RDT&E Program Element · President's Budget PB2027

Multi-Domain Sensing System (MDSS) Adv Dev

PE 0604036A·U.S. Army·Approp. 2040 — RDT&E·BA4 — Advanced Component Development & Prototypes
FY2027 Request
$99.5M
◆ Development crest → decline
HitchAI read

U.S. Army funding falls 60% to a $99.5M request in FY2027 (down from a FY2026 peak), before stepping down 99% across the five-year plan. In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators added 20% (to $119.5M).

FY2027 Request
$99.5M
▼ 60% vs FY2026
FY2026 Enacted
$249.2M
▲ 32% vs FY2025
FY2025 Actual
$188.2M
Prior year

For fiscal year 2027, the U.S. Army is requesting $99.5M for Multi-Domain Sensing System (MDSS) Adv Dev under RDT&E program element 0604036A, down 60% from FY2026.

Funding trajectory

Funding profile, 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.

501001502002500188.2FY25ACTUAL249.2FY26ENACTED99.5FY27REQUEST39.8FY281.0FY291.0FY301.0FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual188.2
FY2026Enacted249.2
FY2027Request99.5
FY2028Outyear39.8
FY2029Outyear1.0
FY2030Outyear1.0
FY2031Outyear1.0
Where it sits

Acquisition lifecycle

This program is funded in RDT&E Budget Activity 4 — Advanced Component Development & Prototypes.

Complete
Research
BA 1–2
Complete
Advanced Technology
BA 3
Current
Prototyping
BA 4
Later
Development & Fielding
BA 5–7
Inside the program element

1 project rolls up into PE 0604036A

Projects are the summable leaves — the PE total is their sum, never added to it. Program elements and projects carry the full five-year plan; activities stop at the budget year. This PE moves -60% overall, which can hide much larger swings below.

Project DD6

HADES Platform, Payloads/PED, and Integration

$99.5MFY2027 request ▼ 60%
FY2025 actual$188.2M
FY2026 enacted$249.2M
FY2027 request$99.5M

PE 0604036A / Project DD6 is the Army's first priority in the MDSS portfolio of systems and is the centerpiece of the A-ISR transformation strategy. HADES is a commercial jet modified for military use with complex OML aerodynamic modifications and integrated with sensors which provide COMINT, ELINT, and SAR/MTI (i.e. RADAR) capabilities, ASE, and other military mission equipment utilizing open system standards. HADES allows the Army to fly higher, faster, and farther, which directly impacts the warfighter's ability to see and sense deeper, delivering an organic capability in line with the Army's operational imperative for deep sensing. In FY 2027 Prototype #2 and #3 aircraft are concurrently being developed as prototype #1 will deliver in FY 2026. These three developmental prototypes will inform future Army procurement decisions. HADES provides advanced aerial intelligence sensing capabilities for Multidomain Operations (MDO) against peer and near-peer adversaries, addressing Army deep sensing needs in all phases of operations and throughout the depth of the future battlefield. With higher airspeed, range and endurance, HADES will facilitate A-ISR coverage for a much larger geographical area than current capability and will facilitate global deployment within days instead of the current transitional period of several weeks for legacy aircraft. This will adversely affect our adversaries' ability to plan and maneuver. This is also aligned with the Headquarters Department of the Army Deputy Chief of Staff (HQDA DCS) G2 strategy that lethality begins with intelligence. HADES provides highly mobile, long endurance converged deep sensing through the collection of COMINT, ELINT, and SAR/MTI data. Subsequent increment upgrades can host Electronic Warfare (EW), Radio Frequency (RF)-enabled Cyber, and Launched Effects (LE) as well as additional system improvements. Aircraft performance and a Modular Open Systems Approach (MOSA) increases flexibility in rapid global deployment and postures to meet emerging operational needs. The total cost of the HADES Middle Tier of Acquisition (MTA) Rapid Prototyping (RP) # 1 effort is $473.5 million RDT&E from FY 2024 to FY 2027. Details provided under separate cover.

The whole program

HADES is funded on 2 lines across 2 appropriations

This page shows $99.5M of HADES, 30% of the program's $327.0M FY2027 request. The rest is appropriated elsewhere.

Also funded hereTypeComponentFY2027 $M
HADES PLATFORM, PAYLOADS/PED, AND INTEGRATIONProcurementArmy227.6
HADES totalArmy327.0

Lines whose title names the program. 4 further lines only mention HADES in their justification text — those fund something else and are deliberately excluded from the total.

Congressional action

Congressional marks

Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.

RequestPresident's Budget
$99.5M
House NDAA (HASC)HASC
$99.5M full · +$0
Senate NDAA (SASC)SASC
$99.5M full · +$0
House Approps (HAC-D)HAC_D
$119.5M +$20.0M · +20%
▲ $20.0M chamber gap — unresolved as of 2026-07-27. These are FY2027 authorization marks (NDAA); appropriations and the conference agreement may differ.
Program detail

Mission & acquisition strategy

PE 0604036A / Project DD6 is the Army's first priority in the Multi Domain Sensing System (MDSS) portfolio of systems and is the centerpiece of the Army's Aerial Intelligence, Surveillance, and Reconnaissance (A-ISR) transformation strategy. High Accuracy Detection and Exploitation System (HADES) is a commercial jet modified for military use with complex Outer Mold Line (OML) aerodynamic modifications and integrated with sensors which provide Communications Intelligence (COMINT), Electronics Intelligence (ELINT), and Synthetic Aperture Radar/Moving Target Indicator (SAR/MTI) (i.e.

Project DD6 — HADES Platform, Payloads/PED, and Integration
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Answers are generated from the figures on this page — the FY2027 justification exhibits and the marks tracked above — and nothing else is consulted. Confirm any figure against the cited exhibit before you use it externally.

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Questions this page can answer
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This page carries the budget justification and the NDAA marks — nothing else. For what a contractor has actually been obligated, the ledger is at hitchintel.com/vendors; for live solicitations, hitchintel.com/opportunities. Both are member surfaces.

Provenance

Cite this page

Sources
FY2027 Department of the Army RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0604036A (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Multi-Domain Sensing System (MDSS) Adv Dev (PE 0604036A)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0604036A
Machine access
Markdown twin /programs/0604036A.md · MCP mcp.hitchintel.combudget_get_program_element, budget_get_cong_marks