CN105487076A - Millimeter-wave cloud radar dense fog visibility inversion method and system - Google Patents
Millimeter-wave cloud radar dense fog visibility inversion method and system Download PDFInfo
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- CN105487076A CN105487076A CN201610009772.0A CN201610009772A CN105487076A CN 105487076 A CN105487076 A CN 105487076A CN 201610009772 A CN201610009772 A CN 201610009772A CN 105487076 A CN105487076 A CN 105487076A
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Abstract
The invention relates to a millimeter-wave cloud radar dense fog visibility inversion method and system. The method includes the following steps that: a millimeter-wave cloud radar is controlled to carry out meteorological target detection according to preset work parameters and preset scanning modes and generate radar echo signals; clutters and echo singular points are removed from the radar echo signals, so that dense fog echo signals can be preprocessed, and preprocessed data are outputted; the reprocessed data are saved; the saved reprocessed data are read, and dense fog visibility inversion is performed on the reprocessed data, and the distribution of visibility in a horizontal direction and the distribution of visibility in a vertical direction can be obtained. With the millimeter-wave cloud radar dense fog visibility inversion method and system adopted, the problem of incapability of effectively obtaining the distribution of dense fog space visibility can be solved.
Description
Technical field
The present invention relates to Radar Technology field, particularly relate to a kind of millimeter wave cloud radar dense fog visibility inversion method and system.
Background technology
Visibility (Visibility) is the amount by human observers's quantitative predication first defined in order to meteorological object, horizontal visibility in meteorology refers to that horizontal field of view angle is about the ground black objects thing of 0.5 °-5 °, by day under cloudless air background condition, observer can recognize extremely reluctantly (or just can not recognize) goes out the distance of this object.It is a physical quantity of atmosphere of scale human eye visual range, embody the ability that observer recognizes object from background objects, and mainly in air, particle light scattering causes.In meteorology, visibility refers to that object can by the ultimate range clearly identified.Measure visibility moderate and can use ocular estimate, also can use atmospheric transmission instrument or laser visibility automatic measuring instrument etc.
But it is all point data that atmospheric transmission instrument and laser visibility meter are measured, and represents overall visibility by fraction point data, cannot reflect dense fog space distribution situation effectively comprehensively.Range estimation rule can carry out personal error due to the measuring tape of different observer, and ocular estimate depends on marker, larger by place restriction.Present stage is also temporarily without the method for effectively detection dense fog global space visibility distribution.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, provides a kind of millimeter wave cloud radar dense fog visibility inversion method and system, solves the problem that effectively cannot obtain the visibility distribution of dense fog space.The technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of millimeter wave cloud radar dense fog visibility inversion method, comprises the following steps:
Step 1: control millimeter wave cloud radar and carry out meteorological target detection by default running parameter and default scan pattern, and produce radar echo signal;
Step 2: carry out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal to described radar echo signal, and export pretreated data;
Step 3: described pretreated data are preserved;
Step 4: the described pretreated data of reading and saving, and carry out the inverting of dense fog visibility to described pretreated data, obtains visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
The invention has the beneficial effects as follows: millimeter wave cloud radar can be utilized to have carried out the inverting of dense fog visibility thus effectively obtained the visibility distribution of dense fog space; Take full advantage of the advantage that millimere-wave band radar is strong to weak signal target particle detection ability, enrich the data product type of millimeter wave cloud detection radar.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described step 1 is implemented as:
Step 1.1: control millimeter wave cloud radar and carry out meteorological target detection by the sPPI scan pattern of the default angle of pitch, and produce the first radar echo signal;
Step 1.2: control millimeter wave cloud radar and carry out meteorological target detection by the RHI scan pattern at pre-configured orientation angle, and produce the second radar echo signal.
Adopt the beneficial effect of above-mentioned further scheme to be, by two kinds of scan patterns circulations, by dense fog visibility in space distribution situation by radar reflection echo record.
Further, described step 2 is implemented as:
Step 2.1: described first radar echo signal and described second radar echo signal are carried out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data.
The beneficial effect of above-mentioned further scheme is adopted to be: to utilize dense fog self property, have chosen effective judgment basis, dense fog echo and clutter are distinguished, obtain the effect of purification echo.
Further, described step 2.1 is implemented as:
Step 2.1.1: arrange the threshold value of described linear depolarization ratio data for-40dB, choose lower than the reflectivity factor data on the correspondence position of the linear depolarization ratio data of described threshold value, wherein, described correspondence position is same range bin and same position angle;
Step 2.1.2: according to reflectivity factor data area, the predetermined threshold value of reflectivity factor data is set, does not belong to the point of dense fog echo to remove numerical value in described reflectivity factor data, wherein, described predetermined threshold value minimum is not less than-70dBZ, and mxm. is not higher than-10dBZ;
Step 2.1.3: use the filter window of 3 × 1 by position angle sequence, and to the smoothing filtering of reflectivity factor data, obtain associated parameter data.
Adopt the beneficial effect of above-mentioned further scheme: for the problem that dense fog echo is lower and clutter is close, according to droplet feature, selected characteristic division amount, rejects ground clutter.Simultaneously according to the even feature of dense fog small scale, choose Smooth scheme, reject radar return singular point.
Further, described step 2.1.3 is implemented as:
Step 2.1.3.1: set scan control module to carry out total the points of measurement that meteorological target detection obtains is as M, and total iterations is N;
Step 2.1.3.2: from 1, for the i-th point, calculates the average m of the reflectivity factor data of 3 observation stations around it;
Step 2.1.3.3: if the difference >=5dBZ of the absolute value of observation station described in one of them and described average m, then remove described i-th point, otherwise retain described i-th point;
Step 2.1.3.4: the next point calculating described observation station, until calculate M;
Step 2.1.3.5: carry out next iteration, until iterate to times N.
Adopt the beneficial effect of above-mentioned further scheme to be utilize in dense fog small scale the feature that is evenly distributed, obtain the method rejecting radar singular point.
Further, described step 4 is implemented as:
Step 4.1: for the reflectivity factor data of described sPPI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each position angle in described sPPI scan pattern data and each range bin, obtain visibility in level orientation distribution situation;
Step 4.2: for the reflectivity factor data of described RHI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each angle of pitch in described RHI scan pattern data and each range bin, obtain visibility in vertical orientations distribution situation.
The beneficial effect of above-mentioned further scheme is adopted to be: to utilize radar return data, carried out the inverting of dense fog visibility, obtain dense fog visibility data; Utilize the formula of radar reflectivity factor inverting visibility, radar can be obtained according to formula and often locate echo place state of visibility.
Another technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of millimeter wave cloud radar dense fog visibility Inversion System, comprising:
Scan control module, carries out meteorological target detection for controlling millimeter wave cloud radar by default running parameter and default scan pattern, and the radar echo signal of generation is transferred to signal processing module;
Signal processing module, rejects clutter and echo singular point to obtain the pre-service of dense fog echoed signal for carrying out described radar echo signal, and exports pretreated data;
Main control module, preserves for the described pretreated data exported by described signal processing module;
Data inversion module, for the described pretreated data of reading and saving in described main control module, and the inverting of dense fog visibility is carried out to described pretreated data, obtain visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
The invention has the beneficial effects as follows: millimeter wave cloud radar can be utilized to have carried out the inverting of dense fog visibility thus effectively obtained the visibility distribution of dense fog space; Take full advantage of the advantage that millimere-wave band radar is strong to weak signal target particle detection ability, enrich the data product type of millimeter wave cloud detection radar.
Further, described scan control module comprises the first scan control unit and the second scan control unit;
Described first scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the sPPI scan pattern of the default angle of pitch, and the first radar echo signal produced is transferred to signal processing module;
Described second scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the RHI scan pattern at pre-configured orientation angle, and the second radar echo signal produced is transferred to signal processing module.
Adopt the beneficial effect of above-mentioned further scheme to be, by two kinds of scan patterns circulations, by dense fog visibility in space distribution situation by radar reflection echo record.
Further, the horizontal sweep speed of described first scan control unit controls millimeter wave cloud radar is 0.5 ~ 1 degree/second, and described default angle of pitch maximal value is no more than 5 degree, and minimum value is not less than 0 degree; Described second scan control unit controls millimeter wave cloud radar vertical scan rate is 1 ~ 2 degree/second, and described pre-configured orientation angle is 0 ~ 90 degree.
Adopt the beneficial effect of above-mentioned further scheme to be lower for dense fog distributing position, this angle of pitch effectively can carry out dense fog detection.Simultaneously for the lower feature of dense fog radar return, choose less sweep velocity, obtain more accumulation data.
Further, described signal processing module carries out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data to described first radar echo signal and described second radar echo signal;
The described reflectivity factor data that described signal processing module exports by described main control module and described linear depolarization ratio data are preserved;
Described data inversion module is used for the described reflectivity factor data of reading and saving in described main control module and described linear depolarization ratio data, and make the inverting of dense fog visibility according to the data read, thus obtain visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
The beneficial effect of above-mentioned further scheme is adopted to be: to utilize radar return data, carried out the inverting of dense fog visibility, obtain dense fog visibility data; Utilize the formula of radar reflectivity factor inverting visibility, radar can be obtained according to formula and often locate echo place state of visibility.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of millimeter wave cloud radar dense fog visibility Inversion System of the present invention;
Fig. 2 is the structural representation of millimeter wave cloud radar dense fog visibility Inversion System of the present invention;
In accompanying drawing, the list of parts representated by each label is as follows:
1, scan control module, 2, signal processing module, 3, information acquisition module, 4, main control module, 5, data inversion module, 6, pci bus, 7, shared drive.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Fig. 1 is the schematic flow sheet of millimeter wave cloud radar dense fog visibility Inversion System of the present invention; As shown in Figure 1, the method comprises the following steps:
Step 1: control millimeter wave cloud radar and carry out meteorological target detection by default running parameter and default scan pattern, and produce radar echo signal;
Step 2: carry out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal to radar echo signal, and export pretreated data;
Step 3: pretreated data are preserved;
Step 4: the pretreated data of reading and saving, and carry out the inverting of dense fog visibility to pretreated data, obtains visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
In addition, can also comprise between step 2 step 3: gather pretreated data, and these data be carried out packing process.
By the present invention, millimeter wave cloud radar can be utilized to have carried out the inverting of dense fog visibility thus effectively obtained the visibility distribution of dense fog space; Take full advantage of the advantage that millimere-wave band radar is strong to weak signal target particle detection ability, enrich the data product type of millimeter wave cloud detection radar.
Preferably, step 1 is implemented as:
Step 1.1: control millimeter wave cloud radar and carry out meteorological target detection by sPPI (SelectorPositionIndicator, referred to as the display of the selection planimetric position) scan pattern presetting the angle of pitch, and produce the first radar echo signal;
Step 1.2: RHI (RangeHeightIndicator highly shows referred to as the distance) scan pattern that pre-configured orientation angle pressed by control millimeter wave cloud radar is carried out meteorological target detection, and produced the second radar echo signal.
By the embodiment of the present invention, by the circulation of two kinds of scan patterns, by dense fog visibility in space distribution situation by radar reflection echo record.
Preferably, step 2 is implemented as:
Step 2.1: the first radar echo signal and the second radar echo signal are carried out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data.
By the embodiment of the present invention, utilize dense fog self property, have chosen effective judgment basis, dense fog echo and clutter are distinguished, obtain the effect of purification echo.
Preferably, step 2.1 is implemented as:
Step 2.1.1: arrange the threshold value of linear depolarization ratio data for-40dB, choose lower than the reflectivity factor data on the correspondence position of the linear depolarization ratio data of threshold value, wherein, correspondence position is same range bin and same position angle;
Step 2.1.2: according to reflectivity factor data area, the predetermined threshold value of reflectivity factor data is set, to remove the point that numerical value in reflectivity factor data does not belong to dense fog echo, wherein, predetermined threshold value minimum is not less than-70dBZ, and mxm. is not higher than-10dBZ;
Step 2.1.3: use the filter window of 3 × 1 by position angle sequence, and to the smoothing filtering of reflectivity factor data, obtain associated parameter data.
Wherein, step 2.1.1 and step 2.1.2 act as rejecting clutter, and echo singular point is rejected in acting as of step 2.1.3.
By the embodiment of the present invention, for the problem that dense fog echo is lower and clutter is close, according to droplet feature, selected characteristic division amount, rejects ground clutter.Simultaneously according to the even feature of dense fog small scale, choose Smooth scheme, reject radar return singular point.
Preferably, step 2.1.3 is implemented as:
Step 2.1.3.1: set scan control module 1 to carry out total the points of measurement that meteorological target detection obtains is as M, and total iterations is N;
Step 2.1.3.2: from 1, for the i-th point, calculates the average m of the reflectivity factor data of 3 observation stations around it;
Step 2.1.3.3: if the difference >=5dBZ of the absolute value of one of them observation station and average m, then remove the i-th point, otherwise retain the i-th point;
Step 2.1.3.4: the next point of calculating observation point, until calculate M;
Step 2.1.3.5: carry out next iteration, until iterate to times N.
By the embodiment of the present invention, utilize in dense fog small scale the feature that is evenly distributed, obtain the method rejecting radar singular point.
Preferably, step 4 is implemented as:
Step 4.1: for the reflectivity factor data of sPPI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each position angle in sPPI scan pattern data and each range bin, obtain visibility in level orientation distribution situation;
Step 4.2: for the reflectivity factor data of RHI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each angle of pitch in RHI scan pattern data and each range bin, obtain visibility in vertical orientations distribution situation.
By the embodiment of the present invention, utilize radar return data, carried out the inverting of dense fog visibility, obtain dense fog visibility data; Utilize the formula of radar reflectivity factor inverting visibility, radar can be obtained according to formula and often locate echo place state of visibility.
Fig. 2 is the structural representation of millimeter wave cloud radar dense fog visibility Inversion System of the present invention; As shown in Figure 2: this system comprises: scan control module 1, signal processing module 2, main control module 4 and data inversion module 5.
Scan control module 1, carries out meteorological target detection for controlling millimeter wave cloud radar by default running parameter and default scan pattern, and the radar echo signal of generation is transferred to signal processing module 2;
Signal processing module 2, rejects clutter and echo singular point to obtain the pre-service of dense fog echoed signal for carrying out radar echo signal, and exports pretreated data;
Main control module 4, preserves for the pretreated data exported by signal processing module 2;
Data inversion module 5, for the pretreated data of reading and saving in main control module 4, and carries out the inverting of dense fog visibility to pretreated data, obtains visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
In addition, this system can also comprise information acquisition module 3, the pretreated data that this information acquisition module 3 exports for collection signal processing module 2, and is transferred to main control module 4 by after these data packing process.Wherein, scan control module 1, signal processing module 2, signal processing module 2, information acquisition module 3, data inversion module 5 are connected by pci bus 6 with main control module 4 respectively, main control module 4 comprises pci bus 6 and shared drive 7, and radar echo signal is transferred to signal processing module 2 by pci bus 6 by scan control module 1; Signal processing module 2 pairs of radar echo signals carry out signal transacting and export; The radar echo signal that information acquisition module 3 collection signal processing module 2 exports, and be saved in shared drive 7 by pci bus 6 after carrying out packing process; Data inversion module 5 reads the radar echo signal in shared drive 7 after packing process by pci bus 6 and carries out the inverting of dense fog visibility, obtains inversion result.
By the present invention, millimeter wave cloud radar can be utilized to have carried out the inverting of dense fog visibility thus effectively obtained the visibility distribution of dense fog space; Take full advantage of the advantage that millimere-wave band radar is strong to weak signal target particle detection ability, enrich the data product type of millimeter wave cloud detection radar.
Preferably, scan control module 1 comprises the first scan control unit and the second scan control unit;
First scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the sPPI scan pattern of the default angle of pitch, and the first radar echo signal produced is transferred to signal processing module 2;
Second scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the RHI scan pattern at pre-configured orientation angle, and the second radar echo signal produced is transferred to signal processing module 2.
By the embodiment of the present invention, due to according to the circulation of two kinds of scan patterns, by dense fog visibility in space distribution situation by radar reflection echo record.
When millimeter wave cloud radar is in scanning probe process, the data that information acquisition module 3 collection signal processor exports, and reflectivity factor data wherein and linear depolarization ratio data are extracted, be saved in after packing process in the main control module 4 on industrial control computer.After one group of sPPI scanning observation completes, terminate this data storage operations, and observation data is saved as a data file; After one group of RHI scanning observation completes, terminate this data storage operations, and observation data is saved as a data file.
Preferably, the horizontal sweep speed of the first scan control unit controls millimeter wave cloud radar is 0.5 ~ 1 degree/second, suitable pulse accumulation number is set to ensure that the residence time of wave beam is less than beam angle divided by radar horizon sweep velocity, preset angle of pitch maximal value and be no more than 5 degree, minimum value is not less than 0 degree; Second scan control unit controls millimeter wave cloud radar vertical scan rate is 1 ~ 2 degree/second, arranges suitable pulse accumulation number to ensure that wave beam residence time is less than beam angle divided by radar vertical scan rate.Pre-configured orientation angle is 0 ~ 90 degree, set pre-configured orientation angle towards should without obvious shelter in detection range.
By the embodiment of the present invention, lower for dense fog distributing position, this angle of pitch effectively can carry out dense fog detection.Simultaneously for the lower feature of dense fog radar return, choose less sweep velocity, obtain more accumulation data.
Preferably, signal processing module 2 carries out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data to the first radar echo signal and the second radar echo signal;
The reflectivity factor data that signal processing module 2 exports by main control module 4 and linear depolarization ratio data are preserved;
Data inversion module 5 is for the reflectivity factor data of reading and saving in main control module 4 and linear depolarization ratio data, and make the inverting of dense fog visibility according to the data read, thus obtain visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
By the embodiment of the present invention, utilize radar return data, carried out the inverting of dense fog visibility, obtain dense fog visibility data; Utilize the formula of radar reflectivity factor inverting visibility, radar can be obtained according to formula and often locate echo place state of visibility.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a millimeter wave cloud radar dense fog visibility inversion method, is characterized in that, comprise the following steps:
Step 1: control millimeter wave cloud radar and carry out meteorological target detection by default running parameter and default scan pattern, and produce radar echo signal;
Step 2: carry out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal to described radar echo signal, and export pretreated data;
Step 3: described pretreated data are preserved;
Step 4: the described pretreated data of reading and saving, and carry out the inverting of dense fog visibility to described pretreated data, obtains visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
2. millimeter wave cloud radar dense fog visibility inversion method according to claim 1, it is characterized in that, described step 1 is implemented as:
Step 1.1: control millimeter wave cloud radar and carry out meteorological target detection by the sPPI scan pattern of the default angle of pitch, and produce the first radar echo signal;
Step 1.2: control millimeter wave cloud radar and carry out meteorological target detection by the RHI scan pattern at pre-configured orientation angle, and produce the second radar echo signal.
3. millimeter wave cloud radar dense fog visibility inversion method according to claim 1 or 2, it is characterized in that, described step 2 is implemented as:
Step 2.1: described first radar echo signal and described second radar echo signal are carried out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data.
4. millimeter wave cloud radar dense fog visibility inversion method according to claim 3, it is characterized in that, described step 2.1 is implemented as:
Step 2.1.1: arrange the threshold value of described linear depolarization ratio data for-40dB, choose lower than the reflectivity factor data on the correspondence position of the linear depolarization ratio data of described threshold value, wherein, described correspondence position is same range bin and same position angle;
Step 2.1.2: according to reflectivity factor data area, the predetermined threshold value of reflectivity factor data is set, does not belong to the point of dense fog echo to remove numerical value in described reflectivity factor data, wherein, described predetermined threshold value minimum is not less than-70dBZ, and mxm. is not higher than-10dBZ;
Step 2.1.3: use the filter window of 3 × 1 by position angle sequence, and to the smoothing filtering of reflectivity factor data, obtain associated parameter data.
5. millimeter wave cloud radar dense fog visibility inversion method according to claim 4, it is characterized in that, described step 2.1.3 is implemented as:
Step 2.1.3.1: set scan control module to carry out total the points of measurement that meteorological target detection obtains is as M, and total iterations is N;
Step 2.1.3.2: from 1, for the i-th point, calculates the average m of the reflectivity factor data of 3 observation stations around it;
Step 2.1.3.3: if the difference >=5dBZ of the absolute value of observation station described in one of them and described average m, then remove described i-th point, otherwise retain described i-th point;
Step 2.1.3.4: the next point calculating described observation station, until calculate M;
Step 2.1.3.5: carry out next iteration, until iterate to times N.
6. millimeter wave cloud radar dense fog visibility inversion method according to claim 5, it is characterized in that, described step 4 is implemented as:
Step 4.1: for the reflectivity factor data of described sPPI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each position angle in described sPPI scan pattern data and each range bin, obtain visibility in level orientation distribution situation;
Step 4.2: for the reflectivity factor data of described RHI scan pattern, utilize visibility inversion formula: Vis=40e
-0.069Z (dBZ)carry out visibility inverting, calculate the visibility data of each angle of pitch in described RHI scan pattern data and each range bin, obtain visibility in vertical orientations distribution situation.
7. a millimeter wave cloud radar dense fog visibility Inversion System, is characterized in that, comprising:
Scan control module, carries out meteorological target detection for controlling millimeter wave cloud radar by default running parameter and default scan pattern, and the radar echo signal of generation is transferred to signal processing module;
Signal processing module, for carrying out described radar echo signal as rejecting clutter and echo singular point are to obtain the pre-service of dense fog echoed signal, and exports pretreated data;
Main control module, preserves for the described pretreated data exported by described signal processing module;
Data inversion module, for the described pretreated data of reading and saving in described main control module, and the inverting of dense fog visibility is carried out to described pretreated data, obtain visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
8. millimeter wave cloud radar dense fog visibility Inversion System according to claim 7, it is characterized in that, described scan control module comprises the first scan control unit and the second scan control unit;
Described first scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the sPPI scan pattern of the default angle of pitch, and the first radar echo signal produced is transferred to signal processing module;
Described second scan control unit carries out meteorological target detection for controlling millimeter wave cloud radar by the RHI scan pattern at pre-configured orientation angle, and the second radar echo signal produced is transferred to signal processing module.
9. millimeter wave cloud radar dense fog visibility Inversion System according to claim 8, it is characterized in that, the horizontal sweep speed of described first scan control unit controls millimeter wave cloud radar is 0.5 ~ 1 degree/second, and described default angle of pitch maximal value is no more than 5 degree, and minimum value is not less than 0 degree; Described second scan control unit controls millimeter wave cloud radar vertical scan rate is 1 ~ 2 degree/second, and described pre-configured orientation angle is 0 ~ 90 degree.
10. millimeter wave cloud radar dense fog visibility Inversion System according to claim 9, is characterized in that,
Described signal processing module carries out rejecting clutter and echo singular point to obtain the pre-service of dense fog echoed signal and output reflection rate factor data and linear depolarization ratio data to described first radar echo signal and described second radar echo signal;
The described reflectivity factor data that described signal processing module exports by described main control module and described linear depolarization ratio data are preserved;
Described data inversion module is used for the described reflectivity factor data of reading and saving in described main control module and described linear depolarization ratio data, and make the inverting of dense fog visibility according to the data read, thus obtain visibility in the distribution situation of level orientation and the visibility distribution situation in vertical orientations.
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Effective date of registration: 20191216 Address after: 214000 28 Weiming Road, Binhu District, Wuxi City, Jiangsu Province Patentee after: Aerospace new weather Technology Co., Ltd Address before: 100854, 32, Yongding Road, 50, Beijing, Haidian District Patentee before: Beijing Institute of Radio Measurement |