# Product Development

**R-2A activity** of project E10 — Sentinel  
**Program element:** 0604820A — Radar Development  
**Component:** U.S. Army · **Budget Activity:** 5  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604820A/E10/a0  
**Parent:** https://hitchintel.com/programs/0604820A/E10

## Summary

This activity requests $12.1M in FY2027, 36% of project E10, up 34% on FY2026. The R-2A exhibit describes it across FY2025–FY2027, including what the FY2027 money is planned to buy.

## What the FY2027 request buys

**FY2027 planned work.** Sentinel A4: Continuously integrate and deliver software enhancements to Sentinel A4 to combat evolving threat based on phase two of IOT&E findings. The program will develop and implement new signal processing techniques and waveforms to enhance Electronic Attack and Electronic Protect techniques based on the evolving threat, further enhancing radar survival and effectiveness in contested environments. The program will continue to develop software following the combined practices of Continuous Integration/Continuous Delivery (CI/CD). Sentinel A3: Funding will support continuous software development for emerging and evolving threats. The program will continue technical assessments, as well as threat and performance analysis for Sentinel A3.

**FY2026 to FY2027 change.** Increase in FY 2027 supports the Continuous Improvement/Continuous Development of software to address evolving threats for Sentinel A3 and A4.

## Before the request year

**FY2026 plans — current year.** FY 2026 funds will support but is not limited to: Sentinel A4: Will continuously integrate and deliver software enhancements to Sentinel A4 to combat the evolving threat based on phase one of IOT&E findings. The program will continue to develop software following the combined practices of Continuous Integration/Continuous Delivery (CI/CD). Sentinel A3: Funding will support continuous software development for emerging and evolving threats. The program will continue technical assessments, as well as threat and performance analysis for Sentinel A3.

**FY2025 accomplishments.** Sentinel A4: Will continuously integrate and deliver software enhancements to Sentinel A4 to combat the evolving threat based on developmental testing and any initial IOT&E findings. Sentinel A3: Will continue to perform technical assessments, concept studies, cost reduction, risk reduction, threat analysis, and required documentation.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 13.1 |
| FY2026 | Enacted | 9.0 |
| FY2027 | Request | 12.1 |

> 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 E10

- [Test & Evaluation](https://hitchintel.com/programs/0604820A/E10/a1) — FY2027 11.1
- [Electronic Attack/Electronic Protect](https://hitchintel.com/programs/0604820A/E10/a2) — FY2027 10.0

## Source & machine access

- **Source:** FY2027 Department of the Army RDT&E Budget Justification, Exhibit R-2A, PE 0604820A project E10 (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.*