Sistemas de Navegacion GNSS


There are two kinds of Positioning and Navigation Systems based  in the space. GNSS: Global Navigation Satellite Systems (with a word wide coverage) RNSS : Regional Navigation Satellite Systems ( covering a specific region or country) Here have a resume of the main characteristics of the currently GNSS.
  • GLOBAL SYSTEMS
    1. System: GPS => Country:q United States Coding: CDMA Orbital height & period: 20,200 km, 12.0h Number of satellites: ≥ 24 Frequency: 1.57542 GHz (L1 signal), 1.2276 GHz (L2 signal) Status: operational
    2. System:GLONASS => Country: Russia Coding: FDMA/CDMA Orbital height & period: 19,100 km, 11.3h Number of satellites: 24 (30 when CDMA signal launches) Frequency: Around 1.602 GHz (SP), Around 1.246 GHz (SP) Status: operational with restrictions, CDMA in preparation
    3. System: GALILEO => Country: European Union Coding: CDMA Orbital height & period: 23,222 km, 14.1h Number of satellites: 2 test bed satellites in orbit 22 operational satellites budgeted Frequency: 1.164-1.215 GHz (E5a and E5b), 1.215-1.300 GHz (E6), 1.559-1.592 GHz (E2-L1-E11) Status: in preparation
    4. System: BEIDOU-2 /COMPASS => Country:China Coding: CDMA Orbital height & period: 21,150 km, 12.6h Number of satellites: 35[5] Frequency: B1: 1,561098 GHz, B1-2: 1.589742 GHz, B2: 1.207.14 GHz, B3: 1.26852 GHz Status: 5 satellites operational, additional 30 satellites planned
  • LOCAL SYSTEMS
    1. System: QZSS => Country: JAPAN Coding: CDMA Orbital height & period: HEO 24h Number of satellites: 1 test bed satellites in orbit 3 operational satellites budgeted Frequency: L1C/A , L1C , L2C and L5 Status: in preparation
http://en.wikipedia.org/wiki/Global_navigation_satellite_system1

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