A Synchronous Correlation Method for Distributed Multi-sensor Space Targets

Abstract

The present invention provides a distributed multi-sensor space target synchronous association method, comprising: acquiring a group of star maps that are captured synchronously by sensors, overlapping fields of view and extracting space targets; saving the centroids of all space targets in the star map The pixel coordinates in the image; splice any two star maps; calculate the basic matrix between the two spliced ​​star maps according to the orbit data and attitude data of the satellite where the sensor is located and the internal and external parameters of the camera; take the centroid of any space object in each star map The pixel coordinates and the basic matrix are brought into the epipolar geometric constraint formula for calculation, and all pixel coordinate combinations in the star map are traversed, and the candidate corresponding point combinations of the same target are selected according to the epipolar geometric constraint threshold; until all star map combinations are traversed for target association, And ensure that each point has at most one corresponding point. The present invention solves the technical problem of object association by performing equivalent processing on the space object in the distant view and the corner point in the near view, and the success rate of the association can reach more than 90%.

Description

technical field [0001] The invention relates to the technical field of spatial object association, in particular to a distributed multi-sensor spatial object synchronous association method. Background technique [0002] As the number of space debris continues to increase, a large number of in-orbit debris has become a space target that countries focus on. Space situational awareness is particularly critical to the surveillance capability of space debris. my country's space situational awareness started late, and it is difficult to deploy stations around the world. The high cost of multi-satellite networking of surveillance satellites has resulted in my country's weak ability to monitor space debris, which will seriously affect the flight safety of my country's high-orbit aircraft and the utilization of high-orbit resources. Publication No. CN104776848A proposes a space target identification, positioning, and tracking method, aiming to use a large number of star sensors carrie...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing target association algorithms are based on a segment of video or multiple frames of images shot by the same sensor, using the prior information of the target and statistical principles, and using the distance between the pixels of adjacent frames as the correlation basis, to associate the same target in the same The motion trajectory under the sensor, but it is not suitable for the target association problem of multiple star sensors imaging at the same time without prior information of the target

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