Very low frequency radio observations of lightning dischargesEntry ID: K069_2008_2009_NZ_2
Abstract: The AARDDVARK/WWLLN Very Low Frequency (VLF) Radio Sensor was installed at Arrival Heights from 10-15 December 2008 by Dr Craig J. Rodger and Dr. James Brundell as part of Antarctica New Zealand Event K069a. The sensor measures the magnetic field in the Very Low Frequency radio range (~500 Hz-50 kHz), and passes it to a PC which processes the data for the experiments. The primary experiment is the ... AARDDVARK observations. The secondary experiment, WWLLN, uses exactly the same VLF feed but processes it to detect the radio-wave pulses from lightning. WWLLN observations are sent to a central processing computer to determine the time and location of lightning pulses all over the globe. The World Wide Lightning Location Network (WWLLN) is an experimental Very Low Frequency (VLF) network of sensors being developed through collaborations with research institutions across the globe. The network exploits the considerable electromagnetic power radiated by lightning as "sferics" present in the VLF band. By combining radio-pulse observations from at least 5 stations, the WWLLN central processing computers can determine the location of the original lightning discharge. As the radio-pulse observations are immediately sent back across the internet to the central processing computers locations are generated within ~10 s of the discharge, and thus near real time. There are currently 33 active VLF receiving stations operating in the VLF World-Wide Lightning Location Network as of December 2008, including the "Scott Base" measurements made at Arrival Heights. WWLLN observations are continuously transmitted to one of the WWLLN primary servers, in this case flash.ess.washington.edu at the University of Washington, Seattle, USA.
Start Date: 2008-12-24
Quality The data is available from the WWLLN.
WWLLN Monthly CDs containing all stroke locations over the whole world for 1 month. These are mailed to subscribers each month, or they may opt to download the data weekly. Archival data are available for sale from January 2004 to the present. Our site hosts receive a free monthly subscription.
WWLLN Data are available via internet with cadence every 10 minutes for research purposes from the University of Washington, or with a cadence of as fast as every minute (i.e. in realtime) from our commercial reseller. Contact Prof. Holzworth for more info.
Data Set Progress
Phone: +64 03 479 4120
Fax: +64 03 479 0964
Email: crodger at physics.otago.ac.nz
Department of Physics University of Otago PO BOX 56
Country: New Zealand
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Antarctica New Zealand Private Bag 4745
Country: New Zealand
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2009-03-18
Last DIF Revision Date: 2010-09-20