|
GIOVE (:ˈdʒɔve), or Galileo In-Orbit Validation Element, is the name for each satellite in a series being built for the European Space Agency (ESA) to test technology in orbit for the Galileo positioning system.〔(First Galileo satellites named 'GIOVE' ), ESA press release, 9 March 2005.〕 Giove is the Italian word for "Jupiter". The name was chosen as a tribute to Galileo Galilei, who discovered the first four natural satellites of Jupiter, and later discovered that they could be used as a universal clock to obtain the longitude of a point on the Earth's surface. The GIOVE satellites are exploited by the GIOVE Mission〔(GIOVE mission core infrastructure ), ESA press release, 26 February 2007.〕〔(One year of Galileo signals; new website opens ), ESA press release, 12 January 2007.〕 (GIOVE-M) segment in the frame of the risk mitigation for the In Orbit Validation (IOV) of the Galileo positioning system. ==Purpose== These validation satellites were previously known as the ''Galileo System Testbed (GSTB) version 2 (GSTB-V2)''. In 2004 the ''Galileo System Test Bed Version 1 (GSTB-V1)'' project validated the on-ground algorithms for Orbit Determination and Time Synchronization (OD&TS). This project, led by ESA and European Satellite Navigation Industries, has provided industry with fundamental knowledge to develop the mission segment of the Galileo positioning system.〔(Galileo System Test Bed Version 1 experimentation is now complete ), ESA News release, 7 January 2005〕 GIOVE satellites are transmitting multifrequency ranging signals equivalent to the signals of future Galileo: L1BC, L1A, E6BC, E6A, E5a, E5b. The main purpose of the GIOVE mission is to test and validate the reception and performance of novel code modulations designed for Galileo including new signals based on the use of the BOC (Binary Offset Carrier) technique, in particular the high-performance E5AltBOC signal. It should be stressed that the role of GIOVE is purely to test transmission and reception of the new signals: these satellites can not be used for navigation even for testing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「GIOVE」の詳細全文を読む スポンサード リンク
|