STP-5 (SIRI-3 & PUMA)

Strontium Iodide Radiation Instrument (SIRI)-3 will take knowledge gained from the previous missions to develop a large prototype instrument for europium-doped strontium iodide gamma ray detection technology.

The Propulsion Unit with Modular Applications (PUMA) is a demonstration of the Air Force Research Laboratory's modular spacecraft propulsion technology that enables dynamic space operations across the full space ecosystem. Modular propulsion technology eliminates integration constraints by establishing standard interfaces and model-based systems engineering for rapid space vehicle and launch vehicle integration, on-orbit refueling, and propulsion system upgrades.