Research on Adaptability of BDS Satellite in-Orbit Attitude Control Mode of Precise Orbit Determination

Abstract

Orbit dynamics model is one of the most important factors determining the precision of orbit determination. It also determines navigation and positioning accuracy of navigation satellite system. The orbital perturbation force can be divided into two parts, conservative force and non-conservative force. For medium and high earth orbit navigation satellites, solar radiation pressure is the non-conservative force, that is closely related to the in-orbit attitude control mode and engineering parameters of the satellite. Taking BDS navigation satellite as example, the satellite in-orbit attitude control mode and the change of key parameters has been analyzed. On the basis of that, the difference of solar radiation pressure for three attitude control modes have been calculated and proposed, that are normal yaw-steering, yaw-fixed, and high-angle maneuvering. Seven-parameter optical pressure analysis model has been established. Based on precise ephemeris determined by laser range data, adaptability of solar radiation pressure models of different attitude control modes and precise orbit determination has been analyzed and studied. The results show that, the attitude control mode is the decisive factor of solar radiation pressure model which can not be ignored. Any other amendments are not considered. The solar radiation pressure models suitable for attitude control modes have been adopted. T precision of orbit determination is sub-meter level, which be not affected by the attitude control mode.