# Mobile User Objective System (MUOS) Baseline Upgrade

**R-2A activity** of project 673109 — SATCOM MUOS  
**Program element:** 1203109SF — Satcom MUOS  
**Component:** U.S. Space Force · **Budget Activity:** 7  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1203109SF/673109/a0  
**Parent:** https://hitchintel.com/programs/1203109SF

## Summary

This activity requests $20.6M in FY2027, 2.4% of project 673109, down 23% on FY2026. 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.** Complete baseline systems engineering, system optimization, cybersecurity updates, and EMI mitigation efforts to ensure capacity is available to the end user, including the development and fielding of EMI mitigation solutions and inclination control and eclipse contingency studies for the space segment. Complete baseline E2E MUOS usability enhancements including terminal certification, integration, and test. Complete development of alternative IBS solution to mitigate Legacy UHF communications shortfalls and integration and interoperability efforts with other DoW and commercial systems and prepare for fielding.

**FY2026 to FY2027 change.** FY 2027 decreased as ground segment updates will be replaced and modernized under the MUOS Service Life Extension activity.

## Before the request year

**FY2026 plans — current year.** Continue systems engineering, system optimization, cybersecurity updates, and electromagnetic interference (EMI) mitigation efforts to ensure capacity is available to the end user, including the development and fielding of EMI mitigation solutions and inclination control and eclipse contingency studies for the space segment. Continue E2E MUOS usability enhancements including terminal certification, integration, and test. Continue development of alternative IBS solution to mitigate Legacy UHF communications shortfalls and integration and interoperability efforts with other DoW and commercial systems. Field Digital Earth Terminal Interface (D-ETI) at remaining RAFs.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 21.7 |
| FY2026 | Enacted | 26.7 |
| FY2027 | Request | 20.6 |

> 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.

## Other activities in project 673109

- [Mobile User Objective System (MUOS) Service Life Extension (SLE)](https://hitchintel.com/programs/1203109SF/673109/a1) — FY2027 835.3

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibit R-2A, PE 1203109SF project 673109 (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.*