Abstract:

The detection of spacecraft attitude control and orbital control epoch is of great importance for modeling the orbital maneuver process. Since the traditional residuals detection method is insensitive to small model fault, a multi-dimensional statistical test method is proposed using double test confidences in the moving window. The proposed method is able to enhance statistic sensitivity by adjusting the values of the two confidences and the reliable test solution can then be used to detect attitude control beginning epoch accurately. In order to further detect orbital control epoch, this article also presents a linear attitude control force model and an orbital control thrust model to roughly compensate the maneuver process. Taking the third lunar orbital brake process of CE-1 as example, the proposed method is validated to detect attitude control and orbital control epoch nearly in real-time with observations from domestic VLBI network.

Key words: multi-dimensional test statistic, double test confidences, dynamic model fault, attitude control, orbital control, VLBI