ionosphere

The ionosphere is a layer of Earth's atmosphere, located between about 30 miles (48 kilometers) and 600 miles (965 kilometers) above the surface. It's filled with charged particles, created by the sun's ultraviolet radiation. This layer plays a crucial role in radio communication, as it can reflect certain radio waves back to Earth, allowing long-distance transmissions. The ionosphere also affects satellite signals and is involved in atmospheric phenomena like the Northern Lights. Its conditions vary throughout the day and year, influenced by solar activity, making it an important area for scientists studying weather and communication technology.