Satellite Constellation Integrity Check for Spoofing Detection
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Solution Overview
Problem
Current air, sea, and land traffic control systems are vulnerable to spoofing or falsification of transponder signals, particularly in remote areas not covered by existing surveillance systems, lacking effective anti-spoofing or anti-switch-off mechanisms, which poses a risk to global airspace and maritime safety.
Innovation Solution
A satellite-based Global Integrity Check System (GICS) utilizing a constellation of small satellites with multiple radar modes, including ADS-B, Low Frequency Wide Swath Radar, Passive Coherent Bistatic Radar, and Microwave Imaging Radar, to detect anomalies and provide permanent surveillance, tracking, and positioning of vehicles equipped with transponders, even in areas not covered by traditional systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If cooperative tracking systems using satellites to receive transponder signals are used, then surveillance coverage is provided, but the system is vulnerable to spoofing or falsification of transponder signals
Solution Approach 1:
The patent introduces an intermediary verification system that acts as a mediator between the transponder signal source and the surveillance system. This includes using multiple independent detection methods (radar, ADS-B, AIS) to cross-verify the same target's position and identity, thereby detecting spoofing attempts without requiring changes to the original transponder systems.
Solution Approach 2:
The system performs preliminary integrity checks on transponder signals before fully trusting the data for surveillance purposes. This includes pre-verification of signal consistency across multiple sources, pre-detection of anomalies in signal patterns, and preliminary cross-checking against known target databases to identify potential spoofing before it compromises the surveillance system.
2Measurement precision
If transponders are used for vehicle identification and positioning, then tracking capability is improved, but the system fails when transponders are switched off or spoofed
Solution Approach 1:
The patent changes the operational parameters of the surveillance system by switching between different detection modes and frequency bands. When transponder signals are unavailable or suspicious, the system transitions to passive radar detection, changes signal processing parameters, and adjusts tracking algorithms to maintain continuous monitoring without relying on active transponder cooperation.
Solution Approach 2:
The system dynamically adapts its detection and tracking methods based on the operational status of transponders. It continuously monitors signal quality and automatically switches between cooperative (transponder-based) and non-cooperative (passive detection) modes, making the tracking system flexible and resilient to transponder failures or spoofing attempts.
3Measurement precision
If current air, sea, and ground traffic control surveillance systems are used, then localized tracking is achieved, but global surveillance coverage is not provided
Solution Approach 1:
The patent creates a universal surveillance system that integrates multiple existing traffic control systems (air traffic control radar, maritime AIS, ground vehicle GPS) into a single multi-functional platform. This unified system can track vehicles across different domains (air, sea, land) and geographic regions, providing global coverage while maintaining the precision of individual specialized systems through coordinated multi-sensor operation.
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 GICS offers seamless, global surveillance and tracking capabilities, including vehicles without transponders, with high update rates, enabling the detection of hazardous situations and precise location of anomalies, enhancing air traffic control and search and rescue operations.
Implementation Method 1
Low Frequency Wide Swath Radar
Implementation Method 2
Passive Coherent Bistatic Radar
Implementation Method 3
Microwave Imaging Radar
Data Source
AI summary
A system to acquire and track vehicles travelling in airspace, sea and land via a constellation of satellites. The system includes: (a) means for detecting a first signal from a vehicle; (b) a process for detecting anomaly from the first signal and determining whether it occurs inside or outside a first radar mode coverage area; (c) means for detecting a second signal from the vehicle under a first radar mode if the anomaly occurs inside its coverage area; (d) means for detecting a third signal from the vehicle under a second radar mode if the anomaly occurs outside the first radar mode coverage area; and (e) means for (i) refining the second or third signal from the vehicle under a third radar mode, such that the first, second, third and fourth detecting means are sequentially activated to detect the first, second and third signals by each satellite.