Re: [TCML] Latest TC results, and one strange one....

[Rob Byron <mustang_5l87@xxxxxxxxxxx>]

I think this is the same as when you take a video with the spark gap in frame. I notice that bright pulsing streaks follow the spark gap vertically up the screen. 

Rob. 

________________________

On 2009-11-24 08:31:06 -0700 Bert Hickman <bert.hickman@xxxxxxxxxx> wrote:

> 
> Hello Peter,
> 
> It looks like you may be seeing artifacts from the camera's optical 
> system or (more likely) the camera sensor and electronics. These "ghost" 
> artifacts often show up when electronically photographing bright sparks 
> or lightning. A careful examination of the mystery sparks in your video 
> shows that they are displaced, much fainter, duplicates of much brighter 
> spark segments below. They are mostly showing up only during the 
> higher-current (much brighter) ground strikes. Similar, vertically 
> displaced "ghost images" of your main spark gap can be seen as fainter 
> "speckles" located in various positions above the main gap in other 
> video clips of your coil in operation.
> 
> For example, in your GIF referenced below, the overall shape of the 
> spark channel, including the split section of the main channel, can 
> easily be matched up between the "Weird Spark" and the bright ground 
> strike below. Although the match-up is not as evident (since the lower 
> portion of the ground strike is off-frame) similar correspondence with 
> segments of the ground strike could be done for weird segments 2, 3, and 
> 4.
> 
> Ghost images are most often seen during video captures of lightning, but 
> sometimes occur with TC's, especially during high-current ground 
> strikes. Some similar examples with lightning and ways to recognize this 
> phenomenon can be found here:
> 
> http://stormhighway.com/videoghost.shtml
> 
> Bert
> 

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