RDT&E Project · President's Budget PB2027

SG-XX

Project 65A041·PE 1206425SF — Space Situation Awareness Systems·U.S. Space Force·BA5
FY2027 Request
$370.9M
◆ New start in FY2027
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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.

New start

This project requests $370.9M in FY2027 with no prior-year and no current-year funding. There is no incumbent line to compare it with — it did not exist before this President's Budget.

FY2027 Request
$370.9M
No FY2026 funding
FY2026 Enacted
$0.0M
No FY2025 funding
FY2025 Actual
$0.0M
Prior year
Project detail

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
Funding trajectory

Project 65A041 funding, FY2025–FY2031

Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.

15030045000.0FY25ACTUAL0.0FY26ENACTED370.9FY27REQUEST365.4FY28496.0FY29377.7FY30126.7FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual0.0
FY2026Enacted0.0
FY2027Request370.9
FY2028Outyear365.4
FY2029Outyear496.0
FY2030Outyear377.7
FY2031Outyear126.7
Inside the project

1 accomplishment / planned program

The R-2A exhibit — the only level of the budget that describes work that has not happened yet. Activities carry the prior, current and budget year only, no five-year plan. Each describes FY2027 work in enough detail to have its own page; the rest are shown here in full. Coverage is partial across the corpus, so count activities, never total them.

FY2025 actual
FY2026 enacted$0.0M
FY2027 request$370.9M

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…

Read the FY2027 plan →