RDT&E Project · President's Budget PB2027

Hypersonic & Ballistic Tracking Space Sensor (HBTSS) Prototyping

FY2027 Request
$0.0M
▼ 100% vs FY2026
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Project MD42 — Hypersonic & Ballistic Tracking Space Sensor (HBTSS) Prototyping requests $0.0M in FY2027, 0.0% of the $95.8M requested for program element 1206895C, down 100% on FY2026. 1 R-2A activity decomposes the request.

MarketHypersonic Strike

Matched on this project's title. A title match, not a curated taxonomy — narrative-only matches are not shown at all rather than shown with a caveat nobody reads. No market size is quoted here: a market spans appropriations far beyond this program element.

FY2027 Request
$0.0M
▼ 100% vs FY2026
FY2026 Enacted
$31.7M
▼ 56% vs FY2025
FY2025 Actual
$72.3M
Prior year
Project detail

What project MD42 buys

HBTSS will demonstrate a resilient, flexible, and global capability to detect and track hypersonic missiles and detect and track ballistic missiles in the boost phase of flight. The fire-control quality tracking data will allow long range engagement of the threat while enhanced tracking accuracy through missile burn out will provide the Warfighting community increased capability in missile defense weapons systems engagement and higher accuracy impact predictions. The HBTSS prototype demonstration's priority is to maintain the pace of the development schedule given the urgent Warfighter need to address rapidly developing threats. To meet this priority, HBTSS must use high technology readiness level components, take advantage of existing government capabilities to minimize development, use a management culture that does not slow down the pace of development, and use the Other Transaction Authority (OTA) to minimize contracting cycle times. OTAs allow the government to work with traditional, non-traditional, and new space businesses to identify and implement innovative solutions. The HBTSS prototype demonstration seeks to demonstrate the ability to meet requirements derived from United States Strategic Command Prioritized Capabilities List, the National Defense Authorization Act for Fiscal Year 2019, and the Joint Requirements Oversight Council Capability Development Document for Missile Warning (MW)/Missile Defense (MD) Overhead Persistent Infrared (OPIR). The HBTSS developed target detection algorithms and evaluated them in a Signal-chain Processing Demonstration, providing insight into the constellation architecture, communications approach, and preliminary command and control design aspects. These results informed the development of the HBTSS prototype demonstration Space Vehicles (SVs) and demonstrated the ability to detect and track dim targets in a cluttered background along with the sensitivity necessary to support the hypersonic kill chain. Operationally, the HBTSS fire-control capability will be part of Space Development Agency's Proliferated Warfighter Space Architecture and will detect hypersonic, ballistic, and other advanced threats much sooner than terrestrial radars, providing hypersonic threat-tracking data for hand off through linked missile defense weapons.

R-3 lines of work
  • Product Development
  • Support
  • Management Services
Funding trajectory

Project MD42 funding, FY2025–FY2031

Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.

2550072.3FY25ACTUAL31.7FY26ENACTED0.0FY27REQUEST0.0FY280.0FY290.0FY300.0FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual72.3
FY2026Enacted31.7
FY2027Request0.0
FY2028Outyear0.0
FY2029Outyear0.0
FY2030Outyear0.0
FY2031Outyear0.0
Inside the project

1 accomplishment / planned program

The R-2A exhibit — the only level of the budget that describes work that has not happened yet. Activities carry the prior, current and budget year only, no five-year plan. Coverage is partial across the corpus, so count activities, never total them.

Hypersonic and Ballistic Tracking Space Sensor (HBTSS)▼ 100%
FY2025 actual$72.3M
FY2026 enacted$31.7M
FY2027 request$0.0M

FY2027 planned work No funding is requested in FY 2027.

FY2026 to FY2027 change Decrease from FY 2026 to FY 2027 reflects completing satellite disposition for HBTSS.

FY2026 plans — current year - Satellite disposition