Over the last decades the number of satellites in orbit has been constantly growing and the spacecraft payload complexity and demand continuously increased. Today, satellites provide close to full Earth coverage and produce a significant amount of data that needs to be downlinked to Earth for processing. The downlink constraints combined with the constantly growing productivity of missions require faster data handling, processing and transfer. Present processing solutions show constraints regarding computational performance. Size and transfer speeds of on-board storage/mass memory limited downlink/transmission capabilities. Furthermore, existing toolchains are not able to support recent evolving technologies. S4Pro will design and implement enabling technology for high-end data products produced on-board spacecraft through the implementation of a power efficient high performance space processing chain designed for low-Earth orbit (LEO) missions with a focus on Earth observation and satellite communication s