Overview Background Current constellation status Constellation performance GPS modernization Summary

GPS as an Enabler GPS as an Enabler Aviation Direct Routing Financial Transactions Rail Capacity and Safety Hazmat Tracking Harbor Approaches E911 Technology Agricultural Productivity Homeland Security Emergency Response Communication Capacity Timing Standard Space Operations “GPS is rapidly becoming an integral component of the emerging Global Information Infrastructure, with applications ranging from mapping and surveying to international air traffic management and global change research.” – Presidential Decision Directive (NSTC)-6, March 1996 GPS is Critical to U.S. Economic, Transportation and Safety Programs Comm. & Timing E911 Maritime Commerce Navigation and Tracking Aviation Railroads Power Grids Space Search &Rescue

YELLOWLAND ORANGELAND UAVs GPS as an Enabler Targets hit – one weapon-one target Distributed network time synch Maintain ISR “on-station” orbits Hot handoff between weapon and munitions Refueling ops to maintain 24/7 Pre-positioned strike packages Target positions identified/geo-rectified Fused multiple sensor-data Synchronized target data hand-off Space and air sensors tasked to search GPS grids Orbiting shooters directed toward targets, initial target position data provided en-route Shooter mission profile, SMBs updated with final target coordinates GPS is Also Critical to US and Coalition Military Operations ABCCC AWACS ISR Platforms AOC Forward

GPS Policy Presidential Decision Directive, 1996 Recognized dual use nature of GPS –Enhances effectiveness of US and allied forces –Rapidly expanding civil, commercial market Interagency responsibilities for Department of Defense, Transportation and State Provided guidelines to operate and manage GPS –Encourage acceptance of GPS into peaceful civil, commercial and scientific applications –Promote safety and efficiency in transportation –Encourage private investment in/use of GPS –Strengthen and maintain national security –Promote international cooperation in using GPS for peaceful purposes

Constellation Status 28 satellites on-orbit –20 Block II/IIA satellites –8 Block IIR satellites GPS IIR-9 launched 31 Mar 03 Next launch is scheduled, GPS IIR-10, Jul 03 Three additional launches planned for FY2004 –GPS IIR-11, GPS IIR-12, GPS IIR-M1

Constellation Performance Exceeding requirements! All Errors Based on Dual Frequency, Signal in Space Only. Information Presented Reflects Data Collected During the Period from January 1, 2003 to February 4,2003. Thresholds Provided Reflect Average Location Requirements from SPS Signal Specification Dated October, PDOP Availability: Requirement - PDOP of 6 or Less, 98% of the Time or Better Actual % Horizontal Service Availability Requirement - 95% Threshold of 36 meters, 99% of the Time or Better Actual – 3.25 meters Vertical Service Availability Requirement - 95% Threshold of 77 meters, 99% of the Time or Better Actual – 4.7 meters User Range Error Requirement - 6 meters or Less, Constellation Average Actual meters

Block IIA/IIR Block III Block IIR-M, IIF Evolutionary Acquisition Evolutionary Acquisition: Navigation Surety - Increased AJ power - Increased security Increased Accuracy Assured Availability Controlled Integrity System Survivability 1 st Launch FY12 IIR-M IIR-M: IIA/IIR capabilities plus 2nd Civil Signal Earth coverage Military Code 1 st Launch 4QFY04 IIF IIF: IIR-M capability plus 3rd Civil Signal on L5 1 st Launch 4QFY06 Basic GPS Std Service (16-24m SEP) Single frequency (L1) C/A code navigation Precise Service (16m SEP) Two frequencies (L1&L2) P-code navigation Flex Power upgrade adds ability to increase power on both P and M-Code signals to defeat low level enemy jamming Increasing System Capabilities  Increasing Defense/ Civil Benefit GPS Modernization At-A- Glance

GPS Modernized Signal Evolution C/A: Coarse acquisition P(Y): Precise, encrypted military signal L2: Adding C/A-type code L1 & L2: Adding new military signal (M-Code) L5: Adding civil “safety of life” signal L2L1L5 P(Y) C/A P(Y) Present Signal Modernized IIR Block III, w/Spot Beam C/A P(Y) C/A P(Y) M 1176Mhz M P-like Modernized IIF P(Y) M C/A P(Y) M P-like C/A M M 1227 Mhz 1575 Mhz

System Capability Objectives Space Segment Control Segment User Equipment FY M-Code (IIR-M / IIF) Launches Heritage Launches SAASM Capable Full M-Code Capable 1st IIR-M1st IIF Development DT&E SAASM UE Production / Platform Installs M-Code and Hi-Power Capable Development Test Production / Platform Installs 1st GPS III Code AIT System Test GPS III Launches R&D Launches 1 st Ops Launch Development DT&E M-Code UE Development Increasing % Fielding SAASM UE Available Hi-Power-M IC L5 FOC V 5.5 SAASM IOCSAASM OA M-Code/ L2C FOC 1 st MUE ready for Production / Integration 1st Platform (CSEL) L5 IC R&D M-Code/ L2C IC Hi-Power-M FOC GPS IIIA OCS LegacyV 5.2V st Prototype GPS Enterprise Perspective Schedule AIT – Assembly, Integration, & Testing CSEL – Combat Survivor Evader Locator MUE – M-code User Equipment SAASM – Selective Availability Anti-Spoofing Module

GPS IIR-M Description Modernized Signals L1 C/A, L2C, L1, L2 P(Y) L1, L2 M-Code Flex Power Design Life 10 Years 3 Rubidium Clocks 8 IIR-M Satellites 1 st launch 4QFY04 IMPROVED SECURITY & ANTI-JAM

GPS IIF Description Modernized Signals L1 C/A, L2C L1, L2 P(Y) L1, L2 M-Code L5 New Civil Signal Flex Power Design Life 12 Years 2 Rubidium and 1 Cesium Clocks IIF Satellites 1 st Launch 4QFY06 IMPROVED ACCURACY, SECURITY & ANTI-JAM

GPS III Description Second Civil Signal Maintain Space User Service Third Civil Signal 1 ON 3 menu 2 Rockwell WPT 8 POS 9 NAV CLR MARK 0 OFF NUM LOCK FIX FOM 1 N 42* 01” 46.12” W 091* 38’ 54.36” EL ft ZEROIZE The GPS III System Assure the ability to separate, both spatially and spectrally, military and civil capabilities focused area –High power in a focused area –Modernized signal architecture Re-look at entire GPS Architecture to: –Achieve long term GPS performance goals –Reduce long term total ownership costs Ensure best GPS system for the nation for the next 30 years Program plan in-work for DoD approval Assure the ability to separate, both spatially and spectrally, military and civil capabilities focused area –High power in a focused area –Modernized signal architecture Re-look at entire GPS Architecture to: –Achieve long term GPS performance goals –Reduce long term total ownership costs Ensure best GPS system for the nation for the next 30 years Program plan in-work for DoD approval

GPS Monitor Stations L-Band GPS Ground Antennas S-Band Backup Master Control Station (BUMCS) LMMDS, Gaithersburg, MD Schriever AFB, CO Crew Training Emulator Vandenberg AFB, CA Transportable Ground Antenna Test Assets Cape Canaveral, FL Master Control Station (MCS) Integrated Mission Ops Support Center Operational Support System AFSCN Command and Control Segment (CCS) ASCENSION DIEGO GARCIA HAWAII CAPE CANAVERAL KWAJALEIN GAITHERSBURG VANDENBERG COLORADO SPRINGS Navstar GPS - Operational Control Segment Current System Description

GPS Monitor Stations NIMA Monitor Stations GPS Ground Antennas Alternate Master Control Station (AMCS) VAFB, CA Crew Training Emulator System Simulator (AMCS) Vandenberg AFB, CA Transportable Ground Antenna Test Assets System Telecom Simulator (IIF) Cape Canaveral, FL New Master Control Station (NMCS) Improved operator interfaces IIR-M and IIF capabilities Integrated Mission Ops Support Center Operational Support System GPS Support Facility Launch and Early Orbit, Anomaly Resolution and Disposal Operations (LADO) System System Simulator (crew training) Navstar GPS - Operational Control Segment Future System Description L-Band S-Band Schriever AFB, CO

Summary Sustaining constellation performance –Launching ~3 per year –Keeping 2 launch-ready Modernizing by adding new signals and capabilities beginning next year Planning to execute for the next generation GPS is a global utility – Department of Defense is committed to responsible stewardship

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Modernization Baseline (IIRM/IIF) Requirement: ICD-GPS-200 requires minimum received power as measured by +3dB linear antenna with an assumed 2 dB atmospheric loss and other at End-of-Life Measured: Average RHCP received power at 5 degrees elevation across all satellites within block /-160.2/ L2 C/A /-156.9/ L1 C/A Measured Performance (dBW) (II/IIA/IIR) Signal Channel Block II/IIA/IIR Baseline L5 Composite (IIF only) / L2 L2C / L1 C/A Expected Performance (dBW) Requirement (dBW) Signal Channel Requirement: Based average RHCP received power at 5 degree elevation with an assumed 0.5 dB atmospheric loss (Compliance to ICD 200 still required)