CN110824480A - Method for selecting effective elevation angle of radar under complex terrain - Google Patents
Method for selecting effective elevation angle of radar under complex terrain Download PDFInfo
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- CN110824480A CN110824480A CN201911030292.2A CN201911030292A CN110824480A CN 110824480 A CN110824480 A CN 110824480A CN 201911030292 A CN201911030292 A CN 201911030292A CN 110824480 A CN110824480 A CN 110824480A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012216 screening Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000010187 selection method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012876 topography Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/95—Radar or analogous systems specially adapted for specific applications for meteorological use
-
- 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
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4026—Antenna boresight
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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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4026—Antenna boresight
- G01S7/4034—Antenna boresight in elevation, i.e. in the vertical plane
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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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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a method for selecting an effective elevation angle of a radar under a complex terrain, which belongs to the field of weather monitoring and comprises the steps of firstly calculating the earth surface distance between each elevation grid point and the radar; then, acquiring a grid point range swept by the radar by utilizing the sweep range of the radar; calculating a ground surface included angle formed by each grid point and the radar in the grid point range by using the ground surface distance; finally, obtaining the effective elevation angle of the radar by utilizing the ground surface included angle; the method can select the effective elevation angle of the radar under the complex terrain, and the selection method is simple, convenient, quick and efficient.
Description
Technical Field
The invention relates to the technical field of climate monitoring, in particular to a method for selecting an effective elevation angle of a radar under a complex terrain.
Background
At present, the method of forecasting weather by using data collected by radar is a commonly adopted means at present; the domestic topography is complex and changeable, the topography is fluctuant, mountains are continuous, rivers run, and meanwhile, the climate types are also complex and diversified; due to different terrains, the elevation angle selected by the radar is different, and the selection of the radar elevation angle is a ubiquitous problem and is also an important factor influencing radar weather forecast.
Disclosure of Invention
The invention aims to: the invention provides a method for selecting an effective elevation angle of a radar under a complex terrain, which can select the effective elevation angle of the radar under the condition of complex and variable terrain.
The technical scheme adopted by the invention is as follows:
a method for selecting effective elevation angles of radars under complex terrains comprises the following steps for each radar:
step 1: calculating the earth surface distance between each elevation grid point and the radar;
step 2: acquiring a grid point range scanned by the radar by using the scanning range of the radar;
and step 3: calculating a ground surface included angle formed by each grid point and a radar in the grid point range by using the ground surface distance;
and 4, step 4: and obtaining the effective elevation angle of the radar by utilizing the ground surface included angle.
Further, the spatial resolution of the elevation grid points is 30 × 30 m.
Further, in the step 1, the earth surface distance is calculated by adopting longitude and latitude data of the center point of the grid point and longitude and latitude data of the radar.
Further, in the step 4, the specific steps of obtaining the effective elevation angle by using the earth surface included angle are as follows:
step 41: aiming at any grid point a in the grid points, screening out all grid points within a range of +/-X degrees of the earth surface included angle corresponding to the grid point a to serve as a data set A;
step 42: further screening the grid points in the data set A to obtain grid points with the earth surface distance not greater than the earth surface distance between the grid points a and the radar, and using the grid points as a data set B;
step 43: for the earth surface included angle corresponding to the grid point in the data set B, taking the maximum value of the earth surface included angle as the elevation angle of the radar scanning grid point a;
step 44: and obtaining the effective elevation angle of the radar scanning the lattice point a according to the elevation angle and the actual elevation angle of the radar.
Further, X is 0.5.
Further, the actual elevation angle of the radar is: 0.5, 1.5, 2.4, 3.4, 4.3, 6.0.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the method can select the effective elevation angle of the radar under the complex terrain, and the selection method is simple, convenient, quick and efficient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is an actual elevation map of the coverage area of the fountain radar;
FIG. 3 is a diagram of the radar elevation angle selection of the coverage area of the fountain radar;
FIG. 4 is an actual elevation map of coverage area of tension wave radar;
FIG. 5 is a view of elevation angle selection of a radar in coverage area of Zhangye radar;
FIG. 6 is an actual elevation map of the Lanzhou radar coverage area;
FIG. 7 is a chart of radar elevation selection for Lanzhou radar coverage area;
FIG. 8 is a schematic view of the actual elevation of the coverage area of the southeast radar;
FIG. 9 is a diagram of elevation selection of radar in a coverage area of a southeast radar;
FIG. 10 is a real elevation map of the coverage area of the Longnan radar;
FIG. 11 is a diagram of elevation angle selection for a radar in the coverage area of the Longnan radar;
FIG. 12 is an actual elevation map of a radar coverage area;
FIG. 13 is a diagram of radar elevation angle selection for a coverage area of a space-level radar;
FIG. 14 is an actual elevation map of a Qingyang radar coverage area;
fig. 15 is a radar elevation angle selection diagram of a celebration radar coverage area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Examples
The present embodiment takes the province of Gansu as an example, and describes a method for selecting an effective elevation angle of a radar in Gansu.
In the northwest region of China in Gansu, Dongtong Shaanxi, south aerial view Sichuan, Qinghai, Xida Xinjiang, North Jiening Ningxia and inner Mongolia, the northwest end is bordered by Mongolian countries, the interior is an intersection zone of three highlands of loess plateau, Qinghai-Tibet plateau and inner Mongolian plateau, the climate types are various, the four climatic types comprise subtropical mony season climate, temperate continental climate, high mountain plateau climate and the like from south to north, the area is more than 39 million square kilometers, and the terrain is complex and long and narrow. The terrain is mainly mountains and plateaus, the altitude is mostly over 1000 meters, and the surrounding is surrounded by mountains and sharp mountains. In the north, there are six mountains, the Heli mountain and the Longsho mountain; dong is Minshan, Qinling and meridian Ling; west grafting of Aljinshan; and Qilian mountain; south earth green mud mountain. The topography is very complicated due to the fluctuating terrain in the country, continuous mountains and running rivers.
According to the longitude and latitude and the altitude of the central point (more than 6000 pieces of total grid point data) divided by grid points with 30 × 30 spatial resolution in the whole world of Gansu province, the selection of the forecast radar elevation of each elevation grid point in each radar range when rainfall is forecasted is calculated based on the longitude and latitude, the altitude and the scanning range of 7 radars (Jiayuguan, Zhangye, Lanzhou, Gannan, Longnan, Tianshui and Xifeng) in Gansu province.
Step 1: calculating the earth surface distance between each elevation lattice point and the radar, wherein the lattice points are square, so that the center points of the lattice points are used as the basis for calculation;
step 2: acquiring a grid point range scanned by the radar by using the scanning range of the radar;
and step 3: calculating a ground surface included angle formed by each grid point and a radar in the grid point range by using the ground surface distance; first, calculating cos value of the earth surface included angle, thereby obtaining the final earth surface included angle.
And 4, step 4: and obtaining the effective elevation angle of the radar by utilizing the ground surface included angle.
Step 41: screening all grid points within a range of +/-0.5 degrees of the earth surface included angle corresponding to any grid point a in the grid points as a data set A;
step 42: further screening the grid points in the data set A to obtain grid points with the earth surface distance not greater than the earth surface distance between the grid points a and the radar, and using the grid points as a data set B;
step 43: for the earth surface included angle corresponding to the grid point in the data set B, taking the maximum value of the earth surface included angle as the elevation angle of the radar scanning grid point a;
step 44: and obtaining the effective elevation angle of the radar scanning the lattice point a according to the elevation angle and the actual elevation angle of the radar, wherein the actual elevation angle of the radar is as follows: 0.5, 1.5, 2.4, 3.4, 4.3, 6.0, so the closest elevation is taken as the actual effective elevation for that grid point.
(1) Selecting a 100KM area covered by a spring radar station (Z9937) to perform radar elevation angle selection calculation based on DEM elevation to obtain an actual elevation map of the spring radar covered area shown in figure 2; FIG. 3 is a diagram of the radar elevation angle selection of the coverage area of the fountain radar;
(2) selecting a 100KM area covered by a Zhang radar station (Z9936) to perform radar elevation selection calculation based on DEM elevation to obtain an actual elevation map of the Zhang radar covered area shown in figure 4; FIG. 5 is a view of elevation angle selection of a radar in coverage area of Zhangye radar;
(3) selecting a 100KM area covered by a Lanzhou radar station (Z9931) to perform radar elevation angle selection calculation based on DEM elevation to obtain an actual elevation map of the Lanzhou radar coverage area shown in figure 6; FIG. 7 is a chart of radar elevation selection for Lanzhou radar coverage area;
(4) selecting a 100KM area covered by a southeast radar station (Z9941) to perform radar elevation angle selection calculation based on DEM elevation, and obtaining an actual elevation map of the area covered by the southeast radar shown in FIG. 8; FIG. 9 is a diagram of elevation selection of radar in a coverage area of a southeast radar;
(5) selecting a 100KM area covered by a Longnan radar station (Z9939) to perform radar elevation angle selection calculation based on DEM elevation, and obtaining an actual elevation map of the coverage area of the Longnan radar as shown in a diagram 10; FIG. 11 is a diagram of elevation angle selection for a radar in the coverage area of the Longnan radar;
(6) selecting a 100KM area covered by a sky and water radar station (Z9938) to perform radar elevation angle selection calculation based on DEM elevation, and obtaining an actual elevation map of the area covered by the sky and water radar as shown in figure 12; FIG. 13 is a diagram of radar elevation angle selection for a coverage area of a space-level radar;
(7) selecting a 100KM area covered by a Qingyang radar station (Z9934) to perform radar elevation angle selection calculation based on DEM elevation, and obtaining an actual elevation map of the Qingyang radar covered area shown in figure 14; fig. 15 is a radar elevation angle selection diagram of a celebration radar coverage area.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A method for selecting an effective elevation angle of a radar under a complex terrain is characterized by comprising the following steps: for each radar, the method comprises the following steps:
step 1: calculating the earth surface distance between each elevation grid point and the radar;
step 2: acquiring a grid point range scanned by the radar by using the scanning range of the radar;
and step 3: calculating a ground surface included angle formed by each grid point and a radar in the grid point range by using the ground surface distance;
and 4, step 4: and obtaining the effective elevation angle of the radar by utilizing the ground surface included angle.
2. The method for selecting the effective elevation angle of the radar under the complex terrain according to claim 1, wherein: the spatial resolution of the elevation grid points is 30 x 30 m.
3. The method for selecting the effective elevation angle of the radar under the complex terrain according to claim 1, wherein: in the step 1, the earth surface distance is calculated by adopting longitude and latitude data of the central point of the grid point and longitude and latitude data of the radar.
4. The method for selecting the effective elevation angle of the radar under the complex terrain according to claim 1, wherein: in the step 4, the specific steps of obtaining the effective elevation angle by using the earth surface included angle are as follows:
step 41: aiming at any grid point a in the grid points, screening out all grid points within a range of +/-X degrees of the earth surface included angle corresponding to the grid point a to serve as a data set A;
step 42: further screening the grid points in the data set A to obtain grid points with the earth surface distance not greater than the earth surface distance between the grid points a and the radar, and using the grid points as a data set B;
step 43: for the earth surface included angle corresponding to the grid point in the data set B, taking the maximum value of the earth surface included angle as the elevation angle of the radar scanning grid point a;
step 44: and obtaining the effective elevation angle of the radar scanning the lattice point a according to the elevation angle and the actual elevation angle of the radar.
5. The method for selecting the effective elevation angle of the radar under the complex terrain according to claim 4, wherein: and X is 0.5.
6. The method for selecting the effective elevation angle of the radar under the complex terrain according to claim 4, wherein: the actual elevation angle of the radar is: 0.5, 1.5, 2.4, 3.4, 4.3, 6.0.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7880668B1 (en) * | 2008-12-08 | 2011-02-01 | Lockheed Martin Corproation | Automated radar elevation angle configuration |
| CN105842676A (en) * | 2016-06-16 | 2016-08-10 | 成都中科合迅科技有限公司 | Radar blind area analysis method and device |
| CN108549059A (en) * | 2018-03-26 | 2018-09-18 | 西安电子科技大学 | A kind of low target elevation estimate method under MODEL OVER COMPLEX TOPOGRAPHY |
-
2019
- 2019-10-28 CN CN201911030292.2A patent/CN110824480A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7880668B1 (en) * | 2008-12-08 | 2011-02-01 | Lockheed Martin Corproation | Automated radar elevation angle configuration |
| CN105842676A (en) * | 2016-06-16 | 2016-08-10 | 成都中科合迅科技有限公司 | Radar blind area analysis method and device |
| CN108549059A (en) * | 2018-03-26 | 2018-09-18 | 西安电子科技大学 | A kind of low target elevation estimate method under MODEL OVER COMPLEX TOPOGRAPHY |
Non-Patent Citations (2)
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| 万玉发等: "多普勒天气雷达站址视程的客观分析技术", 《应用气象学报》 * |
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Application publication date: 20200221 |