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Science Europe's answer to GPS begins navigation transmissions
Science Europe's answer to GPS begins navigation transmissions | Europe's answer to GPS begins navigation transmissions |
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| by Stephen Withers | |
| Monday, 07 May 2007 | |
  
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Science DiscussionsGIOVE-A will soon begin to continuously broadcast this navigation signal along with the time offset between Galileo and the US GPS. A dual-standard receiver could determine its position from signals transmitted by GIOVE-A and GPS satellites. Galileo will use a constellation of 30 satellites providing global coverage. Multiple service levels will be offered, including a free basic service equivalent to civil GPS, a commercial service with enhanced performance, and an encrypted service for law enforcement and other authorities. The service should be fully deployed in 2011 or 2012. In March, ESA awarded a contract for initial work on the GIOVE-A2 satellite to Surrey Satellite Technology. Having at least one satellite in orbit at all times will allow the project to maintain its rights to the frequencies allocated by the International Telecommunications Union. ITU regulations allow a maximum service interruption of two years. GIOVE-A2 should be ready for launch in the second half of 2008, but ESA officials said "The actual launch date of this new satellite will be decided later, taking into account the situation of GIOVE-A and GIOVE-B."{moscomment} |
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