METHOD OF ORIENTATION OF NAVIGATION SPACE APPARATUS Russian patent published in 2019 - IPC B64G1/24 

FIELD: astronautics.

SUBSTANCE: invention relates to space engineering. In the method of orientation of the navigation spacecraft (SC) during the preemptive software reversals according to the star device information in the process of conducting a proactive software reversal on each control cycle, the quaternion of the transition from the solar-terrestrial coordinate system is calculated at the time of the start of the pre-emptive reversal to the offset solar-earth coordinate system determined using the reference proactive reversal model. Using information from the star instrument, the quaternion of the transition from the associated coordinate system to the offset solar-earth coordinate system is calculated. From the obtained quaternion, the angles of deviation of the coordinate system connected from the displaced solar-terrestrial coordinate are calculated, control moments are formed, aimed at reducing the mismatch between the bound and displaced solar-terrestrial coordinate systems. Control moment around the first axis of the spacecraft is formed to reduce the mismatch between the reference and actual movements of the spacecraft around the first axis.

EFFECT: reducing the error in predicting the motion of the center of mass of the spacecraft.

1 cl, 5 dwg, 1 tbl