Low-altitude wind shear wind speed estimating method based on space-time optimal processor

A low-altitude wind shear and wind speed estimation technology, used in instruments, fluid velocity measurement, velocity/acceleration/shock measurement, etc. The effect of wind speed

CN104035095AInactive Publication Date: 2014-09-10CIVIL AVIATION UNIV OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a low-altitude wind shear wind speed estimating method based on a space-time optimal processor and belongs to the field of airborne meteorological radar signal processing. The low-altitude wind shear wind speed estimating method based on the space-time optimal processor comprises the following steps of 1) reading aeroplane state parameters, radar antenna scanning parameters and the like from associated airborne equipment as prior information; 2) selecting a distance unit to be detected, and correcting the distance dependence of ground clutter through a space-time interpolation method; 3) compensating aeroplane speed through the prior information; 4) estimating the ground clutter covariance matrix of the distance unit to be detected; 5) suppressing the ground clutter and performing wind speed estimation through the space-time optimal processor; 6) repeating the steps of 2)-5) and sequentially performing wind speed estimation on the echo data of all the distance units. The low-altitude wind shear wind speed estimating method based on the space-time optimal processor is used for solving the problem of poor wind speed estimation precision under the background of heavy clutter and imports space-time information into an airborne meteorological radar. Simulation results prove the effectiveness of the low-altitude wind shear wind speed estimating method based on the space-time optimal processor.
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Description

technical field

[0001] The invention belongs to the technical field of airborne meteorological radar low-altitude windshear detection, in particular to a method for estimating low-altitude windshear wind speed based on a space-time optimal processor. Background technique

[0002] Airborne weather radar can detect and warn of thunderstorms, wind shear, turbulence and other disastrous weather. It is an important device for aircraft to perceive airway weather in real time. Its ability to detect dangerous weather is crucial to ensure the safety of aircraft. Low-altitude wind shear often refers to the meteorological phenomenon of sudden changes in wind direction and wind speed below an altitude of 600 meters. Low-altitude wind shear has the characteristics of sudden occurrence, short time, small scale, high intensity, and difficulty in detection. When an aircraft takes off and lands into a strong low-altitude wind shear area, it will face lift loss caused by changes in wind direc...

Examples

Embodiment Construction

[0028] The method for estimating low-altitude wind shear wind speed based on the space-time optimal processor provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, the low-altitude wind shear wind speed estimation method based on the space-time optimal processor provided by the present invention includes the following steps carried out in order:

[0030] 1) Read aircraft state parameters, radar antenna scanning parameters, etc. from the associated airborne equipment as prior information:

[0031] The aircraft speed, flight altitude, main lobe azimuth and pitch angle of antenna scanning are read from the airborne navigation equipment as prior information for signal processing.

[0032] 2) Select the distance unit to be detected, and use the space-time interpolation method to correct the distance dependence of ground clutter:

[0033] The present invention ...