CN103983975A - Method and system for detecting atmospheric vertical movement speed based on two types of radars - Google Patents
Method and system for detecting atmospheric vertical movement speed based on two types of radars Download PDFInfo
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- CN103983975A CN103983975A CN201410247812.6A CN201410247812A CN103983975A CN 103983975 A CN103983975 A CN 103983975A CN 201410247812 A CN201410247812 A CN 201410247812A CN 103983975 A CN103983975 A CN 103983975A
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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
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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
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a method and a system for detecting an atmospheric vertical movement speed based on two types of radars. The method comprises the following steps: step S1. detecting through a wind profile radar to obtain atmospheric vertical movement speed spectrum data, and detecting through a cloud radar to obtain rainfall particle vertical movement speed spectrum data; step S2. outputting the detected atmospheric vertical movement speed spectrum data and the rainfall particle vertical movement speed spectrum data to a data processor; step S3. locating a zone (Vr-Sigmaw, Vr+Sigmaw) or a zone (Vr-Sigmaw/2, Vr+Sigmaw/2) in an atmospheric vertical movement speed spectrum to be a detection shielding area by the data processor; and S4. detecting and processing a wind profile radar vertical speed spectrum by the data processor outside the detection shielding area to obtain the atmospheric vertical movement speed. By adopting the method and the system, the atmospheric vertical movement speed detected by the wind profile radar under the rainfall conditions is corrected, and thus the accuracy of detecting the atmospheric movement by the wind profile radar under the rainfall conditions is improved.
Description
Technical field
The present invention relates to atmospheric science technical field, particularly a kind of air motion vertical speed detection method and system based on wind profile radar and cloud radar.
Background technology
Wind profile radar is by the electromagnetic beam to high-altitude transmitting different directions, receives and process a kind of remote sensing equipment that these electromagnetic beams carry out high-altitude wind field detection because of the inhomogeneous information of returning of SEQUENCING VERTICAL structure.Wind profile radar utilizes Doppler effect can survey the meteorological elements such as its overhead wind direction, wind speed with the situation of change of height, has to survey that spatial and temporal resolution is high, automaticity advantages of higher.Wind profile radar can provide take wind field and is main several data product, and its master data product comprises the profile of the refractive index structure parameter cn2 of radial velocity, spectrum width, signal to noise ratio (S/N ratio), horizontal wind direction, horizontal wind speed, vertical speed and reflection atmospheric turbulence etc.
Wind profile radar adopts Doppler technology can obtain air motion with respect to the radial velocity of radar, by carrying out the velocity survey of many directives, under certain assumed conditions, can estimate echoed signal wind direction, wind speed and vertical movement in height, thereby obtain atmosphere wind profile data.
As shown in Figure 1a, in fine fair-weather situation, the detection accuracy of wind profile radar is higher, the radial velocity V that wind profile radar records
rthe vertical movement speed w of atmosphere; But the in the situation that of precipitation weather, wind profile radar is very responsive to precipitation particles, therefore, under precipitation condition, particularly under convective precipitation condition, the method for anemography of aeolian contour line radar performance can be affected.As shown in Figure 1 b, when having precipitation particles to exist, because its backscatter signal is usually greater than the scattering of atmospheric turbulence, according to wind profile radar, detect the method for peak signal (Spectral Peak) in doppler spectral, the V recording
rprecipitation particles falling speed v
pthereby cause survey wind error, the people such as Wuertz (1988) have analyzed the impact of precipitation on wind profile radar detection accuracy, the result obtaining is: under homogeneity precipitation condition, precision is 2m/s, it is the twice of the precision of 1m/s under clear sky condition, in time with the violent precipitation condition of spatial variations under, more than its detecting error reaches 4m/s, reason is the inhomogeneous of the unreasonable and precipitation of vertical movement speed correction.
Summary of the invention
The object of the invention is to propose a kind of air motion vertical speed detection method and system based on two kinds of radars, can revise the atmospheric vertical motion speed that under precipitation condition, wind profile radar detects, improve the accuracy of wind profile radar atmospheric sounding motion under precipitation condition.
For achieving the above object, the present invention proposes a kind of air motion vertical speed detection method based on two kinds of radars, two kinds of radars are respectively wind profile radar and cloud radar, comprise the following steps:
Step S1: by the sky in the equal sensing of the antenna district of wind profile radar and cloud radar, by wind profile radar, survey and obtain comprising that the vertical speed of air motion vertical speed and precipitation particles vertical movement speed composes, and obtain precipitation particles motion vertical velocity spectrum by cloud radar detection;
Step S2: the vertical speed spectrum that wind profile radar detection is obtained and cloud radar detection obtain precipitation particles motion vertical velocity spectrum and export data processor to;
Step S3: described data processor according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone;
Step S4: the vertical speed spectrum that described data processor obtains described wind profile radar detection in addition in described detection shadow zone is carried out Check processing and obtained atmospheric vertical motion speed.
Further, in the above-mentioned air motion vertical speed detection method based on two kinds of radars, described step S4 specifically comprises:
Described data processor detects described wind profile radar and surveys in the vertical speed spectrum obtaining and detect the speed-power value outside shadow zone, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed.
Separately, the present invention also provides a kind of air motion vertical speed detection system based on two kinds of radars, comprise: wind profile radar, cloud radar and be connected in the data processor of described wind profile radar, cloud radar, the sky in the equal sensing of the antenna district of described wind profile radar, cloud radar, described wind profile radar is for surveying the vertical speed spectrum that obtains comprising air motion vertical speed and precipitation particles vertical movement speed;
Described cloud radar obtains precipitation particles motion vertical velocity spectrum for surveying;
Described data processor for according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone;
Described data processor also carries out Check processing for the vertical speed spectrum in addition described wind profile radar detection being obtained in described detection shadow zone and obtains atmospheric vertical motion speed.
Further, in the above-mentioned air motion vertical speed detection system based on two kinds of radars, described data processor is also surveyed in the vertical speed spectrum obtaining and is detected the speed-power value outside shadow zone for detection of described wind profile radar, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed.
The present invention by precipitation particles motion vertical speed that cloud radar detection is arrived as reference the detection and localization shadow zone of revising wind profile radar atmospheric vertical motion speed, thereby the atmospheric vertical motion speed that under correction precipitation condition, wind profile radar detects, improves the accuracy that under precipitation condition, wind profile radar atmospheric sounding moves.
Accompanying drawing explanation
Fig. 1 a is the schematic diagram of the doppler velocity spectrum of wind profile radar under fine weather;
Fig. 1 b is the schematic diagram of the doppler velocity spectrum of wind profile radar under precipitation weather;
Fig. 2 is the schematic flow sheet that the present invention is based on the air motion vertical speed detection method of two kinds of radars;
Fig. 3 a is that wind profile radar is surveyed the schematic diagram that obtains air motion vertical speed spectrum;
Wherein, A is air motion vertical speed spectral line under fine weather, and B is air motion vertical speed spectral line under precipitation weather;
Fig. 3 b is the schematic diagram that weather radar or cloud radar detection obtain precipitation particles vertical speed spectrum;
Wherein, the vertical speed spectral line that C is precipitation particles;
Fig. 3 c is the schematic diagram of wind profile radar air motion vertical speed spectrum after revising;
Fig. 4 is the schematic diagram that the present invention is based on the air motion vertical speed detection system of two kinds of radars.
Embodiment
Below in conjunction with accompanying drawing, describe the preferred embodiments of the present invention in detail.
Refer to Fig. 2, Fig. 2 is the schematic flow sheet that the present invention is based on the air motion vertical speed detection method of two kinds of radars.A kind of air motion vertical speed detection method based on two kinds of radars of the present invention, two kinds of radars are respectively wind profile radar and cloud radar, comprise the following steps:
Step S1: by the sky in the equal sensing of the antenna district of wind profile radar and cloud radar, by wind profile radar, survey and obtain comprising that the vertical speed of air motion vertical speed and precipitation particles vertical movement speed composes, and obtain precipitation particles motion vertical velocity spectrum by cloud radar detection;
See also Fig. 3 a, Fig. 3 a is that wind profile radar is surveyed the schematic diagram that obtains air motion vertical speed spectrum.In Fig. 3 a, the longitudinal axis represents the power of wind profile radar, and transverse axis represents air motion vertical speed V
r.Now, there is larger error in the atmospheric vertical motion speed that under precipitation condition, wind profile radar detects, need to revise.
See also Fig. 3 b, Fig. 3 b is the schematic diagram that the antenna of cloud radar is surveyed the vertical speed spectrum that obtains precipitation particles.In Fig. 3 b, the longitudinal axis represents the power of Yun Leida, and transverse axis represents precipitation particles motion vertical speed.Described cloud radar be wavelength from centimetre radar to millimeter, also can be weather radar.When the sky of the antenna direction detecting area of described cloud radar is surveyed, it only can survey water dust and precipitation particles motion vertical speed, because wind profile radar and cloud radar are to survey at the same area simultaneously, therefore, cloud radar detection to precipitation particles motion vertical speed as the reference of revising the atmospheric vertical motion speed that wind profile radar detects.
Step S2: the vertical speed spectrum that wind profile radar detection is obtained and cloud radar detection obtain precipitation particles motion vertical velocity spectrum and export data processor to;
Step S3: described data processor according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone I;
Refer to Fig. 3 c, by (V in described air motion vertical speed spectrum
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone I, in detecting shadow zone I, does not detect, thereby revises the atmospheric vertical motion speed that under precipitation condition, wind profile radar is surveyed.
Step S4: the vertical speed spectrum that described data processor obtains described wind profile radar detection in addition in described detection shadow zone is carried out Check processing and obtained atmospheric vertical motion speed V
a.
Wherein, described step S4 specifically comprises:
Described data processor detects described wind profile radar and surveys in the vertical speed spectrum obtaining and detect the speed-power value outside shadow zone, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed V
a.
For example, the scope of air motion vertical speed spectrum be-and 20m/s is to 20m/s, and detection shadow zone I is (V
r-σ
w/ 2=2m/s, V
r+ σ
w/ 2=4m/s), in (20m/s, 20m/s) interval, described data processor is only at (20m/s, 2m/s) and (4m/s, 20m/s) interval detection speed performance number, velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed V
a, for example, in speed, power maximal value being detected for-2m/s place, so-2m/s is exactly atmospheric vertical motion speed.
Refer to Fig. 4, the present invention also provides a kind of air motion vertical speed detection system based on two kinds of radars, comprise: wind profile radar 10, cloud radar 20 and be connected in the data processor 30 of described wind profile radar 10, cloud radar 20, the sky in the equal sensing of the antenna district of described wind profile radar 10, cloud radar 20, described wind profile radar 10 is for surveying the vertical speed spectrum that obtains comprising air motion vertical speed and precipitation particles vertical movement speed; Described cloud radar 20 obtains precipitation particles motion vertical velocity spectrum for surveying; Described data processor 30 for according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone I; Described data processor 30 also carries out Check processing for the vertical speed spectrum beyond described detection shadow zone I, described wind profile radar detection being obtained and obtains atmospheric vertical motion speed.
Described data processor is also surveyed in the vertical speed spectrum obtaining and is detected the speed-power value outside the I of shadow zone for detection of described wind profile radar, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed.
For example, the scope of air motion vertical speed spectrum be-and 20m/s is to 20m/s, and detection shadow zone I is (V
r-σ
w/ 2=2m/s, V
r+ σ
w/ 2=4m/s), in (20m/s, 20m/s) interval, described data processor is only at (20m/s, 2m/s) and (4m/s, 20m/s) interval detection speed performance number, velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed V
a, for example, in speed, power maximal value being detected for-2m/s place, so-2m/s is exactly atmospheric vertical motion speed.
Than prior art, the present invention by precipitation particles motion vertical speed that cloud radar detection is arrived as reference the detection and localization shadow zone of revising atmospheric vertical motion speed, thereby the atmospheric vertical motion speed that under correction precipitation condition, wind profile radar detects, improves the accuracy that under precipitation condition, wind profile radar atmospheric sounding moves.
Here description of the invention and application is illustrative, not wants by scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change is possible, and for those those of ordinary skill in the art, the various parts of the replacement of embodiment and equivalence are known.Those skilled in the art are noted that in the situation that not departing from spirit of the present invention or essential characteristic, and the present invention can be with other form, structure, layout, ratio, and realizes with other assembly, material and parts.In the situation that not departing from the scope of the invention and spirit, can carry out other distortion and change to disclosed embodiment here.
Claims (4)
1. the air motion vertical speed detection method based on two kinds of radars, two kinds of radars are respectively wind profile radar and cloud radar, it is characterized in that, comprise the following steps:
Step S1: by the sky in the equal sensing of the antenna district of wind profile radar and cloud radar, by wind profile radar, survey and obtain comprising that the vertical speed of air motion vertical speed and precipitation particles vertical movement speed composes, and obtain precipitation particles motion vertical velocity spectrum by cloud radar detection;
Step S2: the vertical speed spectrum that wind profile radar detection is obtained and cloud radar detection obtain precipitation particles motion vertical velocity spectrum and export data processor to;
Step S3: described data processor according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone;
Step S4: the vertical speed spectrum that described data processor obtains described wind profile radar detection in addition in described detection shadow zone is carried out Check processing and obtained atmospheric vertical motion speed.
2. the air motion vertical speed detection method based on two kinds of radars according to claim 1, is characterized in that, described step S4 specifically comprises:
Described data processor detects described wind profile radar and surveys in the vertical speed spectrum obtaining and detect the speed-power value outside shadow zone, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed.
3. the air motion vertical speed detection system based on two kinds of radars, it is characterized in that, comprise: wind profile radar, cloud radar and be connected in the data processor of described wind profile radar, cloud radar, the sky in the equal sensing of the antenna district of described wind profile radar, cloud radar, described wind profile radar is for surveying the vertical speed spectrum that obtains comprising air motion vertical speed and precipitation particles vertical movement speed;
Described cloud radar obtains precipitation particles motion vertical velocity spectrum for surveying;
Described data processor for according to cloud radar detection to precipitation particles motion vertical velocity spectrum obtain precipitation particles motion vertical speed V
rand the spectrum width σ of precipitation particles motion vertical velocity spectrum
w, and wind profile radar is surveyed to (V in the vertical speed spectrum obtaining
r-σ
w, V
r+ σ
w) or (V
r-σ
w/ 2, V
r+ σ
w/ 2) interval is orientated as and is detected shadow zone;
Described data processor also carries out Check processing for the vertical speed spectrum in addition described wind profile radar detection being obtained in described detection shadow zone and obtains atmospheric vertical motion speed.
4. the air motion vertical speed detection system based on two kinds of radars according to claim 3, it is characterized in that, described data processor is also surveyed in the vertical speed spectrum obtaining and is detected the speed-power value outside shadow zone for detection of described wind profile radar, and velocity amplitude corresponding to power maximal value of choosing wind profile radar is atmospheric vertical motion speed.
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| CN109614579A (en) * | 2018-12-24 | 2019-04-12 | 雷象科技（北京）有限公司 | Phased array weather radar maximum value extracts signal method |
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| CN109828276A (en) * | 2019-03-06 | 2019-05-31 | 南京微麦科斯电子科技有限责任公司 | A kind of wind profile radar based on Non-Interference Algorithm |
| CN112946658A (en) * | 2021-02-03 | 2021-06-11 | 中国气象科学研究院 | Method and device for acquiring vertical movement speed of atmosphere |
| CN113064130A (en) * | 2021-03-17 | 2021-07-02 | 中国气象科学研究院 | Method, device, storage medium and program product for determining particle spectral distribution |
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|---|---|
| CN103983975B (en) | 2017-01-11 |
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