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4 results for “Lightning attachment”
Related data of CG lightning attachment process
<p>More and more optical records have exhibited that multiple upward leaders (MULs) occur frequently on a structure in the flash attachment process. An interesting issue is why a structure can continue to launch an upward leader (UL) after the first one appears. This phenomenon is analyzed in the present paper. Considering the influence of the leader behaviors on the ambient electric field, an improved 3-D fine-resolution lightning attachment model with MULs is established to simulate cloud-to-ground flash events with diverse leader spatial morphologies. The simulation results show that MULs may initiate almost simultaneously or with an obvious delay and the variation range of UL length is large. From this, the flash events of lightning terminating on a structure are divided into four scenarios and each scenario is analyzed. It can be found that the spatial location of the downward leader, the length and propagation direction of the first UL and the time interval from the inception of the first UL to final jump significantly affect the electric fields at top corners of structure and further affect the inception of the second UL. Based on qualitative analysis, four factors are proposed to explain why the above four scenarios happen.</p>
Supplementary data for "Upward leaders from instrumented lightning rods competing to connect a downward leader during a lightning attachment process"
<p>High-speed videos of the lightning attachment to lightning rods observed by the Vision Reserch Phantom V12 and V711 cameras. See Instructions file to play the videos.</p>
Data Used in "Close view of of the lightning attachment process unveils the streamer zone fine structure"
<p>This page contains high-speed video files as .gif and .cine files, for the complete video of Figure 2 (Movie S1 and S3). It also contains the video (Movie S2) from a second high-speed (Phantom V711) looking in a different direction that saw other UUL leaders not registered by the Phantom V2012 camera. There is also an Excel file containing the data analysis. The data uploaded here is sufficient to reproduce the results of the paper titled "Close view of of the lightning attachment process unveils the streamer zone fine structure", submitted for publication in Geophysical Research Letters.</p> <p><em>Instructions to watch the videos</em>: <strong>Movie S1.cine </strong>and<strong> Movie S2.cine:</strong></p> <p>Download and use the software Phantom Camera Control (PCC) available at:</p> <p><a href="https://www.phantomhighspeed.com/resourcesandsupport/phantomresources/pccsoftware">https://www.phantomhighspeed.com/resourcesandsupport/phantomresources/pccsoftware</a></p> <p>The Phantom Camera Control (PCC) software is compatible with Windows 7 Pro and Windows 8.1 and Windows 10, for both 32 and 64-bit operating systems.</p>
Related data of CG lightning attachment process
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