1 / 14

GPS Modernization

GPS Modernization. 14 March 2005 CGSIC IISC Europe. Civil SatNav Applications. Enabling technology Unlimited growth potential $68 billion industry worldwide by year 2010 Wide use in transportation safety Aviation, maritime, railroad, highway, etc.

jael
Download Presentation

GPS Modernization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. GPS Modernization 14 March 2005 CGSIC IISC Europe

  2. Civil SatNav Applications • Enabling technology • Unlimited growth potential • $68 billion industry worldwide by year 2010 • Wide use in transportation safety • Aviation, maritime, railroad, highway, etc. • Potential to reduce land-based navigation systems • Centerpiece of future transportation infrastructure • Ever increasing range of civil uses • Telecommunications, surveying, law enforcement, emergency response, agriculture, mining, etc. • Used in conjunction with remote sensing • Supporting civil applications never envisioned

  3. GPS modernization balances military and civil needs GPS Modernization Plan Block IIA/IIR Block IIR-M, IIF Block III III: IIF capabilities & • Improved civil signal (L1C) • Increased accuracy (4.8-1.2m) • Evaluating integrity improvements • Navigation surety • Increased A/J power (+20 dB) IIR-M: IIA/IIR capabilities & • 2nd civil signal (L2C) • New military code • Flex A/J power (+7dB) IIF: IIR-M capability plus • 3rd civil signal (L5) IIA / IIR: Basic GPS • C/A civil signal (L1C/A) • Std Service, 16-24m SEP • Precise Service, 16m SEP • L1 & L2 P(Y) nav

  4. Civil Benefits of GPS Modernization • New signals provide • Reduced vulnerability to interference • Calculation of ionospheric corrections at user site • Improvements in service performance in accuracy, availability, integrity, and reliability • Provide centimeter-level accuracy for scientific and survey applications • New spectrally separated signals • Preserve civil use outside areas of military ops • New commercial opportunities • Opportunity to converge services with other global satellite navigation systems

  5. L2C code Second Civil Signal (L2C) Begins with IIR-M sats First launch: May 2005 24 Satellites: 2012 • Benefits of L2C • Improves service for ~ 50,000 current scientific/ commercial dual-frequency users • Extends service for safety-of-life, single-frequency E-911 applications • Provides 24 dB better protection than C/A against code cross correlation and continuous wave (CW) interference • Signal defined in ICD-GPS-200C

  6. Third Civil Signal (L5) L5 code Begins with IIF sats First launch: 2007 24 Satellites: 2014 • Benefits of L5 • Improves signal structure for enhanced performance • Higher power (-154.9 dBW) • Wider bandwidth (24 MHz) • Aeronautical Radionavigation Services band • Co-primary allocation at WRC-2000 (1164-1215MHz) • Signal defined in IS-GPS-705

  7. L1C Signal L1C Begins with GPS III sats First launch: 2012 24 Satellites: 2017 • Benefits of L1C • Adds a modernized L1 civil signal • In addition to C/A code to ensure backward compatibility • Higher precision • Added interference protection • Enables civil interoperability with Galileo • Converges with Galileo L1 Open Service

  8. GPS III Status • Contracts awarded in January 2004 • To Lockheed and Boeing for 12-month requirements definition effort • Leading to Systems Requirements Review • Selection of final contractor anticipated in 2005 • First launch projected for 2012

  9. GPS III Civil Benefits • Significant increase in system accuracy • Improve robustness to interference • Improve level of unaugmented integrity • Improve availability of accuracy with integrity • Backward compatibility with existing receivers • Operational capability for L2C and L5 • In combination with GPS IIR-M and IIF satellites • Flexibility to respond to evolving requirements with limited programmatic impacts • Opportunity to converge with Galileo Open Service

  10. Legacy Improvement • Legacy Accuracy Improvement Initiative by Air Force and National Geospatial-Intelligence Agency in 2005 • Additional info decreases “Age of Data”, thus increasing accuracy in GPS satellite orbital position and clock data • Integrity Failure Modes and Effects Analysis • Knowledge of GPS failure modes required to design improved integrity monitoring systems • Continuing improvements to WAAS and NDGPS

  11. Current GPS Monitoring Stations

  12. GPS Monitoring Stations Accuracy Improvement Initiative (AII)

  13. Modernization Information • JPO GPS Modernization • http://gps.losangeles.af.mil/engineering/icwg/ • Navigation Information Service • http://www.navcen.uscg.gov • http://www.navcenter.org/ (mirror site) • E-mail: nisws@navcen.uscg.mil • Phone: +1 703 313 5900 • Fax: +1 703 313 5920

More Related