Satellite-based VHF lightning detection is characterized at GPS orbit by using a VHF receiver system recently launched on the GPS SVN 54 satellite. Collected lightning triggers consist of Narrow Bipolar Events (80%) and strong negative return strokes (20%). The results are used to evaluate the performance of a future GPS-satellite-based VHF global lightning monitor. INTRODUCTION Over the last f...

This paper presents an evaluation and comparison of four input devices for percussion tasks: a standard tom drum, Roland V-Drum, and two established examples of gestural controllers: the Buchla Lightning II, and the Radio Baton. The primary goal of this study was to determine how players’ actions changed when moving from an acoustic instrument like the tom drum, to a gestural controller like th...

The electrodynamic properties of intense oceanic lightning discharges are compared to intense continental lightning discharges. Particularly intense negative lightning discharges with absolute charge moments > 2 kC·km occur more often over the oceans than over the continents during April 1998. Intense continental lightning discharges, with negative and positive polarity, and intense positive oc...

The electrodynamic properties of intense oceanic lightning discharges are compared to intense continental lightning discharges. Particularly intense negative lightning discharges with absolute charge moments > 2 kC·km occur more often over the oceans than over the continents during April 1998. Intense continental lightning discharges, with negative and positive polarity, and intense positive oc...

A broadband radio interferometer to investigate the location of fast-moving electromagnetic (EM) sources emitted from lightning discharges has been designed. A sequential triggering technique was applied to the system for recording the data of broadband electromagnetic pulses from 25 to 250 MHz. Once the electromagnetic pulse is detected and its amplitude exceeds a threshold level, the triggeri...

Prior studies have noted a strongly nonlinear enhancement of lightning flash rates with increasing cloud height. Here we report a related observation, of a tendency for increased intracloud (IC)-discharge radioemission power versus increased height of the electrified cloud. We find that there is a strong statistical increase of effective radiated power (ERP, or isotropic peak power radiated fro...

Hettiarachchi, P. 2018. Measurements of X-Ray Emission from Laboratory Sparks and Upward Initiated Lightning. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1618. 58 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0204-1. In 1925 Nobel laureate R. C. Wilson predicted that high electric fields of thunderstorms could accelerate ele...

This paper presents the preliminary results from CG lightning characteristics analysis over three large urban areas in southeastern Brazil: the São Paulo metropolitan area, Vale do Paraíba Paulista and the Campinas metropolitan area. A lightning dataset of about 310,000 flashes was obtained by the Brazilian lightning detection network during the months of December, January and February from 199...

This research addresses a seldom studied aspect of lightning—lightning cessation. Holle et al. (1992) found that the majority of casualties occur either during thunderstorm initiation or during dissipation. Between these times, when the threat of lightning is obvious, there are fewer casualties. Thus, the initiation and cessation of lightning activity are critically important periods. Florida i...