CN109031233A - The method of quick obtaining radar complex reflectivity vector figure data - Google Patents
The method of quick obtaining radar complex reflectivity vector figure data Download PDFInfo
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- CN109031233A CN109031233A CN201810902227.3A CN201810902227A CN109031233A CN 109031233 A CN109031233 A CN 109031233A CN 201810902227 A CN201810902227 A CN 201810902227A CN 109031233 A CN109031233 A CN 109031233A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The present invention provides a kind of method of quick obtaining radar complex reflectivity vector figure data, includes the following steps: the normalization of radar three-dimensional scan data；The building of radar complex reflectivity data point structure；The building of composite reflectivity graph data；The whole world that the present invention is conducive to Radar Products data is shared, provides effective decision support for the disaster reduction and prevention of meteorological disaster, has good society and economic effect；Its ability for being quickly obtained data simultaneously has good technical effect, can shorten relevant departments for the response time of disaster.
Description
Technical field:
The present invention relates to a kind of methods of quick obtaining radar complex reflectivity vector figure data.
Background technique:
The acquisition of conventional radar complex reflectivity data is that rule-based grid is sought at present, obtains the knot of similar pixel picture
Fruit data.In the process, there is very big difference between the arranged of regular grid and radar scanning mode, it is therefore desirable to
A large amount of interpolation calculation is carried out by the existing GPR Detection Data of each layer, to obtain each corresponding spy of the small grid of rule
Measured data value finally obtains corresponding composite reflectivity data with this.On the one hand this method needs to consume a large amount of calculate and opens
Pin, on the other hand can introduce redundant data to a certain extent, increase the data volume of product data, answer for the transmission etc. of data
With bringing unnecessary obstruction.
Summary of the invention:
The present invention by normalization every layer of radar scan data, and then directly to radar detection to data point handle,
Quadrilateral mesh is constructed, the radar complex reflectance map graphic data with vector characteristic is obtained with this.
The specific technical solution of the present invention is as follows:
A kind of method of quick obtaining radar complex reflectivity vector figure data, includes the following steps:
1) normalization of radar three-dimensional scan data；
2) building of radar complex reflectivity data point structure；
3) composite reflectivity graph data constructs；
Wherein,
1) each layer of radar three-dimensional scan data all the normalization of radar three-dimensional scan data: is normalized to have 360
The index bed of scan-line data；After normalization, each scanning slice of radar corresponds to the next corresponding on azimuthal scan-line data；
2) building of radar complex reflectivity data point structure:
First, some data point P that minimum elevations correspond to scanning slice is projected on ground and obtains corresponding point P0, at point P
In i-th of position of the scanning slice j-th strip scan line, wherein j indicates the corresponding azimuthal angle of scan line, the value model of j
Enclosing is 0≤j≤359 and j is integer, and i indicates that any one a data point, the value range of i are 1≤i in the scan line
Data point number and i in≤the scan line are integer；
Second, in each layer of radar scanning data search and point P on same orientation angle sweep line with same position
The data point of index is simultaneously compared, and assigns the reflectivity values of reflectivity values maximum point to point P；
Third repeats the first and second steps, corresponds to each data point in scanning slice to minimum elevations and carry out respective handling, obtain
To radar complex reflectivity data point structure；
3) composite reflectivity graph data constructs: in above-mentioned radar complex reflectivity data point structure, sweeping to adjacent two
The two o'clock for successively taking adjacent i-th, the position i+1 on line respectively is retouched, be sequentially connected as vertex and be built into one four at total 4 points
Side shape dough sheet, and then construct all quad patch forms the quadrilateral mesh that adjoins each other to get to the radar scanning layer
Composite reflectivity vector figure data；
The present invention, which further designs, to be:
In step 1, the original each layer of radar scanning data is all normalized to the index bed with 360 scan-line datas includes
Following detailed process: in each scanning slice, centered on radar antenna position, with 0 degree of azimuth building, first scanning
Line, each integer azimuth construct a scan line, and so on, it is 359 degree that the 360th article of scan line azimuth, which is located at, structure
Build 360 scan lines；Data in each scan line are led to further according to each layer scan-line data of original radar reflectivity data
360 scan-line datas that interpolation calculation method is constructed are crossed, the normalized of radar three-dimensional scan data is thus completed.
The data point space interval on line of each scan-line data is 1 kilometer.
In step 3, to four vertex of obtained each quad patch, corresponding face is assigned respectively according to reflectivity data
Color, then by the color on each four vertex of quad patch, the colouration with color gradient effect is drawn out by gradual manner
Quadrilateral mesh.
Wherein gradual manner is the color interpolation function using computer graphics itself, obtains the quadrangle of color gradient
Dough sheet.
The present invention has the following beneficial effects: compared with prior art
Interpolation calculation is carried out using regular grid in view of in the current conventional method for obtaining radar complex reflectivity, is had biggish
Computing cost, while certain redundant data is introduced, the data volume of product is increased, is brought for the transmission application etc. of later data
Obstacle.
The present invention by normalization every layer of radar scan data, and then directly to radar detection to data point at
Reason is constructed irregular quadrilateral grid, the radar complex reflectance map graphic data with vector characteristic is obtained with this.Whole process
Reduce and calculate data volume while also avoiding redundant data, improve the acquisition efficiency of composite reflectivity graph data, generates
Radar complex reflectivity data there is vectorial property, can be applied in three-dimensional and network environment very well.
The whole world that the present invention is conducive to Radar Products data is shared, provides effective decision for the disaster reduction and prevention of meteorological disaster
Support that there is good society and economic effect；Its ability for being quickly obtained data simultaneously has good technical effect, energy
Enough shorten relevant departments for the response time of disaster.
Detailed description of the invention:
Fig. 1 is that radar complex reflectivity data obtains schematic diagram in embodiment one；
Fig. 2 is radar complex reflectance data point structure schematic diagram in embodiment one；
Fig. 3 is quad patch schematic diagram in embodiment one；
Fig. 4 is quadrilateral mesh schematic diagram in embodiment one；
Fig. 5 is the basic emissivity effect data figure of certain GPR Detection Data scanning slice in embodiment two.
Specific embodiment:
Embodiment one:
Now by taking the GPR Detection Data of somewhere as an example, a kind of method for introducing radar complex reflectivity vector figure data, tool
Body step are as follows:
1. the normalization of radar three-dimensional scan data: from original radar three-dimensional scanning reflection rate data, obtaining each scanning slice
Data, centered on radar antenna position, azimuth is j degree for building in each scanning slice taken, and the elevation angle is each scanning slice
The corresponding elevation angle, data point number are the line number evidence of any one scan line legacy data number in each scanning slice, amount to 360
Scan-line data, wherein j indicates the corresponding azimuthal angle of scan line, and the value range of j is 0≤j≤359 and j is
Integer.The new building 360 line numbers according to upper, the space interval of i-th of data point and i+1 data point is 1 kilometer,
Middle i indicate in scan line apart from radar center which detection data point, the data point in the 1≤i≤scan line is a
Number and i are integer；According to each layer scan-line data of original radar reflectivity data, interpolation calculation goes out each scanning slice azimuth and is
I-th of data point reflectivity values in the scan line of j degree, then the normalization operation of radar three-dimensional scan data finishes, normalization
Each scanning slice of radar corresponds to the next corresponding on the scan-line data of azimuth afterwards, as shown in Figure 1；
2. the building of radar complex reflectivity data point structure:
First, some data point P that minimum elevations correspond to scanning slice is projected on ground and obtains corresponding point P0, at point P
In i-th of position of the scanning slice j-th strip scan line；
Second, in each layer of radar scanning data search and point P on same orientation angle sweep line with same position
The data point of index is simultaneously compared, and assigns point P the reflectivity values of reflectivity values maximum point；
Third repeats the first and second steps, corresponds to each data point in scanning slice to minimum elevations and carry out respective handling, obtain
To radar complex reflectivity data point structure, schematic diagram is as shown in Figure 2；
3. composite reflectivity graph data constructs: in above-mentioned radar complex reflectivity data point structure, adjacent two are scanned
The two o'clock of adjacent i-th, the position i+1 is successively taken on line respectively, be sequentially connected as vertex and be built into four sides at total 4 points
Shape dough sheet, the quad patch are irregular quadrilateral dough sheet, it is to be linked in sequence by four coordinate vertices and constructed not
The quadrilateral surface of self intersection, as shown in Figure 3.And then the irregular quadrilateral dough sheet building of all consecutive points is completed, it is formed mutual
Adjacent irregular quadrilateral grid, as shown in Figure 4 to get the composite reflectivity polar plot figurate number for arriving the radar scanning layer
According to.
Embodiment two:
Irregular quadrilateral grid in combination this reflectivity vector figure data obtained for embodiment one, according to each four side
The reflectivity data on four vertex of shape dough sheet point assigns corresponding color, forms the baseis reflectivity that can characterize different echo values
Color image data.Fade effect can also be further assigned to quadrangle using the color interpolation function of computer graphics itself
Color, obtain coloured irregular quadrilateral grid to get arrive the scanning slice radar complex reflectivity polar plot figurate number
According to as shown in Figure 5.
Claims (5)
1. a kind of method of quick obtaining radar complex reflectivity vector figure data, which comprises the steps of:
1) normalization of radar three-dimensional scan data；
2) building of radar complex reflectivity data point structure；
3) composite reflectivity graph data constructs；
Wherein,
1) each layer of radar three-dimensional scan data all the normalization of radar three-dimensional scan data: is normalized to have 360
The index bed of scan-line data；After normalization, each scanning slice of radar corresponds to the next corresponding on azimuthal scan-line data；
2) building of radar complex reflectivity data point structure:
First, some data point P that minimum elevations correspond to scanning slice is projected on ground and obtains corresponding point P0, point P is in
I-th of position of the scanning slice j-th strip scan line, wherein j indicates the corresponding azimuthal angle of scan line, the value range of j
It is 0≤j≤359 and j is integer, i indicates any one a data point in the scan line, and the value range of i is 1≤i≤this sweeps
It retouches the data point number on line and i is integer；
Second, in each layer of radar scanning data search and point P on same orientation angle sweep line with same position
The data point of index is simultaneously compared, and assigns the reflectivity values of reflectivity values maximum point to point P；
Third repeats the first and second steps, corresponds to each data point in scanning slice to minimum elevations and carry out respective handling, obtain
To radar complex reflectivity data point structure；
3) composite reflectivity graph data constructs: in above-mentioned radar complex reflectivity data point structure, sweeping to adjacent two
The two o'clock for successively taking adjacent i-th, the position i+1 on line respectively is retouched, be sequentially connected as vertex and be built into one four at total 4 points
Side shape dough sheet, and then construct all quad patch forms the quadrilateral mesh that adjoins each other to get to the radar scanning layer
Composite reflectivity vector figure data.
2. the method for quick obtaining radar complex reflectivity vector figure data according to claim 1, it is characterised in that:
In step 1, it includes as follows that the original each layer of radar scanning data is all normalized to the index bed with 360 scan-line datas
Detailed process: in each scanning slice, centered on radar antenna position, with the 0 degree of building in azimuth, first scan line, often
One integer azimuth constructs a scan line, and so on, it is 359 degree that the 360th article of scan line azimuth, which is located at, building 360
Scan line；Data in each scan line pass through interpolation further according to each layer scan-line data of original radar reflectivity data
Thus 360 scan-line datas that calculating method is constructed complete the normalized of radar three-dimensional scan data.
3. the method for quick obtaining radar complex reflectivity vector figure data according to claim 2, it is characterised in that:
The data point space interval on line of each scan-line data is 1 kilometer.
4. the method for quick obtaining radar complex reflectivity vector figure data according to claim 1, it is characterised in that:
In step 3, to four vertex of obtained each quad patch, corresponding color is assigned respectively according to reflectivity data.
5. the method for quick obtaining radar complex reflectivity vector figure data according to claim 4, it is characterised in that:
Gradual manner colouration further is used to quad patch.
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| CA2234359A1 (en) * | 1998-06-08 | 1999-12-08 | Denis Barker | An easily deployable, expendable or recoverable floating radar reflective device |
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