L3Harris to produce 16 US missile tracking satellites.

On December 20, 2023, L3Harris announced the completion of its Critical Design Review (CDR) and Production Readiness Review (PRR) for 16 missile tracking satellites designated for the US Space Development Agency’s (SDA) Tranche 1 Tracking Layer (T1TRK) program.
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Hypersonic missiles, such as the Russian Kh-47 Kinzhal, pose unique threats due to their characteristics, requiring the development of satellites capable of tracking hypersonic missiles in real time. (Picture source: L3Harris)

The completion of the CDR indicates that L3Harris' design aligns with the mission requirements, while the PRR signifies the SDA’s approval for the initiation of full-scale production. These achievements represent significant progress in the pursuit of the SDA's Proliferated Warfighter Space Architecture (PWSA), a network of military satellites in low-Earth orbit (LEO).

Hypersonic missiles, such as the Russian Kh-47 Kinzhal, pose unique threats due to their stealthy flight characteristics, diverse launch locations, and high maneuverability. Addressing these challenges and providing an effective deterrent necessitates the development of a resilient sensor platform, such as a satellite, capable of tracking hypersonic missiles in real time.

L3Harris' contribution to the Tranche 1 Tracking Layer (T1TRK) program revolves around the integration of infrared sensors and algorithms into the satellite. These technologies are critical for the detection, tracking, and integration of threat data. The data is subsequently relayed to military operators through a network utilizing both optical and RF communications. Moreover, ground control can command the satellites to adopt various pointing modes, enhancing their ability to monitor potential threats. The program encompasses not only satellite development but also ground support, operations, and long-term maintenance.

To meet stringent launch schedules, L3Harris initiated the fabrication of crucial sub-assemblies well in advance of the CDR. With the conclusion of both the CDR and PRR, the team has transitioned into the assembly and integration phase. Collaboration with over 20 major subcontractors and numerous suppliers plays an important role in ensuring the timely production of satellite components and ground systems.

Bob De Cort, Director of Program Management at L3Harris, is leading the team responsible for the design and development of the 16 missile-tracking satellites. These satellites, scheduled for launch in 2025, feature advanced technology engineered to counter hypersonic missiles, known for their exceptional speed and maneuverability.

De Cort underscores the close collaboration between L3Harris and the SDA, highlighting the SDA's innovative approach to defense contracting. Instead of traditional methods, the SDA employs a spiral development model that leverages commercial technologies, allowing for the deployment of satellite tranches every few years.

De Cort views the Tranche 1 Tracking Layer program as a crucial step toward achieving the SDA's vision for the Proliferated Warfighter Space Architecture. The program's origins can be traced back to Tranche 0, during which L3Harris developed four wide-field-of-view satellites for the SDA and one medium-field-of-view satellite for the Missile Defense Agency (MDA). These five satellites are prepared for hosting on an upcoming MDA launch.

De Cort emphasizes the significance of simultaneous launches of SDA and MDA satellites, which maximizes opportunities for military personnel to observe test articles from the same orbit. This approach contributes to better preparedness and defense capabilities. The objective is to build upon the experiences and lessons learned from Tranche 0, further investing in algorithms, software, cybersecurity solutions, facilities, and testing processes to enhance resilient capabilities and expedite satellite deployment for future tranches of the PWSA.