GEO target autonomous segmental arc association and orbit determination method for space-based optical surveillance

Abstract

The invention discloses a GEO target autonomous segmental arc association and orbit determination method for space-based optical surveillance, relates to the technical field of spaceflight. The methodhas high association accuracy and orbit determination precision. The method comprises the following steps: firstly, solving a Lambert equation by utilizing position vectors corresponding to any two short arc initial rails; obtaining a high-precision initial orbit semi-major axis, performing distance assignment on angle measurement data points by utilizing a near-circular orbit hypothesis, furthercompleting initial orbit improvement under a perturbation condition, comparing the difference between an initial orbit improvement result and an original observation angle, and selecting an observation residual error slope as a judgment threshold to carry out initial orbit inter-arc-segment correlation; taking the associated initial orbit result between the two arc sections as the initial numberof the cataloguing library, carrying out the autonomous distance prediction of a new observation arc section, combining with the actual angle measurement data, carrying out the orbit improvement and correlation judgment, and achieving the steady GEO target autonomous cataloguing orbit updating and maintaining.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a method for autonomous arc-segment association and orbit determination of a GEO target for space-based optical surveillance. Background technique [0002] Realizing the normalized monitoring of global space targets is the foundation of using space. The United States, Russia, France, Japan and other world powers have successively established space target monitoring "national teams" to undertake the detection, cataloging, reconnaissance and monitoring tasks of space targets. GEO satellites are widely used in global communication, reconnaissance, early warning and other fields, and are scarce strategic space resources. It is of great significance to carry out a complete detection catalog of global GEO targets, and to determine the target's orbital position and behavioral intention. [0003] Space-based optical surveillance satellites have the characteristics of global inspectio...

AI Technical Summary

Problems solved by technology

[0004] However, there are some systematic difficulties in the autonomous correlation and orbit determination of space-based optical observation data

Due to the high speed of the satellite platform itself, the observation arc of each GEO target is short, and the convergence and accuracy of the short-arc initial orbit determination cannot be guaranteed.

At the same time, the orientation of the orbit plane of the space-based platform in the inertial system is relatively fixed. If large-scale attitude maneuvers are not used, the positions of the obtained observation arcs in the inertial system are relatively fixed, and the geometric distribution is sparse, so that independent correlation and high-precision positioning can be realized. Track cataloging is very difficult

Images