Originally ordered by Orion Network Systems as Orion 2, the contract was later terminated. It was then bought by Eutelsat as spare satellite, called RESSAT, which was later renamed Eutelsat W1 as a replacement satellite compatible with their previously-launched W2 and W3 spacecraft. Eutelsat subsequently decided to launch W1 in September 2000. Located at the 10 degrees East position, the satellite serves a full range of applications that include that include business communications, Internet-based services and television transmission. It has 28 channels, 20 of which provide coverage of Europe, North Africa, the Middle East and central Asia via a fixed widebeam, with the remaining eight connected to a steerable spotbeam, to address new markets in geographical areas outside the widebeam coverage area (notably southern Africa). Services can be simultaneously provided within both coverages.
Geostationary OrbitZY-2 (Ziyuan-2, 'Resource-2'), while reported as a civilian Earth observation system, was actually code-named JB-3 (Jianbing-3) and was China's first high-resolution military imaging satellite. They are reportedly used for area surveillance.
Polar OrbitCluster is an magnetospheric research project, consisting of a constellation of four identical satellites. Part of the first Cornerstone Mission in the European Space Agency's long-term space science programme, the Cluster II satellites were built to replace the original Cluster mission, which was aborted after Ariane-5G's maiden flight in June 1996 failed to launch the satellites. The mission's objective is to research the Earth's magnetosphere and its interaction with the solar winds, via four identical satellites flying in formation which take simultaneous measurements to provide the most detailed three-dimensional study of changes and processes taking place in near-Earth space. The four satellites were launched in 2000 on two Soyuz-U Fregat rockets.
Elliptical Orbit