Telescopic images of sprites show a wide variety of generally vertical but also slanted fine structure, including branching tree‐like shapes and well defined but isolated columns, with transverse spatial scales ranging from tens of meters to a few hundred meters at ∼60–85 km altitude. Simultaneous analysis of radio atmospheric and lightning data indicates that specific columnar regions are selectively excited by successive discharges.
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Gerken et al. (2000) studied this question.
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