Paper Accepted in Earth and Space Science

Timothy J. Lang (ST11) is a coauthor on an article called “Measurements of size and electrical charges carried by precipitation particles during RELAMPAGO field campaign,” which was recently accepted in the journal Earth and Space Science. This study analyzed three-dimensional observations from the NASA Lightning Mapping Array (LMA), which was deployed within north central Argentina during 2018-2019, combined with ground-based observations of raindrop size and electrical charge. Based on the results, it was found that the bulk of electrical charge was carried on mainly large raindrops, and that variability of the predominant sign of charge carried on the raindrops was related to the vertical electrical structure of the thunderstorm as inferred from the LMA. The results demonstrate that observations of precipitation charge can validate the use of LMAs to retrieve thunderstorm charge structure. The paper also featured as coauthors current/former NASA collaborators at University of Alabama in Huntsville (UAH), including Matt Wingo, Bruno Medina, and Gregory Melo. The study, along with several other recent studies resulting from the Argentinian LMA, is the result of an international agreement between NASA and the National University of Cordoba that originally brought the LMA to Argentina for approximately 6 months during 2018-2019. The data from NASA LMAs continue to play an important role in validation of lightning observations from the Geostationary Lightning Mapper (GLM) and the International Space Station Lightning Imaging Sensor (ISS LIS).

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Lang relampago device

(a) Photograph and (b) a schematic of the experimental device. The device is formed by seven bronze induction rings 10 cm in diameter, 5 cm high, and 1 mm thick. Three of the rings (5) are connected to an inverting current-voltage amplifier circuit (6). The other four rings (4) are connected to ground. The Teflon tube (7) with the rings and the amplifier circuit are located inside an aluminum cylindrical structure (1, 2, 3, and 8)

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