The following lines were added (+) and removed (-):
== Skip Phenomena ==The "solar wind", generated by the sun's explosions, impacts the earth's upper atmosphere, called the ionosphere. When it does, ionized layers (called "F2" and "F1") form in the ionosphere between about 160 and 500 km above the earth's surface. The "F2" layer acts like a mirror to a 10 meter radio signal. The "F2" reflects the signal back to earth, thousands of kilometers beyond your antenna.