空管资料4(25)

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occurred. Studies by the FAA, NCAR, and the University of Chicago were
conducted in the Denver area, and showed that microbursts were responsible.
在上个世纪七、八十年代，大量的起飞和降落事故发生。根据美国FAA（联邦航空局
）、NCAR（国家大气研究中心）和芝加哥大学在丹佛地区的研究表明，微爆流是主
因。
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MetConsole LLWAS
(Low-Level Windshear Alert System) / 风切变系统软件平台
 Phase III NCAR LLWAS Algorithm Implementation
运用第三代NCAR LLWAS演算法
 Site Performance Evaluation System (SPES) Implementation
站点性能评估系统
 Graphical and Alphanumeric Displays
地图和文字显示
 Robust Remote Stations – MTBF > 35 years
坚固耐用的远程站– 平均故障间隔时间（MTBF） > 35年
 Robust Communication protocol – Bit Error Rate > 10-5 means
no lost packets
可靠的通讯协议- 比特误差率> 10-5 意味着信息无丢失
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How does LLWAS work? / LLWAS工作原理
LLWAS uses additional wind vanes installed
around the airport to detect wind shear
based on the ground level wind. / LLWAS利
用安装在机场周围的风向标检测近地风切变。
The system uses a fluid
modelling algorithm to
deduce the presence of
wind shear or
microbursts based on the
measured surface wind. /
系统基于测量的地表风使
用流体建模算法推算出地
面风切变和微爆流的存在
。
The result is presented
on a graphics console in
the control tower and
used to improve the
safety of all landings and
take-offs at the airfield. /
结果显示在控制塔内的图
形界面上，并被用来改善
机场所有航班起降的安全
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LLWAS Shear Calculation / 风切变计算
09
27
Divergence / 辐散
Convergence / 辐合
Station-to-Station
Winds Difference
站-站之间的
风差异
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Remote Station Network – Kuwait City
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Remote Station Network – Bilbao
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Remote Station Network – Tenerife Sur
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Master Station / 主站
 High quality server hardware
高质量服务器硬件
 Industrial rack mounted
工业机架
 Built-in secure console
内置安全控制台
 Field tested LLWAS III NE
algorithm
实际应用中验证的LLWAS NE第
三代算法
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LLWAS Alerts / 风切变警报
Alert Message Format / 警报报文格式
 Alphanumeric Alarm Display (AAD) is limited to 25 characters per line
and has 10 lines.
文字警报显示（AAD）每行可显示25个字，共10行
 The alert content was designed to fit the 25 character limit.
警报内容设定在25字以内
09A MBA 35k- 3MF
Runway ID Alert Type Intensity Location
跑道名称警报类型强度位置
“Eva 555, microburst alert, expect a thirty-five knot loss at three miles final.”
“Eva 555跑道、微爆流警报、预计35节风损、距离跑道3英里。”
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RealTime and Historical Displays / 实时和历史显示
Alphanumeric Display Mode / 文字显示模式
Map Display Mode
地图显示模式
Archive Display / Replay
文档显示/ 重放
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RealTime and Historical Displays
Alphanumeric Display Mode – CKS Airport
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RealTime and Historical Displays
Graphical Display Mode – CKS Airport
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Integration with other Systems
 MetConsole allows integration with other systems
 Wind profilers give vertical Wind Shear
 Doppler Weather Radar supplement LLWAS detection
 3-D Wind Shear Model R&D Development underway
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Anemometer / 风速仪
 Completely open sensor architecture.
完全开放的传感器架构
 Can use any Sensor on the market
可以使用市场上任意一种流行的传感器
 Ultrasonic or Cup-and-vane system
超声波或风杯－风向标系统
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Remote Station
 Manufactured by Telvent to
FAA specifications
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LLWAS Data Collection Sub-system / 风切变数据采集子系统
　
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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