Tracking Layer

TECHNICAL DEFINITION

A Tracking Layer constitutes a distributed, multi-domain sensor architecture, comprising assets such as ground-based radar, airborne infrared systems, and space-based electro-optical sensors, designed for persistent surveillance, detection, acquisition, and continuous kinematic state estimation of aerial or ballistic threats to enable real-time engagement and fire control solutions within integrated air and missile defense systems.

BACKGROUND

Starshield is a division of SpaceX's Starlink subsidiary creating purpose-built low-Earth-orbit (LEO) satellites designed to provide new military space capabilities to U.S. and allied governments. Starshield was adapted from the global communications network Starlink but brings additional capabilities such as target tracking, optical and radio reconnaissance, and early missile warning. Primary customers include the Space Development Agency (SDA), National Reconnaissance Office and the United States Space Force. As of 2025, at least 183 Starshield satellites have been launched, with the latest batch of 22 satellites being launched in April 2025 as part of NROL-145. The primary project SpaceX is reportedly vying for are contracts for the Golden Dome space weapons system.

SYNONYMS & ALIASES

• Sensor Layer
• Surveillance Layer
• Detection Layer
• Tracking Network
• Sensor Grid

USAGE NOTE

The tracking layer is fundamental to modern integrated air and missile defense (IAMD) systems, ensuring threats are continuously monitored for successful interception.

DEVELOPERS

Organizations developing technology related to Tracking Layer.

• Lockheed Martin

  A global aerospace, defense, security, and advanced technologies company heavily involved in developing and integrating sophisticated tracking layers for missile defense, space-based surveillance, and command and control systems for various military platforms.

• Northrop Grumman

  A leading global aerospace and defense technology company providing critical components and systems for military tracking layers, including advanced radars, satellite surveillance, and integrated C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance) solutions.

• RTX (formerly Raytheon Technologies)

  A major defense contractor known for its advanced sensor technologies, radar systems (e.g., AN/SPY-6), and missile defense systems that form the backbone of military tracking layers for air, missile, and space threats.

• L3Harris Technologies

  Provides advanced C4ISR solutions, space and airborne systems, and tactical communications that are integral to developing and implementing comprehensive tracking layers for intelligence, surveillance, and reconnaissance applications in defense.

• BAE Systems

  A multinational defense, security, and aerospace company that develops and supplies a wide range of electronic warfare systems, radar technologies, and C4ISR solutions essential for military tracking and situational awareness.

• Space Development Agency (SDA)

  A U.S. Department of Defense organization tasked with rapidly developing and fielding the National Defense Space Architecture (NDSA), which explicitly includes a 'Tracking Layer' of satellites designed for missile warning, missile tracking, and advanced missile defense.

• Airbus Defence and Space

  A European leader in space-based systems, military aircraft, and defense solutions, providing satellite communication, intelligence, surveillance, and reconnaissance (ISR) capabilities that contribute to the military tracking layer.

• SpaceX

  While primarily commercial, SpaceX's Starlink constellation is increasingly being used and developed for military applications, providing resilient high-bandwidth communication for sensor data relay, which supports and enhances military tracking layers for global situational awareness.