Weather radar system and method for estimating vertically integrated liquid content
First Claim
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1. An aircraft hazard warning system, comprising:
- a processing system configured to determine a vertically integrated liquid (VIL) parameter, the processing system configured to receive radar reflectivity data associated with an aircraft radar antenna, the processing system configured to determine the VIL parameter by determining a first reflectivity value at a first altitude and a second reflectivity value at a second altitude in response to the radar reflectivity data, the processing system configured to determine the VIL parameter using a base storm altitude and a top storm altitude, wherein the VIL parameter is calculated using values for the first altitude and second altitude.
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Abstract
A hazard warning system includes a processing system. The processing system determines a vertically integrated liquid (VIL) parameter. The processing system receives radar reflectivity data associated with an aircraft radar antenna and determines the VIL parameter by determining a first reflectivity value at a first altitude and a second reflectivity value at a second altitude using the radar reflectivity data. The processing system determines the VIL parameter using a base storm altitude and a top storm altitude.
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Citations
20 Claims
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1. An aircraft hazard warning system, comprising:
a processing system configured to determine a vertically integrated liquid (VIL) parameter, the processing system configured to receive radar reflectivity data associated with an aircraft radar antenna, the processing system configured to determine the VIL parameter by determining a first reflectivity value at a first altitude and a second reflectivity value at a second altitude in response to the radar reflectivity data, the processing system configured to determine the VIL parameter using a base storm altitude and a top storm altitude, wherein the VIL parameter is calculated using values for the first altitude and second altitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15)
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10. An aircraft hazard warning system, comprising:
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a processing system for determining a vertically integrated liquid (VIL) parameter, the processing system receiving radar reflectivity data associated with an aircraft radar antenna, the processing system determining the VIL parameter by determining a first reflectivity value at a first altitude and a second reflectivity value at a second altitude in response to the radar reflectivity data, the processing determining the VIL parameter using a base storm altitude and a top storm altitude, wherein the VIL parameter is calculated using the altitude and second altitude, wherein the processing system uses at least one of the following equations;
M*=MFreezing(AFreezing−
ABase)+(A−
40−
AFreezing)√
{square root over ((MFreezing×
M−
40))}+M−
40(ATop−
A−
40), or
M*=MFreezing(AFreezing−
ABase)+½
(MFreezing+M−
40)(A−
40−
AFreezing)+M−
40(ATop−
A−
40)where; AFreezing=altitude of a freezing level; A−
40=altitude of a −
40°
C. level;ABase the base storm altitude; ATop=the top storm altitude; MFreezing=rain mass per unit volume at the freezing level; M−
40=rain mass per unit volume at the −
40°
C. level; andM*=the VIL parameter. - View Dependent Claims (11)
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16. A method of determining a vertically integrated liquid (VIL) parameter on an aircraft using an electronic processor, the method comprising:
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receiving radar reflectivity data and temperature data and determining a first reflectivity value at a first altitude and a second reflectivity value at a second altitude using the electronic processor; and providing the VIL parameter at least in part in response to the first reflectivity value and the second reflectivity value, wherein the VIL parameter is provided in response to a mathematical operation using a value of the first altitude and a value of a third altitude of a storm top or a storm base. - View Dependent Claims (17, 18, 19)
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20. An aircraft weather radar system, comprising:
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a radar antenna for receiving radar returns; and means for determining a VIL parameter in response to reflectivity values at least two altitudes associated with the radar returns, wherein the means for determining the VIL parameter uses at least four altitudes values to calculate the VIL parameter, the at least four altitude values comprising a storm top value, a storm base value, a value of one of the two altitudes and a value of the other of the two altitudes.
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Specification