激光測(cè)風(fēng)雷達(dá)PPI掃描監(jiān)測(cè)風(fēng)切變的數(shù)值模擬

doi:10.12306/2021jms.0053

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激光測(cè)風(fēng)雷達(dá)PPI掃描監(jiān)測(cè)風(fēng)切變的數(shù)值模擬
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                        10.12306/2021jms.0053
                    
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中圖分類(lèi)號(hào):P412.25
基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目（41575020）

Numerical simulation for wind shear detection with PPI scanning based on wind lidar

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摘要:

低空風(fēng)切變嚴(yán)重威脅飛機(jī)起降安全，而激光測(cè)風(fēng)雷達(dá)在晴空風(fēng)切變監(jiān)測(cè)方面具有顯著優(yōu)勢(shì)，但其監(jiān)測(cè)性能受到風(fēng)場(chǎng)特點(diǎn)和監(jiān)測(cè)算法的影響。由于無(wú)法對(duì)局地空間風(fēng)場(chǎng)進(jìn)行時(shí)空同步精細(xì)化探測(cè)，且風(fēng)場(chǎng)具有陣性，導(dǎo)致風(fēng)切變監(jiān)測(cè)會(huì)出現(xiàn)虛警率、漏報(bào)等現(xiàn)象，只能通過(guò)數(shù)值模擬仿真的方式，對(duì)不同風(fēng)場(chǎng)的監(jiān)測(cè)性能進(jìn)行分析評(píng)估。本文首先仿真構(gòu)建了四種具有代表性的風(fēng)場(chǎng)類(lèi)型，然后模擬激光測(cè)風(fēng)雷達(dá)平面—位置顯示（Plane Position Indication，PPI）掃描方式獲取不同仿真風(fēng)場(chǎng)下的徑向風(fēng)速數(shù)據(jù)，最后利用八鄰域系統(tǒng)算法對(duì)徑向風(fēng)速數(shù)據(jù)進(jìn)行風(fēng)切變監(jiān)測(cè)，驗(yàn)證不同類(lèi)型風(fēng)場(chǎng)下激光測(cè)風(fēng)雷達(dá)PPI掃描方式監(jiān)測(cè)風(fēng)切變算法的有效性。結(jié)果表明，激光測(cè)風(fēng)雷達(dá)PPI掃描結(jié)果能夠真實(shí)地反映風(fēng)場(chǎng)情況；八鄰域系統(tǒng)算法能夠有效識(shí)別風(fēng)切變；在進(jìn)行風(fēng)切變檢測(cè)時(shí)，應(yīng)盡可能地考慮到多個(gè)方位上的切變值，避免漏報(bào)。

Abstract:

Low level wind shear seriously threatens the safety of aircraft taking off and landing. Wind lidar has significant advantages in wind shear detecting in clear sky, but its detecting performance is affected by the characteristics of the wind field and the detecting algorithm. As the local spatial wind field cannot be refined in time and space, and the wind field is gusty, the wind shear detecting will have false alarm rates and missed reports. The detecting performance of wind lidar in different wind fields can only be analyzed and evaluated through numerical simulation. This paper first constructs four representative wind fields, then simulates the wind lidar PPI scanning method to obtain the radial wind speed data under different simulated wind fields, finally uses the eight-neighbor system algorithm to perform wind shear detection on the radial wind speed data, to verify the effectiveness of the PPI scanning method of wind lidar for monitoring wind shear in different wind field. The results show that the PPI scanning results of the wind lidar can truly reflect the situation of the wind field. The eight-neighbor system algorithm can effectively identify wind shear. In the process of wind shear detection, the shear values in multiple directions should be considered as far as possible to avoid missing reports.

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趙文凱,趙世軍,單雨龍,孫學(xué)金.激光測(cè)風(fēng)雷達(dá)PPI掃描監(jiān)測(cè)風(fēng)切變的數(shù)值模擬.氣象科學(xué),2023,43(5):624-631 ZHAO Wenkai, ZHAO Shijun, SHAN Yulong, SUN Xuejin. Numerical simulation for wind shear detection with PPI scanning based on wind lidar. Journal of the Meteorological Sciences,2023,43(5):624-631

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收稿日期:2020-09-28
最后修改日期:2021-05-31
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在線(xiàn)發(fā)布日期: 2024-01-23
出版日期: 2023-10-15

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