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Method and application for correcting Doppler velocities by scanning radar for distributed soft targets

A Doppler velocity scanning radar technology, applied in the field of Doppler velocity correction, can solve problems such as ignoring radar beam scanning velocity, and achieve the effect of improving accuracy

Active Publication Date: 2018-12-14
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The detection based on Doppler radar RHI scanning method is one of the main methods to obtain the velocity field of distributed soft targets in the vertical scanning plane, but for the reliability of Doppler velocity, only radar measurement error, noise and other factors are considered. effect, while ignoring the velocity "distortion" caused by radar beam scanning

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  • Method and application for correcting Doppler velocities by scanning radar for distributed soft targets
  • Method and application for correcting Doppler velocities by scanning radar for distributed soft targets
  • Method and application for correcting Doppler velocities by scanning radar for distributed soft targets

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with drawings and embodiments.

[0025] Such as figure 2 As shown, the present invention provides a scanning radar Doppler velocity correction method for distributed soft targets, comprising the following steps:

[0026] (S1) Scanning the radar to obtain the Doppler velocity of each location point on the distributed soft target, and estimating the plane velocity of each location point on the distributed soft target on the radar scanning plane;

[0027] In a specific embodiment, at first, the method in the prior art is used to estimate the plane velocity V of each position point in the distributed soft target under the Cartesian coordinate system x ,V y , V x Indicates the horizontal velocity of the target point, V y Indicates the vertical velocity of the target point, such as image 3 shown. In the prior art, there are many methods for inverting the velocity field based on the Doppler velocity. ...

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Abstract

The invention belongs to the technical field of radar detection, and relates to a method and application for correcting Doppler velocities obtained by scanning radar in distributed soft target velocity field detection. The method comprises the following steps: (S1) performing radar scanning to obtain Doppler velocities of each position point on the distributed soft targets, and estimating plane velocities of each position point on the distributed soft targets on a radar scanning plane; (S2) estimating accelerations of each position point on the distributed soft targets according to the material derivative based on the plane velocities and Doppler velocities of each position point; and (S3) correcting the velocities of each position point on the distributed soft targets according to the velocity correction formula. The invention also provides an application process for acquiring correction speeds of each position point on the wake of the aircraft by using the Doppler velocity correctionmethod, and estimating the vortex core trajectory of the aircraft wake vortex according to the correction velocities of each position point. By correcting the Doppler velocity field by the invention,the accuracy of wind speed estimation in the field of meteorological detection can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of radar detection, and relates to a correction method and application of Doppler velocity obtained by RHI (RangeHeight Indicator, abbreviation: RHI) scanning radar in distributed soft target velocity field detection. Background technique [0002] Distributed soft targets refer to targets with a huge distribution range, variable internal structure and velocity, such as the atmosphere, rainfall, aircraft wake, etc. The detection of its velocity field has attracted much attention in meteorology and other fields. The detection based on Doppler radar RHI scanning method is one of the main methods to obtain the velocity field of distributed soft targets in the vertical scanning plane, but for the reliability of Doppler velocity, only radar measurement error, noise and other factors are considered. effect, ignoring the velocity "distortion" caused by the radar beam scan. It takes a certain amount of time (usually...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 李健兵高航王雪松庞晨
Owner NAT UNIV OF DEFENSE TECH
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