Accuracy estimation of determining attitude of coordinate systems of the star sensor BOKZ-М by experimental data

Star sensors of the BOKZ family allow to find parameters that define the attitude of their own coordinate systems with respect to an inertial coordinate system by observing regions in the star sky. The accuracy of definition of attitude parameters is influenced by a great number of factors and we don’t estimate their individual contributions to the total error. On that reason, we analyze fluctuations of rather long series of definitions of attitude parameters received by BOKZ sensors in ground-based tests and in the conditions of a real space flight. This paper contains the accuracy estimations of the star sensor BOKZ-M that were obtained by processing the measurement data from the spacecraft Meteor-M.