Robust filtering for very high accuracy attitude determination

In this paper the problem of line-of-sight sensing using a highbandwidth Angular Rate Sensor (ARS), together with attitude sensors like a star tracker and a gyroscope is considered. Based on a parametric identified model for the dynamics of the ARS, a fully integrated solution to the three-Axis attitude and rate determination problem has been developed, both for on-line and off-line robust filtering. The performance of the developed algorithms has been assessed in a simulation study, based on test cases representative of a desired filter bandwidth up to 1 kHz.