Space-Based Hypersonic Vehicle Detection via Thermal Noise Analysis
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Solution Overview
Problem
Hypersonic vehicles pose a challenge for detection as they can evade conventional tracking techniques by following non-standard trajectories or flying below the detection capability of ground-based systems, and are difficult to detect from space due to being darkened.
Innovation Solution
The system forms multiple beams with coverage areas that cover an area-of-interest, measures signal profiles based on thermal noise floor and spectral signatures, and detects signal profiles that satisfy specific criteria relative to baseline profiles to determine the presence of a vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ground-based radar techniques are used for tracking, then standard trajectories can be monitored, but hypersonic vehicles flying below line-of-flight detection capability or following nonstandard trajectories cannot be detected
Solution Approach 1:
The patent transitions from ground-based radar detection to space-based detection, changing the detection dimension from terrestrial to orbital. This allows coverage of nonstandard trajectories and areas below ground-based line-of-flight detection capability by observing from space, thereby resolving the contradiction between detection reliability and detection coverage adaptability.
2Area of stationary object
If space-based radar techniques are used for detection, then coverage area is increased, but hypersonic vehicles that are darkened become difficult to detect
Solution Approach 1:
The patent introduces an intermediary detection method that does not rely on active radar illumination of the darkened vehicle. Instead, it uses passive detection of thermal radiation and spectral signatures emitted by the hypersonic vehicle itself, allowing detection of darkened vehicles while maintaining space-based coverage advantage.
Solution Approach 2:
The patent detects hypersonic vehicles by measuring thermal radiation and spectral signatures, which are forms of electromagnetic emission related to the vehicle's thermal state and material composition. This allows detection of darkened vehicles that do not reflect radar waves, by detecting their own emitted radiation in specific spectral bands.
3Area of stationary object
If multiple beams with multiple coverage areas are formed to cover area-of-interest, then detection coverage is improved, but system complexity increases
Solution Approach 1:
The patent employs a space-based detection system that uses multiple beams for multiple purposes: coverage expansion, signal profile measurement, and anomaly detection. This multi-functional approach allows the system to achieve comprehensive coverage and reliable detection without proportionally increasing complexity, as the same infrastructure serves multiple detection functions.
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
This approach allows for the detection of hypersonic vehicles by identifying anomalies in thermal noise and spectral signatures, effectively overcoming the limitations of conventional tracking methods.
Implementation Method 1
a signal profile is based on a measured thermal noise floor in a respective coverage area and compared with a baseline thermal noise floor determined for the coverage areas
Implementation Method 2
a signal profile may be based on a spectral signature in a respective coverage area and compared with a baseline spectral signature determined for the coverage areas
Data Source
AI summary
Methods, systems, and devices for communication are described. Multiple beams having multiple coverage areas that cover an area-of-interest may be formed. Respective signal profiles may be measured for the coverage areas. Based on the measuring, a signal profile that satisfies a criterion relative to the other signal profiles may be detected. Based on detecting that a signal profile satisfies the criterion, a presence of a vehicle in the area-of-interest may be determined.