Abstract:

According to the cataloging and imaging applications for high orbit objects, a space-based constellation running in sub-geosynchronous orbits is presented in this paper, which has the function of both cataloging and imaging. To meet the synchronization belt object detection cataloging requirements, the influence of the constellation orbit deployment and optical payload scanning mode on the detection efficiency is analyzed and deduced, and there are more feasible solutions for the constellation composed of two prograde orbit satellites with higher comprehensive efficiency. An attitude guidance law meeting the detection requirements is proposed and applied to one solution taken from the feasible solutions. The simulation results show that the constellation composed of two prograde orbit satellites can traverse seamlessly all the geosynchronous Earth orbit objects whose inclination are not more than the semifield angle of the optical payload in both summer solstice and autumnal equinox, the detections are not less than 4 times and the observation arc length is not less than 1 minute, and the conclusion agrees with the theoretical analysis.

Key words: High orbit objects surveillance, Detection efficiency, Constellation deployment, Scanning mode, Traversal time, Observation arc length