R-2A Activity · President's Budget PB2027

Homeland Defense Over the Horizon Radar Development

Activity a0·Project 650011 — HLD - OTHR·PE 0102417F·U.S. Air Force
FY2027 Request
$77.9M
◆ Restart — nothing in FY2026
HitchAI read

This activity requests $77.9M in FY2027, 100% of project 650011 — a restart, funded in FY2025 and zeroed in FY2026. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

Restart

This activity was funded in FY2025 ($367.5M), zeroed in FY2026, and requests $77.9M again in FY2027. A restart has an incumbent and a new start does not; with a zero current year there is no percentage to quote, which is why it appears in no growth ranking.

FY2027 Request
$77.9M
No FY2026 funding
FY2026 Enacted
$0.0M
▼ 100% vs FY2025
FY2025 Actual
$367.5M
Prior year
Planned work

What the FY2027 request buys

Verbatim from the R-2A exhibit for project 650011 of PE 0102417F. This is the budget justification's own description of work that has not happened yet — the one thing no other level of the budget carries.

FY2027 planned work

- Utilize Winter Study results and ionospheric model to inform system design and algorithm development - Continue system design and supply chain market research - Develop training material and technical documentation for operators - Complete set of planned activities are held at a higher level

FY2026 to FY2027 change

The FY 2026 President's Budget submittal did not reflect the FY 2027 through FY 2030 funding. Therefore, an explanation of the changes between the two budget positions for FY 2027 cannot be made in a relevant manner.

Before the request year

FY2026: the year under way

Prior-year accomplishments and current-year plans from the same exhibit. Context for the FY2027 plan, not a series — an activity partitions its project exactly in the request year, but can under-cover it in earlier years.

FY2026 plans — current year

The following CY efforts are being executed using FY 2025 carryover funds and are also be communicated in the BA7 R-Doc: - Conducting wintertime experimentation study (install, checkout, operate) with DoD S&T community - Utilizing Winter Study results and ionospheric model development to inform predicted performance metrics - Continue ionospheric model development, and start tool improvements to improve system performance at northern latitudes - Start system design via GRA development while evaluating/researching supply chain market to meet intended system design - Complete planned integration activities in support of classified requirements

Money

Three years, and no five-year plan

An R-2A activity publishes the prior year, the current year and the budget year. The FYDP outyears exist at project and program-element level and are deliberately absent here rather than inferred. Estimate types are colored and never summed into one figure.

1002003000367.5FY25ACTUAL0.0FY26ENACTED77.9FY27REQUEST
Actual Enacted Request
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual367.5
FY2026Enacted0.0
FY2027Request77.9

This activity is 100% of project 650011's FY2027 request and 45% of PE 0102417F's. In the request year the activities under a project sum to it exactly; in the current year they under-cover it in about 9% of cases, so an activity's delta can legitimately exceed its parent's and the two must not be compared row to row.

Where this sits

1 activity in project 650011

Every R-2A line of this project, largest FY2027 request first. Linked where the activity has enough of its own narrative to carry a page; the rest are shown in full on the project page.

Homeland Defense Over the Horizon Radar Development — this activity$77.9M RESTART
Source
FY2027 Department of the Air Force RDT&E Budget Justification · Exhibit R-2A · PE 0102417F, project 650011 (President's Budget PB2027). Congressional marks are recorded on the program element, never on an activity.
Machine access
Markdown twin /programs/0102417F/650011/a0.md · MCP mcp.hitchintel.combudget_get_activity