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When the problem has been fixed or the condition causing the event has passed, the event
status changes to

OVER

and the event message disappears from the

Events

panel.

The

OVER

status is shown only in the history files, which you can view with the ASCII Log

View application. You can use the history files to track, for example, how long it took for a
problem to be solved.
The following table shows an example of the event chain.

Table 22 An Example of the Event Chain

Event

Color

System Event Message and
Status

ASCII Log View Message and
Status

Communication
between cloud height
meter and CDU
corrupted at 09:38

Red event row
in Diagnostics

09:38 LLWAS_WIND_SENSOR

DATA MISSING

, Status:

ALARM

09:38 LLWAS_WIND_SENSOR

DATA MISSING

, Status:

Observer notices and
acknowledges the
event at 09:43

Red Status
column in
Diagnostics

09:43 LLWAS_WIND_SENSOR

DATA MISSING

, Status:

ACKNOWLEDGED ALARM

09:43 LLWAS_WIND_SENSOR

DATA MISSING

, Status:

Maintenance fixes the

problem at 10:09

Message disappears from

Events panel

10:09 LLWAS_WIND_SENSOR

DATA MISSING

, Status:

over)

More Information

‣

Introduction to ASCII Log View (page 55)

6.4 Troubleshooting Diagnostics

Table 23 Troubleshooting Diagnostics Application

Problem

Probable Cause

Solution

The Heartbeat icon is static green,
not blinking.

The Diagnostics application is
down.

Restart the application.

Low-Level Windshear Alert System User Guide

M210885EN-K

Summary of Contents for CT25K

Page 1: ...M210885EN K User Guide Vaisala AviMet â Low Level Windshear Alert System ...

Page 2: ... given time and hereby disclaims any and all responsibilities related thereto This manual does not create any legally binding obligations for Vaisala towards customers or end users All legally binding obligations and agreements are included exclusively in the applicable supply contract or the General Conditions of Sale and General Conditions of Service of Vaisala This product contains software dev...

Page 3: ...2 WeatherView User Interface 17 4 2 1 LLWAS Screen 19 4 2 2 Centerfield Wind Data and Time 20 4 2 3 LLWAS Processing Status 20 4 2 4 Weather Data Fields 21 4 2 5 Wind Options 25 4 2 6 Reports and Notifications Pane 27 4 2 7 Radar Warnings 28 4 2 8 Sensor Control Feature 29 4 2 9 Graph Fields 30 4 2 10 WeatherView Buttons 32 4 2 11 Day and Night Display Modes 33 4 3 Operating WeatherView 33 4 3 1 S...

Page 4: ...owledging Events 52 6 3 3 Viewing Stored Events 53 6 4 Troubleshooting Diagnostics 54 7 ASCII Log View 55 7 1 Introduction to ASCII Log View 55 7 2 ASCII Log View User Interface 55 7 2 1 ASCII Log View Main Window 56 7 2 2 Weather Parameter Files 57 7 2 3 Reports Files 58 7 2 4 Events Files 59 7 2 5 ASCII Log View Toolbar Buttons 60 7 3 Operating ASCII Log View 60 7 3 1 Starting ASCII Log View 61 ...

Page 5: ...Glossary 73 Index 77 Technical Support 81 Warranty 81 Recycling 81 Table of Contents 3 ...

Page 6: ...e with Runway Graphic in Tower View Line Indicating North Direction 27 Figure 13 Wind Rose with Wind Values Above 27 Figure 14 Notifications Pane with Acknowledge Button 28 Figure 15 Radar Warnings in WeatherView 28 Figure 16 Sensor Control Window 29 Figure 17 Graph Field Example 30 Figure 18 Graph Trace View 30 Figure 19 Graph Configuration Window 31 Figure 20 WeatherView Night Display Mode 33 Fi...

Page 7: ... 14 WeatherView Sample LLWAS Screen Texts 35 Table 15 Troubleshooting WeatherView 41 Table 16 Wind Flag Samples 45 Table 17 Graphical Windshear Display Buttons 46 Table 18 Troubleshooting Graphical Windshear Display 48 Table 19 Events Panel Tabs Event Types 51 Table 20 Events Panel Statuses and Colors 51 Table 21 Events Panel Columns and Buttons 51 Table 22 An Example of the Event Chain 54 Table 2...

Page 8: ...Low Level Windshear Alert System User Guide M210885EN K 6 ...

Page 9: ...aisala AviMetâ Automated Weather Observing System Maintenance Manual M210885EN Vaisala AviMetâ Low Level Windshear Alert System User Guide M210886EN Vaisala AviMetâ Low Level Windshear Alert System Maintenance Manual M210887EN Vaisala AviMetâ Runway Visual Range System User Guide M210888EN Vaisala AviMetâ Runway Visual Range System Maintenance Manual M210842EN Vaisala AviMetâ Synoptic Observations...

Page 10: ...be lost CAUTION Note highlights important information on using the product Tip gives information for using the product more efficiently Lists tools needed to perform the task Indicates that you need to take some notes during the task 1 4 Trademarks AviMetâ is a registered trademark of Vaisala Oyj Microsoftâ Windowsâ and Internet Explorerâ are either registered trademarks or trademarks of Microsoft...

Page 11: ...surement data calculates the values based on the data and distributes the weather data and alarms to user workstations Vaisala AviMetâ Low Level Windshear Alert System LLWAS consists of wind speed and wind direction sensors located around the runway area perimeter The CDU processes the horizontal wind speed and direction data using the LLWAS III algorithm developed by NCAR for the U S Federal Avia...

Page 12: ...orking transparently to users and without any disruption to system performance A CDU may be used as an end user workstation too For more information on the CDU types see Vaisala AviMetâ Low Level Windshear Alert System Maintenance Manual 2 3 System Configuration Vaisala AviMet systems are always configured individually for each airport to meet the local requirements During system delivery Vaisala ...

Page 13: ...ts of applications end user applications and system maintenance applications which are the tools needed for system troubleshooting The following sections include brief descriptions of what each end user application is used for The AviMet LLWAS software focuses on the following aspects of airport weather observation Displaying wind data WeatherView and Graphical Windshear Display Displaying windshe...

Page 14: ...used for monitoring the status of the CDU s internal components ROA processes objects workstation applications sensors and other devices in the system and for viewing system events Depending on system configuration other AviMet maintenance applications such as ASCII Log View and IO Terminal can be accessed directly through Diagnostics IO Terminal The IO Terminal application is used for connecting ...

Page 15: ...nuals for some applications Refer to the list of related manuals For information on the applications for the Maintenance user profile see Vaisala AviMetâ Low Level Windshear Alert System Maintenance Manual Table 4 Typical Software Applications by User Profile Application Observer Forecaster ATC Maintenance WeatherView x x x x Graphical Windshear Display x x x x Diagnostics x x x ASCII Log View x x...

Page 16: ...imit typically 15 knots a windshear alert is issued In cases where there are multiple windshear condition situations the cases are arbitrated and only the most hazardous alert for that runway is issued The arbitration order is 1 Microburst 2 Windshear with large loss 3 Windshear with large gain 4 Windshear with small loss 5 Windshear with small gain In these cases the location reported is the loca...

Page 17: ...do not start the software license may not be available or activated Contact your system maintenance personnel To view meteorological data and alarms keep the WeatherView application and the Notifications pane open at all times CAUTION To start the applications that do not start automatically click the corresponding icon on the desktop or for example in the WeatherView application Depending on syst...

Page 18: ...figuration For example the Sensor Control functionality may be part of WeatherView application or another application as configured The following table shows the typical icons used for AviMet applications Table 5 Vaisala AviMet Application Buttons Button Description Opens the WeatherView application Opens the Diagnostics application optional Opens the ASCII Log View application More Information St...

Page 19: ...ear Display page 43 4 2 WeatherView User Interface The WeatherView user interface consists of different data elements arranged and displayed depending on system configuration Typical data elements include the LLWAS screen wind roses identification data graphical windshear display and optionally fields for other weather data There are standard display options available for different user profiles I...

Page 20: ...a map on the background 3 Identification data in application header for example time and date 4 Button for selecting day night display and for printing 5 Wind rose elements 6 LLWAS screen 7 Centerfield wind data 8 LLWAS processing status More Information LLWAS Screen page 19 Operating WeatherView page 33 Introduction to Graphical Windshear Display page 43 Low Level Windshear Alert System User Guid...

Page 21: ...d direction at the threshold in degrees 6 Wind speed at the threshold in knots In windshear or microburst alert situation the letters WSA or MBA and the red alarm frame indicate the alert situation When there are no windshear alerts only wind speed and wind direction values for the runway are displayed The sensors that send the wind speed and wind direction data are located at the end of the runwa...

Page 22: ...d direction data MM Missing wind speed data 4 2 2 Centerfield Wind Data and Time The centerfield wind data and time are displayed on the weather data screens The location of this data on the screen depends on the configuration of the system The sensor that sends the centerfield data is defined during configuration The time is set to the UTC time Universal Time Coordinated from the computer clock 4...

Page 23: ... the system first collects data typically for a 2 or 10 minute period and then calculates the average value from that data The data is processed data not raw sensor data This means that when values come from sensors to the CDU the system checks that values fall within the specified range for that sensor Values are also rounded and displayed according to ICAO specifications and recommended practice...

Page 24: ...are as follows Instant values appear immediately in WeatherView data fields and their data status is normal Average values remain missing until the system has collected enough data to calculate valid average values When the connection between a sensor and the CDU is broken or when a sensor is out of order the data status on WeatherView screens turns first to old Later the values will disappear fro...

Page 25: ...udiovisual Alerts If the audiovisual alerts option has been selected the system can be configured to include alert frames and sound alerts This is typically available for wind cloudbase and RVR pressure temperature and prevailing visibility fields An alert frame is displayed around the weather data field for example when a weather parameter value exceeds a preconfigured customer specified limit Ty...

Page 26: ...different types of alerts are linked to the same data field alert frame then only the most severe alert is shown Alarm overrides warning and notification warning overrides notification Depending on the system configuration the alerts can be automatically acknowledged or an ACK button is included for acknowledging them Depending on system configuration and the notification type the acknowledging wi...

Page 27: ...an be displayed according to the runway in use information For example Runway 33 15 with RWY15 in Use Headwind tailwind and crosswind H07 R08 according to RWY in use information This applies to numerical and graphical presentations 4 2 5 2 Headwind Tailwind and Crosswind Presentation Options Depending on your system configuration the wind components relative to the runway direction that is headwin...

Page 28: ...variation is always displayed Optionally it is possible to display the variation only when the ICAO rules apply ICAO Annex 3 Runway graphic indicates the runway direction either from north or tower view Optionally wind values may also be displayed in the middle of the windrose Depending on user needs the wind direction can be displayed either based on magnetic or true north Depending on your syste...

Page 29: ...ted whenever a new report is sent The Notifications pane can be configured to be displayed as an informative field in the WeatherView displays There may be a notification informing you that METAR editing time has started or that a METAR report has been sent In addition to the notification text the notification can contain a colored frame which may be flashing and a sound alert The colors flashing ...

Page 30: ...ngs TCU Towering cumulus CB Cumulonimbus SH Showers GR Hail The first value shows the distance of the cloud from the airport reference point in kilometers The second value shows the compass point of the cloud from the airport reference point If a compass point is not shown the cloud is on top of the airport An orange frame around the value means that the cloud is forming A red frame means that the...

Page 31: ...omatic data Figure 16 Sensor Control Window Table 11 Sensor Control Window Element Explanation Selection Status Shows the status of the sensor selection Auto The system selects the sensor automatically in priority order Manual The user selects the sensor manually from the Selection list Selection Shows the sensors available in the system in priority order Current Shows the currently used sensor Ap...

Page 32: ...ox 4 Time span selection buttons When the Trace check box is selected and the mouse pointer is placed over the graph the graph name the exact values at the pointer location and the units for all the displayed graphs are shown on top of the graph Figure 18 Graph Trace View In addition you can hide and show the plot lines change the time span and display the exact values at the pointer location More...

Page 33: ...ually for each graph The window has tabs with selections for changing the properties of the axes grids and plot lines Depending on the system configuration and your user profile the configuration window may contain only one tab Axes two tabs Axes and Grids or all three tabs Axes Grids and Plots Figure 19 Graph Configuration Window When the WeatherView application is closed and restarted the graph ...

Page 34: ...ration Table 13 WeatherView Example Buttons Button Description Button for selecting between the predefined day and night display modes Button for printing the screen Buttons for accessing the different WeatherView tabs The arrow indicates the selected tab The number and content of the buttons depend on the system configuration Opens the Main view Opens the Graph view Opens the Met view Opens the A...

Page 35: ...ns the day mode and the night mode The modes can be switched using the day night button The day mode is used in conditions with a lot of background light when the screen also needs to be illuminated well to be visible for example during day time The night mode is useful when there is not much light available and the reflections should be minimized for example during night time Figure 20 WeatherVie...

Page 36: ...therView starts a view specified in configuration is automatically displayed Depending on the configuration of the system there might be several weather data views available 1 To navigate between the available views in the WeatherView application click one of the navigation buttons 4 3 3 Switching between Day Night Display Mode 1 Click the day night button in the application header once 2 To switc...

Page 37: ...ses are arbitrated and only the most hazardous alert for that runway is issued The arbitration order is the following a Microburst b Windshear with large loss c Windshear with large gain d Windshear with small loss e Windshear with small gain In these cases the location reported is the location of the first encounter with any of these phenomena When the windshear conditions are at the runway area ...

Page 38: ...ase 2 nautical miles from final approach 050 Wind direction at the threshold 1 50 degrees 15 Wind speed at the threshold 1 15 meters per second The maximum value shown is 99 10RD MBA 30K RWY 300 12 10RD Runway in this case 10 right departure MBA Microburst alert 30K Headwind loss 30 knots RWY Location of the first encounter with the windshear condition in this case the runway 300 Wind direction at...

Page 39: ...nowledging Weather Data Field Alerts Your system may include alerts in the weather data fields typically alert frames and or sound alerts Depending on system configuration the alerts may be automatically acknowledged after a preconfigured time or you have to click the ACK button to acknowledge them Clicking the button will for example stop the flashing and or sound alert More Information Weather D...

Page 40: ...1 h The system changes the time span and the plot lines are adjusted accordingly 4 3 10 2 Hiding Showing Plot Lines 1 To hide a plot line remove the selection from the check box next to its name in the legend The plot line will be hidden 2 To show the plot line again select the check box for that plot line 4 3 10 3 Viewing Exact Values Trace View To display the exact values in the mouse pointer lo...

Page 41: ...values for the leftside and the rightside axis separately To determine how many graph grid lines are drawn enter the value in the Step field 3 Select the time scale from the Time scale drop down list The changes are valid immediately When you close the WeatherView application the default configuration will be used again 4 3 11 2 Configuring Grid Line Color and Style 1 Right click on the graph you ...

Page 42: ...the default configuration will be used again 4 4 Troubleshooting WeatherView If you detect problems in WeatherView first check the Diagnostics application for more details on the situation If there are problems with the sensors the name of the sensor is included in the event message Make a note of the sensor and report the information to maintenance personnel The following table lists some problem...

Page 43: ...e There are slashes in data fields The data is missing because of problems in the system Check the Diagnostics application for DATA MISSING message If there is no DATA MISSING message wait for 10 minutes The data status should change back to normal The system has been recently restarted and there is not enough data available yet If the slashes remain in the fields contact maintenance Data field va...

Page 44: ...Low Level Windshear Alert System User Guide M210885EN K 42 ...

Page 45: ...ings generated by the system when the calculated windshear and microburst conditions exist In addition the display indicates wind conditions on each wind site with wind flags More Information LLWAS Algorithm page 13 5 2 Graphical Windshear Display User Interface The user interface consists of the image of the airport the round sensor site symbols the wind flags and the Area Noted for Attention ARE...

Page 46: ...number 4 Buttons for acknowledging alerts sound on off showing hiding the site numbers inside the sensor site symbols and testing The user interface is configured individually for each system thus the colors and functionality of your system may differ from the one presented in this manual CAUTION Low Level Windshear Alert System User Guide M210885EN K 44 ...

Page 47: ...ample WS08 110 9 5 2 3 Wind Flags The site symbols have wind indicator flags attached to them These flags represent the wind sensors installed in the site The wind indicators consist of flags with bars at the end of the flag to indicate wind speed and direction The bars combine to indicate the wind speed in 5 knot increments about 2 5 meters per second increments For a more detailed explanation of...

Page 48: ...h a configurable color The alerts blink when triggered until acknowledged When the alert is acknowledged the blinking stops but the alert color remains on until the alert situation is over If another alert is issued for the same runway the blinking starts again A yellow frame around boxes indicates a possible windshear alert outside of the network 5 2 5 Graphical Windshear Display Buttons Table 17...

Page 49: ... wind direction value and the wind speed value for example WS08 110 9 More Information Wind Flags page 45 5 3 3 Acknowledging Windshear Alerts The Graphical Windshear Display displays the windshear alerts as blinking alert boxes when they are issued by the software If configured and selected also an alarm sound is heard Different sounds may have been configured for windshear and microburst alerts ...

Page 50: ... boxes 5 4 Troubleshooting Graphical Windshear Display Table 18 Troubleshooting Graphical Windshear Display Problem Probable Cause Solution There is a cross across the sensor site symbol There is no connection to the sensor and the wind speed or wind direction data are missing There might be technical problems with the sensor Contact maintenance Slashes are displayed in the alert box Connection to...

Page 51: ...action If the system includes a log printer all events can be configured to be printed automatically as they occur Optionally the Diagnostics application can include the sound alarm function Before reading this chapter find out the system event monitoring practices at your airport Diagnostics is a tool primarily intended for maintenance personnel At some airports the task of monitoring events belo...

Page 52: ...l The Events panel displays the messages sent by the system The messages inform the users of system events such as changed weather conditions and problems in the system These messages have different types and statuses The figures show event messages created during software test conditions using an AWOS system Normally the Events panel includes fewer event messages and the periods between messages ...

Page 53: ...wledged event informing about a fault that prevents the system from working properly or a critical operational change Typically requires immediate action ACKNOWLEDGED ALARM Red status column only An acknowledged alarm event WARNING Orange Yellow An unacknowledged event about a situation that if persisting may lead into the system not working properly Typically requires at least monitoring ACKNOWLE...

Page 54: ...sound for the current alarms A new alarm event will activate the sound alarm again This button does not acknowledge the alarm 6 3 Operating Diagnostics Application 6 3 1 Starting and Exiting Diagnostics Depending on your user profile and system configuration the application may start automatically when you log in to an AviMet workstation or you can open it using the corresponding shortcut icon for...

Page 55: ...knowledgement The Status column stays red until the reason for the event has disappeared You may need to click on another tab to reveal all unacknowledged events You may not have the rights to acknowledge all events notifications that you see If the sound alarm starts again there are new unacknowledged events If sound alarm is configured 5 Depending on the type and status of the event message act ...

Page 56: ...pted at 09 38 Red event row in Diagnostics 09 38 LLWAS_WIND_SENSOR DATA MISSING Status ALARM 09 38 LLWAS_WIND_SENSOR DATA MISSING Status 2 Observer notices and acknowledges the event at 09 43 Red Status column in Diagnostics 09 43 LLWAS_WIND_SENSOR DATA MISSING Status ACKNOWLEDGED ALARM 09 43 LLWAS_WIND_SENSOR DATA MISSING Status 1 Maintenance fixes the problem at 10 09 Message disappears from Eve...

Page 57: ...s contain sensor data meteorological calculation results sent reports and technical alarms warnings and notifications The history files can contain practically any ASCII formattable data that has been available in the system during operation For example external interface output server to display output data sources and changes during report preparation and more detailed system status information ...

Page 58: ...e been selected for viewing the files are displayed either in Tab or Tile mode inside the ASCII Log View main window See Figure 24 page 57 and Figure 25 page 59 The number and type of parameters that the system stores in history files depends on the system configuration Some examples of typical files are presented in the following sections Low Level Windshear Alert System User Guide M210885EN K 56...

Page 59: ...001 03 28 12 30 30 SITE The measurement site or runway for example 02L Parameter name The stored weather parameter name and its identification data for example RVR_1A In LLWAS systems for example centerfield wind data the processing status of the LLWAS algorithm the LLWAS data as shown in the WeatherView application or the voltage of the solar batteries of each site ST When applicable The status o...

Page 60: ...being missing U Undefined When data has been measured or calculated but the numerical value cannot be determined the status is Undefined For example cloud layers have been measured but there are no clouds Data value may be available but it should not be used 7 2 3 Reports Files Reports File Parameters Reports files can include the created weather reports for example METAR as displayed in the Weath...

Page 61: ...can contain events files which typically show the events as they are displayed in the Diagnostics application Figure 25 ASCII Log View Example Events Files Tab Mode The contents of the files are defined during system configuration thus the events file may differ from the ones presented here Examples of some typical events file column parameters TIME The date and time of the event The format is YYY...

Page 62: ...active screen The button is enabled only when there is at least one file open Checks every 10 seconds if the file has changed and updates the data on the screen with the changed data Immediately checks if the file has changed and updates the data on the screen with the changed data Moves to the first row of the file Moves to the last row of the file Shows the non printable characters binary values...

Page 63: ...ry files on a network drive which can be accessed by sharing the drive and mapping it on the workstation Figure 26 ASCII Log View Opening History Files Table 27 Sample ASCII Log View File Names Example Path and File Name Stored Data Explanation Avimet history month PARAMETER _02L_25 his Weather data Parameter data for measurement site 02L from the 25th day of the month Avimet history month REPORTS...

Page 64: ...dow 7 Open all the files you wish to view and select either Tab mode or Tile mode see Viewing Several Files at the Same Time page 62 8 When files are open you can do the following To see all the columns drag the column borders or use the horizontal scroll bar If longer texts are not displayed select Wrap Text to make the text flow into several lines You can move inside the file by clicking First R...

Page 65: ...n the screens is not refreshed To manually refresh the data 1 Click Refresh in the toolbar The screen is immediately updated with any changed data 7 3 6 Hiding Rows When a history file is open you can hide rows as needed 1 Select the row or rows that you want to hide To select one row Click the row number in the first column to select the row To select consecutive rows for example rows 5 to 20 Cli...

Page 66: ...application of your office tool kit You can also save the active file as a text file by clicking Save As in the toolbar This saves the file in txt format in the same folder where the his file is located 7 3 9 Backing up History Files If available for your user profile you can back up the ASCII database history files on an external drive The history folder structure must be in format year month day...

Page 67: ... on your workstation You cannot find history files for the previous months Depending on the configuration the history files might be stored only for one month Check the storage time from system maintenance or airport specific documentation When viewing a history file some parameters or columns are missing The columns might have been dragged on top of each other by mistake Drag the column borders s...

Page 68: ...Low Level Windshear Alert System User Guide M210885EN K 66 ...

Page 69: ...ssage type and sensor status Figure 27 Sensor Selector User Interface Table 29 Sensor Selector Columns Column Description Name Name of the sensor in the system Mode Shows if the sensor is disabled or enabled Enabled Enabled checkbox selected Data from an enabled sensor is used in the system and its status is Online Disabled Enabled checkbox not selected Data from a disabled sensor is not used in t...

Page 70: ... sensor and use alternative sources for data 8 3 Operating Sensor Selector 8 3 1 Disabling Data Use If a sensor is faulty or being maintained you can disable the sensor by doing the following 1 Move the mouse pointer over the row for the sensor that you want to disable 2 Deselect the Enabled checkbox This will change its status to Offline and the data from it will not be published for other system...

Page 71: ... UNDERSTANDING BETWEEN THE PARTIES 1 Product The Software means a single copy in object code format of the AviMetâ software used with or to control Vaisala sensors and created by Vaisala for use on a single computer 2 Grant This Software is licensed not sold to you by Licensor Licensor grants to you and you hereby accept a nonexclusive nontransferable limited right to access obtain download instal...

Page 72: ...further use or possession of the Software You agree that if you fail to comply the terms and conditions of this License Licensor may terminate the License and you shall return or destroy all copies of the Software as requested by the Licensor 5 Disclaimers and Limited Warranty THE SOFTWARE IS PROVIDED AS IS AND LICENSOR DISCLAIMS ANY AND ALL WARRANTIES AND CONDITIONS EXPRESS OR IMPLIED INCLUDING B...

Page 73: ...y other relief granted reasonable attorney fees and expenses of litigation 8 Third Party Software To the extent any software or other technology that is owned by a third party is accessed or used in combination with the Software you shall be obligated to obtain a license or rights to such third party software or technology before Software access delivery or use and you assume the entire responsibi...

Page 74: ...rms and conditions herein 13 Intellectual Property Licensor represents and you agree that the Software including source and object code is confidential and proprietary to Licensor All confidentiality and proprietary notices including but not limited to copyright notices displayed on the Software shall remain intact and unaltered and shall be included on any documents media printouts visualizations...

Page 75: ...measurement is missing but the LLWAS data is still fairly accurate See also normal LLWAS processing status and support LLWAS processing status Diagnostics An AviMet application for monitoring system status and events duplicated system An AviMet system that has two CDUs one active and one passive hot standby Other system types are single CDU system with or without workstations event A system event ...

Page 76: ...e The size of the event is typically less than 4 kilometers across Microbursts are capable of producing winds of more than 100 mph causing significant damage The life span of a microburst is around 5 15 minutes See also microburst alert and microburst conditions microburst alert An alert generated in the WeatherView application when the calculated microburst conditions exist See also microburst an...

Page 77: ...vation site such as an automatic weather station or an airport site Alternatively the location at which weather data is measured sound alarms An optional feature in several AviMet applications stored data Data that the system stores in ASCII Log View in contrast to current data support LLWAS processing status A data status displayed in the LLWAS screen in the WeatherView application The status ind...

Page 78: ...ther weather data fields and wind roses windshear A weather event involving abrupt changes in wind speed and or direction over a short distance See also windshear alert and windshear conditions windshear alert An alert generated in the WeatherView application when the calculated windshear conditions exist See also windshear and windshear conditions windshear conditions Based on horizontal wind spe...

Page 79: ...delivery 10 Diagnostics troubleshooting 54 Diagnostics description Events panel 50 event types 50 51 introduction 49 stored events 53 user interface 49 Diagnostics how to acknowledge events 52 exit application 52 monitor events 52 start application 52 view stored event messages 53 Diagnostics user interface 49 E exiting applications 15 F forecasters ASCII Log View user interface 55 software applic...

Page 80: ...ostics 54 Graphical Windshear Display 48 WeatherView 40 U user interface 15 application icons 15 ASCII Log View 55 Diagnostics 49 Graphical Windshear Display 43 Sensor Selector 67 WeatherView 17 user profiles 13 V viewing history files in ASCII Log View 61 W weather data fields 21 WeatherView troubleshooting 40 WeatherView description alert frame 23 average values 22 buttons 32 centerfield data 20...

Page 81: ... between views 34 use trace 38 view exact values in graphs 38 wind data in Graphical Windshear Display 45 wind rose 26 windshear alerts LLWAS screen in WeatherView 19 message format 19 monitoring 34 WMO recommendations 14 workstation types 13 WV WeatherView workstation 13 Index 79 ...

Page 82: ...Low Level Windshear Alert System User Guide M210885EN K 80 ...

Page 83: ...ee www vaisala com support Warranty For standard warranty terms and conditions see www vaisala com warranty Please observe that any such warranty may not be valid in case of damage due to normal wear and tear exceptional operating conditions negligent handling or installation or unauthorized modifications Please see the applicable supply contract or Conditions of Sale for details of the warranty f...

Page 84: ...Low Level Windshear Alert System User Guide M210885EN K 82 ...

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