Transcript D. Pokhsraryan, Lightning Detection at Aragats Station

Lightning Detection at Aragats Station
Karen Arakelyan, David Pokhsraryan, David Sargsyan,
Alikhanian National Laboratory, Armenia.
Boltek EFM-100
Electric Field Monitor
Electric Field Range:
Accuracy:
Response Time:
-20 kV/m to +20 kV/m
+/- 0.05 kV/m
0.1 seconds
Analog Data Output:
1V per kV/m
Interface:
Fiber optic cable to USB/RS232
Field Mill Block Diagram
Monitoring Software
Log date, time and distance of nearby lightning.
Monitor lightning up to 38 km away.
Detect the high electric field conditions which precede lightning.
Boltek
Storm Tracker Lightning Detection System
Direction-finding antenna provides direction
information .
Storm distance is calculated from received
signal strength.
Special processing in software reduces the
effects of strike-to-strike energy variations
providing more accurate distance information.
Lightning Power Spectrum
The bandwidth of the our system is 100-700 kHz
Lightning Monotoring System
• Plots the real time data on a map
• Allows to replay the previous archived data in accelerated time.
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Timestamp in seconds
since midnight
Timestamp in
milliseconds
Bearing to strike
Distance to strike
Strike type -> CG or IC
Strike polarity -> positive
or negative
Custom Software
For offline analysis a custom software was developed under LabView.
•Extract data from archived
file
•Create strike counts time
series
•Select a radius of monitoring
•Filter data by type
( CG+,IC+,IC-,CG-)
Event on 23.08.2010
Event on 26.08.2010
Event on 26.08.2010
Event on 23.08.2010
CONCLUSIONS
The lightning detection system and electric field meter facilities are operating at
Aragats mountain and providing additional data to those obtained by particle
detectors for investigation of thunderstorm events.
These data are storing in the central file server and are accessible for monitoring
and processing.