Note: Certain pages within the "HF Systems" category are updated frequently. Excluding warning notifications, update intervals will be specified where applicable.
To refresh the page, hold down the "SHIFT" key and click the "Refresh" or "Reload" button on your browser to refresh this page to obtain latest data.
HF Propagation Conditions
These pages provide general propagation advice for HF communicators. Information available includes inferred global propagation conditions, real time HF fadeout coverage charts, regional ionospheric vertical MUF maps and Hourly Area Prediction charts.
- derived TEC Maps
- X-Ray Flux values
- background information on HF propagation
- a (7 MB)
on the effects of space weather on HF communications