https://ky6r.wordpress.com/2015/06/03/arrl-propagation-and-radio-science-by-eric-nichols-kl7aj/

A really nice review of my book. I've been really gratified by all the interest I've been able to generate with this. Now, if we could only actually DO something about the ionosphere.

Eric

 

Judging from the predictions of even lower sun activity not much, it's a Propagation Winter. The sun is going to sleep.

http://sidc.oma.be/html/cmap_animator.html