Space-Based AIS Constellation for Global Maritime Tracking
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Solution Overview
Problem
Current Automatic Identification Systems (AIS) for maritime navigation face limitations in identifying and tracking vessels globally due to range constraints, accuracy issues, and vulnerability to tampering, which can lead to delayed collision avoidance and inadequate monitoring, especially in international waters.
Innovation Solution
A space-based AIS system utilizing a constellation of low earth orbit satellites and ground elements to receive, process, and transmit AIS information, including vessel speed, position, and identification, with on-board processing to validate signal accuracy and detect potential tampering, providing global coverage and real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a space-based satellite system is deployed to achieve global coverage, then monitoring coverage area is improved, but system complexity and cost increase
Solution Approach 1:
The patent transitions from terrestrial-based AIS monitoring to space-based satellite monitoring, moving the detection system from Earth's surface to orbital space. This dimensional change enables global coverage of oceanic areas that were previously inaccessible to ground-based systems, directly resolving the contradiction between coverage area and system complexity by accepting orbital deployment complexity in exchange for comprehensive global monitoring capability.
Solution Approach 2:
The system divides the global monitoring task into multiple satellite units operating in LEO constellations. Each satellite independently monitors its visible hemisphere, and the collective network achieves complete global coverage. This segmentation allows the system to manage complexity through modular deployment while maintaining extensive monitoring area.
2Length of stationary object
If AIS signal range is extended using terrestrial systems, then detection distance is improved, but signal accuracy and reliability deteriorate
Solution Approach 1:
The patent introduces satellites as intermediary detection platforms between AIS transmitters and ground receivers. By positioning receivers in space rather than on Earth's surface, the system achieves line-of-sight detection across entire oceanic hemispheres without terrestrial obstacles, extending detection distance while maintaining signal accuracy through direct space-to-ground signal paths.
3Ease of manufacture
If terrestrial AIS receivers are used, then system cost is reduced, but monitoring coverage and real-time capability are limited
Solution Approach 1:
The patent implements a space-based LEO satellite constellation to achieve global maritime monitoring coverage. By deploying receivers in orbital space rather than distributing them terrestrially, the system overcomes the limitation of ground-based line-of-sight constraints and achieves comprehensive oceanic coverage, directly addressing the contradiction between coverage area and system deployment complexity.
Data Source
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AI summary
A spaced-based system to simultaneously track and monitor one or more ocean going vessels at any point on the earth includes a plurality of satellites. Each satellite includes an AIS communications payload to receive AIS signals which have AIS information transmitted from the one or more vessels and to transmit the received AIS information. The system includes ground earth elements that each have a receiver to receive the AIS information transmitted from one or more of the plurality of satellites and globally track and monitor the one or more vessels based on the AIS information received from the communications payload. The satellites are distributed in two or more orbital planes located at a substantially common altitude and at a substantially common inclination.