Method for attitude determination of spacecraft using a direction vector and a total momentum measurement

摘要

To establish the position of a satellite in space, direction vectors (2) and twist vectors (5) are taken as the basis, with sensor and twist data taken as the start values to determine the position. An initial vector determination is by measurement of a direction vector in a coordinate system at the body by sensors (9), and a second vector determination is taken from a reference coordinate system (8) based on the path position (11) and an orbit model (1). A third vector determination of the total twist vector is from the coordinate system at the body and a fourth vector determination of the reference total twist vector is established in a reference coordinate system through the timed propagation of known start values of the total twist or a timed projection in a matrix.