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Modernization and GPS III

Modernization and GPS III. Southern California Section ION Meeting 11 March 2009. Lt Col David Goldstein, US Air Force Chief Engineer GPS Wing. This briefing is for information only. . Overview. GPS SS Current Status

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Modernization and GPS III

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  1. Modernization and GPS III Southern California Section ION Meeting 11 March 2009 Lt Col David Goldstein, US Air Force Chief Engineer GPS Wing This briefing is for information only. 

  2. Overview • GPS SS Current Status • Overview of Current Space Segment Status • Modernization Improvements • IIR-M, IIF, IIIA • GPS III • Discussion will focus on GPS III • Summary

  3. GPS – Serving the World • Constellation– the largest ever - 31 Healthy Satellites • 13 Block IIA • 12 Block IIR • 6 Block IIR-M • 31st satellite, SVN 23, set healthy, achieved 31 healthy satellite constellation for first time ever • Most Recent Launch • IIR-19(M) – 6th modernized SV • Launched Wednesday, 15 Mar 08 • SVN 48, PRN 7 • Set healthy on 24 Mar 08 • Next Launches • IIR-20(M) – Mar 09 – L5 demo payload • IIR-21(M) – Aug 09 • IIF-1 – Oct 09

  4. SPS Signal in Space Performance System accuracy exceeds published standard

  5. GPS Modernization Program Increasing System Capabilities w Increasing Defense / Civil Benefit Block IIA/IIR Block IIR-M, IIF Block III • Basic GPS • Standard Service • Single frequency (L1) • Coarse acquisition (C/A) code navigation • Precise Service • Y-Code (L1Y & L2Y) • Y-Code navigation • IIR-M: IIA/IIR capabilities plus • 2nd civil signal (L2C) • M-Code (L1M & L2M) • IIF: IIR-M capability plus • 3rd civil signal (L5) • 2 Rb + 1 Cs clocks • 12 year design life • Backward compatibility • 4th civil signal (L1C) • Increased accuracy • Increased anti-jam power • Increased availability • Increased integrity

  6. Second Civil Signal (L2C) Designed to meet commercial needs Higher accuracy via ionospheric correction Expected to generate over $5 billion in user productivity benefits Available since 2005 On 24 satellites by 2016 Benefits existing professional receivers Supports miniaturization, possible indoor use Increases accuracyfor consumers

  7. Third Civil Signal (L5) Designed to meet demanding requirements for transport safety Uses highly protected Aeronautical Radionavigation Service (ARNS) band May also enable global, decimeter-level accuracy using new techniques Opportunity for international interoperability Demonstration signal to be launched in 2009 24 satellites by 2018

  8. Fourth Civil Signal (L1C) Designed with international partners for interoperability Modernized civil signal at L1 frequency More robust navigation across a broad range of user applications Improved performance in challenged tracking environments Original L1 C/A signal retained for backward compatibility Launches with GPS III A in 2014 On 24 satellites by ~2021 Under trees Inside cities

  9. New Civil Signals Summary Second civil signal “L2C” Designed to meet commercial needs Higher accuracy through ionospheric correction 1st launch: Sep 2005 (GPS IIR-M); 24 satellites: ~2016 Third civil signal “L5” Designed to meet demanding requirements for transportation safety-of-life 1st launch: ~ 2009 (GPS IIF); 24 satellites: ~2018 Fourth civil signal “L1C” Designed with international partners for GNSS interoperability Begins with GPS Block III 1st launch: ~2014; 24 satellites: ~2021

  10. GPS – Spectrum L5 L1C Block IIA 1990 Block IIR 1997 P(Y) C/A Previous Since Dec 2005 (6 SVs) Block IIR-M, 2005 L2C M Planned Block IIF, 2009 Block III, 2014 L1C (artist’s concept) L5 L1 L2 RNSS BandRNSS BandRNSS Band

  11. GPS III Update • Contract for GPS III-A satellites awarded, May 2008 • Lockheed making excellent progress toward PDR, 19/71 milestones • Selective Availability feature to be eliminated • Next-Generation Operational Control Segment (OCX) • Needed for Block III satellites & full functionality of modernized signals • Will implement full functionality of L2C and L5 • Awarded Phase A contracts to Northrop Grumman and Raytheon, Nov 2007 • Future increments of GPS III will incorporate additional capabilities • As technology matures and new requirements are validated

  12. GPS III- Spiral Development • GPS III developed as a low risk capability insertion program • GPS III A • Provides initial capability for GPS III, new signals, added power • GPS III B • Directional crosslinks demonstration • Enhanced ranging • Enhanced integrity • GPS III C • Spot Beam demonstration • Enhanced anti-jam capability

  13. Summary Largest constellation in history with best accuracy ever GPS III A design phase successfully moving forward GPS III will provide modernized design and technology insertion New signal design Increased availability Increased integrity Increased accuracy GPS – Serving the World

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