# Project 643731 — Transport

**Program element:** 1206410SF — Space Technology Development and Prototyping  
**Project:** 643731  
**Component:** U.S. Space Force  
**Appropriation:** 3620F — RDT&E, Space Force  
**Budget Activity:** 4 — Advanced Component Development & Prototypes  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1206410SF/643731  
**Parent:** https://hitchintel.com/programs/1206410SF

## Summary

Project 643731 — Transport requests $1.07B in FY2027, 86% of the $1.25B requested for program element 1206410SF, up 43% on FY2026. 2 R-2A activities decompose the request.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 1,193.5 |
| FY2026 | Enacted | 747.4 |
| FY2027 | Request | 1,068.5 |
| FY2028 | Outyear | 930.3 |
| FY2029 | Outyear | 338.7 |
| FY2030 | Outyear | 273.4 |
| FY2031 | Outyear | 278.9 |

> Estimate types are not summed. This project is one leaf of PE 1206410SF; the PE total is the sum of its projects, never added to them.

## What project 643731 buys

SDA is rapidly developing and demonstrating next generation space capabilities for the joint warfighter enabled by proliferation of satellites in Low Earth Orbit (LEO) and expedited acquisition model utilizing rapid spiral development. SDA is developing capabilities to address a wide range of Department of War (DoW) space needs that align with the United States Space Force Space Warfighting framework and includes space-based battle management and a ground support infrastructure. SDA will orchestrate the rapid development and fielding of the Proliferated Warfighter Space Architecture (PWSA), a resilient military sensing and data transport capability via a proliferated space architecture in LEO. This program element funds the development and demonstration of space technologies to deliver space-based command and control, tasking, mission processing and dissemination capabilities, as well as an integrated, resilient network of ground support capabilities, to U.S. joint warfighting forces in bi-annual tranches, which began in FY 2022.

**R-3 lines of work:** Product Development.

## Activities (R-2A) — 2

| Activity | FY2025 | FY2026 | FY2027 | Move | Page |
|---|---|---|---|---|---|
| Transport | 1,182.8 | 679.0 | 1,068.5 | +57% | [a0](https://hitchintel.com/programs/1206410SF/643731/a0) |
| Classified Program | 10.7 | 5.9 | — | −100% | — |

> Activities carry the prior, current and budget year only — no five-year plan. In the request year they partition this project exactly; in earlier years they can under-cover it.

### Transport

Tranche 0 - Conduct residual experimentation in support of Proliferated Warfighter Space Architecture (PWSA) Transport Risk Reduction. - End-of-life fleet operations Tranche 1 - Complete system level verification and Developmental Testing. - Complete Operational Testing of Transport Layer Tranche 1 (TLT1) capabilities. - Conduct space…

Full year-by-year narrative: https://hitchintel.com/programs/1206410SF/643731/a0

### Classified Program

**FY2026 to FY2027 change.** Due to the classified nature of this project, specific details are available at a higher classification level.

**FY2026 plans — current year.** Due to the classified nature of this project, specific details are available at a higher classification level.

## What is NOT on this page

Congressional marks, the R-2 mission description and acquisition strategy, the industry vs government split of the whole request, and related program elements are recorded at **program-element** grain — an NDAA mark lands on a PE, never on a project. They are at https://hitchintel.com/programs/1206410SF.

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-2A/R-3, PE 1206410SF project 643731 (PB PB2027).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="1206410SF")`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*