GLONASS is a radio-based satellite navigation system operated for the Russian government by the Russian Space Forces. It both complements and provides an alternative to the United States' Global Positioning…

The Global Positioning System (GPS) is a space-based satellite navigation system that provideslocation and time information in all weather, anywhere on or near the Earth, where there is an unobstructed…

Astrium is an aerospace subsidiary of the European Aeronautic Defence and Space Company (EADS). It provides civil and defence space systems and services. In…

Synthetic-aperture radar (SAR) is a form of radar whose defining characteristic is its use of relative motion between an antenna and its target region to provide distinctive long-term coherent-signal variations…

(ex Marconi Space and Defence Systems) Marconi Electronic Systems (MES), or GEC-Marconi as it was until 1998, was the defence…

MetOp is a series of three polar orbiting meteorological satellites operated by EUMETSAT, the European Organisation for the Exploitation of Meteorological Satellites. The satellites form the space segment component of…

The Galileo spacecraft was an unmanned spacecraft sent by NASA to study the planet Jupiter and its moons. Named after the astronomer and Renaissance pioneer Galileo Galilei, it was launched…

Galileo is a joint initiative of the European Commission (EC) and the European Space Agency (ESA). Galileo will be Europe’s own global navigation satellite system, providing a highly accurate, guaranteed…

Stratolaunch Systems is a space transportation venture specializing in air launch to orbit, with its corporate headquarters located in Huntsville,…

Sea Launch is a spacecraft launch service that uses a mobile sea platform for equatorial launches of commercial payloads on specialized Zenit 3SL rockets. It has assembled and launched thirty-one…