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GNSS PROGRAM UPDATES

GNSS PROGRAM UPDATES. Mark Holbrow Assisted by: Prof. Terry Moore (University of Nottingham). Global Navigation Satellite Systems Status. High Level Overview of Navigation Satellite System Status Global Navigation Satellite System GPS GLONASS Galileo Compass

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GNSS PROGRAM UPDATES

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  1. GNSS PROGRAM UPDATES Mark Holbrow Assisted by: Prof. Terry Moore (University of Nottingham)

  2. Global Navigation Satellite Systems Status • High Level Overview of Navigation Satellite System Status • Global Navigation Satellite System • GPS • GLONASS • Galileo • Compass • Regional Navigation Satellite System • QZSS (Japan) • IRNSS (India) • CAPS (China)

  3. GPS STATUS UPDATES

  4. Current GPS Status Jan 2012 • 32 satellites on-orbit • 11 Block IIA (1990) • 12 Block IIR (1997) • 7 Block IIR-M (2005) • 2 Block IIF (2010) • Scheduled up coming launch (source: Microcom Systems) • Block IIF – 9, July 2012 • Block IIF – 3, Sep 2012 • Block IIF – 4, Dec 2012

  5. GPS Satellites Location April 2011

  6. GPS User Range Error History

  7. GPS Modernisation

  8. GPS III Payload Evolution

  9. GLONASS STATUS UPDATES

  10. GLONASS Constellation Feb 2012 • 1976 Start to develop • 1996 Achieved FOC with 24 satellites • 2001 Degrade down to 7 operational satellites • 2012 Feb: • 31 in constellation, 24 operational • 1 commissioning, 1 flight test, 3 spare, 2 maintenances • Last launch 28 Nov 2011 (Glonass M) • Next launch scheduled for June 2012, one Glonass K1 N1

  11. Glonass Control Segment

  12. Glonass History and Perspective

  13. Glonass Accuracy

  14. GLONASS Availability Note: availability is calculated using a current almanac for the 24 hours period as percentage of time during which the PDOP≤6 is valid at mask angles ≥5°, where PDOP is a position (three-dimensional) dilution of precision. Step of calculation: 4 minutes in duration and 1 degree over the surface

  15. GLONASS Evolution GLONASS 1982-2008 GLONASS-M 2003 onwards GLONASS-K1 2011 onwards GLONASS-K2 2013 onwards • Design phase • 10 yrs design life • Exp Clk Sta – 5… 1*10-14 • Unpressurised • SAR • L1 L2 FDMA • L3 DMA • 3 yrs design life • Clk Sta – 5*10-13 • Total launched – 81 • Op life 4.5yrs • L1 L2 FDMA • 10 yrs design life • Exp Clk Sta – 10 … 5*10-14 • Unpressurised • SAR • L1 L2 FDMA • L3 CDMA • 7 yrs design life • Clk Sta – 1*10-13 • Total launched – 28 • 8 more to be launched by the end of 2012 • L1 L2 FDMA GLONASS-KM 2015 onwards • Research phase

  16. GALILEO STATUS UPDATES

  17. Galileo Status • Two test satellites on orbit • GIOVE-A (2005), GIOVE-B (2008) • To reserve frequencies set aside for Galileo • In-Orbit-Validation (IOV) • 4 IOV satellites • Aim at qualifying space, ground and user segments • ‘Thijs’ and ‘Natalia’ launched successfully in 21st Oct 2011, ‘Milena’ and ‘Adam’ will follow in 2012 • E1, E5 and E6 capabilities • Initial-Operational-Capability (IOC) • Planned around 2015 • 4 IOV satellites + another 14 • Full-Operational-Capability (FOC) • Planned around 2020 • 30 satellites (27 operational + 3 spare)

  18. Galileo Ground Sites for IOC

  19. Galileo Services

  20. Galileo IOC and FOC Phases

  21. Galileo Signal from Space

  22. BEIDOU / COMPASS STATUS UPDATES

  23. Beidou / Compass Status • Beidou I • Originally Beidou military system • Ultimately global civil/mil capability • ICD released in Dec 2011 • 10 satellites launched: 1 MEO, 4 GEO, 5 IGSO • Beidou II / Compass I • Operational 2012 • Regional: China & nearby area, passive positioning • 5 GEO, 5 IGSO, 4 MEO • Proposed launched: 1 GEO in Feb, 2 MEO in June, 1 MEO in Aug, 1 IGSO in Dec • Beidou III / Compass II • Operational 2020 • Global, passive positioning capability • 27 MEO, 5 GEO, 3 IGSO

  24. Beidou Global Services

  25. Beidou / Compass Application • Fishery • Transportation • Water conservancy • Meteorology • Forest fire prevention • Timing • Disaster Prevention and mitigation • Soil monitoring

  26. QZSS STATUS UPDATES

  27. QZSS Status • QZSS is designed so that at least one satellite (of the three) can always be observed at high elevation angles (>60°) in Japan • Three inclined geosynchronous orbits, with same ground track • First launch Sept 11 2010 – “Michibiki” operational June 11

  28. OTHER GNSS STATUS UPDATES

  29. Other future GNSS • India • GAGAN – Experimental phase • An SBAS like WAAS, EGNOS, MSAS • IRNSS – Concept and planning phase • Autonomous system with 7 satellites • 4 IGSO and 3 GEO • China • Chinese Area Positioning System (CAPS) • China’s Regional Navigation Satellite System • Similar signal structure to GPS but at C band (4GHz) • Transponder based system, with Nav data generated on the ground. • Mixture of IGSO and GEOs (use of retired comms sats)

  30. Any Questions? Thank you for your attention and time

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