Weather radar system and method for detecting a high altitude crystal cloud condition
First Claim
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1. An aircraft hazard warning system, comprising:
- a processing system for detecting a presence of at least one of a high altitude ice crystal (HAIC) or HAIC cloud (HAIC2) condition, the processing system being configured to cause a radar antenna to produce radar beams and receive radar returns associated with a region at high altitude, the processing system being configured to process radar return data associated with the radar returns and to detect the presence of the at least one of the HAIC or HAIC2 condition, wherein the processing system further comprises a first coherent integrator, a second coherent integrator, an amplitude detector, and a non-coherent integrator, wherein the processing system performs;
a coherent and non-coherent integration process to detect the presence, wherein the coherent and non-coherent integration process coherently integrates I return values associated with the radar return data in the first coherent integrator and Q return values associated with the radar return data in the second coherent integrator to produce integrated I values and integrated Q values, wherein combined amplitude values for a combination of the integrated I values and the integrated Q values are provided by the amplitude detector, wherein the combined amplitude values are non-coherently integrated by the non-coherent integrator to provide non-coherent integration values that are compared to a threshold, wherein if the non-coherent integration values are below the threshold, an HAIC or HAIC2 condition is not detected and if the non-coherent integration values are above the threshold, further processing is performed to detect the HAIC or HAIC2 condition.
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Abstract
The hazard warning system that included processing system for detecting a high altitude ice crystal (HAIC) or HAIC cloud (HAIC2) condition. The aircraft warning system can use an inferred detected process or a non-inferred detection process. Warnings of high altitude ice crystal conditions can allow an aircraft to avoid threats posed by HAIC or HAIC2 conditions including damage to aircraft equipment and engines.
261 Citations
20 Claims
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1. An aircraft hazard warning system, comprising:
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a processing system for detecting a presence of at least one of a high altitude ice crystal (HAIC) or HAIC cloud (HAIC2) condition, the processing system being configured to cause a radar antenna to produce radar beams and receive radar returns associated with a region at high altitude, the processing system being configured to process radar return data associated with the radar returns and to detect the presence of the at least one of the HAIC or HAIC2 condition, wherein the processing system further comprises a first coherent integrator, a second coherent integrator, an amplitude detector, and a non-coherent integrator, wherein the processing system performs; a coherent and non-coherent integration process to detect the presence, wherein the coherent and non-coherent integration process coherently integrates I return values associated with the radar return data in the first coherent integrator and Q return values associated with the radar return data in the second coherent integrator to produce integrated I values and integrated Q values, wherein combined amplitude values for a combination of the integrated I values and the integrated Q values are provided by the amplitude detector, wherein the combined amplitude values are non-coherently integrated by the non-coherent integrator to provide non-coherent integration values that are compared to a threshold, wherein if the non-coherent integration values are below the threshold, an HAIC or HAIC2 condition is not detected and if the non-coherent integration values are above the threshold, further processing is performed to detect the HAIC or HAIC2 condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of providing at least one of a high altitude ice crystal (HAIC) or HAIC cloud (HAIC2) information on an aircraft using an electronic processor, the method comprising:
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receiving radar reflectivity data; processing the radar reflectivity data to detect a presence of the at least one of the HAIC or HAIC2 condition by using a coherent and non-coherent integration process, wherein the coherent and non-coherent integration process coherently integrates I return values associated with the radar reflectivity data in a first coherent integrator and Q return values associated with the radar reflectivity data in a second coherent integrator to produce integrated I values and integrated Q values, wherein combined amplitude values for a combination of the integrated I values and the integrated Q values are provided by an amplitude detector, wherein the combined amplitude values are non-coherently integrated by a non-coherent integrator to provide non-coherent integration values that are compared to a threshold, wherein if the non-coherent integration values are below the threshold, an HAIC or HAIC2 condition is not detected and if the non-coherent integration values are above the threshold, further processing is performed to detect the HAIC or HAIC2 condition; and providing at least one of the HAIC or HAIC2 information to a pilot. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An aircraft weather radar system, comprising:
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a radar antenna for receiving radar returns; and means for determining a high altitude ice crystal (HAIC) or HAIC cloud (HAIC2) condition in response to the radar returns by a coherent and non-coherent integration process, wherein the coherent and non-coherent integration process coherently integrates I return values associated with the radar returns in a first coherent integrator and Q return values associated with the radar returns in a second coherent integrator to produce integrated I values and integrated Q values, wherein combined amplitude values for a combination of the integrated I values and the integrated Q values are provided by an amplitude detector, wherein the combined amplitude values are non-coherently integrated by a non-coherent integrator to provide non-coherent integration values that are compared to a threshold, wherein if the non-coherent integration values are below the threshold, an HAIC or HAIC2 condition is not detected and if the non-coherent integration values are above the threshold, further processing is performed to detect the HAIC or HAIC2 condition. - View Dependent Claims (18, 19, 20)
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Specification