Propagation Predictions and Space Weather information
Solar Ham: Shows general space weather info (solar flare events, sunspot numbers, etc.) that impact on propagation.
Ionosonde Station Lists, Location Maps and ionosonde explanations
DIDBase Station list (uml.edu): Comprehensive list of ionosondes across the world. Contains latest and historical ionograms.
Map of European Ionosondes: Useful map, showing continental ionosondes. Please note that many of the links are not current.
Chilton (Oxon, UK) – latest ionogram (Requires registration on first attempt to access. On further attempt, when the log-in field appears, just type in the email address that you used for the registration, and press [ENTER]. Leave the ‘Password’ field blank.)