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 has a mass of 1.15-1.7 Kg. The ADCS system consists of an ST200 star tracker, RW400 series reaction wheels, MTQ400 series magnetorquers, an optional external magnetometer, sun sensors, GNSS receivers, and precision gyroscopes. It has a pointing accuracy of less than 1 deg with a slew rate of 1.57 deg/sec. The ADCS system 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. It requires a DC supply of 4.9-15 V and has a power consumption of 900 mW (idle) and 2000 mW (nominal). The iADCS400 supports I2C, RS-422, RS-485, UART, and CAN interfaces. It 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. This ADCS system measures 95.4 x 95.9 x 67.3 mm.
