The following lines were added (+) and removed (-):
== Ionosphere Layers ==Scientists have divided the ionosphere into layers, with each layer having specific behavioral characteristics dependent on solar radiation. There are three main regions within the ionosphere# D Region - Causes attenuation of RF signals, low frequencies are attenuated more than higher ones. # E Region - HF radio signals are reflected here back towards the Earth# F Region - Also reflects HF signalsTechnically, the signals are not "reflected" as in a bounce, but they are bent around so that they return to the earth. So it is a "bend" rather than a "bounce."