The SIRIUS OBC LEON3FT from AAC Clyde Space is a Small Satellite On-Board Computer (OBC). It has a mass of 130g with PSS, RS-485, UART, and SpaceWire Interfaces. The On-Board computer has a clock frequency of 50 Mhz with a power supply input voltage of 4.5 to 16V and nominal power consumption of 1.3 W. It can operate at temperatures ranging from -30 to 60 Degrees C and has a radiation of 20 Krad. The On-board computer measures 95.89 x 90.17 x 17.20 mm, with LEON3-FT SPARC V8 fault-tolerant soft processor, and its RTEMS real-time operating system (RTOS) is compliant with IEEE 1754 SPARCv8 standard. It is designed and qualified for five years in LEO.
