ARIETIS is an innovative 3-Axis Rad-Hard Gyro unit and the only gyroscope system using a European Field-Programmable Gate Array (FPGA) technology. With its High-Reliability class 1 components, ARIETIS is a high-performance, high-reliability, ITAR-free non-redundant 3-axis Gyros Unit, providing inertial angle increments measurement and rotations rates about three orthogonal axes. ARIETIS is developed and qualified as per ESA standard (ECSS) and is also designed to have a long life duration (15+ years).