How Solar Indicies Work: SFI, SN, A &…

Here's a look at the numbers used to understand the Sun and what it's doing to HF propagation. Introduces the terms MUF, SFI, SN, A and K. Subscribe: https://youtube.com/user/davecasler. Ask Dave Playlist: https://goo.gl/inaQeB. Tip Jar:…