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galileo satellite

Galileo is Europe’s own global navigation satellite system, providing a highly accurate, guaranteed global positioning service under civilian control.

Each satellite will take about 14 hours to orbit the Earth. In that same month, The first two Galileo In-Orbit Validation satellites were launched by Twenty-two further satellites with Full Operational Capability (FOC) were on order as of 1 January 2018In January 2017, news agencies reported that six of the From 11 July till 18 July 2019, the whole constellation experienced an "unexplained" signal outageIn September 2003, China joined the Galileo project. The antennas, shown on the underside of the body in the picture, always point towards the Earth. Should the maser clock fail, however, the operating rubidium clock will take over instantaneously and the two reserve clocks will start up.

Through With 26 satellites now in orbit and over 1.5 billion smartphones and devices worldwide receiving highly accurate navigation signals, Europe’s Following the European Commission’s decision to accelerate development of Galileo Next Generation, ESA has asked European satellite manufacturers to submit bids for the The Galileo High Accuracy Service (HAS) will provide Precise Point Positioning (PPP) corrections enabling position accuracies in the 20-cm range. The services currently offered are Open Service, Public Regulated Service and Search and Rescue Service.Satellites GSAT-215 (Nicole), GSAT-216 (Zofia), GSAT-217 (Alexandre), GSAT-218 (Irina) were successfully launched from Kourou, French Guiana, on 12 December 2017 on an Ariane 5 ES.Satellites GSAT-219 (Tara), GSAT-220 (Samuel), GSAT-221 (Anna), GSAT-222 (Ellen) were successfully launched from Kourou, French Guiana, on 25 July 2018 on an Ariane 5 ES.As of 2014, ESA and its industry partners have begun studies on Galileo Second Generation satellites, which will be presented to the EC for the late 2020s launch period.In July 2006, an international consortium of universities and research institutions embarked on a study of potential scientific applications of the Galileo constellation. At any time, only one of each type is operating. One satellite in each plane will be a spare, on stand-by should any operational satellite fail.From most locations, six to eight satellites will always be visible, allowing positions and timing to be determined very accurately to within a few centimetres.

Galileo is a EU programme, carried out in cooperation with the European Space Agency.As well as providing global navigation services, Europe’s Galileo satellite constellation is contributing to saving more than 2000 lives annually by relaying SOS messages to first responders. The spacecraft has four clocks, two of each type. Navipedia, . [2] [3] While providing autonomous navigation and positioning services, Galileo is interoperable with other GNSS systems such as GPS and GLONASS . Galileo is Europe's Global Navigation Satellite System, a rival to the US GPS system that will be used for defence and critical national infrastructure purposes. European Union member states decided it was important to have a satellite-based positioning and timing infrastructure that the US could not easily turn off in times of political conflict.The European Union and the European Space Agency agreed in March 2002 to fund the project, pending a review in 2003 (which was completed on 26 May 2003). Galileo performed close observations of a second asteroid, 243 Ida, at 16:51:59 UTC on August 28, 1993, at a range of 2,410 km (1,500 mi). It carries two environmental monitors that have been in operation almost continuously since launch, gathering vital data about the Galileo intermediate circular orbit environment and helping in the design of the full constellation.GIOVE-A was designed and sized for a 27 month mission. The complete Galileo constellation will comprise satellites spread evenly around three orbital planes inclined at an angle of 56 degrees to the equator.

Interoperability with the Once the In-Orbit Validation (IOV) phase was completed, the remaining satellites are being placed in orbit at regular intervals to reach Full Operational Capability (Subsequent FOC satellites were launched as follows:The Galileo FOC satellites provide the same capabilities as the previous IOV satellites, but with improved performance, such as higher transmit power.With 22 Galileo satellites in Orbit (4 IOV plus 18 FOC satellites), the constellation is on track to reach completion in 2020.The GIOVEs were aimed at testing Galileo positioning system technologies in orbit.GIOVE-A, was launched in December 2005, its primary goal being to claim the frequencies allocated to Galileo by the International Telecommunications Union (GIOVE-A was the first European satellite to be launched into medium Earth orbit (MEO).

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