# Falcon 9 Block 5 | SDA Tranche 1 Transport Layer C: launch

> Falcon 9 Block 5 by SpaceX from Vandenberg SFB, CA, USA. Flown: Success.

- Canonical page: https://spacenexus.us/launch/cmtdf16lf00ruoqhxybx0jfei
- This Markdown version: https://spacenexus.us/launch/cmtdf16lf00ruoqhxybx0jfei.md
- Data as of: 2026-10-13 01:45 UTC (last Launch Library 2 sync)
- How the numbers are made: https://spacenexus.us/launch-slips/method

## Facts

- Launch: Falcon 9 Block 5 | SDA Tranche 1 Transport Layer C
- Mission: SDA Tranche 1 Transport Layer C
- Provider: SpaceX
- Rocket: Falcon 9 Block 5
- Pad: Vandenberg SFB, CA, USA
- Country of the launch site: USA
- Date (UTC): Wed, Oct 15, 23:06 UTC (2025-10-15T23:06:06.000Z)
- Status: completed (Launch Library 2: Success)
- Outcome: Success
- Real slips recorded: 0; other date moves (placeholder rolls, firmings), not slips: 0

## Mission description

Quoted from Launch Library 2: Tranche 1 Transport Layer C 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 Lockheed Martin.

## Date history

No date change recorded for this launch since our ledger began.

## Sources

- [Launch Library 2 by The Space Devs](https://thespacedevs.com): launch names, providers, rockets, pads, dates and status
- [SpaceNexus Launch Ledger (our own record of every date change)](https://spacenexus.us/launch-slips/method)
- [Mission information (link from Launch Library 2)](https://www.spacelaunchnow.me/launch/falcon-9-block-5-sda-tranche-1-transport-layer-c)

## Licence and credits

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- Launch facts (names, providers, rockets, pads, dates, status): Launch Library 2 by The Space Devs (thespacedevs.com), credited and not relicensed by SpaceNexus.
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