Loading...
Please wait, while we are loading the content...
Similar Documents
The temporal structure of rf radiation from lightning
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Levine, D. M. |
| Copyright Year | 1978 |
| Description | Radiation from lightning in the RF band from 3-300 MHz has been examined. Simultaneous measurements were made of the RF radiation from lightning together with records of fast and slow field changes. Continuous analogue recordings were made with a system having 300 kHz of bandwidth in the RF channels. The temporal history of RF radiation of these frequencies consists of a sequence of discrete pulses. The data reveal a distinct pattern in the radiation which is independent of frequency and depends on the type of lightning flash: Cloud-to-ground flashes are characterized by an abrupt beginning associated with the stepped leader, whereas cloud-to-cloud flashes begin with a slower train of noise pulses more typical of the end of both types of flash. An exception to this pattern is cloud-to-ground flashes preceded by a breakdown phase, in which case the radiation begins like a cloud-to-cloud flash. |
| File Size | 8696743 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780014357 |
| Archival Resource Key | ark:/13960/t1bk65k1g |
| Language | English |
| Publisher Date | 1978-04-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Electromagnetic Radiation Pulse Amplitude Radio Frequencies Pattern Recognition Lightning Electric Discharges Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
