A method for on-orbit discovery and navigation of space objects based on GNSS multipath signals

By observing GNSS multipath signals received by satellites, eliminating interference from missing signals, estimating parameters, and fitting the target orbit, the problem of dependence on ground-based equipment in existing technologies has been solved, enabling autonomous discovery and navigation of space targets and improving discovery capabilities.

CN117741708BActive Publication Date: 2026-07-14SHANGHAI AEROSPACE CONTROL TECH INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI AEROSPACE CONTROL TECH INST
Filing Date
2023-11-14
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies rely on ground-based equipment and prior information for space target detection, resulting in high time costs and increased resource consumption, making it difficult to achieve remote detection and inspection.

Method used

By using the GNSS receiver onboard the observation satellite to receive GNSS multipath signals reflected by space targets, by eliminating interference from missing signals, estimating the multipath signal parameters, obtaining information about the target's reflecting surface, and by fitting the target's orbit through short-arc orbit determination, navigation information is provided.

Benefits of technology

It enables autonomous detection of space targets without prior information or ground equipment support, improves the ability to detect centimeter-level metallic targets in low and medium orbits, has a wide range of applications, and reduces dependence on equipment.

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Abstract

The application relates to a space target on-orbit discovery and navigation method based on GNSS multipath signals, and specifically comprises the following steps: S1, discovering space multipath signals by an observation satellite, and excluding missing signal interference; S2, inversely tracing the multipath signals, estimating parameters of the multipath signals, and obtaining information of a target reflection surface; and S3, confirming the target and giving navigation information of the target. The application can complete discovery and position determination of the space target by virtue of the GNSS multipath signals reflected by the space target and received by the GNSS receiver carried by the observation satellite without prior information and ground equipment support, and has wide applicability.
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