The LN-200S from Northrop Grumman Corporation is a Fibre-Optic Gyro Inertial Measurement Unit (IMU) that is suited for operations in earth and heliocentric orbits with missions lasting up to six years and has been part of several successful missions such as deep space I, Kepler space telescope, and mars rover (Curiosity). It has a dynamic range of up to 1000 deg/sec and bias repeatability of 1 deg/h (1σ). It is This IMU has scale factor stability of 100 ppm and an ARW of less than 0.07 deg/√h. It consists of three solid-state fiber-optic gyros and three solid-state silicon micro-electro-mechanical systems accelerometers in a compact package that measures velocity and angle changes in a coordinate system. This IMU has a mass of 0.748 Kg and supports RS-422, and RS-485 serial data electrical interface protocols. It requires a DC supply of 15 V and has a nominal power consumption of up to 12 W. This IMU measures 88.9 x 85.1 mm.