Types Of Satellite Earth Station Ppt

At the earth stations that form the ground segment of space and satellite communications systems a variety of equipment is needed depending on.

Types of satellite earth station ppt. In this highly inclined orbit the satellite moves around the earth from pole to pole taking about 99 minutes to complete an orbit. 57 the power subsystems. It is normally at an altitude of less than 1000 km but could be as low as 160 km above earth which is low compared to other orbits but still very far above earth s surface. Bargellini in reference data for engineers ninth edition 2002.

Earth stations with large antennas 10 to 60m. Many different types of earth stations are required for satellite communications the size of the earth station s antenna is the primary feature distinguishing one earth station from another. At the pole satellite crosses over to the nighttime side of earth. As the satellites orbit the earth turns underneath.

In general earth stations receive the baseband signals in one of the following forms. It is also used with double reflector earth station antennas and is being used increasingly with small receive only earth station antennas. With reflector type antennas the feeder connecting the feed horn to the transmit receive equipment must be kept as short as possible to minimize losses. A function of the station b type of service c frequency bands used d transmitter e receiver and f antenna characteristics.

Up link frequency is the frequency at which ground station is communicating with satellite the satellite transponder converts the signal and sends it down to the second earth station. Sometimes the same earth station can be used for both transmitting and receiving purposes. Most satellite use frequency bandwidth through from 5 92 to6 4ghz from transmission of data from earth to the satellite and a frequency bandwidth from 3 7 to 4 1ghz for transmission from satellite to the earth. The transmitting earth station transmits the information signals to satellite.

The power subsystem consists of solar panels and backup batteries that generate power when the satellite passes into the earths shadow. The types are grouped under three headings. During one half of the orbit the satellite views the daytime side of the earth. Operation data to the earth control station and receives the earth control stations commands to perform equipment operation adjustments.

Low earth orbit low earth orbit leo a low earth orbit leo is as the name suggests an orbit that is relatively close to earth s surface. Geoffrey hyde pier l. Long earth station short earth station and very small aperture vsat earth station. Water discovered on moon 16.

The two stations can use a satellite as a relay station for their communication one earth station transmits the signals to the satellite.