The Lightning Radiation Field Spectra of Cloud Flashes

dc.contributor.author	Sonnadara, D.U.J.
dc.contributor.author	Cooray, V.
dc.contributor.author	Fernando, I.M.K.
dc.date.accessioned	2011-10-05T07:04:01Z
dc.date.available	2011-10-05T07:04:01Z
dc.date.issued	2006
dc.identifier.citation	IEEE Transactions on Electromagnetic Compatibility, 48 1 (2006) 234-239
dc.identifier.uri	http://archive.cmb.ac.lk:8080/xmlui/handle/70130/199
dc.description.abstract	Electric radiation fields produced by lightning cloud flashes have been analyzed using Fourier methods to obtain amplitude spectra for frequencies in the range of 20 kHz to 20 MHz. Time to thunder measurements were used to extract the distances to the cloud flashes from the measurement site. The spectra were generated by analyzing the first 10ms time window of cloud flashes with 10 ns sampling resolution, and they show f−1 frequency dependence up to 2 MHz followed by f−2 dependence and higher for frequencies above 2MHz. The results agree very well with previous measurements carried out for individual pulses produced by various lightning processes. By utilizing digital filters, it has been shown that measurements taken with narrowband filters agree with the results produced under wideband measurements.	en_US
dc.language.iso	en	en_US
dc.subject	Lightning Radiation	en_US
dc.subject	Cloud Flashes	en_US
dc.title	The Lightning Radiation Field Spectra of Cloud Flashes	en_US
dc.type	Research abstract	en_US