Current ionograms & critical frequencies
The links below provide information on ionospheric stations and data from around the world.
Please note the RSGB is not responsible for the content of external websites.
- Worldwide ionograms Juliusruh
- Kiruna magnetogram
- Lycksele magnetogram
- Dourbes (Belgium)
- Current Ionospheric Conditions for a range of locations in Australasia, North America and Europe
- USAF site ionogram data for world-wide locations – daily data
- USAF site ionogram data for world-wide locations – monthly data
- Dias – European Digital Upper Atmosphere server. Registration required
- Interpreting Digital Ionosondes- A brief tutorial