WASHINGTON, — April 28, 2026 : The United States Space Force is advancing development of a space-based Air Moving Target Indicator (AMTI) capability built around a layered architecture combining high-band and low-band radar systems, according to U.S. defense budget documents and program disclosures.
The initiative forms part of a broader effort by the Department of Defense to transition airborne surveillance and tracking missions from crewed aircraft to orbital platforms, with fiscal year 2027 funding proposals outlining both technical and industrial expansion plans.
Layered Dual-Band Radar Architecture
At the core of the Space-Based AMTI concept is a dual-band radar approach designed to provide persistent, global detection and tracking of airborne targets from orbit.
Low-band radar systems are being developed to deliver wide-area search capabilities, enabling continuous monitoring across large geographic regions and initial detection of airborne objects over extended ranges. High-band radar systems, operating in parallel, are intended to provide higher-resolution tracking and generate target-quality data necessary for engagement and integration into operational decision-making systems.
By combining the two, the Space Force aims to establish a layered sensing framework capable of tracking advanced threats, including low-observable aircraft and cruise missiles, within a single integrated architecture.
The service has described the overall construct as a “system-of-systems,” integrating space-based sensors, artificial intelligence-enabled ground processing, and secure communications networks.
Budget Allocation and Industrial Scaling
The Department of Defense’s fiscal year 2027 mandatory spending request includes $140 million specifically allocated for the Space-Based AMTI low-band radar development effort. The funding is designated to mature system designs and expand manufacturing capacity, particularly by onboarding additional vendors to support production.
This allocation complements a broader procurement request of approximately $7.056 billion for Space-Based AMTI Global Coverage. The larger funding line is intended to scale the high-band radar component, address regional operational requirements, and progress toward full global coverage for joint force applications.
Additional research, development, test, and evaluation funding is included under the Space-Based Moving Target Indicator program line.
In April 2026, the Space Force awarded a baseline indefinite-delivery, indefinite-quantity contract to nine aerospace firms, enabling competition for the first operational increment of the satellite constellation. The multi-vendor strategy is designed to strengthen the industrial base and achieve economies of scale as production ramps up.
Transition from Airborne Warning Platforms
The Space-Based AMTI architecture is expected to eventually replace the airborne AMTI mission currently performed by the United States Air Force using platforms such as the E-3 Sentry and the planned Boeing E-7 Wedgetail.
The E-3 Sentry fleet has provided airborne early warning and control capabilities for decades, while the E-7 Wedgetail had been intended as its successor. However, defense planners increasingly assess that crewed aircraft operating within range of modern air defense systems face growing survivability challenges.
Space-based systems are expected to offer persistent coverage, reduced vulnerability in contested environments, and the ability to operate globally without reliance on forward basing or airborne patrol cycles.
Prototyping and Integration Efforts
Prototype AMTI sensors have already been deployed on orbit through collaboration between the Space Force and the National Reconnaissance Office. These early demonstrations have supported validation of sensor performance, tracking accuracy, and data transmission requirements.
The program is now transitioning from prototyping toward procurement, with a focus on ensuring that space-based sensors can deliver low-latency, high-quality tracking data compatible with existing command-and-control networks.
The Space-Based AMTI effort is being developed alongside ground moving target indication capabilities, also coordinated with the National Reconnaissance Office, as part of a broader moving target indication mission area.
Program Scope and Remaining Unknowns
Despite continued funding and contract activity, key operational details remain undisclosed. The Space Force and Air Force have not released timelines for achieving initial or global operational capability, nor have they specified the planned size of the satellite constellation, orbital configurations, or integration schedules.
Officials have indicated that system requirements are structured to support scalability, allowing incremental deployment and adaptation as technologies mature and operational needs evolve.
Strategic Context
The Space-Based AMTI program aligns with the 2026 U.S. national defense strategy, which emphasizes operational flexibility and the ability to conduct missions in contested environments. By shifting airborne tracking functions to orbital assets, the Department of Defense aims to mitigate vulnerabilities associated with traditional platforms and enhance situational awareness across joint force operations.
The capability is intended to support continuous detection and tracking of airborne threats, including aircraft and other fast-moving objects, providing a persistent surveillance layer to complement existing defense systems.
Further program details, including vendor selections for the first operational increment and integration with other space-based sensing architectures, are expected following finalization of fiscal year 2027 funding and subsequent contract awards.
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