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GPS Status & Modernization Briefing to National PNT Advisory Board 29 March 2007. Col Allan Ballenger Commander, GPS Wing. Overview. GPS System Description GPS Constellation Status & Availability Recent GPS Accomplishments GPS Modernization Summary.

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GPS Status & Modernization

Briefing to National

PNT Advisory Board

29 March 2007

Col Allan Ballenger

Commander, GPS Wing


Overview
Overview

  • GPS System Description

  • GPS Constellation Status & Availability

  • Recent GPS Accomplishments

  • GPS Modernization

  • Summary

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



GPS System DescriptionGPS Enterprise

  • International Cooperation

  • Japan – QZSS

  • Russia - GLONASS

  • Europe and other countries

  • 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

  • Department of Transportation

    • Federal Aviation Administration (FAA)

  • Department of Homeland Security

    • Coast Guard


GPS System DescriptionWhat Are the GPS Segments?


GPS Constellation Status & Availabilityas of March 2007

  • 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

as of 26 Mar 07


Gps constellation status availability growing to 30 satellites
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


Recent GPS Accomplishments

  • 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 AccomplishmentsOur Mission Successes

GPS IIR-14(M)

25 Sep 05

1st Modernized

GPS Satellite

GPS IIR-13

6 Nov 04

GPS IIR-15(M)

25 Sep 06

GPS IIR-16(M)

17 Nov 06

A world class team providing worldwide position, navigation & timing!


Accuracy

Current Requirement

Current Objective

Recent GPS Accomplishments Continuous Performance Improvement

  • Key Measures of Effectiveness help evaluate GPS services

    • Accuracy

    • Bounded inaccuracy

    • Assured Availability

    • Integrity

    • Resistance to RF Interference/Jamming


Recent GPS AccomplishmentsLeveraging Civil/Commercial Technology


GPS ModernizationCapability Evolution

Space Segment

  • Modernized(Block IIR-M)

  • 2nd civil signal (L2C)

  • M-Code signals (L1M, L2M)

  • Flex A/J power (+7dB)

  • Modernized(Block IIF)

  • 3rd civil signal (L5)

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

Control Segment

Legacy

  • TT&C

  • L1 & L2 monitoring

Upgraded(AEP)

  • IIR-M IIF TT&C

  • WAGE, AII, LADO

  • SAASM

  • New MCS/AMCS

Modernized(OCX V1)

  • New Architecture

  • Signal Monitoring

GPS III(OCX V2)

  • GPS III TT&C

  • NAVWAR, GNOC

  • L1C, L2C, L5

  • Flex Power

  • Real-Time C2

User Segment

Legacy

  • Man Pack

  • MAGR, PLGR

  • RCVR-3A, 3S

  • OH, UH

  • FRPA, CRPA

Upgraded

  • DAGR

  • CSEL

Modernized

  • MUE

  • MSR

  • GAS-1

  • MAGR2K

  • GB-GRAM


Summary

  • 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/systemby 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

  • ManagingGPS 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


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