# Long Range Kill Chains — Program Element 1203154SF

**Program element:** 1203154SF  
**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

## Summary

U.S. Space Force requests $1.39B in FY2027 against nothing enacted in FY2026, before stepping down 67% across the five-year plan. In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators funded it in full.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 250.2 |
| 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 — the profile mixes actuals, enacted law, the request, and outyear projections.

## Congressional marks (FY2027)

| Stage | Marked ($M) | Change ($M) |
|---|---|---|
| Request | 1,392.0 | — |
| House NDAA (HASC) | 1,392.0 | +0.0 |
| Senate NDAA (SASC) | 1,392.0 | +0.0 |
| House Approps (HAC-D) | 1,392.0 | +0.0 |

> FY2027 NDAA authorization marks, as of 2026-07-27. Not appropriations or final law.

## Projects (3)

| Project | Title | FY2025 actual | FY2026 enacted | FY2027 request | Move |
|---|---|---|---|---|---|
| 676602 | Space Based Interceptor | 0.0 | 0.0 | 1,392.0 | new start |
| 671113 | Auxiliary Payloads | 235.2 | 0.0 | 0.0 | — |
| 676601 | Golden Dome | 15.0 | 0.0 | 0.0 | — |

> Projects are the summable leaves: the program element total is their sum, never added to it.

### Project 676602 — Space Based Interceptor

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.

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Space Data Network - Space Link | 0.0 | 0.0 | 1,392.0 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 671113 — Auxiliary Payloads

The Auxiliary Payloads project provides the additional communication relay space vehicles required to increase system access and capacity to the levels required to enable warfighters with the capability to rapidly move target data around the globe and execute long range kill chains. To ensure this system can transmit data to the secure cloud environment within operationally relevant timelines and enable persistent capability to directly downlink data to warfighters and weapon systems, capacity needs to be added to the network through the addition of more relay vehicles. The Department of the Air Force will leverage its existing relationship with the partnered agencies to rapidly acquire the necessary capability to meet warfighter needs. Activities may include, but are not limited to program office support, studies, technical analysis, experimentation, prototyping, and activities that may leverage commercial and international opportunities.

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Auxiliary Payloads | 235.2 | 0.0 | 0.0 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 676601 — Golden Dome

This BPAC was used for the stand-up the Office of Golden Dome for America (GDA), which served as the joint integration office responsible for overseeing strategic planning, program integration, cost estimating, contracting, financial management, internal reviews and audits, and program assessments. These functions are now held under new GDA Program Element(s).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Office of the Golden Dome for America | 15.0 | 0.0 | 0.0 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

## Where the FY2027 request goes

| Category | Share | $M |
|---|---|---|
| Government labs & warfare centers | 100% | 1,392.0 |

> R-3 exhibit contract funding, not USAspending obligations.

## Mission & acquisition strategy

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). The Long-Range Kill Chains PE contains activities for the Space Data Network-Space Link (SDN-SL) program. This program leverages the United States Space Force (USSF) multi-vendor Space Data Network - Backbone (SDN-B) program to enhance an integrated constellation to provide the communication layer for the Space Based Interceptors (SBI). This project is incorrectly labeled "Space Based Interceptor".

For FY27, and 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.

## Related program elements

- [0604874C — Improved Homeland Defense Interceptors](https://hitchintel.com/programs/0604874C) (Defense-Wide)
- [0603882C — Ballistic Missile Defense Midcourse Defense Segment](https://hitchintel.com/programs/0603882C) (Defense-Wide)
- [1203940SF — Space Situation Awareness Operations](https://hitchintel.com/programs/1203940SF) (Space Force)
- [1206423SF — Global Positioning System III - Operational Control Segment](https://hitchintel.com/programs/1206423SF) (Space Force)

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-3, PE 1203154SF (PB PB2027); FY2027 NDAA committee marks (as of 2026-07-27).
- **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.*