POLARISis an ITAR-free, Single Event Latch-up tolerant and high-performance Inertial Measurement Unit (IMU). It provides to user equipment on a digital RS422 interface, velocity increments and angle increments about three orthogonal measurement axes. Developed with the support of the European Space Agency (ESA), POLARIS is designed for short to medium-term space missions, including launchers, micro-launchers, landers and re-entry vehicles for which the driving issue is robustness to SEE, reliability and meeting performance at a reduced cost and size.