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| Titel |
On 3D detection of lightning discharges and associated events with a small scale interferometric network of radio receivers |
| VerfasserIn |
A. Mezentsev, M. Füllekrug |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250061744
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| Zusammenfassung |
| Lightning discharges cause different phenomena in the atmosphere such as sprites, gigantic
jets and runaway electron beams. Lightning discharges and their associated events exhibit
characteristic electromagnetic signatures in a wide range of frequencies. These
electromagnetic signatures are detected and recorded with radio receivers for a detailed
investigation.
This work uses a small scale network of wide band digital radio receivers, which record
vertical electric field strengths in the frequency range from ~ 4 Hz to ~ 400 KHz, with a
sampling frequency of 1 MHz, an amplitude resolution of ~ 35 μV/m and a timing accuracy
of ~ 12 ns.
The small scale interferometric network consists of eight radio receivers, which are
separated by distances ranging from 1 km up to 30 km. The network was deployed in
Southern France from July to September 2011. Three additional receivers served as remote
reference measurements at distances from 300 km up to 1000 km. The small scale
interferometric network enables the detection of lightning discharges and associated
events in three dimensions for nearby thunderstorms which are less than 500 km
away.
The network operated successfully during several nearby sprite producing thunderstorms.
The recorded waveforms are very consistent and exhibit small time delays which reflect the
propagation of the electromagnetic waves across the network. These time delays are
used to determine the bearing and elevation angle of the arriving electromagnetic
energy. The first results obtained with the interferometric network are presented. |
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