I n t e g r i t y - S e r v i c e - E x c e l l e n c e Headquarters U.S. Air Force GPSW Brief to PNT Advisory Board 29 Mar 07 v5 GPS Status & Modernization Briefing to National PNT Advisory Board 29 March 2007 Col Allan Ballenger Commander, GPS Wing

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 2 GPS System Description GPS Constellation Status & Availability Recent GPS Accomplishments GPS Modernization Summary Overview Department of Defense and Air Force are committed to responsible stewardship of GPS as a global utility

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 3 GPS System Description Mission

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 4 Department of Transportation Federal Aviation Administration (FAA) Department of Defense Services (Army, Navy, AF, Marines) Agencies (NGA, DISA, etc.) Civil Applications Search and rescue Surveying and mapping Trucking, shipping and Aviation Banking and Finance Offshore drilling Fishing and boating International Cooperation Japan – QZSS Russia - GLONASS Europe and other countries GPS System Description GPS Enterprise Department of Homeland Security Coast Guard

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 5 GPS System Description What Are the GPS Segments?

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 6 16 Block IIA satellites operational 12 Block IIR satellites operational 3 Block IIR-M satellites operational 5 additional IIR-M satellites to launch Since Dec 93, U.S. Government met/exceeded civil GPS service performance commitments SPS Performance Standard (PS) U.S. DoD committed to superior GPS service 30 Healthy Satellites Baseline Constellation: 24 GPS Constellation Status & Availability as of March 2007 as of 26 Mar 07

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 7 GPS Constellation Status & Availability Growing to 30+ Satellites IIR-15(M) launched: Monday, 25 Sep 06 Set healthy: Thursday, 12 Oct 06, SVN 52 - PRN days from launch to on-orbit ops IIR-16(M) launched: Friday, 17 Nov 06 Set healthy: 13 Dec 06, SVN 58 - PRN 12 PRNs 12 & 32 return to ops – allows growth to 32 SV constellation Larger constellation for improved availability & accuracy PRN – Pseudo Random Noise (spreading code) SVN – Space Vehicle Number

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 8 Launched a new era of GPS services First GPS IIR-M (14) launched 25 Sep 05, operational 16 Dec 05 New military signal (M-Code) and new civil signal (L2C) GPS IIR-M (15) launched 25 Sep 06; IIR-16(M) launched 17 Nov 06 Fielded operational improvements Legacy Accuracy Improvement Initiative – improves position accuracy over 10% Provide “zero age of data” to warfighters Delivered 100,000+ DAGRs, 250,000+ SAASMs OSD/NII signed Precise Positioning Service Performance Standard, 23 Feb 07 – enables certification of military GPS use in US airspace New acquisition strategies for next generation GPS “Back to Basics” and incremental block approach GPS Block III satellites GPS Block III Next-Generation Control Segment (OCX) Modernized User Equipment/Modernized Space Receiver Recent GPS Accomplishments

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 9 GPS IIR-13 6 Nov 04 GPS IIR-15(M) 25 Sep 06 GPS IIR-14(M) 25 Sep 05 1st Modernized GPS Satellite GPS IIR-16(M) 17 Nov 06 A world class team providing worldwide position, navigation & timing! Recent GPS Accomplishments Our Mission Successes

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 10 Key Measures of Effectiveness help evaluate GPS services Accuracy Bounded inaccuracy Assured Availability Integrity Resistance to RF Interference/Jamming Accuracy Current Requirement Current Objective Recent GPS Accomplishments Continuous Performance Improvement

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 11 PLGR (Legacy)DAGR Single (L1 only)FrequencyDual (L1/L2) PPS-SMSecuritySAASM Text onlyDisplayGUI w/maps 5 MaximumSatellitesAll-In-View 24 dBAnti-Jam41 dB (+) 6 minutesTTFF1 minute 60 secTTSF20 sec 2.75 lbsWeight.94 lb NTE 120 cu. In.Volume Fit in secured 2-clip Ammo Pouch 13 hrs (8 batteries) Battery Life 14 hrs (4 batteries,-20C) 2000 hrReliability5000 hr Recent GPS Accomplishments Leveraging Civil/Commercial Technology

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 12 GPS III (Block III) Increased accuracy Increased A/J power (up to 20 dB) Signal integrity Search and Rescue Common signals with Galileo (L1C) Legacy (Block IIA/IIR) Basic GPS C/A civil signal (L1C/A) Std Pos. Service Precise Pos. Service L1 & L2 P(Y) nav NDS Modernized (Block IIR-M) 2nd civil signal (L2C) M-Code signals (L1M, L2M) Flex A/J power (+7dB) Space Segment Modernized (Block IIF) 3rd civil signal (L5) Upgraded (AEP) IIR-M IIF TT&C WAGE, AII, LADO SAASM New MCS/AMCS Modernized (OCX V1) New Architecture Signal Monitoring Legacy TT&C L1 & L2 monitoring Control Segment User Segment Legacy Man Pack MAGR, PLGR RCVR-3A, 3S OH, UH FRPA, CRPA Upgraded DAGR CSEL GAS-1 MAGR2K GB-GRAM Modernized MUE MSR GPS III (OCX V2) GPS III TT&C NAVWAR, GNOC L1C, L2C, L5 Flex Power Real-Time C2 GPS Modernization Capability Evolution

I n t e g r i t y - S e r v i c e - E x c e l l e n c e GPSW Brief to PNT Advisory Board 29 Mar 07 v5 Slide 13 Sustaining capabilities for military and civil users worldwide Maintain ground systems/on-orbit satellites, launch new satellites Fielding GPS enhancements, such as Legacy Accuracy Improvement Modernizing constellation with new signals and capabilities First IIR-M launch Sep 05, first IIF launch 2008, first III launch 2013 New civil and military GPS signals Transitioning control segment from legacy to new architecture/system by Summer ‘07 Continuing work with Galileo and international community Developing next generation of GPS Acquisition strategies for space, ground, and user segments Synchronizing space, control, and user equipment upgrades “Back to Basics” focus and incremental block approach Managing GPS systems & supporting stakeholders Technical baselines, interfaces, performance Supporting/participating in key fora – NPEC/NPCO, DSB, IRT, PNT FACA Department of Defense and Air Force are committed to responsible stewardship of GPS as a global utility Summary