The iADCS400 from AAC Clyde Space is an Autonomous Attitude Determination and Control System (ADCS) that is designed for small satellites and 6U CubeSats. It consists of an ST200 star tracker, RW400 series reaction wheels, MTQ400 series magnetorquers, an optional external magnetometer, sun sensors, GNSS receivers, and precision gyroscopes. The ADCS system has a pointing accuracy of less than 1 deg with a slew rate of greater than 1.57 deg/sec. It has a total momentum storage per axis of +/- 1.5, +/- 3.0, and +/- 6.01 mN.m.s and a maximum torque of 2 mNm. The ADCS system requires a DC supply of 4.9-15 V and has a power consumption of 900 mW (idle) and 2000 mW (nominal). It supports I2C, RS-422, RS-485, UART, and CAN interfaces. The iADCS400 has an internal fire-and-forget controller, which frees up the host processor’s workload, providing nadir and target pointing modes, as well as backup de-tumbling, intentional spin modes and slewing for 6 to 12 U satellites or platforms with similar moments of inertia. It has a mass of 1.15-1.7 Kg and measures 95.4 x 95.9 x 67.3 mm.
