Space Systems Prototype Transitions (SSPT)

The Space Systems Prototype Transitions (SSPT) program, managed by the Air Force, is designed to address and bridge space technology and capability gaps by transitioning military space prototypes into established programs. This initiative involves a comprehensive range of activities such as modeling, integration, testing, and on-orbit support for prototype technologies. The program's objectives include rapidly addressing identified technology gaps, accelerating system maturation for demonstrations or prototypes, and enhancing the reliability and survivability of the military space enterprise. Additionally, it aims to energize the U.S. space industrial base and facilitate the transition of Science and Technology (S&T) innovations into military space programs.

One of the key projects under SSPT is the Long Duration Propulsive Evolved Expendable Launch Vehicle (EELV) Secondary Payload Adapter (ESPA), known as LDPE, along with its successor, the Rapid On-Orbit Space Technology Evaluation Ring (ROOSTER). These projects provide low-cost, rapid, and flexible on-orbit capabilities to host and deploy various prototypes using excess payload margins on US Space Force launch missions. ROOSTER aims to enable rapid technology insertion into operational programs through on-orbit testing of prototypes and experimental payloads while maturing operational concepts like on-orbit refueling.

The SSPT program also includes initiatives like Tetra, which provides a training platform for developing tactics, techniques, and procedures for pathfinder mission sets. The Quasi-Zenith Satellite System—Hosted Payload (QZSS-HP) enhances Geostationary Earth Orbit capabilities over Eurasia in collaboration with Japan. Additionally, Space-to-Space Communications focuses on developing technologies to synchronize command and control across space systems. The program also supports CubeSat technology development to enhance small satellite capabilities in line with the Space Service Acquisition Executive's vision.

Assault Breaker II (ABII), another component of SSPT led by DARPA, is a classified effort aimed at analyzing and recommending counter-Anti-Access/Area Denial solutions to the Joint Requirements Oversight Council. This project involves warfighter analysis, experiments, and development of modeling tools to support warfighting objectives. The program is transitioning from DARPA to OSD (R&E) as it matures.

SSPT encompasses a diverse array of projects aimed at advancing U.S. military space capabilities through innovative research and development efforts.