Stellar sensor assistant fiber optic gyroscope drift extraction

The fiber-optic gyroscope is used widely utilized as an important component of spacecraft inertial navigation system. Although it has several good characteristics over conventional gyroscope techniques, there is still some drift. To obtain high performance and diagnose faults in fiber-optic gyroscopes, error and drift must be found. Although many approaches have been proposed to filter drift in attitude determination, the solutions are in adequate. The stellar sensor has no integration drift making it very suitable for finding drift in fiber-optic gyroscopes. We proposed a novel fiber-optic gyroscope drift extraction algorithm using the stellar sensor to generate the vehicle reference rotation rate. Simulations of the algorithm are described an verify the proposed algorithm.