stormscope/xm wx lighning1 stormscope weather mapping system l-3 wx-500 prepared by tj spitzmiller
TRANSCRIPT
Stormscope/XM Wx Lighning 1
Stormscope Weather Mapping System
L-3 WX-500
Prepared by
TJ Spitzmiller
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Lightning• Lightning comes in three types,
– fork,
– ball, and
– sheet.
• Fork is most wide-spread—ball is very rare.
• Because lightning is an intense electrical discharge – it generates electromagnetic frequencies (EMF)
– can be picked up by a “radio receiver”
– Try listening to an AM radio station during a thunderstorm.
Concepts
• First airborne instrument developed specifically to detect and map thunderstorms
• Analyzes radiated signals of electrical discharges (lightning) from storm cells.
• During cumulus stage storm cells are usually precipitation-free– Weather radar unable to show activity.
• Stormscope detects electrical activity already present as storm builds – Provides accurate view of areas to be avoided.
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Function
• Processes both azimuth and range to determine the location and intensity of dangerous thunderstorm cells
• Presents findings in real-time• Plots lightning as it happens, before the onset
of precipitation
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Features
• Displays lightning in 25, 50, 100 and 200 nm ranges
• Pilot selectable Cell and Strike modes360-degree view or 120-degree forward looking
• Updates lightning information every second
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Lightning Age
< 6 sec
6-60 sec
1-2 min
2-3 min
+
+
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00 Im
plem
enta
tion
• Heading stabilized• Powered by Avionics Bus 1
Strike Rate indicator details building or dissipating storms.
View on dedicated display HDG UPData NOT available on moving map.
CELL Mode uses a clustering pgm to ID center of activity.
Stormscope Views
360 Degree View Arc View
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Display
• MFD Map WX Page• MFD-Navigation WX Page• Choose Strike or Cell display (mode key)• Strike mode shows every discharge• Cell mode uses clustering algorithm to locate
cells• Displays an average STRIKE RATE per minute
– Updated every 5 seconds
• Periodically clear display to assist in evaluation
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POH Caution• Use only for WX avoidance NOT for penetration.
• If heading is changed, strikes/cells must be cleared manually after executing each turn
• Annunciator Alert – STRMSCP FAIL
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XM WX
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2. No Lightning Info at ranges less than 25
NM
31.
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XM LTNG Strikes
Cell Movement
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Break