Satellite attitude data fusion system and method thereof

A satellite attitude data fusion system, applicable to the earth satellite environment to estimate attitude data of the satellite, comprising:

• a first EKF of a GS IAE;
• a second EKF of the GS IAE;
• a sensor;
• a first gyro of a MEMS, wherein the first gyro of the MEMS is connected to the first EKF of the GS IAE;
• a second gyro of a MEMS, wherein the second gyro of the MEMS is connected to the second EKF of the GS IAE;
• and
• an attitude data fusion algorithm module,
• wherein an attitude data fusion algorithm module, wherein the first gyro and the second gyro of the MEMS are connected to the attitude data fusion algorithm module, respectively,
• wherein the first gyro and the second gyro of the MEMS are connected to the sensor, respectively,
• wherein the first gyro of the MEMS performs a misalignment correction process and output first body rates data,
• wherein the second gyro of the MEMS performs a misalignment correction process and output second body rates data,
• wherein, the first EKF, the second EKF, the sensor, the first gyro, and the second gyro are used to perform a body rates quaternion attitude data processing operation based on the first body rates data, the second body rates data, and the quaternion attitude data to obtain first IAE result data and second IAE result data, and the attitude data fusion algorithm module performs an attitude/rates data fusion algorithm in a subsystem level to evaluate an attitude estimation IAE performance based on the first IAE result data, and the second IAE result data, and
• wherein a first EKF of a GS IAE performs an first algorithm based on the first body rates data and the quaternion attitude data to obtain the first IAE result data, and a second EKF of the GS IAE performs an second algorithm based on the second body rates data and the quaternion attitude data to obtain the second IAE result data.