Read it now: the official International Shortwave Broadcast Guide with my article, "Crash Course of Shortwave Propagation and Space Weather" - This book is now on Amazon.

Here is my short link to the Amazon Kindle page:

http://g.nw7us.us/isbgw2016

#SpaceWX #SpaceWeather #Propagation #ionosphere #science #hamradio #hamr #ARRL
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