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A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military ...
Syncom 2 was the first communications satellite in a geosynchronous orbit. It revolved around the Earth once per day at constant speed, but because it still had north–south motion, special equipment was needed to track it. [19] Its successor, Syncom 3, launched on 19 July 1964, was the first geostationary communications satellite. Syncom 3 ...
Satellite communications are affected by moisture and various forms of precipitation (such as rain or snow) in the signal path between end users or ground stations and the satellite being utilized. This interference with the signal is known as rain fade. The effects are less pronounced on the lower frequency 'L' and 'C' bands but can become ...
This spectrum is a limited resource for every country. To ensure optimum utilization of the orbit spectrum, the national administrations of countries worldwide undertake regular monitoring exercises. This orbit spectrum is used by service providers to implement satellite broadcasting, communication satellite, and weather satellite services. To ...
In 1945, he proposed a satellite communication system using geostationary orbits. [8] He was the chairman of the British Interplanetary Society from 1946 to 1947 and again in 1951–1953. [ 9 ]
First satellite to transmit television images from space (weather) April 1, 1960 United States: Echo 1: First passive reflector communications satellite: August 12, 1960 United States: Courier 1B: First active repeater communications satellite First communications satellite powered by solar cells to recharge storage batteries: October 4, 1960 ...
Amateur-satellite service (also: amateur-satellite radiocommunication service) is – according to Article 1.57 of the International Telecommunication Union's (ITU) Radio Regulations (RR) [12] – defined as «A radiocommunication service using space stations on earth satellites for the same purposes as those of the amateur service.»
The U.S. Navy's Communications Satellite Program Office (PMW 146) of the Program Executive Office (PEO) for Space Systems in San Diego, is lead developer for the MUOS program. [4] Lockheed Martin Space is the prime system contractor and satellite designer for MUOS under U.S. Navy Contract N00039-04-C-2009, which was announced on 24 September 2004.