Radio astronomy and lightning

Blue Hell · Posted: Sat Sep 01, 2018 3:28 am Post subject: Radio astronomy and lightning

The stepwise ionisation of the air preceding a lightning flash was captured in 3D by the LOFAR radio telescope in The Netherlands.

https://www.rug.nl/news/2018/02/radio-telescope-lofar-shows-how-lightning-grows?lang=en

https://www.kvi.nl/~scholten/Lightning/KVI-ProjectDescription-crackling-v1.pdf

PHOBoS · Posted: Sat Sep 01, 2018 5:30 am Post subject:

ah my memory was wrong,. Somehow I thought it started from the ground up and than the big flash came down from the sky
but it is the other way around.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Although it actually seems to be a bit all over the place. nice to see it in '3D'.

so, lightning simulation wren module next ? Laughing

Blue Hell · Posted: Sat Sep 01, 2018 5:41 am Post subject:

Actually

after reading about lightning in the VPRO tv-guide Shocked

... I was thinking about making a module, so googled a bit for scientific lightning models .. and then stumbled over the above.

The PDF has a graph about breakdown and runaway voltages .. but that is all I could find sofar ... will have to search a bit more for a module.

Edit: there should be some model for forking .. it was used to predict oil streams in wells Rolling Eyes

Blue Hell · Posted: Sat Sep 01, 2018 8:05 am Post subject:

Found some code for laplacian growth simulation : https://www.cc.gatech.edu/grads/m/mluffel/2009/fall/cs7001/dendrites/

Will now try to make something with that :-)

Blue Hell · Posted: Sun Sep 09, 2018 12:34 pm Post subject:

Okay .. now think about how it could make sound ...