# SG-XX

**R-2A activity** of project 65A041 — SG-XX  
**Program element:** 1206425SF — Space Situation Awareness Systems  
**Component:** U.S. Space Force · **Budget Activity:** 5  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1206425SF/65A041/a0  
**Parent:** https://hitchintel.com/programs/1206425SF/65A041

> **NEW START.** $370.9M requested in FY2027 with no prior-year and no current-year funding.

## Summary

This activity requests $370.9M in FY2027, 100% of project 65A041 — a new start with no prior-year and no current-year money. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

## What the FY2027 request buys

**FY2027 planned work.** FY 2027 continues the development and build of the first SG-XX constellation increment. Space Vehicle (SV) providers will support design reviews and initiate efforts critical to timely and cost-effective SV production. SV providers will collaborate and coordinate with the ground-based systems provider and other SV providers to establish common standards and protocols, improving mission effectiveness. Ground development and integration efforts will begin, and efforts will include mission unique software development and integration into an enterprise ground network construct. Additionally, the development of training curriculum and preparations for operator training will commence. Technology enhancements and prototyping efforts for space-based space domain surveillance against evolving threats, may include, but are not limited to: future upgrades, extension and augmentations through analysis, studies, demonstrations, and experimentation. FY 2027 will seek opportunities for commercial, international, academic, and Federally Funded Research and Development Center (FFRDC) partnerships. Efforts will include implementation of mission data processing and data dissemination efforts. Efforts will include the integration of YSG-XX prototyping efforts into the SG-XX technical baseline, which will inform future SG-XX spacecraft and sensor development. YSG-XX prototype activities will focus on completing host development, integration, and preparations for the launch and on-orbit demonstration of two commercial spacecraft. This demonstration will enhance system resiliency and situational awareness for operations in the contested space domain. System Engineering, Integration and Test (SEIT) efforts may include, but are not limited to: technology road mapping and improving coordination and collaboration across SG-XX Ground and SV segments, collaboration with other SDA programs (e.g. RG-XX), and down-stream programs anticipated to leverage SG-XX mission capabilities. Working groups will be coordinated and established, facilitating risk mitigation and cross-program collaboration, facilitating system-of-system integration and effectiveness. Activities may include, but are not limited to: program office support, studies, technical analysis, experimentation integration and test of command and control (C2), resiliency measures, risk mitigation, mission partner interfaces, commercial and international partner engagement, space test/combat range events and office support, etc.

**FY2026 to FY2027 change.** FY 2027 funding increase reflects the initial request of discretionary funds for the SG-XX program for continued development of the first SG-XX constellation increment. FY 2026 mandatory funds initiated this effort.

## Before the request year

**FY2026 plans — current year.** The efforts described in the description are resourced with mandatory funds within this program element in FY 2026.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2026 | Enacted | 0.0 |
| FY2027 | Request | 370.9 |

> Prior, current and budget year only — an R-2A activity carries no five-year plan. It sums exactly into its project in the request year and not necessarily in any other.

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibit R-2A, PE 1206425SF project 65A041 (PB PB2027). Narrative is the government's own text.
- **No marks, no contractors at this grain** — congressional marks land on the program element and R-3 performers on the project.
- **MCP:** `mcp.hitchintel.com` — `budget_get_activity`.

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