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 BallengerCommander, GPS Wing

Slide 2I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

GPS System Description GPS Constellation Status & Availability Recent GPS Accomplishments GPS Modernization Summary

Overview

Department of Defense and Air Force are committedto responsible stewardship of GPS as a global utility

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

GPS System DescriptionMission

Slide 4I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

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 DescriptionGPS Enterprise

Department of Homeland Security•Coast Guard

Slide 5I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

GPS System DescriptionWhat Are the GPS Segments?

Slide 6I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

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 SatellitesBaseline Constellation: 24

GPS Constellation Status & Availabilityas of March 2007

as of 26 Mar 07

Slide 7I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

GPS Constellation Status & AvailabilityGrowing to 30+ Satellites

IIR-15(M) launched: Monday, 25 Sep 06 Set healthy: Thursday, 12 Oct 06, SVN 52 - PRN 31 17 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

Slide 8I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

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

Slide 9I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

GPS IIR-136 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

Slide 10I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

Key Measures of Effectiveness help evaluate GPS services Accuracy Bounded inaccuracy Assured Availability Integrity Resistance to RF Interference/Jamming

4.6 4.3

3.0 2.72.1 1.8 1.5

1.1

0

1

2

3

4

5

6

7

1990 1992 1994 1996 1997 1999 2001 2005

Year

RM

S U

RE

(m)

AccuracyCurrent Requirement

Current Objective

Recent GPS Accomplishments Continuous Performance Improvement

Slide 11I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

PLGR (Legacy) DAGRSingle (L1 only) Frequency Dual (L1/L2)

PPS-SM Security SAASMText only Display GUI w/maps

5 Maximum Satellites All-In-View24 dB Anti-Jam 41 dB (+)

6 minutes TTFF 1 minute60 sec TTSF 20 sec

2.75 lbs Weight .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 hr Reliability 5000 hr

Recent GPS AccomplishmentsLeveraging Civil/Commercial Technology

Slide 12I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

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 SegmentModernized (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 SegmentLegacy• 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 ModernizationCapability Evolution

Slide 13I n t e g r i t y - S e r v i c e - E x c e l l e n c eGPSW Brief to PNT Advisory Board 29 Mar 07 v5

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 FACADepartment of Defense and Air Force are committed to responsible stewardship of GPS as a global

utility

Summary