What is a communication satellite?
Communication satellite, or ComSat, is an orbit, an artificial device in a space used to create communication links. With preliminary radio transmission technologies and several orbiting formulas, ComSAT ensures a number of communication needs, including television broadcasting and communication with ships and aircraft. Communication satellite is particularly useful in cases where ground cables are uncomfortable or impossible to use. The United States in 1958 was not to be overcome in the space race, by launching project scores , which was used to hand over the recorded worldwide Christmas greeting from President Eisenhower. The first privately sponsored communication satellite, telstar , began in 1962 as a joint project between AT&T, Bell telephone, NASA, British general post office and French national post office. Telstar was placed in elliptical orbit and was the first communication satellite with direct relay. Geostationary satellites orbiting on the planet once a day, concentratedabove the Earth's equator. The start of Satcom 1 in 1975 led to the extensive use of geostationary ComSat for television broadcasting. Satellites with low countries used primarily for satellite phones in distant areas, work from about 248 km (400 km) above the ground and circle around the world once every 90 minutes. ComSat-Orbiting ComSat is a Soviet modification of the geostationary system and are used in television and radio communication, especially in high-width areas.
Recently, communication satellites have become popular in using broadband. In 2004, the XM and Siriusc radio stations were introduced at Publica. For the late 20th century, the broadband internet was broadcast using the ComSat network. This technology is particularly useful in remote or hard -to -reach regions where you can sometimes not get a connection to dialing.
When broadcasting a TV withThey often use two types of communication satellites. Direct broadcasting satellites (DBS) are used to broadcast television to domestic satellite dishes, as seen by the North American companies Directv and Dis Network and the United Kingdom (Great Britain) BSS. In the 21st century, India, Germany and Great Britain began working on television stations with the help of DBS technology.
Satellites with fixed services (FSS) are also used for television broadcasting, but more often send information from the parent organization to local network associated companies or show live events. ComSat FSS are also used to transmit lectures between schools and universities called "distance education". This type of communication satellite requires amno -greater food for well functioning and has largely overcome the popularity of DBS systems.
Comat became the main element of military communication around the world. The US Army is now strongly relying on the global command and control system (GCCS.) TentThe ComSAT system is highly safe and is used as a method of communication between the foundations, theaters of the event and the US headquarters. GCCS is also considered to be essential in collecting US intelligence information.
On computers, many are considered to be the most influential technology of the 20th century. Since satellite applications are still expanding, the sky is now dotted with hundreds of ComSat, often visible in the night sky. Many experts agree that it is not exaggerated to say that most communication in the 21st century is carried out through communication satellite networks.