A strict regression orbit design method, system and medium considering high-order gravitational field

Abstract

The present invention provides a strict return orbit design method, system and medium considering the high-order gravity field, including: satellite orbit preliminary design step: according to the overall input of satellite orbit design, including return days and return circles, consider 2 Analytical design of regression orbit parameters affected by perturbation, the analytical design results are obtained, and the differential correction of the analytical design results is carried out by the Newton iterative method, and the J 2 The initial value of the initial design of the perturbed satellite orbit; the strict regression orbit design step: according to the obtained initial value of the strict regression orbit optimization design, the Newton iterative method is combined with the multi-objective optimization algorithm NSGA-II, and the regression under the high-precision gravity field Orbital hybrid optimization design algorithm to realize fast optimal design of strict regression orbit. Compared with the existing method, the present invention considers a more accurate dynamic environment, can greatly improve the regression accuracy, and meets the application requirements of the synthetic aperture radar interferometry system.

Description

technical field [0001] The invention relates to the field of spaceflight technology, in particular to a strict return orbit design method considering the earth's high-order gravitational field. Background technique [0002] Regression orbit refers to a special type of orbit in which satellite sub-satellite point trajectories reappear after a period of time, and the distance between adjacent trajectories on the same latitude circle is the same. The return orbit can meet the mission requirements of periodic dynamic observation of specific ground targets. At present, it has been widely used in missions such as earth imaging observation and earth science exploration. In particular, the strict regression characteristics of satellite orbits guarantee the application and implementation of a new type of space technology, Interferometry Synthetic Aperture Radar (InSAR). The InSAR satellite system needs to obtain the phase difference and spatial distance difference produced by two ob...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the studies on the return orbit design only consider the perturbation effect of the J2 term of the Earth's non-spherical gravity

Images