A geostationary satellite can be accessed using a dish antenna aimed at the spot in the sky where the satellite hovers. The orbits take the satellites over, or nearly over, the geographic poles. Each revolution takes approximately 90 minutes to a few hours. The fleet is arranged in such a way that, from any point on the surface at any time, at least one satellite is on a line of sight. The entire system operates in a manner similar to the way a cellular telephone functions.
Some satellites revolve around the earth in elliptical orbits .
They require directional antennas whose orientation must be constantly adjusted to follow the satellite's path across the sky. Bringing you the best technology specific search engines.