The sensor will be integrated into the Next-Generation Overhead Persistent Infrared (Next-Gen OPIR) Geosynchronous Earth Orbit (GEO) Block 0 satellite program commonly known as NGG, a cornerstone capability designed to detect and track increasingly sophisticated missile threats.
Operating from geosynchronous orbit roughly 36,000 kilometres above Earth, the NGG satellites will provide persistent, wide-area coverage over critical regions, particularly across mid-latitudes. This complements existing missile-warning constellations and emerging systems in low and medium Earth orbit, forming a more resilient, layered detection architecture.
Raytheon’s sensor payloads incorporate advanced optical systems and data-processing algorithms capable of detecting the infrared heat signatures generated by missile launches. Importantly, the system is designed to identify and track next-generation threats, including hypersonic glide vehicles, which are significantly harder to detect due to their speed, manoeuvrability and lower flight profiles compared to traditional ballistic missiles.
According to the company, the upgraded sensors deliver improved sensitivity and tracking accuracy, enabling earlier detection and more reliable cueing for downstream defence systems such as interceptors and command-and-control networks.
“Demand for resilient missile warning and tracking across all orbital regimes continues to accelerate,” said Jeff McCall, Raytheon’s vice president for mission solutions and payloads. “Programs like NGG show how persistent, high-altitude sensing can expand coverage and improve overall mission effectiveness.”
The NGG satellites themselves are being built by Lockheed Martin and are expected to play a central role in replacing and enhancing legacy systems such as the Space-Based Infrared System, which has underpinned US missile warning capabilities for more than a decade.
Beyond missile launch detection, the new generation of OPIR satellites is also expected to contribute to broader space domain awareness, including the monitoring of potential adversary activities in orbit, an increasingly contested domain as major powers expand their military space capabilities.
Raytheon has now completed sensor payloads for two NGG satellites, with the first already finished and prepared to support initial launch capability. Once operational, the system will form part of an integrated, multi-layered missile warning network designed to provide continuous global coverage and improved survivability against emerging counter-space threats.
The delivery underscores a broader shift towards more distributed and resilient space architectures, as the US and its allies respond to the rapid evolution of missile technology and the growing strategic importance of space in modern warfare.
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