Method for quickly obtaining radar basic reflectivity three-dimensional contour data

A contour and reflectivity technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of ambiguity in the determination of contours in quadrilateral grids, obstacles to rapid extraction of three-dimensional contours, etc., to facilitate manual interpretation and analysis, Good social and economic effects, the effect of promoting networking

Active Publication Date: 2018-12-18
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the extraction process, the radar data needs to be converted into a three-dimensional regular grid first, and then the reflectance data corresponding to each grid is obtained through a large number of interpolation, and then the contour line is calculated; this process requires the original detection data of the radar. A large number of interpolation calculations, and there is a big difference between the spatial distribution of the regular grid and the radar scanning method. There is ambiguity in the judgment of the contour line of the quadrilateral grid, and additional calculations are required to deal with such problems
This method has to do a lot of preprocessing calculations before extracting contours, which hinders the rapid extraction of 3D contours

Method used

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  • Method for quickly obtaining radar basic reflectivity three-dimensional contour data
  • Method for quickly obtaining radar basic reflectivity three-dimensional contour data
  • Method for quickly obtaining radar basic reflectivity three-dimensional contour data

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The present invention obtains the radar basic reflectivity data method fast, and its specific steps are as follows:

[0045] (1) In the radar reflectivity data to be processed, obtain the scanning layer data with a preset elevation angle, and calculate the spatial position coordinates of the i-th library data on the scanning line of each azimuth angle in the scanning layer, where i represents the scanning line Any data point on , and 1 ≤ i ≤ the number of data points on the scan line:

[0046] The latitude and longitude coordinates of the radar center are: (radarLX, radarLY, radarHKm (unit: kilometer or kilometer)), on the scanning line where the elevation angle of a scanning layer of the radar is elevaAngle (unit: radian), and the azimuth angle is AZ_angle (unit: radian) , the distance to the first library is firstGate (unit: kilometers), and the length of the library is W (unit: kilometers), then the spatial latitude and longitude position coordinates of the i-th libr...

Embodiment 2

[0066] In this example, on the basis of Example 1, the non-closed contour is further searched, and the specific process is as follows:

[0067] A. According to the two vertices of the starting edge found from the boundary, the point coordinates on the starting edge equal to the reflectivity factor Z value are calculated by interpolation, and added to the point set of the contour line, and then on the starting edge Find a new side that also meets the conditions on the other two sides of the triangle, that is, the Z value is between the reflectivity values ​​of the two vertices of the side, and the new side is used as the current starting side, and the two vertices of the new side Perform interpolation calculations to obtain the point coordinates on the side that are equal to the Z value of the reflectivity factor, add the point coordinates to the contour point set, and remove the current triangle from the triangles to be searched;

[0068] B. Find the triangle adjacent to the n...

Embodiment 3

[0072] In this example, on the basis of Example 2, the closed contour is further searched, and the specific process is as follows:

[0073] a. Search for any qualified side from the unremoved triangle as the starting side, that is, the value of the reflectivity factor Z is between the reflectivity values ​​of the two vertices of the starting side, if no such starting side can be found Then end the closed contour search; if you find the starting edge that meets the conditions, go to the next step;

[0074] b. Perform interpolation calculation on the two vertices of the found starting edge to obtain the point coordinates on the edge that are equal to the reflectivity factor Z value (the point), and add the point coordinates to the contour point set; then in the starting edge Find a new edge that also meets the conditions on the other two edges of any triangle where the edge is located, that is, the Z value is between the reflectivity values ​​of the two vertices of the edge, and...

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Abstract

The invention provides a method for quickly obtaining radar basic reflectivity three-dimensional contour data. The method for quickly obtaining the radar basic reflectivity three-dimensional contour data constructs a triangular mesh by directly using original data points detected by the radar, thereby quickly obtaining the radar basic reflectivity three-dimensional contour data with vector features. The method for quickly obtaining the radar basic reflectivity three-dimensional contour data is beneficial to realize global sharing of radar product data, provides effective decision support for disaster reduction and disaster prevention of meteorological disasters, and has good social and economic effects; meanwhile, the data acquisition has high efficiency and high precision, and is convenient for manual interpretation analysis, which can shorten the response time of relevant departments to disasters.

Description

Technical field: [0001] The invention relates to a method for quickly acquiring three-dimensional contour data of radar basic reflectivity. Background technique: [0002] At present, the conventional radar basic reflectivity data is basically in the form of two-dimensional plane images, while the radar single-layer scanning data is essentially distributed in three-dimensional space, and the current acquisition of its three-dimensional contour data is generally based on three-dimensional regular grid data for calculation. In the extraction process, the radar data needs to be converted into a three-dimensional regular grid first, and then the reflectance data corresponding to each grid is obtained through a large number of interpolation, and then the contour line is calculated; this process requires the original detection data of the radar. A large number of interpolation calculations are required, and there is a big difference between the spatial distribution of the regular g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 路明月毛远翔闵锦忠王新昊毕硕本
Owner NANJING UNIV OF INFORMATION SCI & TECH
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