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GPS Status & Modernization Briefing to National PNT Advisory Board 29 March 2007

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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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slide1

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

slide4

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
slide6

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

slide8

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
slide9

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!

slide10

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
slide12

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
slide13

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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