Where in the atmosphere is the ionosphere found?

The ionosphere is located within the Earth's atmosphere, extending from approximately 30 miles (48 kilometers) to about 600 miles (1,000 kilometers) above the Earth's surface. It overlaps with the upper part of the mesosphere and extends into the thermosphere. This region is characterized by a high concentration of ions and free electrons, which are created by solar radiation. The ionosphere plays a crucial role in radio wave propagation and atmospheric chemistry.