A new graphing tool has been developed by Jim, G3YLA of the Propagation Studies Committee to show the near real-time critical frequency over the UK and the predicted maximum usable frequency over different paths.
A feature on how to use the free tool appears in the July issue of RadCom.
But if you want to try the critical frequency tool on your own it can be found at www.convectiveweather.co.uk/ionosphere and there are useful help files to get you going.
Source:RSGB
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