# Project 65A041 — SG-XX

**Program element:** 1206425SF — Space Situation Awareness Systems  
**Project:** 65A041  
**Component:** U.S. Space Force  
**Appropriation:** 3620F — RDT&E, Space Force  
**Budget Activity:** 5 — System Development & Demonstration  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1206425SF/65A041  
**Parent:** https://hitchintel.com/programs/1206425SF

## Summary

Project 65A041 — SG-XX requests $370.9M in FY2027, 28% of the $1.32B requested for program element 1206425SF — a new start, with no prior-year and no current-year money. 1 R-2A activity decomposes the request, 1 new this cycle.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 0.0 |
| FY2027 | Request | 370.9 |
| FY2028 | Outyear | 365.4 |
| FY2029 | Outyear | 496.0 |
| FY2030 | Outyear | 377.7 |
| FY2031 | Outyear | 126.7 |

> Estimate types are not summed. This project is one leaf of PE 1206425SF; the PE total is the sum of its projects, never added to them.

## What project 65A041 buys

Space Systems Command/Space Delta 89/Space Surveillance and Reconnaissance Branch (SSC/SYD89/SYZ) is developing, prototyping, demonstrating, and executing the next generation Surveillance Geosynchronous Earth Orbit (GEO) program (SG-XX) to replace SILENTBARKER capabilities. This SDA effort satisfies one of five core competencies of the Space Force and is the effective identification, characterization, and understanding of any factor, passive or active, associated with the space domain that could affect space operations and thereby impact the security, safety, economy, or environment of our nation. As the foundation for space control, SDA encompasses surveillance of all space objects and activities: detailed surveillance of specific space assets; monitoring space environmental conditions; monitoring cooperative space assets; gathering indications and warning on adversary space operations; and conducting integrated command, control, communications, processing, analysis, dissemination, and archiving activities. These programs fall within the Space Domain Awareness (SDA) mission area which provides the space-based architecture required to detect, track, catalogue, and identify objects and activities in the space domain. This program element expands surveillance SDA capabilities, deploying a constellation of new proliferated SVs, which plans to integrate with existing, but evolving Space Control operations. Activities funded in this program element (1206425SF) also support efforts such as engineering studies and analyses, architectural engineering studies, trade studies, technology maturation, modernization initiatives, systems engineering, system development, risk mitigation, test & evaluation, and may include prototyping and technology demonstrations, such as the YSG-XX prototype program which directly applies commercial practices and risk reduction activities for SG-XX. SG-XX provides SDA capabilities and capacity to detect, track, and characterize threats to high value U.S. and allied satellites and is the USSF led follow-on to the SILENTBARKER program. SG-XX will use a flexible acquisition construct enabling concurrent and rapid onboarding of multiple new SV vendors, incorporate allied nation partnerships, and leverage commercial capabilities and services. SG-XX requirements for Space Based SDA are aligned with capabilities documented in the U.S.

**R-3 lines of work:** Product Development; Management Services.

## Activities (R-2A) — 1

| Activity | FY2025 | FY2026 | FY2027 | Move | Page |
|---|---|---|---|---|---|
| SG-XX | — | 0.0 | 370.9 | new | [a0](https://hitchintel.com/programs/1206425SF/65A041/a0) |

> 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.

### SG-XX — NEW START

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…

Full year-by-year narrative: https://hitchintel.com/programs/1206425SF/65A041/a0

## 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/1206425SF.

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-2A/R-3, PE 1206425SF project 65A041 (PB PB2027).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="1206425SF")`.

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