LEO Surveillance Optical Network Mesh Layout
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Solution Overview
Problem
Current systems for monitoring low Earth orbit (LEO) space debris face challenges in rapid detection, frequent re-acquisition, and maintaining precise orbital parameter updates due to limitations in sensitivity, resolution, and field of view, particularly in detecting small objects and handling geographical and meteorological constraints.
Innovation Solution
A ground-based optical surveillance system is deployed with a network of optical monitoring stations positioned according to a mesh layout optimized for 24-hour coverage and revisit duration, using wide-field passive detectors with short integration times and adaptive illumination conditions to detect and track LEO objects, ensuring 95% coverage of objects over 10 cm with precision in orbital parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar solutions are used for LEO surveillance, then detection sensitivity and field of view are improved, but cost of development, operation and maintenance increases significantly
Solution Approach 1:
The patent replaces radar (electromagnetic active detection) with optical detection systems that use passive light collection. This substitution maintains detection capability while dramatically reducing power consumption, infrastructure requirements, and operational costs. The optical systems use telescopes with large apertures to collect reflected sunlight from debris, achieving comparable detection sensitivity without the high costs associated with radar systems.
2Measurement precision
If optical systems with large aperture are used, then detection sensitivity is improved, but field of view decreases
Solution Approach 1:
The patent divides the sky surveillance task into multiple segments by deploying several optical telescopes at different geographic locations. Each telescope covers a specific portion of the sky with its wide field of view, and together they provide comprehensive global coverage. This segmentation allows each individual telescope to maintain both large aperture for sensitivity and wide field of view for area coverage.
Solution Approach 2:
The patent transitions from a single-location system to a distributed multi-location network. By adding the spatial dimension of geographic distribution, the system achieves both high detection sensitivity (through large aperture telescopes at each location) and wide effective field of view (through collective coverage from multiple locations around the globe).
3Adaptability or versatility
If ground-based optical systems are positioned in equatorial zone, then access to orbital population is improved, but temperature and humidity conditions worsen
Solution Approach 1:
The patent selects specific geographic locations that optimize the balance between orbital coverage and environmental conditions. Rather than uniformly distributing systems across the equator, it chooses high-altitude sites in tropical and subtropical regions (such as the Atacama Desert in Chile) where thin atmosphere provides excellent optical transparency and lower temperatures reduce thermal distortion, while still maintaining good access to the orbital population.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides competitive cost performance compared to radar solutions, achieving equivalent coverage and precision in LEO object detection and tracking, with a revisit duration of up to one week and precision of 100 m and 2 m/s, enabling effective collision risk assessment and avoidance maneuvers.
Implementation Method 1
their principle lies in the detection of sunlight reflected by natural or artificial objects in orbit around the Earth
Data Source
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AI summary
The invention relates to a method for making a space watch system for the LEO areas of the Earth orbit, characterized in that said method comprises a step of providing and arraying stations of optical watch systems on the surface of the planet according to a mesh suitable for providing an efficient daily cycle of the system close to 24h and a selected revisit duration of the observed LEO area.