RDT&E Program Element · President's Budget PB2027

Airborne SIGINT Enterprise

PE 0304260F·U.S. Air Force·Approp. 3600 — RDT&E·BA7 — Operational System Development
FY2027 Request
$98.3M
Air Force · RDT&E
HitchAI read

U.S. Air Force requests $98.3M in FY2027 (down from a FY2026 peak). In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators funded it in full. L3Harris leads the industry work.

FY2027 Request
$98.3M
▼ 0.3% vs FY2026
FY2026 Enacted
$98.7M
▲ 6.7% vs FY2025
FY2025 Actual
$92.5M
Prior year

Roll-up of 4 projects. Projects are the summable leaves — the PE total is their sum, never added to it.

For fiscal year 2027, the U.S. Air Force is requesting $98.3M for Airborne SIGINT Enterprise under RDT&E program element 0304260F, down 0.3% 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.

255075100092.5FY25ACTUAL98.7FY26ENACTED98.3FY27REQUEST88.1FY2865.8FY2970.2FY3060.7FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual92.5
FY2026Enacted98.7
FY2027Request98.3
FY2028Outyear88.1
FY2029Outyear65.8
FY2030Outyear70.2
FY2031Outyear60.7
Where it sits

Acquisition lifecycle

This program is funded in RDT&E Budget Activity 7 — Operational System Development.

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

4 projects roll up into PE 0304260F

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 0% overall, which can hide much larger swings below.

The whole program

RC-135 is funded on 3 lines across 2 appropriations

This page shows $28.6M of RC-135, 9.6% of the program's $298.6M FY2027 request. The rest is appropriated elsewhere.

Also funded hereTypeComponentFY2027 $M
RC-135ProcurementAir Force252.8
RC-135 SystemsRDT&EAir Force17.1
RC-135 totalAir Force298.6

Lines whose title names the program. 6 further lines only mention RC-135 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
$98.3M
House NDAA (HASC)HASC
$98.3M full · +$0
Senate NDAA (SASC)SASC
$98.3M full · +$0
House Approps (HAC-D)HAC_D
$98.3M full · +$0
unresolved as of 2026-07-27. These are FY2027 authorization marks (NDAA); appropriations and the conference agreement may differ.
Who's building it

Where the FY2027 request goes

Performers named in the R-3 exhibit, resolved into industry, government-lab, and unspecified shares. Budget-justification contract funding, not obligations.

L3Harris
$45.7M · 47%
RC-135 SIGINT Development · Various
BAE Systems
$14.0M · 14%
CI-6 Sensor SW Development/Support (Phoenix OA) · CPFF
Where FY2027 funding flowsShare$M
Industry primes61%59.7
Government labs & warfare centers16%15.4
Other / unspecified24%23.2
FY2027 request100%98.3
See L3Harris's full federal contract ledger members
Program detail

Mission & acquisition strategy

The Common Development project supports airborne SIGINT design studies, engineering analysis, non-recurring engineering (NRE), program management, risk reduction, and other efforts to field SIGINT sensors and their associated air and ground components. The Common Development project also supports the development and integration of new sensor capabilities, quick reaction capabilities, and capabilities to address emerging needs as identified by the SIGINT Capabilities Working Group (SCWG). Finally, the Common Development project supports replacement components affected by Diminishing Manufacturing Sources and Material Shortages (DMSMS).

Air Force Life Cycle Management Center/Intelligence, Surveillance, and Reconnaissance and Special Operations Forces Directorate (AFLCMC/WI) will execute COMPASS BRIGHT efforts through technology maturation contracts. COMPASS BRIGHT leverages existing relationships with mission partners to mature SIGINT and MASINT technology for ASE. On an annual basis, the SIGINT Capabilities Working Group (SCWG) reviews developmental technologies against warfighter capabilities and requirements based on strategic roadmaps. SIGINT and MASINT proposals are evaluated and prioritized into a recommended list for senior executive direction to implement for the coming fiscal year.

Project 675183, 675180, 675185, 675186 — Common Development (Airborne SIGINT Development - Common Development)
  • Product Development
  • Management Services
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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
How does the FY2027 request compare with FY2026, and what does the five-year plan show?What did the FY2027 NDAA committees do to this request?Which project inside PE 0304260F is growing fastest, and which is shrinking?How is the FY2027 request split between industry and government performers?

This page carries the budget justification and the NDAA marks — nothing else. For what L3Harris 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 Air Force RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0304260F (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Airborne SIGINT Enterprise (PE 0304260F)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0304260F
Machine access
Markdown twin /programs/0304260F.md · MCP mcp.hitchintel.combudget_get_program_element, budget_get_cong_marks
FY2027 Request
$55.0M
▲ 81% vs FY2026
FY2026 Enacted
$30.3M
▼ 0.6% vs FY2025
FY2025 Actual
$30.5M
Prior year

Common Development (Airborne SIGINT Development - Common Development) — one RDT&E project inside PE 0304260F. Congressional marks are recorded on the program element, not on a project.

Project 675183 — Common Development (Airborne SIGINT Development - Common Development) — requests $55.0M in FY2027, 56% of the $98.3M requested for program element 0304260F. Year over year it grows 81% against FY2026.

Funding trajectory

Project 675183 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.

2550030.5FY25ACTUAL30.3FY26ENACTED55.0FY27REQUEST49.3FY2826.9FY2929.9FY3019.3FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual30.5
FY2026Enacted30.3
FY2027Request55.0
FY2028Outyear49.3
FY2029Outyear26.9
FY2030Outyear29.9
FY2031Outyear19.3
Inside the project

2 accomplishments / planned programs

The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them. Opening lines only here — the full year-by-year narrative is on the project page.

FY2025 actual$30.5M
FY2026 enacted$30.3M
FY2027 request$37.9M

- Will continue to develop new signals capabilities and enhancements. Details are classified. - Will continue to enhance OATL infrastructure to support future SIGINT sensor development and testing. - Will pursue new capability development and risk reduction and necessary follow-on Phoenix OA support to CI-6/SP-5 Family of Systems…

Read the FY2027 plan →
RC-135 SIGINT DevelopmentNEW
FY2025 actual$0.0M
FY2026 enacted$0.0M
FY2027 request$17.1M

Reference RC-135 effort, project 675180 (RC-135).

Project 675183 — every activity in full →
Who's building it

Named performers on project 675183

Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.

L3Harris
$17.1M · 31%
BAE Systems
$14.0M · 25%
Project detail

What project 675183 buys

The Common Development project supports airborne SIGINT design studies, engineering analysis, non-recurring engineering (NRE), program management, risk reduction, and other efforts to field SIGINT sensors and their associated air and ground components. The Common Development project also supports the development and integration of new sensor capabilities, quick reaction capabilities, and capabilities to address emerging needs as identified by the SIGINT Capabilities Working Group (SCWG). Finally, the Common Development project supports replacement components affected by Diminishing Manufacturing Sources and Material Shortages (DMSMS). Future SIGINT sensors are being developed through the implementation of open architecture (OA) concepts that enable the rapid integration of new signals of interests. Future SIGINT sensor efforts will address needs identified in the ISR Planning and Programing Guidance (IP2G) in order to sustain SIGINT operations in a highly contested environment. The efforts include, but are not limited to, demonstrating the Phoenix OA software on a CI-6 family of systems sensor on a current USAF platform with USAF ground station integration (e.g. Distributed Common Ground System (DCGS)); conducting CI-6 family of systems sensor improvements through Phoenix OA software; expanding Phoenix OA software beyond the CI-6 family of systems; developing Low-Cost UAS Sensor Technology (LOCUST) for inclusion into small UAS; and furthering the development of CRESTONE to counter emerging threats. This project also addresses ACC Tier 1 and 2 exploitation needs by hosting signals of interest exploitation software on scalable SIGINT sensors to support rapid deployment on a variety of USAF platforms by developing NORTHSTAR. This project will develop RANGERS to further miniaturize the form-factor of tactical aircraft roll-on/roll-off collection systems. This project also supports overarching Airborne SIGINT Enterprise (ASE) common development to include, but not limited to SIGINT modeling and simulation efforts and technology development and risk reduction through the Air Force Research Lab managed Open Architecture Technology Lab (OATL). Capability improvements needed to exploit service identified signals of interest will be identified as priorities by the SCWG. This project provides the warfighter increased SIGINT combat capability via rapid acquisition.

R-3 lines of work
  • Product Development
  • Management Services
FY2027 Request
$28.6M
▼ 32% vs FY2026
FY2026 Enacted
$41.9M
▼ 0.1% vs FY2025
FY2025 Actual
$41.9M
Prior year

RC-135 (Airborne SIGINT Development - RC-135 Rivet Joint) — one RDT&E project inside PE 0304260F. Congressional marks are recorded on the program element, not on a project.

Project 675180 — RC-135 (Airborne SIGINT Development - RC-135 Rivet Joint) — requests $28.6M in FY2027, 29% of the $98.3M requested for program element 0304260F. Year over year it falls 32% against FY2026.

Funding trajectory

Project 675180 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.

25041.9FY25ACTUAL41.9FY26ENACTED28.6FY27REQUEST30.6FY2831.6FY2932.5FY3033.4FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual41.9
FY2026Enacted41.9
FY2027Request28.6
FY2028Outyear30.6
FY2029Outyear31.6
FY2030Outyear32.5
FY2031Outyear33.4
Inside the project

1 accomplishment / planned program

The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them. Opening lines only here — the full year-by-year narrative is on the project page.

FY2025 actual$41.9M
FY2026 enacted$41.9M
FY2027 request$28.6M

- Will Deliver 9/3 capabilities for Baseline 15/16, continue 4 efforts for Baseline 16 and begin 4 new efforts for baseline 16. -Will continue SIGINT development efforts for the RC-135 fleet to include new signal sets and upgrades to current capabilities. See PE 0305207F for classified details. Classified requirements POC is HAF AF/A2OO…

Read the FY2027 plan →
Project 675180 — every activity in full →
Who's building it

Named performers on project 675180

Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.

L3Harris
$28.6M · 100%
Project detail

What project 675180 buys

This project supports design, engineering analysis, non-recurring engineering, development, test, and integration of RC-135 SIGINT sensor capabilities and their associated air and ground components. By extensively utilizing commercial-off-the-shelf (COTS) based solutions to field needed capabilities, this project must continuously identify suitable replacements for components affected by Diminishing Manufacturing Sources and integrate with the COTS technology cycle. These efforts provide required engineering for preliminary assessments of technical feasibility, operability, or military utility as well as specific engineering implementations integrated into the various baseline modifications. Funding also supports innovation activities to include studies, analyses, requirements definition, and quick-reaction capability prototypes/demonstrations to accelerate planning for technology transition, technology insertion and future acquisition programs. These funds will be disbursed among the RC-135V/W RIVET JOINT, the RC-135U COMBAT SENT, and the RC-135S COBRA BALL programs. Funding reflects the SIGINT Capabilities Working Group (SCWG) priorities and the accomplishment of other Airborne SIGINT Enterprise initiatives.

R-3 lines of work
  • Product Development
FY2027 Request
$8.9M
▼ 10% vs FY2026
FY2026 Enacted
$9.9M
▲ 2.2% vs FY2025
FY2025 Actual
$9.7M
Prior year

COMPASS BRIGHT — one RDT&E project inside PE 0304260F. Congressional marks are recorded on the program element, not on a project.

Project 675185 — COMPASS BRIGHT — requests $8.9M in FY2027, 9.1% of the $98.3M requested for program element 0304260F. Year over year it falls 10% against FY2026.

Funding trajectory

Project 675185 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.

09.7FY25ACTUAL9.9FY26ENACTED8.9FY27REQUEST2.1FY281.0FY291.4FY301.4FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual9.7
FY2026Enacted9.9
FY2027Request8.9
FY2028Outyear2.1
FY2029Outyear1.0
FY2030Outyear1.4
FY2031Outyear1.4
Inside the project

2 accomplishments / planned programs

The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them.

COMPASS BRIGHT Tech Development▼ 39%
FY2025 actual$9.7M
FY2026 enacted$9.9M
FY2027 request$6.0M

FY2027 planned work - Will continue to complete COMPASS BRIGHT ongoing projects based on established schedules. - Will continue to develop new signal capabilities and enhancements. - Will continue to fund low TRL capabilities that address emerging needs as identified by the SCWG.

FY2026 to FY2027 change Funding decreased due to higher Air Force Priorities.

FY2026 plans — current year - Continue or complete COMPASS BRIGHT awarded and ongoing projects based on established schedules. - Continue to solicit projects addressing collection of high priority signals of interest. - Continue to develop new signal capabilities and enhancements. - Continue to fund low TRL capabilities that address emerging warfighter needs as identified by the SCWG.

SIGINT DevelopmentNEW
FY2025 actual$0.0M
FY2026 enacted$0.0M
FY2027 request$2.9M

FY2027 planned work Reference SIGINT Development, project 675186 (Special Programs).

FY2026 to FY2027 change Funding increased due to a database error. Reference SIGINT Development, project 675186 (Special Programs). Once corrected, N/A.

Project detail

What project 675185 buys

The COMPASS BRIGHT project develops Signals Intelligence (SIGINT) and Radio Frequency Measurement and Signature Intelligence (MASINT) capabilities for transition to Department ISR systems. COMPASS BIGHT pursues SIGINT technologies for project transition, to include Communications Intelligence (COMINT), Electronic Intelligence (ELINT), Audio, Analytics, and Special Signals of Interest. COMPASS BRIGHT will pursue multi-INT cross-cue and fusion capabilities from other disciplines such as Geospatial Intelligence (GEOINT) in order to create a holistic ISR picture for the warfighter and the Intelligence Community (IC). COMPASS BRIGHT projects are selected through an annual data call process whereby the SIGINT Capabilities Working Group (SCWG) evaluates proposals from the laboratories, systems, and classified mission partners. The program office authority extends to accomplishment of out-of-cycle COMPASS BRIGHT efforts. These tasks may be filtered through the SCWG outside the normal vetting process to expedite acquisition of capabilities for the warfighter.

R-3 lines of work
  • Product Development
  • Management Services
FY2027 Request
$5.8M
▼ 65% vs FY2026
FY2026 Enacted
$16.5M
▲ 60% vs FY2025
FY2025 Actual
$10.3M
Prior year

Special Programs (Airborne SIGINT Development - Special Platforms) — one RDT&E project inside PE 0304260F. Congressional marks are recorded on the program element, not on a project.

Project 675186 — Special Programs (Airborne SIGINT Development - Special Platforms) — requests $5.8M in FY2027, 5.9% of the $98.3M requested for program element 0304260F. Year over year it falls 65% against FY2026.

Funding trajectory

Project 675186 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.

010.3FY25ACTUAL16.5FY26ENACTED5.8FY27REQUEST6.1FY286.3FY296.4FY306.6FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual10.3
FY2026Enacted16.5
FY2027Request5.8
FY2028Outyear6.1
FY2029Outyear6.3
FY2030Outyear6.4
FY2031Outyear6.6
Inside the project

1 accomplishment / planned program

The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them. Opening lines only here — the full year-by-year narrative is on the project page.

SIGINT Development▼ 32%
FY2025 actual$10.3M
FY2026 enacted$8.5M
FY2027 request$5.8M

- Will continue to modernize SIGINT systems used by the MQ-9A and other platforms. Additional details are classified.

Project 675186 — every activity in full →
Project detail

What project 675186 buys

This project supports special SIGINT studies as well as the development and integration of advanced SIGINT capabilities for special programs including, but not limited to: quick reaction capability sensors, processing, exploitation, and dissemination associated with these systems, and other efforts approved by the USAF SIGINT Capabilities Working Group (SCWG). Development efforts will include, but are not limited to: new signal sets, antenna improvements, sensitivity upgrades, data distribution upgrades, and new/advanced deployment capabilities. This project provides the warfighter near term combat capabilities with increased capability improvements, accomplished as technologies and risks achieve satisfactory levels. Sensors will be integrated and tested on various platforms including the MQ-9A Unmanned Aerial System.

R-3 lines of work
  • Product Development
  • Test and Evaluation