Sun Sensor
Sun sensor detects the direction of the solar light.
Attitude Control Subsystem
Magnetorquer
Magnetorquer is the actuator to control the attitude satellites by magnetic force generated from coil.
Momentum Wheel
Momentum wheel is the actuator on satellites, which stabilize the attirude of satellites.
Reaction Wheel
Reaction wheel is the actuator to control the attitude of satellites, which changes its number of revolutions to change attitude.
Bias Momentum
Bias momentum is one of the type of attitude control methods. bias momentum uses momentum wheel and effect of gyro stabilization.
Kalman Filter
What is Kalman Filter? Kalman filter is a method to estimate true state from data including uncertainty. For example, the Kalman filter was used in the rocket of the Apollo program. All sensors have error in their measurement value, so we need to correct them to estimate the true state value. Kalman filter uses odometry