Isn’t that a good thing, when it comes to trying to transmit? I mean doesn’t increased sun activity make radio transmission poor?
No, not if you're relying on refraction off the ionosphere. Most long haul RF transmissions require refraction off the E or F layers in the atmosphere. The level of ionozation determines what the maximum usable frequency is. That determines how far the propogation works (very simplified version of mechanism).
ACK! NO! The sun spots and spurts excite the ionosphere and make it all shiny and reflective. The MUF (maximum usable frequency) climbs off the scale at a real peak. Otherwise, high frequency radio waves just leave earth to annoy civilizations hundreds of light years away.
Sunspots trap the radio waves to the planet and let you talk with very low power all over the globe.
Thats a Good Thing(tm). /johnny