State Department GPS Activities

1
State DepartmentGPS Activities

• Bill Klepczynski, U.S. State Department

2
Thanks to Chris Hegarty of Mitre for help with
some of the slides
3
US Policy

• Consistent national policy statements from
  Executive and Legislative Branches
• Congressional guidance, 1983
• Presidential Decision Directive, March 28, 1996
• U.S. Public Law, December 1998
• U.S. Space-based Positioning, Navigation and
  Timing Policy, December 15, 2004
• Civil GPS signals to be provided free of direct
  user charges (since 1983)
• Selective Availability ended on May 2000 with no
  intent to turn back on
• Promote common standards for worldwide
  interoperability

4
US GPS Policy, contd.

• Promote acceptance and use of GPS
• Encourage acceptance of GPS into peaceful civil,
  commercial and scientific applications
• Promote international cooperation in using GPS
  for peaceful purposes
• Promote safety and efficiency in transportation
• Encourage private investment in GPS
• Strengthen and maintain national security

5
Compatibility and Interoperability

• Compatibility
• not cause degradation for users, i.e., one system
  will not cause interference to the other system
• Interoperability
• provide improved performance compared to stand
  alone system, i.e., user gets solutions that are
  better than can be achieved by either system
  alone
• Goal Seamless worldwide service for all civil
  and commercial users

6
GPS signals
7
U.S.-European Cooperation

• U.S. and E.C. have been working towards a
  mutually acceptable framework agreement on
  cooperation
• Recognize benefits for civil users if systems are
  compatible and interoperable
• Wants cooperation to lead to best GNSS system of
  systems
• Europe benefits from cooperation
• Lessons learned from U.S. experience
• Could reduce cost and schedule risk

8
June 2004 U.S.-European Community Agreement

• Signed on June 26, 2004 in Dublin
• Key provisions
• Baseline GALILEO L1 signals that both sides agree
  are interoperable and compatible with GPS
• Compatibility includes both radio frequency and
  national security aspects
• Number of articles to promote open markets and
  fair trade
• Agreement to establish four follow-on working
  groups
• A Compatibility/interoperability
• B Trade
• C Cooperation on next-generation satnav
• D National security

9
Working Group Status

• WGA (Compatibility/Interoperability)
• March 2005 Brussels
• Focus on terms of reference and work program
• L1F/L1C signal optimization
• GPS-GALILEO time offset (GGTO) and reference
  frames
• L5/E5a compatibility
• June 2005 Los Angeles
• Further discussion on same topics as 1st meeting
• EU L1F optimized signal
• October 2005 Fucino
• Remaining WGs no meeting dates established
• Working Group B (Trade) U.S. prep meeting
  recently held
• Working Group C (Next Generation) U.S. prep
  meeting recently held
• Working Group D (National Security) U.S. prep
  meeting recently held maybe November 2005

10
GPS and Galileo Signal Spectra
C/A
(CS, SoL)
CS
(OS)
PRS
OS/GPS III
PRS
L5
E5b
E5a
M
P(Y)
L1 (1575.42 MHz)
E6 (1278.75 MHz)
L2 (1227.6 MHz)
L5 (1176.45 MHz)
E5 (1207.14 MHz)
BOC(15,10) modulation option shown for E5a/E5b.
Prepared by Chris Hegarty, MITRE
11
GPS-GLONASS Activities

• Signed on December 10, 2004 in Washington, DC
• Key provisions agreed to by both sides
• Maintain interoperability and compatibility of
  GPS and GLONASS
• Cooperate on matters of mutual interest related
  to PNT signals and systems, value added services,
  and global navigation and timing goods in
  relevant international organizations and fora
• Will continue to provide GPS and GLONASS civil
  signals on a continuous, worldwide basis, free of
  direct user fees
• Agreement to establish two follow-on working
  groups
• 1 Compatibility/interoperability
• 2 COSPAS-SARSAT

12
GPS-GLONASS Working Group Status

• WG1 (Compatibility Interoperability) Col.
  Mark Crews
• October 2005 Moscow
• WG2 (COSPAS-SARSAT) Ajay Mehta
• June 2004 London
• November 2005 - Montreal

13
GNSS Frequency Bands
RNSS Radio Navigation Satellite Service ARNS
Aeronautical Radio Navigation Service
G1
(E5aE5b)
E6
(E2L1E1)
14
U.S.-Japan Cooperation GPS and QZSS

• Based on 1998 Joint Statement
• Common standards
• Systems use GPS L1, L2, and L5
• QZSS will improve performance in urban canyons
  and mountains
• U.S. and Japan have been conducting scheduled
  technical working groups to ensure
  interoperability
• Plenary Meeting held November 2004

15
Brazil

• U.S. Delegation visited Brazil in October 2003 to
  discuss use of GPS, further collaboration on
  application research, and the potential for a
  cooperation agreement
• Three days spent in Brasilia meeting with various
  ministries representatives
• Two days in Sao Paulo meeting with US Counselor,
  American Chamber of Commerce, and industry
  representatives
• US-Brazil GPS conference held in September 2004
  in Sao Paulo

16
General Summary

• Cooperation agreements address national security,
  economic, and technical issues
• Protect compatibility
• Encourages civil interoperability
• Provide service to civil users on a continuous,
  worldwide basis, free of direct user fees