CN103983975B - 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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- CN103983975B CN103983975B CN201410247812.6A CN201410247812A CN103983975B CN 103983975 B CN103983975 B CN 103983975B CN 201410247812 A CN201410247812 A CN 201410247812A CN 103983975 B CN103983975 B CN 103983975B
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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
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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 to one based on wind profile radar and
The air motion vertical speed detection method of cloud radar and system.
Background technology
Wind profile radar is the electromagnetic beam by launching different directions to high-altitude, receives and processes
The information that these electromagnetic beams return because atmospheric vertical structure is uneven carries out high-altitude wind field spy
A kind of remote sensing equipment surveyed.Wind profile radar utilizes Doppler effect can detect its overhead wind
To meteorological elements such as, wind speed with the situation of change of height, have detection spatial and temporal resolution high, from
Dynamicization degree advantages of higher.Wind profile radar can provide the multiple data based on wind field to produce
Product, its master data product includes radial velocity, spectrum width, signal to noise ratio, horizontal wind direction, level
The profile of the refractive index structure parameter cn2 etc. of wind speed, vertical speed and reflection atmospheric turbulance.
Wind profile radar uses Doppler technology can obtain the air motion footpath relative to radar
To speed, by carrying out the tachometric survey of many directives, can estimate under the conditions of certain supposition
Echo-signal wind direction, wind speed and vertical movement in height, thus obtain air Wind outline
Data.
As shown in Figure 1a, in the case of fair weather, the detection accuracy of wind profile radar is relatively
Height, radial velocity V that wind profile radar recordsrIt is vertical movement speed w of air；But in fall
In the case of water weather, wind profile radar is very sensitive to precipitation particles, therefore, at precipitation bar
Under part, particularly under the conditions of convective precipitation, the method for anemography of aeolian contour line radar performance can be affected.As
Shown in Fig. 1 b, in the presence of having precipitation particles, owing to its backscatter signal is frequently more than big
The scattering of gas turbulent flow, according to peak signal (Spectral in wind profile radar detection doppler spectral
Peak) method, the V recordedrIt it is precipitation particles falling speed vp, thus cause survey wind error,
Wuertz et al. (1988) analyzes the precipitation impact on wind profile radar detection accuracy,
To result be: under uniformity precipitation condition, precision is 2m/s, is 1m/s under the conditions of clear sky
The twice of precision, under precipitation condition violent with spatial variations in time, its detecting error
Reaching more than 4m/s, reason is that speed correction is unreasonable and precipitation uneven in vertical movement.
Summary of the invention
The purpose of the present invention is to propose to the inspection of a kind of air motion vertical speed based on two kinds of radars
Survey method and system, the atmospheric vertical motion that under precipitation condition, wind profile radar detects can be revised
Speed, improves the accuracy of wind profile radar atmospheric sounding motion under precipitation condition.
For reaching above-mentioned purpose, the present invention proposes a kind of air motion based on two kinds of radars and hangs down
Straight speed detection method, two kinds of radars are respectively wind profile radar and cloud radar, including following step
Rapid:
Step S1: the antenna of wind profile radar and cloud radar is directed to the sky of detecting area,
Obtain including that air motion vertical speed and precipitation particles are vertically transported by wind profile radar detection
The vertical speed spectrum of dynamic speed, and obtain precipitation particles motion vertical speed by cloud radar detection
Spectrum；
Step S2: the vertical speed spectrum and the cloud radar detection that wind profile radar detection are obtained obtain
Export to data processor to precipitation particles motion vertical normal-moveout spectrum；
Step S3: the precipitation particles motion that described data processor arrives according to cloud radar detection is hung down
Straight normal-moveout spectrum obtains precipitation particles motion vertical speed VrAnd precipitation particles motion vertical normal-moveout spectrum
Spectrum width σw, and (V in the vertical speed spectrum that wind profile radar detection is obtainedr-σw, Vr+σw)
Or (Vr-σw/ 2, Vr+σw/ 2) deciding field is detection blind zone；
Step S4: described data processor beyond described detection blind zone to described Wind outline
The vertical speed spectrum that radar detection obtains carries out detection process and obtains atmospheric vertical motion speed.
Further, in above-mentioned air motion vertical speed detection methods based on two kinds of radars,
Described step S4 specifically includes:
Described data processor detects in the vertical speed spectrum that the detection of described wind profile radar obtains
Speed-power value outside detection blind zone, chooses the speed that the power maximum of wind profile radar is corresponding
Angle value is atmospheric vertical motion speed.
Separately, the present invention also provides for a kind of air motion vertical speed based on two kinds of radars and detects system
System, including: wind profile radar, cloud radar and be connected to described wind profile radar, cloud radar
Data processor, described wind profile radar, the antenna of cloud radar be directed to the sky of detecting area,
Described wind profile radar obtains including that air motion vertical speed and precipitation particles hang down for detection
The vertical speed spectrum of straight movement velocity；
Described cloud radar obtains precipitation particles motion vertical normal-moveout spectrum for detection；
Described data processor is for the precipitation particles motion vertical speed arrived according to cloud radar detection
Degree spectrum obtains precipitation particles motion vertical speed VrAnd the spectrum of precipitation particles motion vertical normal-moveout spectrum
Wide σw, and (V in the vertical speed spectrum that wind profile radar detection is obtainedr-σw, Vr+σw) or
(Vr-σw/ 2, Vr+σw/ 2) deciding field is detection blind zone；
Described data processor is additionally operable to beyond described detection blind zone described Wind outline thunder
Reach detection obtain vertical speed spectrum carry out detection process obtain atmospheric vertical motion speed.
Further, in above-mentioned air motion vertical speed detecting systems based on two kinds of radars,
Described data processor is additionally operable to detect the vertical speed spectrum that the detection of described wind profile radar obtains
Speed-power value outside middle detection blind zone, the power maximum choosing wind profile radar is corresponding
Velocity amplitude is atmospheric vertical motion speed.
The present invention by precipitation particles motion vertical speed that cloud radar detection is arrived as correction
The reference of wind profile radar atmospheric vertical motion speed detection and localization blind zone, thus revise fall
The atmospheric vertical motion speed that under water condition, wind profile radar detects, improves precipitation condition leeward
The accuracy of profile radar atmospheric sounding motion.
Accompanying drawing explanation
Fig. 1 a is the schematic diagram of the doppler velocity spectrum of wind profile radar under fair weather；
Fig. 1 b is the schematic diagram of the doppler velocity spectrum of wind profile radar under precipitation weather；
Fig. 2 is the stream of present invention air motion based on two kinds of radars vertical speed detection method
Journey schematic diagram；
Fig. 3 a is the schematic diagram that wind profile radar detection obtains air motion vertical speed spectrum；
Wherein, A is air motion vertical speed spectral line under fair weather, and B is under precipitation weather
Air motion vertical speed spectral line；
Fig. 3 b is the signal that weather radar or cloud radar detection obtain precipitation particles vertical speed spectrum
Figure；
Wherein, C is the vertical speed spectral line of precipitation particles；
Fig. 3 c be revise after wind profile radar air motion vertical speed spectrum schematic diagram；
Fig. 4 is showing of present invention air motion vertical speed detecting system based on two kinds of radars
It is intended to.
Detailed description of the invention
Describe the preferred embodiments of the present invention below in conjunction with the accompanying drawings in detail.
Referring to Fig. 2, Fig. 2 is the inspection of present invention air motion based on two kinds of radars vertical speed
The schematic flow sheet of survey method.A kind of air motion vertical speed based on two kinds of radars of the present invention
Detection method, two kinds of radars are respectively wind profile radar and cloud radar, comprise the following steps:
Step S1: the antenna of wind profile radar and cloud radar is directed to the sky of detecting area,
Obtain including that air motion vertical speed and precipitation particles are vertically transported by wind profile radar detection
The vertical speed spectrum of dynamic speed, and obtain precipitation particles motion vertical speed by cloud radar detection
Spectrum；
Seeing also Fig. 3 a, Fig. 3 a is that to obtain air motion the fastest in wind profile radar detection
The schematic diagram of degree spectrum.In Fig. 3 a, the longitudinal axis represents the power of wind profile radar, and transverse axis represents big
Fate moves vertical speed Vr.Now, the SEQUENCING VERTICAL that under precipitation condition, wind profile radar detects
There is bigger error in movement velocity, needs to be modified.
See also the antenna detection that Fig. 3 b, Fig. 3 b is cloud radar and obtain hanging down of precipitation particles
The schematic diagram of straight normal-moveout spectrum.In Fig. 3 b, the longitudinal axis represents the power of Yun Leida, and transverse axis represents fall
Water particle motion vertical speed.Described cloud radar is wavelength from centimetre to the radar of millimeter, it is possible to
For weather radar.When the sky detection in the antenna sensing district of described cloud radar, it is only capable of
Detection water dust and precipitation particles motion vertical speed, owing to wind profile radar and cloud radar are same
One region detects simultaneously, therefore, and the precipitation particles motion vertical speed that cloud radar detection is arrived
As the reference revising the atmospheric vertical motion speed that wind profile radar detects.
Step S2: the vertical speed spectrum and the cloud radar detection that wind profile radar detection are obtained obtain
Export to data processor to precipitation particles motion vertical normal-moveout spectrum；
Step S3: the precipitation particles motion that described data processor arrives according to cloud radar detection is hung down
Straight normal-moveout spectrum obtains precipitation particles motion vertical speed VrAnd precipitation particles motion vertical normal-moveout spectrum
Spectrum width σw, and (V in the vertical speed spectrum that wind profile radar detection is obtainedr-σw, Vr+σw)
Or (Vr-σw/ 2, Vr+σw/ 2) deciding field is detection blind zone I；
Refer to Fig. 3 c, (V in described air motion vertical speed being composedr-σw, Vr+σw) or
(Vr-σw/ 2, Vr+σw/ 2) deciding field is detection blind zone I, not in detection blind zone I
Detect, thus revise the atmospheric vertical motion speed of wind profile radar detection under precipitation condition
Degree.
Step S4: described data processor beyond described detection blind zone to described Wind outline
The vertical speed spectrum that radar detection obtains carries out detection process and obtains atmospheric vertical motion speed Va。
Wherein, described step S4 specifically includes:
Described data processor detects in the vertical speed spectrum that the detection of described wind profile radar obtains
Speed-power value outside detection blind zone, chooses the speed that the power maximum of wind profile radar is corresponding
Angle value is atmospheric vertical motion speed Va。
Such as, air motion vertical speed spectrum is in the range of-20m/s to 20m/s, detection shielding
District I is (Vr-σw/ 2=2m/s, Vr+σw/ 2=4m/s), i.e. at (-20m/s, 20m/s)
In interval, described data processor is only at (-20m/s, 2m/s) and (4m/s, 20m/s)
Interval detection speed-power value, the velocity amplitude choosing the power maximum of wind profile radar corresponding is
Atmospheric vertical motion speed Va, such as, power maximum detected in speed for-2m/s place,
So-2m/s is exactly atmospheric vertical motion speed.
Referring to Fig. 4, it is the fastest that the present invention also provides for a kind of air motion based on two kinds of radars
Degree detecting system, including: wind profile radar 10, cloud radar 20 and be connected to described Wind outline
Radar 10, the data processor 30 of cloud radar 20, described wind profile radar 10, cloud radar
The antenna of 20 is directed to the sky of detecting area, and described wind profile radar 10 is wrapped for detection
Include air motion vertical speed and the vertical speed spectrum of precipitation particles vertical movement speed；Described cloud
Radar 20 obtains precipitation particles motion vertical normal-moveout spectrum for detection；Described data processor 30
For according to cloud radar detection to precipitation particles motion vertical normal-moveout spectrum obtain precipitation particles fortune
Dynamic vertical speed VrAnd the spectrum width σ of precipitation particles motion vertical normal-moveout spectrumw, and by Wind outline thunder
Reach (V in the vertical speed spectrum that detection obtainsr-σw, Vr+σw) or (Vr-σw/ 2, Vr+σw/2)
Deciding field is detection blind zone I；Described data processor 30 is additionally operable at described detection screen
Cover the vertical speed spectrum beyond district I, the detection of described wind profile radar obtained and carry out detection process
Obtain atmospheric vertical motion speed.
Described data processor is additionally operable to detect the vertical speed that the detection of described wind profile radar obtains
Degree spectrum detects the speed-power value outside the I of blind zone, chooses the power maximum of wind profile radar
Corresponding velocity amplitude is atmospheric vertical motion speed.
Such as, air motion vertical speed spectrum is in the range of-20m/s to 20m/s, detection shielding
District I is (Vr-σw/ 2=2m/s, Vr+σw/ 2=4m/s), i.e. at (-20m/s, 20m/s)
In interval, described data processor is only at (-20m/s, 2m/s) and (4m/s, 20m/s)
Interval detection speed-power value, the velocity amplitude choosing the power maximum of wind profile radar corresponding is
Atmospheric vertical motion speed Va, such as, power maximum detected in speed for-2m/s place,
So-2m/s is exactly atmospheric vertical motion speed.
Compared to prior art, the present invention is hung down by precipitation particles motion cloud radar detection arrived
Straight speed is as the reference also detection and localization blind zone of correction atmospheric vertical motion speed, thus repaiies
The atmospheric vertical motion speed that under positive precipitation condition, wind profile radar detects, improves precipitation condition
The accuracy of lower wind profile radar atmospheric sounding motion.
Here description of the invention and application is illustrative, is not wishing to limit the scope of the present invention
System is in the above-described embodiments.The deformation of embodiments disclosed herein and change are possible, right
For those skilled in the art, embodiment replaces and the various parts of equivalence
It is known.It should be appreciated by the person skilled in the art that without departing from the present invention spirit or
In the case of substitutive characteristics, the present invention can in other forms, structure, layout, ratio, with
And realize with other assembly, material and parts.In the feelings without departing from scope and spirit of the present invention
Under condition, embodiments disclosed herein can be carried out other deformation and change.
Claims (3)
1. air motion vertical speed detection methods based on two kinds of radars, two kinds of radars are respectively Wind outline thunder
Reach and cloud radar, it is characterised in that comprise the following steps:
Step S1: the antenna of wind profile radar and cloud radar is directed to the sky of detecting area, passes through wind profile radar
Detection obtains including air motion vertical speed and the vertical speed spectrum of precipitation particles vertical movement speed, and passes through
Cloud radar detection obtains precipitation particles motion vertical normal-moveout spectrum；Under precipitation condition, it is big that wind profile radar detects
There is error in gas vertical movement speed, the precipitation particles motion vertical speed that cloud radar detection is arrived is wide as revising wind
The reference of the atmospheric vertical motion speed that line radar detection is arrived；
Step S2: the vertical speed spectrum and the cloud radar detection that wind profile radar detection are obtained obtain precipitation particles motion
Vertical speed spectrum output is to data processor；
Step S3: described data processor according to cloud radar detection to precipitation particles motion vertical normal-moveout spectrum dropped
Water particle motion vertical speed VrAnd the spectrum width σ of precipitation particles motion vertical normal-moveout spectrumw, and by wind profile radar
(V in the vertical speed spectrum that detection obtainsr-σw, Vr+σw) or (Vr-σw/ 2, Vr+σw/ 2) deciding field
For detection blind zone；
Step S4: the detection of described wind profile radar is obtained beyond described detection blind zone by described data processor
Vertical speed spectrum carries out detection process and obtains atmospheric vertical motion speed；
Described data processor detects in the vertical speed spectrum that the detection of described wind profile radar obtains and detects outside blind zone
Speed-power value, the velocity amplitude choosing the power maximum of wind profile radar corresponding is atmospheric vertical motion speed.
2. an air motion vertical speed detecting system based on two kinds of radars, it is characterised in that including: wind is wide
Line radar, cloud radar and be connected to described wind profile radar, the data processor of cloud radar, described Wind outline thunder
Reach, the antenna of cloud radar is directed to the sky of detecting area, and described wind profile radar obtains including air for detection
Motion vertical speed and the vertical speed spectrum of precipitation particles vertical movement speed；
Described cloud radar obtains precipitation particles motion vertical normal-moveout spectrum for detection；
Described data processor for according to cloud radar detection to precipitation particles motion vertical normal-moveout spectrum obtain precipitation grain
Sub-motion vertical speed VrAnd the spectrum width σ of precipitation particles motion vertical normal-moveout spectrumw, and wind profile radar is detected
(V in the vertical speed spectrum obtainedr-σw, Vr+σw) or (Vr-σw/ 2, Vr+σw/ 2) deciding field is inspection
Survey blind zone；
Described data processor is additionally operable to beyond described detection blind zone hanging down that the detection of described wind profile radar obtains
Straight normal-moveout spectrum carries out detection process and obtains atmospheric vertical motion speed.
Air motion vertical speed detecting system based on two kinds of radars the most according to claim 2, its feature
Being, described data processor is additionally operable to detect in the vertical speed spectrum that the detection of described wind profile radar obtains and detects
Speed-power value outside blind zone, the velocity amplitude choosing the power maximum of wind profile radar corresponding is SEQUENCING VERTICAL
Movement velocity.
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| CN106556836B (en) * | 2016-10-18 | 2019-04-16 | 北京无线电测量研究所 | A kind of wind profile radar has self-adaptive detection system and method for the precipitation without precipitation |
| CN109324328B (en) * | 2018-12-17 | 2022-12-20 | 北京无线电测量研究所 | Method and device for extracting wind profile radar vertical beam turbulence spectrum in rainfall |
| CN109614579B (en) * | 2018-12-24 | 2022-05-17 | 雷象科技（北京）有限公司 | Phased array weather radar maximum value signal extraction method |
| CN109828276B (en) * | 2019-03-06 | 2023-04-21 | 南京微麦科斯电子科技有限责任公司 | Wind profile radar based on interference algorithm |
| CN112946658B (en) * | 2021-02-03 | 2022-12-02 | 中国气象科学研究院 | Method and device for acquiring vertical movement speed of atmosphere |
| CN113064130B (en) * | 2021-03-17 | 2023-02-28 | 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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| US20080169975A1 (en) * | 2007-01-12 | 2008-07-17 | Young Paul Yee | Process for generating spatially continuous wind profiles from wind profiler measurements |
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