I’m a little confused about how satellite communication works. My understanding is that there is a Line-of-sight wave from the user to the satellite and then a Line-of-sight wave from the satellite to the destination. I also have heard that whether a radio wave behaves like a ground wave or Line-of-sight wave depends on the frequency of the wave. It’s not intuitive to me why this is. It’s also not intuitive why we don’t communicate with ground waves. Is it because they are slower in spite of the fact that you’re substantially increasing the distance that the data has to travel?