WebFirst 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 ...

WebIridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded American company headquartered in McLean, Virginia.Iridium operates the Iridium satellite constellation, a system of 66 active satellites used for worldwide voice and data communication from hand-held satellite phones and other transceiver units. The nearly …

WebThe satellite communications facility is located at Belrose on Sydney's Northern Beaches. Optus' satellites are divided into 4 classes A, B, C and D. As of April 2014 it owns and operates Optus B3, Optus C1, Optus D1, Optus D2 and Optus D3. Optus A1, Optus A2, Optus A3 and Optus B1 satellites have been retired.

WebIn Europe, several mutually incompatible mobile radio services were developed. In 1966 Norway had a system called OLT which was manually controlled. Finland's ARP, launched in 1971, was also manual as was the Swedish MTD.All were replaced by the automatic NMT, (Nordic Mobile Telephone) system in the early 1980s.. In July 1971 Readycall was …

WebThe fourth-generation satellites, the GOES-R series, are being built by Lockheed Martin using the A2100 satellite bus.The GOES-R series is a four-satellite program (GOES-R, -S, -T and -U) that will extend the availability of the operational GOES satellite system through 2036. The first satellite of the series, the eponymous GOES-R, was launched on 19 …

WebThis is a list of NRO Launch (NROL) designations, i.e. satellites operated by the United States National Reconnaissance Office.Those missions are generally classified, so that their exact purposes and orbital elements are not published. However, amateur astronomers have managed to observe most of the satellites, and leaked information has led to the …

WebA half-duplex (HDX) system provides communication in both directions, but only one direction at a time, not simultaneously in both directions. Typically, once a party begins receiving a signal, it must wait for the transmission to complete, before replying. An example of a half-duplex system is a two-party system such as a walkie-talkie, wherein one must …

WebTelstar is the name of various communications satellites.The first two Telstar satellites were experimental and nearly identical. Telstar 1 launched on top of a Thor-Delta rocket on July 10, 1962. It successfully relayed through space the first television pictures, telephone calls, and telegraph images, and provided the first live transatlantic television feed.

WebLine-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver. Electromagnetic transmission includes light emissions traveling in a straight line.The rays or waves may be diffracted, refracted, reflected, or absorbed by the atmosphere and …

WebSAT-3/WASC or South Atlantic 3/West Africa Submarine Cable is a submarine communications cable linking Portugal and Spain to South Africa, with connections to several West African countries along the route. It forms part of the SAT-3/WASC/SAFE cable system, where the SAFE cable links South Africa to Asia.The SAT-3/WASC/SAFE …

WebA satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held.. Bus-derived satellites are opposed to specially produced satellites. Bus-derived satellites are usually customized to customer requirements, for example with specialized sensors or …

WebInmarsat is a British satellite telecommunications company, offering global mobile services. It provides telephone and data services to users worldwide, via portable or mobile terminals which communicate with ground stations through fourteen geostationary telecommunications satellites. Inmarsat's network provides communications services to a range of …

WebMultimedia is a form of communication that uses a combination of different content forms such as text, audio, images, animations, or video into a single interactive presentation, in contrast to traditional mass media, such as printed material or audio recordings, which features little to no interaction between users. Popular examples of multimedia include …

WebMEASAT Satellite Systems Sdn. Bhd, formerly Binariang Satellite Systems Sdn.Bhd is a Malaysian communications satellite operator, which owns and operates the MEASAT (Malaysia East Asia Satellite) and AFRICASAT spacecraft. The company provides satellite services to leading international broadcasters, Direct-To-Home (DTH) platforms and …