1. Satellites monitor the Earth and its Atmosphere in a variety of ways.
2. The radar altimeter bounces signals off the planet's surface to build a profile of the Earth's topography.
3. Atmospheric water vapour and cloud cover are measured by the infra -red scanner, which detects infra red light from the Atmosphere.
4. The antenna transmits information to receiving stations on Earth, and solar panels provide the electricity needed to power the satellite.