Synchronous orbit satellite relative dip angle remote correcting method based on line-of-sight measurement

Abstract

The invention discloses a synchronous orbit satellite relative dip angle remote correcting method based on line-of-sight measurement. The method comprises the following steps: at first, carrying out remote orbit control on a synchronous orbit satellite through absolute navigation information provided by a ground measurement and control system, and directing the synchronous orbit satellite to a remote mooring point in the rear of a task object; then, through relative navigation information of an optical sensor and the absolute navigation information provided by the ground measurement and control system, and in combination with typical motion features of the relative orbit of a spacecraft, adopting the Least Squares method to fit and forecast variation of a line-of-sight azimuth angle; further, forecasting the periodic relative motion outside an orbital plane between the satellite and task object in combination with the nominal distance at the mooring point; and finally, carrying out velocity pulse control outside of the orbital plane on the operating satellite at the mooring point to eliminate relative position error outside of the orbital plane caused by the relative dip angle to avoid the situation that the task object is lost because the task object is beyond the field of view of the optical sensor, so that the satellite can rapidly and accurately approach the task object.

Description

technical field [0001] The invention relates to the field of relative navigation and control of long-distance non-cooperative targets based on line-of-sight measurement information, in particular to a long-distance correction method for relative inclination of synchronous orbit satellites based on line-of-sight measurement. Background technique [0002] In missions such as spacecraft on-orbit service, the line-of-sight navigation method using optical cameras as the main detection method is considered to be an important means for non-cooperative autonomous relative navigation of spacecraft. The relative navigation equipment for line-of-sight measurement has many characteristics such as light weight, low power consumption, and compact structure, and it belongs to passive detection. The application research in the field of autonomous rendezvous in space is constantly emerging. [0003] The problem of relative navigation of long-distance non-cooperative targets based on line-of-...

AI Technical Summary

Problems solved by technology

Since only the relative pointing information of the target can be obtained, but the relative distance information between the tracking spacecraft and the target is lacking, the distance estimation error along the direction of the spacecraft line during the filtering estimation process accumulates significantly.

This deficiency is inherent in relative navigation methods that use only line-of-sight measurement information (Chari, R.J.V.. Autonomous Orbital Rendezvous Using Angles-Only Navigaiton[D]. Massachusetts: Massachusetts Institute of Technology, 2001)

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