15 August 2005
Lt Gen Michael HamelCommander
Space and Missile Systems Center
ION GNSS
Plenary Session
26 September 2006
2
60 80 100 120 140 160-80
-60
-40
-20
0
20
40
60
80 QZSS constellation QZSS constellation
GPS Enterprise
Department of Transportation•U.S. Coast Guard•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 and shipping• Aviation• Offshore drilling• Fishing and boating
International Cooperation• Japan – QZSS• Russia - GLONASS• Europe and other countries
3
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 Evolution
4
• Launched a new era of GPS services – First GPS IIR-M (14) launched 25 Sep 05, operational on 16 Dec 05– New military signal (M-Code) and new civil signal (L2C)– GPS IIR-M (15) launched 25 Sep 06
• Fielded operational improvements– Legacy Accuracy Improvement Initiative--improves accuracy 10-50%– Provide “zero age of data” to warfighters– Continue to mature GPS Ops Center (GPSOC) capabilities
• New acquisition strategies for next generation GPS– GPS III satellites – block development approach– OCX Operational Control Segment – incremental design -development– MUE/MSR – Modernized User Equipment/Modernized Space
Receiver contracts underway/in work• Established new USG interagency GPS governance
processes – National PNT EXCOM (NPEC) and Coordinating Office (NPCO)
Recent Accomplishments
5
GPS IIR-15(M)
• Launched Monday, 25 September 2006
– 1450 Eastern time– Cape Canaveral, FL
• Second Modernized Block IIR satellite• Will broadcast
PRN Code 31• Anticipate setting
healthy mid-October
6
Plaque on GPS IIR-15(M)
7
Continuous Performance Improvement
• 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
8
• Sustaining capabilities for military and civil users worldwide– Maintain ground systems/on-orbit satellites, launch new satellites –
partnership across AF Space Command– Fielding GPS enhancements, such as L-AII
• Modernizing constellation with new signals and capabilities – Second IIR-M launch Sep 06, first IIF launch 2008, first III launch 2013– New civil and military GPS signals– Transitioning control segment from legacy to new Ops Control
Segment (OCS) in Spring ‘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
• Managing GPS systems & supporting stakeholders– Technical baselines, interfaces, performance– Supporting/participating in key fora – NPEC/NPCO, DSB, IRT, ION
GPS Program Responsibilities