# Project 676602 — Space Based Interceptor

**Program element:** 1203154SF — Long Range Kill Chains  
**Project:** 676602  
**Component:** U.S. Space Force  
**Appropriation:** 3620F — RDT&E, Space Force  
**Budget Activity:** 7 — Operational System Development  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1203154SF/676602  
**Parent:** https://hitchintel.com/programs/1203154SF

## Summary

Project 676602 — Space Based Interceptor requests $1.39B in FY2027, 100% of the $1.39B requested for program element 1203154SF — 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 | 1,392.0 |
| FY2028 | Outyear | 1,398.6 |
| FY2029 | Outyear | 906.7 |
| FY2030 | Outyear | 452.8 |
| FY2031 | Outyear | 461.8 |

> Estimate types are not summed. This project is one leaf of PE 1203154SF; the PE total is the sum of its projects, never added to them.

## What project 676602 buys

This program continues funding for Space Data Network (SDN) in support of United States Space Force (USSF) Space Based Interceptors (SBI), the effort to develop a space-based weapon system to counter-Intercontinental Ballistic Missiles (ICBM) and Counter-hypersonic glide vehicles (HGV). In coordination with Army, Air Force, USNORTHCOM, and USSPACECOM, this funding will support the adoption of a commercially derived Radio Frequency (RF) payload and prototypes for integration onto multiple planes of space vehicles, and launch of the space vehicles. This constellation will be integrated into, and complementary, to the SDN-B. In addition to supporting the SBI program, the Space Data Network - Space Link will augment existing Space Data Network - Backbone users.

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

## Activities (R-2A) — 1

| Activity | FY2025 | FY2026 | FY2027 | Move | Page |
|---|---|---|---|---|---|
| Space Data Network - Space Link | 0.0 | 0.0 | 1,392.0 | new | — |

> 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.

### Space Data Network - Space Link — NEW START

**FY2027 planned work.** Funds support the acceleration of the build-out of the Space Data Network to support the communication needs of the Space-Based Interceptor missile defense system.

**FY2026 to FY2027 change.** FY 27 funding increase reflects the initial request of discretionary funds. FY 26 mandatory funds initiated this effort within the Golden Dome for America account.

**FY2026 plans — current year.** 2026 efforts initiated within the mandatory Golden Dome for America account.

## 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/1203154SF.

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-2A/R-3, PE 1203154SF project 676602 (PB PB2027).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="1203154SF")`.

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