Interrupted track correlation method of maritime target of high-orbit optical satellite

A technology for optical satellite and track association, which is applied in navigation, surveying and navigation, complex mathematical operations, etc., and can solve problems such as poor correlation effect
CN110686679AActive Publication Date: 2020-01-14NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
Publication Date
2020-01-14

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Abstract

The invention discloses an interrupted track correlation method of a maritime target of a high-orbit optical satellite. The method comprises the steps of: performing backward extrapolation on a previous first track and performing forward extrapolation on a latter second track; performing preliminary correlation on the first track and the second track whose state estimation at the same moment meetsconstraint conditions; performing further correlation on the tracks in a preliminary correlation set to obtain a further correlation set; solving the further correlation set by using a two-dimensional optimal allocation principle to obtain a first stage correlation set with the minimal global cost; solving a possible correlation segment pair of a complementary set of the first stage correlation set in the preliminary correlation set by using distance two-dimensional optimal allocation; detecting and screening an intermediate correlation set by using an amplitude relationship to obtain a second stage correlation set; and fitting correlated tracks in the first stage correlation set and the second stage correlation set to obtain a continuous track. By adopting the interrupted track correlation method of the maritime target of the high-orbit optical satellite disclosed by the invention, the performance of track correlation is improved.
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Description

technical field

[0001] The invention relates to the technical field of space-based maritime target monitoring, in particular to a high-orbit optical satellite maritime target interruption track correlation method. Background technique

[0002] The working modes of high-orbit (the present invention refers to geostationary orbit) optical satellites can be different according to the satellite observation tasks. Taking my country's "Gaofen No. 4" (GF-4) satellite as an example, its working modes are mainly divided into staring imaging , area imaging and mobile inspections. Among them, the staring imaging mode is continuous imaging of the surveillance area, the regional imaging mode is splicing imaging of the surveillance area, and the mobile inspection mode is based on mission requirements, using attitude maneuvers to quickly complete the imaging of multiple areas. Constrained by the resources on the satellite, the daily working hours of the satellite are limited and cannot be t...

Claims

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