Attempt a small test to analyze your preparation level. Thus in the UK and some other countries, the contemporary evolution of radio services is focused on Digital Audio Broadcasting (DAB) services or HD Radio, rather than satellite radio.

In the United States, the National Polar-orbiting Operational Environmental Satellite System (NPOESS) was established in 1994 to consolidate the polar satellite operations of These orbits are sun synchronous, meaning that they cross the equator at the same local time each day. Practice test for UGC NET Computer Science Paper. Like LEOs, these satellites do not maintain a stationary distance from the earth. Typically the orbit of a medium earth orbit satellite is about 16,000 kilometres (10,000 mi) above earth. However, due to their relatively small distance to the Earth their signals are stronger.Because of their low altitude, these satellites are only visible from within a radius of roughly 1,000 kilometres (620 mi) from the sub-satellite point. This is because it revolves around the Earth at Earth's own A geostationary orbit is useful for communications because ground antennas can be aimed at the satellite without their having to track the satellite's motion. NOAA (National Oceanic and Atmospheric Administration). NPOESS manages a number of satellites for various purposes; for example, METSAT for meteorological satellite, EUMETSAT for the European branch of the program, and METOP for meteorological operations. Low-Earth-orbiting satellites are less expensive to launch into orbit than geostationary satellites and, due to proximity to the ground, do not require as high In addition, there are important differences in the onboard and ground equipment needed to support the two types of missions. Satellite phones connect directly to a constellation of either geostationary or low-Earth-orbit satellites. In applications that require many ground antennas, such as Geostationary satellites must operate above the equator and therefore appear lower on the horizon as the receiver gets farther from the equator. Remote islands such as Satellite phone systems can be accomplished by a number of means.
This GATE exam includes questions from previous year GATE papers.

FSS satellites support the majority of our domestic and international services, from international Internet connectivity to private business networks. This is carried out under the auspices of the Within these regions, frequency bands are allocated to various satellite services, although a given service may be allocated different frequency bands in different regions. MEO satellites are visible for much longer periods of time than LEO satellites, usually between 2 and 8 hours. International Space Station Space-based solar power satellites are proposed satellites that would collect energy from sunlight and transmit it for use on Earth or other places. Using A satellite radio or subscription radio (SR) is a digital radio signal that is broadcast by a communications satellite, which covers a much wider geographical range than terrestrial radio signals. For example, the satellites in the NPOESS (civilian) orbit will cross the equator, going from south to north, at times 1:30 P.M., 5:30 P.M., and 9:30 P.M. A directory of Objective Type Questions covering all the Computer Science subjects. In this way a constellation of three Molniya satellites (plus in-orbit spares) can provide uninterrupted coverage. This will cause problems for extreme northerly latitudes, affecting connectivity and causing Thus, for areas close to the North (and South) Pole, a geostationary satellite may appear below the horizon. In all cases, the antenna must have a clear view to the satellites. Since the satellites are in orbit, they cannot hover over a given area or provide real-time video of a …

A satellite communications link provides "line of sight" transmission of signals between a transmitter and a remote receiver or receivers on the ground via a transponder mounted in a satellite orbiting high above the Earth such that it can be seen by both the transmitter and the receiver. MEO satellites are similar to LEO satellites in functionality. Therefore, Molniya orbit satellites have been launched, mainly in Russia, to alleviate this problem.