synchronous satellite communications system
81Commercialization of space — A DIRECTV satellite dish on a roof Commercialization of space is the use of equipment sent into or through outer space to provide goods or services of commercial value, either by a corporation or state. Examples of the commercial use of space… …
82Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
83Molniya orbit — For other uses, see Molniya (disambiguation). Figure 1: The Molniya orbit. Usually the period from perigee + 2 hours to perigee + 10 hours is used to transmit to the northern hemisphere Molniya orbit is a type of highly elliptical orbit with an… …
84Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
85Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… …
86SK Telecom — Infobox Korean company company name = SK Telecom company company type = Public company kse|017670 nyse|SKM foundation = March 1984 parent = SK Group location = flagicon|South Korea Jung gu, Seoul, South Korea key people = Shin Bae Kim (CEO)… …
87Mars Observer — Artist rendering of Mars Observer in orbit around Mars. Operator NASA / JPL …
88Virgin Media — Inc. Type Public Traded as NASDAQ: VMED, LSE:  …
89Telecommunications industry in China — This article discusses the telecommunications industry in mainland China. For Hong Kong and Macau, see Communications in Hong Kong and Communications in Macau. For Taiwan (Republic of China), see Communications in the Republic of China. The… …
90TV and FM DX — TV DX and FM DX is the active search for distant radio or television stations received during unusual atmospheric conditions. The term DX is an old telegraphic term meaning long distance. VHF/UHF television and radio signals are normally limited… …
