View source for Rocket-triggered lightning



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== rocket-triggered  lightning ==
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<div class="definition"><div class="short_definition">A form of artificial [[lightning discharge]] initiated with a [[rocket]] trailing  wire that may or may not be connected to the ground.</div><br/> <div class="paragraph">The first phase of the [[discharge]] is a unidirectional [[leader]] starting from the tip of the wire.  When the low end of the wire is not connected to ground, bidirectional leader development occurs  from both ends of the wire, similar to [[lightning]] initiation from aircraft. In the case of negative  [[space charge]] overhead (usual summer [[thunderstorm]] condition), a triggered lightning may only  be a positive leader or may become a sequence of [[dart leader]]&ndash;[[return stroke]] processes following  the initial positive leader. The latter is analogous to the subsequent return stroke process in a  negative [[cloud-to-ground flash]] with the initial positive leader being analogous to the first return  stroke. In the case of positive space charge overhead (usual winter storm condition), the triggered  lightning is a single negative leader.</div><br/> </div>
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