A geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers (22,300 miles) directly over the equator, that revolves in the same direction the earth rotates (west to east).
Application: Geostationary satellites appear to be fixed over one spot above the equator.Receiving and transmitting antennas on the earth do not need to track such a satellite. These antennas can be fixed in place and are much less expensive than tracking antennas. These satellites have revolutionized global communications, television broadcasting and weather forecasting, and have a number of important defense and intelligence applications.
NASA science spacecraft designed The Global Geospace Science (GGS) Polar Satellite to study the polar magnetosphere and aurora Sensors on the spacecraft. Technically, which gathered multi-wavelength imaging of the aurora, and measured the entry of plasma into the polar magnetosphere and the geomagnetic tail, to study the flow of plasma to and from the ionosphere, and the deposition of particle energy in the ionosphere and upper atmosphere.
Data from the Polar satellites support a broad range of environmental monitoring applications including forecasting, weather analysis, climate research and prediction, global sea surface temperature measurements, atmospheric soundings of temperature and humidity, ocean dynamics research, volcanic eruption monitoring, forest fire detection, global vegetation analysis, search and rescue, and applications in many other fields.
Application of satellites
Satellites can be used to get information about astronomical events.
Satellites helps in weather forecasting.
It helps in television and radio communication.
It helps to find locations during combat situations.