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Measurement and Verification of Lightning Return Stroke Velocities Using High-Speed Cameras

This study investigates the two-dimensional velocity of lightning return strokes utilizing a high-speed camera and an avalanche photodiode array. Data collection involves observations through high-speed imagery, electric field measurements via a flat plate antenna, and processing with specialized software. By integrating Lightning Mapping Array (LMA) data, we aim to provide accurate linear velocities of lightning return strokes and compare them to historical calculations. This research enhances our understanding of lightning behavior and its implications for safety and technology.

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Measurement and Verification of Lightning Return Stroke Velocities Using High-Speed Cameras

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  1. Measurement and Verification of Lightning Return-Stroke Velocities Samantha Tabor Matthew Jay Genesis LangumMentor: Dr. Danyal Petersen

  2. What Are We Investigating? • We will be using a high speed camera and an avalanche photodiode array to estimate the two-dimensional velocity of lightning return strokes. 1 2 3 4

  3. How Will We Do This? • Observations and data gathering via: • High speed camera • Avalanche photo diode array • Flat plate antenna (electric field) • Data processing and viewing • PhotronFastcam Viewer 3 • Waveform viewing application (DF32) Avalanche Photo Diode High Speed Camera Flat Plate Antenna

  4. How Will We Do This? • Combine this with LMA data and possibly lightning detection network • Provides linear velocities of lightning return-strokes • Compare velocities to past calculations

  5. Why Is This Important? • Inconsistent return-stroke velocity measurements • Further understanding of lightning behavior • Aid in future scientific discoveries • Direct implication for other projects • Ex. Defense Advanced Research Projects Agency (DARPA) • Ex. Better engineering of strike-prone equipment

  6. Our Goals Analyze as many return strokes as time permits Have at least one example of positively-charged lightning Provide useful data for further study

  7. Selected References Boyle, J. S., and R. E. Orville, 1976: Return stroke velocity measurements in multistroke lightning flashes. J. Geophys. Res,, 81(24), 4461-4466. Chowdhuri, et. al., 2003: Parameters of Lightning Strokes: A Review. IEEE Trans. Power Delivery, 20(1), 346-358, doi:10.1109/TPWRD.2004.835039. Idone, V. P., and R. E. Orville, 1982: Lightning return stroke velocities in the thunderstorm research international program (TRIP). J. Geophys. Res., 87(C7), 4903-4915. Mach, D., and W. D. Rust, 1989: Photoelectric return stroke velocity and peak current estimates in natural and triggered lightning. J. Geophys. Res., 94(D11), 13237-13247. Nakano, et al., 1988: Measurements of the Velocity Change of a Lightning Return Stroke With Height. Proc. 1988 International Aerospace and Ground Conf. on Lightning and Static Electricity, Oklahoma City, OK, National Oceanic and Atmospheric Administration, 84-86. Rakov, V., 2007: Lightning return stroke speed. J. Lightning Res., 1, 80-89. Wagner, C.F., 1963: The Relation Between Stroke Current and the Velocity of the Return Stroke. IEEE Trans. Power Appar. Syst., 82, 609-617, doi:10.1109/TPAS.1963.291375.

  8. Any Questions?

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