex 4E at Vandenberg SFB, CA, USA. Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX. For viewing location recommendations and tips, check the launch location details above.
What rocket is being used for the SDA Tranche 1 Transport Layer E mission?
The SDA Tranche 1 Transport Layer E mission will launch aboard a SpaceX Falcon 9 rocket. Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability. Detailed rocket specifications and performance data are available in the rocket details above.
Will the SpaceX Falcon 9 booster for SDA Tranche 1 Transport Layer E attempt a landing?
Yes, the Falcon 9 first stage booster will attempt a Autonomous Spaceport Drone Ship at a designated landing zone. Booster recovery allows SpaceX to reuse rocket components, significantly reducing launch costs. Watch the live stream to see the landing attempt in real-time. Learn more about the landing details.
What weather conditions could delay the SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch?
The SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch can be delayed by various weather conditions including lightning within 10 nautical miles, high winds (especially upper-level winds), thick cloud layers, precipitation, and poor visibility. Weather must be favorable at the launch site, downrange landing zones, and abort landing sites. Check the launch weather forecast above for current conditions and probability of favorable weather.
How can I get updates if the SpaceX Falcon 9 SDA Tranche 1 Transport Layer E launch is delayed?
This page is updated in real-time with the latest SpaceX Falcon 9 launch status, including any delays or scrubs for the SDA Tranche 1 Transport Layer E mission. You can also check our space launch schedule for the most current information. Enable push notifications through our mobile app to receive instant alerts about launch status changes, weather holds, or new launch times. We recommend following official SpaceX live streams for the most immediate range updates.