tag:blogger.com,1999:blog-9071048343455395511.post9193372076634179236..comments2024-03-24T22:03:31.205+00:00Comments on Roger G3XBM's (Mainly) Amateur Radio Blog: NoV permits for operation below 9kHzRoger G3XBMhttp://www.blogger.com/profile/13673890140751539870noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9071048343455395511.post-23070837260119030762010-03-09T11:03:05.299+00:002010-03-09T11:03:05.299+00:00They monitor sferic activity to track approaching ...They monitor sferic activity to track approaching storms.Roger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-11114516159373010242010-02-26T07:10:08.125+00:002010-02-26T07:10:08.125+00:00Wow! Good work. Reading other posts has made me re...Wow! Good work. Reading other posts has made me realise that VLF/ELF is current. I'm very interested in what the met offices uses this spectrum for - I guess RX monitoing of the earth's natural waveguide around 8khz to get an idea of atmospheric electrical activity.<br /><br />73 G8JGOG8JGOhttps://www.blogger.com/profile/00505492102212197876noreply@blogger.com