Dynamic Weather Envelope Boundary Adjustment for Aircraft Radar
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Solution Overview
Problem
Current airborne weather radar systems, such as the RDR-4000 IntuVue, face challenges in accurately determining relevant weather at high altitudes, leading to non-threatening weather being incorrectly identified as relevant due to a fixed 25,000ft lower boundary, which can result in inefficient flight path decisions.
Innovation Solution
The system calculates vertically integrated reflectivity using 3D weather radar data and adjusts the lower boundary of the relevant weather envelope based on this calculation, allowing for a dynamic adjustment of the envelope's lower boundary to better align with the aircraft's flight path and altitude, reducing false positive relevant weather indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed 25,000ft lower boundary is used for the relevant weather envelope, then convective weather hazards are reliably detected, but non-threatening stratiform weather at high altitudes is incorrectly identified as relevant
Solution Approach 1:
The patent applies the dynamics principle by making the lower boundary of the relevant weather envelope dynamic rather than fixed. The boundary automatically adjusts based on aircraft altitude and vertically integrated reflectivity calculations. At high altitudes (above 35,000ft), the lower boundary dynamically increases to reduce false positives from stratiform weather, while at lower altitudes it maintains the 25,000ft position to ensure convective weather detection reliability.
Solution Approach 2:
The patent applies parameter changes by modifying the lower boundary parameter of the relevant weather envelope based on vertically integrated reflectivity (VIR) calculations. When VIR exceeds a threshold at the aircraft's altitude, the lower boundary parameter is adjusted upward, changing the envelope's vertical extent to exclude non-threatening weather while maintaining inclusion of hazardous convective weather.
2Reliability
If the lower boundary is set at 25,000ft to account for frozen water reflectivity characteristics, then convective weather is reliably identified, but high-altitude aircraft experience delayed weather avoidance decisions
Solution Approach 1:
The patent applies preliminary action by performing vertically integrated reflectivity calculations and assessing weather threat levels in advance, before the aircraft reaches the weather. The system proactively adjusts the relevant weather envelope boundaries based on predicted threat levels, allowing pilots to make timely avoidance decisions earlier rather than later when encountering high-altitude stratiform weather.
Solution Approach 2:
The system dynamically adjusts the relevant weather envelope in real-time based on aircraft altitude and VIR calculations, allowing the boundary to adapt as the aircraft approaches weather systems. This dynamic adjustment ensures that the envelope maintains appropriate extent for threat assessment throughout the approach, enabling timely decision-making.
3Ease of operation
If a fixed relevant weather envelope is used, then the system is simple to operate, but it cannot adapt to different flight conditions and weather types
Solution Approach 1:
The patent applies self-service by enabling the weather radar system to automatically assess weather threats and adjust the relevant weather envelope without pilot intervention. The system performs vertically integrated reflectivity calculations, compares them against thresholds, and dynamically modifies the envelope boundaries autonomously based on current flight conditions and weather characteristics, adapting to different weather types and flight scenarios.
Solution Approach 2:
The system automatically changes the envelope boundary parameters based on vertically integrated reflectivity calculations and aircraft altitude. This parameter adjustment occurs transparently without requiring pilot input, maintaining ease of operation while achieving adaptability to different weather conditions through automated parameter modification.
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 provides more accurate flight path weather information by reducing false positives, allowing pilots to make timely and efficient decisions regarding weather avoidance, improving operational safety and efficiency.
Implementation Method 1
An airborne weather radar system, such as the RDR-4000 IntuVue, may be used
Implementation Method 2
The processor calculates vertically integrated reflectivity using the stored weather radar data at a predefined reference altitude
Data Source
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AI summary
Systems and methods for improving relevant weather determination for aircraft at altitude. An exemplary system (30) includes a weather radar component (40) and memory (43) that stores weather radar data in a three-dimensional (3D) buffer. A processor (42) calculates vertically integrated reflectivity using the stored weather radar data at a predefined reference altitude at one or more locations from the aircraft. The processor then adjusts a lower boundary of a relevant weather envelope from a first value to a second value, if the vertically integrated reflectivity is greater than a predefined threshold. The range of the adjusted lower boundary of the envelope is associated with the weather radar data having the calculated vertically integrated reflectivity greater than the predefined threshold. A display device (44) displays the weather radar data located within the envelope in a first manner and displays the weather radar data located outside of the envelope in a second manner.