[SFDXA] Sky and Telescope Sunspot Count Article

[Hank Phillips]

Check this out:

 

http://www.skyandtelescope.com/astronomy-news/how-astronomers-count-sunspots
15022016513

 

Although it is from an astronomy standpoint, we still use these data as
predictors of future propagation.

 

Vy 73,

Hank

AA4HP