Search Results - "Saba, Marcelo MF"

Upward lightning flashes characteristics from high‐speed videos by Saba, Marcelo M. F., Schumann, Carina, Warner, Tom A., Ferro, Marco Antonio S., Paiva, Amanda Romão, Helsdon, John, Orville, Richard E.

“…One hundred high‐speed video recordings (72 cases in Brazil and 28 cases in USA) of negative upward lightning flashes were analyzed. All upward flashes were…”
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Observations of bidirectional lightning leader initiation and development near positive leader channels by Warner, Tom A., Saba, Marcelo M. F., Schumann, Carina, Helsdon, John H., Orville, Richard E.

“…Based on the analysis of high‐speed optical and electric field change data, we present three observed cases in which a naturally occurring bidirectional…”
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High-speed video observations of natural cloud-to-ground lightning leaders – A statistical analysis by Campos, Leandro ZS, Saba, Marcelo MF, Warner, Tom A, Pinto, Osmar Jr, Krider, EPhilip, Orville, Richard E

“…The aim of this investigation is to analyze the phenomenology of positive and negative (stepped and dart) leaders observed in natural lightning from digital…”
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Frequency distributions of some parameters of negative downward lightning flashes based on accurate-stroke-count studies by Ballarotti, Maurício G., Medeiros, Claudia, Saba, Marcelo M. F., Schulz, Wolfgang, Pinto Jr, Osmar

“…This paper presents some parameters of negative cloud‐to‐ground lightning flashes in terms of frequency distribution. All data are based on so‐called…”
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Visible channel development during the initial breakdown of a natural negative cloud-to-ground flash by Campos, Leandro Z. S., Saba, Marcelo M. F.

“…GPS time synchronized high‐speed video records (at 4000 frames per second) and electric field waveforms are discussed for one stepped leader of a negative…”
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Positive leader characteristics from high-speed video observations by Saba, Marcelo M. F., Cummins, Kenneth L., Warner, Tom A., Krider, E. Philip, Campos, Leandro Z. S., Ballarotti, Mauricio G., Pinto Jr, Osmar, Fleenor, Stacy A.

“…Based on analyses of high‐speed video recordings of cloud‐to‐ground lightning in Brazil and the USA, the characteristics of positive cloud‐to‐ground (+CG)…”
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Bipolar cloud-to-ground lightning flash observations by Saba, Marcelo M. F., Schumann, Carina, Warner, Tom A., Helsdon Jr, John H., Schulz, Wolfgang, Orville, Richard E.

“…Bipolar lightning is usually defined as a lightning flash where the current waveform exhibits a polarity reversal. There are very few reported cases of…”
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On [beta] sub(2) stepped leaders in negative cloud-to-ground lightning by Campos, Leandro ZS, Saba, Marcelo MF, Philip Krider, E

“…In their seminal lightning studies using streak cameras, Schonland et al. (1938) identified four negative stepped leader events that they term "[beta] sub(2),"…”
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Lightning current observation of an altitude-triggered flash by Saba, Marcelo M.F., Pinto, Osmar, Solórzano, Natália N., Eybert-Berard, André

“…In this work we present some current parameters of an altitude-triggered lightning using a 30-m insulating cable of Kevlar. It was triggered during the summer…”
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Detection of M-components and return strokes in upward and downward lightning flashes by Paiva, Amanda R., Saba, Marcelo M. F., Naccarato, Kleber, Schumann, Carina, Jaques, Robson, Ferro, Marco A. S.

“…This work aimed to investigate which pulses (M-components and/or subsequent return stroke) of the upward lightning are detected by BrasilDAT lightning location…”
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Waveform analysis of cloud-to-ground flashes as detected by fast e-field antennas and lightning location systems: On the way to precisely estimate the stroke peak current by Naccarato, Kleber P., Saba, Marcelo M. F., Schumann, Carina, Pinto, Osmar, Medeiros, Claudia, Heckman, Stan

“…BrasilDAT network is an EarthNetworks Total Lightning System (ENTLS) that detects both intra-cloud and cloud-to-ground discharges. Multiple time-of-arrival…”
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