u.s. space-based pnt policy and modernization of gps · 10-11-2008 · u.s. space-based pnt policy...
TRANSCRIPT
U.S. Space-based PNT Policyand
Modernization of GPS
4th Satellite Positioning Research and Application Center Forum
Tokyo, Japan
November 10, 2008
Hank Skalski
Liaison to Air Force Space Command
U.S. Department of Transportation 1
4th SPAC Forum – Nov 10, 2008, Tokyo
Overview
• U.S. Space-based PNT Policy
• GPS Constellation Status
• Modernization of GPS
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4th SPAC Forum – Nov 10, 2008, Tokyo
U.S. Space-Based PNT Policy
GOAL: Ensure the U.S. maintains space-based PNT services, augmentation, back-up, and service denial capabilities that…
ASSURE SERVICE Provide uninterrupted availability of PNT services
MEET DEMANDSMeet growing national, homeland, economic security, and civil requirements, and scientific and commercial demands
LEAD MILITARILY Remain the pre-eminent military space-based PNT service
STAY COMPETITIVEContinue to provide civil services that exceed or are competitive with foreign civil space-based PNT services and augmentation systems
INTEGRATE GLOBALLYRemain essential components of internationally accepted PNT services
LEAD TECHNICALLYPromote U.S. technological leadership in applications involving space-based PNT services
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4th SPAC Forum – Nov 10, 2008, Tokyo
U.S. Space-Based PNT Policy
• No direct user fees for civil GPS services
• Open public signal structures for all civil services
– Promotes equal access for user equipment manufacture, applications development and value-added services
– Facilitates open market-driven competition
• Encourage use of GPS time, geodesy and signal standards
• Promote global compatibility and interoperability of future systems with GPS
• Protect the current radionavigation spectrum from disruption and interference
• Recognition of national and international security issues and protect against misuse
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4th SPAC Forum – Nov 10, 2008, Tokyo
U.S. Space-Based PNT Policy
• Recognizes the changing international scene
– Other nations are implementing space-based systems that provide PNT services
• Established National Executive Committee (EXCOM) for Space-Based PNT
– Chaired by Deputy Secretaries of Defense & Transportation
– Broad membership to include civil and military interests
– Supported by National Coordination Office with staff from member agencies
• Very active senior U.S. Government leadership
– National EXCOM Meetings: Nov 07, Mar 08, Jul 08, Nov 08
• Executive Steering Group Meetings: Oct 07, Jan 08, Jun 08, Oct 08
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WHITE HOUSE
ADVISORY BOARD
Sponsor: NASA
NATIONALEXECUTIVE COMMITTEEFOR SPACE-BASED PNT
Executive Steering Group
Co-Chairs: Defense, Transportation
NATIONAL COORDINATION OFFICE
Host: Commerce
GPS International Working Group
Chair: State
Engineering Forum
Co-Chairs: Defense, Transportation
Ad HocWorking Groups
Defense
Transportation
State
Interior
Agriculture
Commerce
Homeland Security
Joint Chiefs of Staff
NASA
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National Space-Based PNTOrganizational Structure
4th SPAC Forum – Nov 10, 2008, Tokyo
Key Executive Committee Activities
• Program Coordination
– Five-Year National Plan
– National PNT Architecture
– GPS Modernization
– Civil GPS Funding
– Nationwide Differential GPS
– Enhanced LORAN
– Distress Alerting Satellite
System
• International Cooperation
– Bilateral
– Multilateral
• Spectrum Management
– Interference Detection and
Mitigation Plan
– Spectrum Protection Plan
• Outreach
– Publications, websites
– Educational exhibit
– Conferences, workshops,
other venues
– Coordination of U.S.
message
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4th SPAC Forum – Nov 10, 2008, Tokyo
Accomplishments in Past Year
• Implemented GPS Architecture Evolution Plan
– Switched to entirely new ground control segment
– Activated fully-capable backup control station
• Launched three GPS II-R(M) satellites
• Announced GPS III without Selective Availability
• Awarded GPS IIIA contract
• Awarded contracts for Next Generation Operational
Control Segment
• Held GPS III Requirements summit
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4th SPAC Forum – Nov 10, 2008, Tokyo
Accomplishments in Past Year
• Renewed offer to ICAO on GPS/SPS, adding WAAS
• Added members to EXCOM: Interior and Agriculture
• Released public fact sheet on Interference Detection and Mitigation
• Decided to continue inland component of Nationwide Differential GPS
• Established Maritime Information Operations Center
• Renewed offer to IMO on GPS/SPS
• Organized GNSS Technological Innovation Summit through Asia Pacific Economic Cooperation (APEC)
• Held GPS-Galileo trade discussions with Europe
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4th SPAC Forum – Nov 10, 2008, Tokyo
• Published final semi-codeless GPS transition plan
• Approved National PNT Architecture Guidance Memorandum
• Published 4th Edition GPS SPS Performance Standard
• Published 1st WAAS Performance Standard
• Held 1st U.S.-EC plenary meeting under GPS-Galileo Agreement
• Completed agreements with Japan to establish QZSS monitoring stations in Hawaii and Guam
• Held sixth plenary meeting with Japan [for CGSIC only:]
Accomplishments in Past Year
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4th SPAC Forum – Nov 10, 2008, Tokyo
Overview
• U.S. Space-based PNT Policy
• GPS Constellation Status
• Modernization of GPS
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4th SPAC Forum – Nov 10, 2008, Tokyo
GPS Constellation Status
• 13 Block IIA
• 12 Block IIR
• 6 Block IIR-M
– Transmitting new second civil signal
• Continuously assessing constellation health to determine launch need
– 2 Block IIR-M’s remaining
• Global GPS civil service performance commitment met continuously since December 1993
31 Operational Satellites(Baseline Constellation: 24)
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4th SPAC Forum – Nov 10, 2008, Tokyo
2000 ORD
• Signal-In-Space (SIS) User Range Error (URE)
• One-year RMS as of June 08: 0.92 meters
• Zero Age-Of-Data (AOD) URE
• One-year RMS as of June 08: 0.22 meters
URE
Current GPS Accuracy
System accuracy far exceeds published standard
Signal-in-Space User Range Error (SIS URE) the difference between a GPS satellite’s navigation data (position and clock) and the truth, projected on the line-of-sight to the user
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4th SPAC Forum – Nov 10, 2008, Tokyo
• GPS IIR(M): 3 Successful launches since Oct 07
• GPS IIF: Completed all functional and performance
tests; Currently in vacuum test
• GPS IIIA: Awarded to Lockheed Martin Space Systems
Company (Newton, PA), May 08
• Operational Control Segment (OCS)
– Architecture Evolution Plan (AEP)/Launch & Early Orbit, Anomaly Resolution & Disposal Operations (LADO) switch over – Sep 07
– Alternate Master Control Station fully functional
• Next Generation Operational Control Segment (OCX)
– Needed for Block III satellites & full functionality of modernized signals
– Awarded Phase A contracts to Northrop Grumman & Raytheon, Nov 07
Recent Accomplishments
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4th SPAC Forum – Nov 10, 2008, Tokyo
Overview
• U.S. Space-based PNT Policy
• GPS Constellation Status
• Modernization of GPS
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4th SPAC Forum – Nov 10, 2008, Tokyo
Block IIA/IIR Block IIIBlock IIR-M, IIF• Backward compatibility
• 4th civil signal (L1C)
• Increased accuracy
• Increased anti-jam power
• Assured availability
• Navigation surety
• Controlled integrity
• Increased security
• System survivability
IIR-M: IIA/IIR capabilities plus
• 2nd civil signal (L2C)
•M-Code (L1M & L2M)
IIF: IIR-M capability plus
• 3rd civil signal (L5)
• Anti-jam flex power
Basic GPS
• Standard Service
– Single frequency (L1)
– Coarse acquisition (C/A) code navigation
• Precise Service
– Y-Code (L1Y & L2Y)
– Y-Code navigation
Increasing System Capabilities with Increasing Defense / Civil Benefit
GPS Modernization Program
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4th SPAC Forum – Nov 10, 2008, Tokyo
GPS Modernization – New Civil Signals
• Second civil signal “L2C”
– Designed to meet commercial and scientific needs
– Higher accuracy through ionospheric correction
– Available since 2005 without data message
– Phased roll-out of CNAV message starting in 2009
– Full capability: 24 satellites ~2016
• Third civil signal “L5”
– Designed to meet demanding requirements for transportation safety-of-life
– Uses highly protected Aeronautical Radio Navigation Service (ARNS) band
– 1st launch: 2009; 24 satellites ~2018
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4th SPAC Forum – Nov 10, 2008, Tokyo
Fourth Civil Signal (L1C)
• Designed with international partners for interoperability
• Modernized civil signal at L1 frequency
– More robust navigation across a broad range of user applications
– Improved performance in challenged tracking environments
– Original signal retained for backward compatibility
• Specification developed in cooperation with industry, recently completed
• Launches with GPS III in 2014
• On 24 satellites by ~2021
Under trees
Urban Canyons
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4th SPAC Forum – Nov 10, 2008, Tokyo
Summary
GPS is a Critical Component of the
Global Information InfrastructureSatellite
Operations
Power Grids
Personal Navigation
Communications
Fishing & Boating
Oil Exploration
Trucking
Surveying &Mapping
Precision AgricultureDisease Control
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Aviation
Shipping
Rail Control
4th SPAC Forum – Nov 10, 2008, Tokyo
Summary
• U.S. policy encourages worldwide use of civil GPS and augmentations
• GPS performance is better than ever and will continue to improve
– New civil GPS signal available now
– Many additional upgrades scheduled
– Augmentations, such as QZSS, enable even higher performance
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4th SPAC Forum – Nov 10, 2008, Tokyo
Contact Information
Hank Skalski
DOT Liaison to Air Force Space Command
U.S. Department of Transportation
150 Vandenberg St., Suite 1105
Peterson AFB, Colorado 80914
+1.719.554.2570 (office)+1.719.554.6719 (fax)
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