The ASTRIX 120 from Airbus is a Fibre Optic Inertial Measurement Unit (IMU) that is suited for operations in LEO, MEO, and GEO orbits and has been part of the Astrix 120 on Planck and Sentinel1 (ESA) satellite missions. It has a measurement range of up to ± 140 deg/sec and bias stability of less than 0.01 deg/h (3s). This IMU has scale factor stability of less than 200 ppm over 5 years and an ARW of less than 0.0016 deg/vh. It has four independent angular rate detection axes in a skewed configuration (ICU) and comes with stimulation capability for the AOCS ground test. This IMU has a mass of 6.5 Kg and supports a 1553B, and RS-422 digital interface. It requires a DC supply of 22-50 V and has a power consumption of 6 W per ON channel. This IMU measures 270 x 150 x 145 mm (GEU) and is ideal for observation, science, and telecom satellites.