What’s with this FT-8 Presentation

Joe KCØOIO made a presentation on WSJT-X and FT-8 at the November 10, 2018 SARA meeting.  A copy of the presentation is available here for reference.   WHAT’S WITH THIS…

Propagation

The ARRL website has an excellent amount of material on propagation.  For starters, click on this link:  http://www.arrl.org/the-sun-the-earth-the-ionosphere