In this section, you may select from many GPS references. If you experience any broken links please report them to our Navigation Information Service.

GPS Policy

• Presidential National Space Policy (June 2010)
• Presidential Policy on GPS (2004)
• Presidential Policy on GPS (1996)
• Presidential Policy on Selective Availability (2000)

GPS General References

• Acronyms and Abbreviations used in the GPS community
• Operational Advisory Message(GPS Status message) Tutorial Page
• Joint Statement of the International Committee on Global Navigation Satellite Systems (ICG), 14 - 18 September 2009 (PDF)
• GPS SPS Performance Standard 4th Edition September 2008 (PDF)
• Memorandum for GPS Users and GPS Equipment Manufacturers from U.S. Air Force dtd 29 Sep 2006 (PDF)
• DOT Report Assessing Vulnerability Of Transportation Infrastructure Relying on GPS
  • Volpe Slides - 5 October 2001 Public Outreach Meeting (ppt)
  • OST Slides - 5 October 2001 Public Outreach Meeting (ppt)
• Approved Lexicon of signal Abbreviations
• NANU Abbreviations and Information
• FAA GPS Risk Assessment Study: Risks To GPS Signal Can Be Managed, Independent Assessment Concludes
• GPS Constellation Status
• General Information Archives
• Report on L1C Modernization
  Short version
  Long version

GPS Technical References

IS-GPS-200 Navstar GPS Space Segment/Navigation User Interfaces

• Interface Specification (IS-GPS-200G, 05 Sep 2012)
• Interface Specification (IS-GPS-200F, 21 Sep 2011)
• Interface Specification (IS-GPS-200E, 08 June 2010)
• Interface Specification (IS-GPS-200D, 07 December 2004)
• Interface Control Document (ICD-GPS-200C, 10 October 1993, with IRN 200C 001-004)

IS-GPS-800 Navstar GPS Space Segment/User Segment L1C Interface

• Interface Specification (IS-GPS-800C, 05 Sep 2012)
• Interface Specification (IS-GPS-800B, 21 Sep 2011)
• Interface Specification (IS-GPS-800A, 08 June 2010)
• Interface Specification (IS-GPS-800, 04 Sep 2008)

IS-GPS-705 Navstar GPS Space Segment/User Segment L5 Interface

• Interface Specification (IS-GPS-705C, 05 Sep 2012)
• Interface Specification (IS-GPS-705B, 21 Sep 2011)
• Interface Specification (IS-GPS-705A, 08 June 2010)
• Interface Specification (IS-GPS-705, 24 Nov 2003, includes IRN 705 001-003)

Navstar GPS Control Segment to User Support Community Interfaces

• Interface Control Document (ICD-GPS-240A, 12 Jan 2010)
• Interface Control Document (ICD-GPS-870A, 15 Jun 2011)

ICD-GPS-060 GPS User Equipment (Phase III) Interface Control Document for the Precise Time and Interval (PTTI)

• Interface Control Document (ICD-GPS-060B, 12 Feb 2002)
• Interface Control Document (ICD-GPS-060A, 02 Jun 1986)

GPS User Equipment Introduction

• GPS User Equipment Introduction, September 1996

General GPS References

• Air Force Space Command Capstone Requirements Document
• GPS Augmentation Study
• GPS User Equipment Introduction - September 1996
• GPS ORD - Appendix F
• GPS FOC Statement of 1995
• RINEX - Receiver Independant Exchange Format - Status & Future
• GPS: Charting the Future

GPS Basics

• National Air and Space Museum
• University of Colorado
• U.S. Naval Observatory

Miscellaneous Links

• GPS.gov - Information on GPS, its applications, support, policy and management, and technical information
• NAVSTAR GPS Homepage - information on GPS modernization and GPS III
• National Space-Based Positioning, Navigation, and Timing (PNT) Executive Committee - policy information for GPS
• International GPS Service (IGS) - provides GPS orbits and tracking data
• NGS - National Geodetic Survey - CORS data and information on the GPS Interagency Advisory Council (GIAC)
• US Naval Observatory Timing Ops - GPS timing data
• NASA's list of GPS Applications - an online information source on the diverse uses of GPS technology all over the world.
• FAA GPS Product Team - The latest on WAAS and GPS for aviation use.
• WGS-84

Space and Weather sites

• Solar and Geophysical Activity - Warnings and alerts for current space weather.
• NOAA Space Weather - GPS - A brief description of the effects of space weather on GPS.
• 14th Air Force Space Leonid - information regarding the Leonid meteor shower that occurs every November.
• National Data Buoy Center - stations weather buoys throughout the world