This page will update automatically every 3 minutes. There is no need you click the "refresh" button of your browser. If automatic refresh doesn't work for you then look here.
IMPORTANT: YOU MAY NOT use this map/list in your own WEB pages. I will appreciate links to this WEB page, but you are not allowed to show the map/list in your site !
MUF shown for the ionosondes is not real-time, but the calculation is based on the most recent foEs & h'Es values provided. If a certain ionosonde has not provided data for the past 30 minutes then it will be shown with a cross on it.