Current live conditions (radio conditions courtesy of The DX Robot): VHF AURORA 144MHz Es EU 70 MHz Es EU 50 MHz Es EU 144MHz Es NA Solar X-Rays Geomag Field
Welcome to the G7IZU Radio Reflection Detection pages.
Quick links (the main menu is at the top right of every page, or click the links or map thumbnails below)
Aurora map | Live solar data | SWPC Aurora forecast | The Sun Now | Global HF Radio Propagation Map
My blog posts can be found integrated on the left hand side of the page, and content links can be accessed from the drop-down lists above. Blog posts are auto-forwarded to my Twitter feed which is also available on the left side. The site is mobile-friendly and running on WordPress as pure CSS, so it should run quite fast.
The site is run by myself, Andy Smith, amateur callsign G7IZU from my home QTH in west Devon, England. The original web site was first created in 2005 in order for me to remotely view signals reflected from meteor trails and to see auroral radio signals by using radio receivers and some software displaying “waterfall” FFT plots. The primary transmitters used as the signal sources were the powerful VHF Band 1 analogue television transmitters based around Europe and further afield. Only the carrier-wave of the video signal was used as it was a powerful, stable signal. Following an extnded switch-over to digital TV signals only on UHF channels, the last of those AM VHF transmitters closed down in 2012, and since then I’ve been unable to utilise any other transmitter to the same extent. I breifly experimented with the signal from the Graves Satellite radar site in eastern France (see image above), but this proved unreliable due to nearby hills blocking too much of the reflection volume.
Between 2005 and 2011 I contributed automated meteor count data to RMOB (Radio Meteor Observing Bulletin) and spawned interest amongst a growing community of radio meteor observers around the world using Spectrum Lab as a tool for meteor observing. I also helped in the development of the Spectrum Lab software package by Wolf Büscher (DL4YHF) by requesting features useful to the radio meteor observing community. Above is a summary of my observations over that period. You can find some more pages from my old site in the archived pages section of this site.
THE PURPOSE OF THIS SITE
The main purpose for this site is now for providing live radio propagation maps. The maps are created automatically by Dave Edwards’ LiveMUF application which receives global amateur radio contact data via the radio and internet-based DX Cluster network. Contact plots are created in realtime with a short delay of a couple of minutes before they appear on the maps. The maps display data from the preceeding 30 minutes, with contacts older than 30 minutes being automatically removed.
Links to the maps are provided below. They also appear at the top of the page on the drop-down menu for Propagation Maps. The maps refresh automatically every minute, so there’s no need to refresh the pages. If you find the map is too large for your screen, try scrolling down a few lines, or try pressing and holding the keyboard CTL key and press the minus key to change the screen magnification. Use the CTL and the plus key to enlarge it again.
Follow me on Twitter @g7izu
Email: g7izu(at)television.f9.co.uk (manually type the address replacing (at) with @).