GPS Status and Modernization Maj Wesley Chidester Deputy Chief, Systems Engineering & Integration GPS Wing, Air Force Space Command GEOSpatial Information.

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Presentation transcript:

GPS Status and Modernization Maj Wesley Chidester Deputy Chief, Systems Engineering & Integration GPS Wing, Air Force Space Command GEOSpatial Information Systems for Transportation Symposium Charleston, WV April 2010 "This briefing is for information only. No US Government commitment to sell, loan, lease, co-develop or co-produce defense articles or provide defense services is implied or intended." "DISTRIBUTION A: Approved for public release; distribution unlimited"

2 Overview GPS Overview Recent Events Modernization Improvements

3 Critical Asset Available, reliable, accurate, and free of charge Vital to International Security, Economic Growth, and Public Safety Creates an irreplaceable advantage for warfighters and civil communities Extends across all domains -- air, land, sea, space, cyberspace Effects transcend national and military boundaries Simultaneously creates strategic and tactical, global and local effects

4 Very robust constellation 30 space vehicles currently in operation 11 GPS IIA 12 GPS IIR 7 GPS IIR-M 4 additional satellites in residual status 1 additional IIR-M waiting to be set healthy Global GPS civil service performance commitment met continuously since December 1993 Next Launch – IIF-1, May 2010 GPS – Serving the World

5 GPS Ground Segment Operated by Space Professionals in 2d Space Operations Squadron at Schriever AFB, CO Backup facility at Vandenberg AFB, CA Global network of 16 ground monitoring sites and 12 ground antennas Hawaii Cape Canaveral Ascension Diego Garcia Kwajalein Schriever AFB Vandenberg AFB USNO Wash, DC England Bahrain Ecuador Argentina South Africa Tahiti Alaska Australia New Zealand South Korea

6 System accuracy exceeds published standard SPS Signal in Space Performance (Root Mean Square (RMS) over all SPS SIS URE) 2001 SPS Performance Standard (RMS over all SPS SIS URE) 2008 SPS Performance Standard Selective Availability RMS Signal-in-Space User Range Error (URE), meters N/A

7 GPS Modernization Programs GPS II R / IIR-M 2005 IIA/IIR capabilities plus 2nd civil signal (L2C) M-Code (L1M & L2M) GPS IIA 1995 Standard Service Single frequency (L1) Coarse acquisition code navigation Precise Service Y-Code (L1Y & L2Y) GPS IIF 2010 IIR-M capability plus 3rd civil signal (L5) 12 year design life GPS III Backward compatible 4th civil signal (L1C) Increased availability Increased integrity Ground Control Segment Architecture Evolution Plan (AEP) Next Generation Control Segment (OCX) Legacy Control System Space Segment

8 Architecture Evolution Plan (AEP) Transitioned in 2007 Modern distributed system replaced 1970’s mainframes Increased capacity for monitoring of GPS signals to 100% worldwide coverage (was 96.4%) and have 99.8% of world double covered Increased worldwide commanding capability from 92.7% to 94.5% while providing nearly double the backup capability Next Generation Operational Control Segment (OCX) Enables modernized messaging Controls more capable GPS constellation Monitors all GPS signals $1.53B contract awarded 25 February 2010 GPS Modernization – Ground

9 Second civil signal “L2C” Designed to meet commercial needs Higher accuracy through ionospheric correction 1 st launch: Sep 2005 (GPS IIR-M); 24 satellites: ~2016 Third civil signal “L5” Designed to meet demanding requirements for transportation safety-of-life 1 st launch: ~ 2010 (GPS IIF); 24 satellites: ~2018 Fourth civil signal “L1C” Designed with international partners for GNSS interoperability Begins with GPS Block III 1 st launch: ~2014; 24 satellites: ~2021 GPS Modernization – New Civil Signals

10 Optimize GPS assets to improve operational effectiveness for global users & terrain challenged environments Increase the number of vehicles over head for better availability/coverage Constellation expansion feasible with robust number of satellites now on-orbit Consistent with the current Standard Positioning Service (SPS) Performance Standard Adjust position of satellites in 3 of 6 orbital planes to create expanded constellation Expanded constellation provides better GLOBAL coverage GPS Expandable Current Operations Expanded Operations

11 Program Stability and Performance Civil service performance commitment met continuously since 1993 Continuous improvements in accuracy, availability, etc. Continuity of constellation and signals ensured through Air Force operation and acquisition Funding through U.S. taxpayers Policy Stability and Transparency Open access to civil GPS signals, free of direct user fees Open, free, and stable technical documentation Market-based competition worldwide National-level policy coordination including civil and military leaders Commercial Entrepreneurship and Investment Continuous Modernization thru Technology Investment Keys to the Global Success of GPS

12 Largest constellation in history with best accuracy ever Modernized Command and Control System allows more signal monitoring and quicker satellite commanding than ever before Constant improvements through constellation management And we’re continuing to modernize and improve GPS even more! Summary GPS -- Serving the World

GPS Status and Modernization GEOSpatial Information Systems for Transportation Symposium Charleston, WV April 2010 Maj Wesley Chidester Deputy Chief, Systems Engineering & Integration GPS Wing, Air Force Space Command "DISTRIBUTION A: Approved for public release; distribution unlimited" "This briefing is for information only. No US Government commitment to sell, loan, lease, co-develop or co-produce defense articles or provide defense services is implied or intended."