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eLoran Terrestrial PRS Quality Timing Charles Curry B.Eng, FIET MD, Chronos Technology Ltd ITSF 3-5 Nov 2009 - Rome Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD www.chronos.co.uk T: +44 (0)

  1. eLoran – Terrestrial PRS Quality Timing Charles Curry B.Eng, FIET MD, Chronos Technology Ltd ITSF 3-5 Nov 2009 - Rome Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  2. Contents Introduction & Background The Loran System New UK Loran Station Test Results Report from ILA38 in Portland, Maine Latest Loran Developments The GAARDIAN Project Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 2 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  3. The Enhanced Loran (eLoran) System Internationally Standardized PNT System (Positioning Navigation and Timing) Latest evolution of the LO ng RA nge N avigation system Meets Accuracy, Availability, Integrity and Continuity requirements of � Aviation non-precision instrument approaches � Maritime harbour entrance and approach manoeuvres � Land-mobile vehicle navigation � Location-based services � Precise source of time and frequency for applications such as telecommunications Independent, Dissimilar complement to GNSS Systems � Uses a different part of the electromagnetic spectrum � Time traceable to UTC independently of GNSS � Interoperable with GNSS for positioning, navigation and timing Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 3 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  4. Other Loran Facts Loran/Chayka networks in many countries/regions � USA, Europe, Russia, Saudi Arabia, China, Japan, India, South Korea � All funded and active with different functional capabilities Interference Immunity � Not susceptible to GPS impacting interference � Unique adaptive notch filtering to mitigate LF interference 100KHz LF Transmission Frequency � Different part of spectrum to GNSS (1-2 GHz) � Better building penetration Pulsed signal transmission � Allows separation of ground/skywave � Different to DCF77 or MSF 60KHz Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 4 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  5. Red = Loran Green = Chayka Picture Courtesy GLA Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 5 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  6. Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 6 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  7. Recent Events Press Release, 30 May 2007 � “Today, the General Lighthouse Authorities of the United Kingdom and Ireland announce the award of a prestigious fifteen-year contract to VT Communications (part of VT Group plc) for the provision of a state-of- the-art enhanced Loran (eLoran) radionavigation service to improve the safety of mariners in the UK and Ireland” � 15 Year Funded Program by UK Government (Dept for Transport) Anthorn Progress � 7 July 2007 – experimental transmitter moved from Rugby � 1 October 2007 – first signals from Anthorn for test and verification � 1 December 2007 – trial signals operational � 21 January 2008 – UK eLoran Station “Enters Service” Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 7 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  8. There is growing, strong, cross-government support for eLoran eLoran Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 8 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  9. Anthorn, Cumbria Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 9 Source: VT Communications www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  10. The containerised transmitter and connection to the T-antenna Source: VT Communications Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 10 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  11. Chronos Testing Chronos Commissioned to “Type Approve” eLoran for Telecom Network Stability ITU G.811 used as Benchmark � = Standard Network Stability metric for a Telecom Primary Reference Clock (PRC) � = GPS � = Cs Will eLoran step up to the mark? Used two test setups…. Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 11 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  12. Test Set-up #1 – Lab Test Bench Universal Tel GPS Rx Counter Timer Universal Cs Ref GPS Engine Counter Timer Universal Loran Rx Counter Timer Laptop runs “TimeMonitor” with GPIB interface to UCTs Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 12 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  13. Test Set-up #2 – Web Enabled Testing SyncWatch Tel GPS Rx Probe Cs Ref SyncWatch Loran Rx Probe Viewer retrieves Probes send data using data to a central standard web Server via browser GPRS or LAN. Internet www.syncwatch.com Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 13 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  14. Test setup Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 14 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  15. TIE Data – GPS Rx (x2) v Loran Rx – Test Setup #1 3 - Loran 30 nsec/div Lab Cs Offset � 1.3 x 10 -12 2 - Telecom 1 - Low Cost Quality GPS Rx GPS Engine Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 15 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  16. Test results - MTIE 1 - Low Cost GPS Engine 3 - Loran 2 - Telecom Quality GPS Rx Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 16 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  17. Long Term Testing using Test Setup #2 Steady State Data. Catch Transients for later Data can be viewed study, refine on firmware www.syncwatch.com. Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 17 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  18. ILA38 Portland, Maine, USA The Loran community is very much alive � 2 Days of Papers, 60 Delegates Review of Hardware Supply (excluding China and Russia) � Two major transmitter manufacturers � Megapulse � Nautel � One Global Tx System Integrator � Ursanav � One Supplier of the Tx Loran Timing Suite � Symmetricom � Two Receiver manufacturers � Reelektronika � CrossRate � R&D � Various Academic & R&D Projects Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 18 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  19. Loran & Politics Basic Stance � Obama wants to shut off Loran-C. � Administration has not taken a stance on eLoran. Current Law (signed Oct 2009) � Department of Homeland Security (DHS) Appropriations � If Commandant of the Coast Guard certifies that Loran-C is not needed for maritime navigation; and � Secretary of DHS certifies that the Loran-C infrastructure is not needed for a backup to GPS. � Then Loran-C can be shutoff on Jan. 4, 2010. Including selling all equipment and land associated with Loran-C. Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 19 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  20. Loran & Politics (continued) Ongoing Debate: Is eLoran going to be the backup to GPS? � Solid support for this in Congress. � PNT Executive Committee and PNT Advisory Board strongly recommend eLoran as the backup to GPS. Question Remains in U.S. � Will the Secretary of DHS ignore the scientific/technical recommendations and terminate Loran-C and with it eLoran? Confused? US Government Position � http://pnt.gov/policy/legislation/bills.shtml#loran Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 20 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

  21. GAARDIAN GNSS AVAILABILITY ACCURACY RELIABILITY anD GPS INTEGRITY ASSESSMENT Interference for TIMING and NAVIGATION Detection & Mitigation A Technology Strategy Board funded collaboration Charles Curry, B.Eng, FIET MD – Chronos Technology Ltd Chronos Technology Ltd , Stowfield House, Upper Stowfield, Lydbrook, Gloucestershire, GL17 9PD 02/12/2009 21 www.chronos.co.uk T: +44 (0) 1594 862200, F: +44 (0) 1594 862211

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