compass satellite navigation system development 110408€¦ · compass satellite navigation system...
TRANSCRIPT
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11/5/2008 1
COMPASS Satellite Navigation SystemDevelopment
For ‘PNT Challenges and Opportunities’ SymposiumNov. 5th-6th, 2008
Stanford University
Chong CaoChina Satellite Navigation Engineering Center
Guifei JingNational Remote Sensing Center of China
Ming LuoStanford University
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Mr. Chong Cao
• Research Fellow of China Research Institute of Radio-wave Propagation
• Director of Compass (Bei Dou) Civil Application Market andIndustrialization Expert Committee
• Director of Editorial Committee of GNSS world of China Magazine
• Director of Information Consultant Center of China Technical ApplicationAssociation for Global Positioning System.
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Dr. Guifei Jing
Head of Navigation Division of National Remote Sensing Center,Ministry of Science and Technology of China (NRSCC/MOST)
Project manager in Division of Information Technology ofDepartment of High Tech Development and Industrialization ofMOST.
Focused on Europe-China cooperation on Galileo project,Management of key S&T programs related to Positioningtechnology.
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Outline
Architecture of the System
Steps of the Deployment
Applications of Compass in Chinanowadays
Principles of the System
Summary
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China decided to build an independentsatellite navigation system in 1980’s.
In 2003, the Compass DemonstrationNavigation System was built and thesystem has been used in many areasnowadays in China.
Now the COMPASS global navigationsystem is under construction.
China Satellite Navigation ProjectCenter is in charge of the construction.
Overview
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Space Segment
5 GSO satellites and not more than 30 MEO satellites
Constellation
GSO Satellite
MEO Satellite
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Ground Segment
The ground segment consists of Master Control Station,
Upload Stations and Monitor Stations.
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User Segment
The user segment consists of COMPASS user terminals
and interoperable terminals.
User terminals of COMPASS system
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Frequencies & Signals
Frequencies
B1,B1-2, B2, B3, B1-BOC, L5
Signals:
B1(QPSK), B1-MBOC(6,1,1/11) , B1-2 (QPSK),
B2(QPSK), B2-BOC(10,5 ) ,
B3(QPSK), B3BOC(15,2.5),
L5 (QPSK).
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Services
Two kinds of global services
Open Service:free and open to users
– Positioning Accuracy: 10 m
– Timing Accuracy: 20 ns
– Velocity Accuracy: 0.2 m/s
Authorized Service: ensure highly reliable use even in
complex situation.
Two kinds of regional services
Wide area differential service:
– Positioning accuracy: 1 m
short message service.
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Outline
Architecture of the System
Steps of the Deployment
Applications of Compass in Chinanowadays
Principles of the System
Summary
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COMPASS Navigation Demonstration System.
Three GEO satellites have been launched since 2000, the
demonstration system can provide some basic services
including positioning, timing, and short-message
communication.
The 1st Step
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COMPASS Navigation Satellite System.
As a global system COMPASS will cover Asia-Pacific areafirstly in about 2010.
2010 The near future
The 2nd Step
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After the technical configuration of COMPASS has been
determined, the first MEO satellite of Compass was launched
in Apr. 2007. The main tasks of M1 were to test satellite
technology (IOV) and to secure the frequency filings. The
ground segment is ready, and constellation deployment is in
schedule.
Compass-M1 Experimentation
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Some Experiment Results
Overlap orbit errors: 4.3 meter (Position).
SLR Comparison errors: 0.058 meter.
Compatible Positioning errors ( with GPS) : 10 meter (95%).
Orbit prediction maximum errors: 25 meter (24 hours).
Clock prediction maximum errors: 11 ns (24 hours).
Compass-M1 Experimentation
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Launches
2010 2011
……
2009
Planed launches in recent two years
10 rockets of Long-March 3 will be launched in recent two years,more than 10 satellites will be put into use, after that the system canoffer services regionally.
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Outline
Architecture of the System
Steps of the Deployment
Applications of Compass in Chinanowadays
Principles of the System
Summary
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The COMPASS Navigation Demonstration System has played animportant role in many areas.
- telecommunications,
- transportation,
- meteorology,
- forest fire prevention,
- disaster forecast,
- Marine.
Applications at One Glance
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Disaster Control
Forest Fire Prevention System
2006年黑龙江大兴安岭火灾2006年黑龙江大兴安岭火灾
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Disaster Control
Emergency Position &Information Services in Sichuan Earthquake
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Marine Application
Offshore Tide Monitor Data Transmission
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Marine Application
Offshore Fishing Ship Control System
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Marine Search and rescue
Marine Application
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Transportation Application
Qinghai-Tibet Plateau Railway Monitor and Control System
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Transportation Application
Dangerous Goods Tracking and Control System
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Offshore and Inland Water Transport Control System
Transportation Application
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Outline
Architecture of the System
Steps of the Deployment
Applications of Compass in Chinanowadays
Principles of the System
Summary
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Principles of the State Policy
Openness COMPASS will Provide SIS for civil services,COMPASS applications are encouraged all over theworld, open access of all direct users to the civilsignals will be free of charge. Independency COMPASS can provide services for usersindependently. The Construction, operation and development ofCOMPASS will be independent considering nationalsecurity and user benefit.
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Compatibility COMPASS is willing to be compatible and interoperablewith other satellite navigation systems, and users can getbetter services with interoperable terminals. The developmentand manufacture of the interoperable terminals will beencouraged.Gradualness In order to control risks, COMPASS will be developedstep by step based on technology and economy of China. COMPASS will provide long-term continuous servicesfor users, and improve system performance incessantly.
Principles of the State Policy
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Nowadays Compass is promoting the cooperation
with other GNSS, and focusing on:
- Compatibility of frequency
- Interoperability with multi-systems in sense of signals, geodesyreference and time reference
- Development of common standards for GNSS application
- GNSS receiver test and certification
- Future navigation technology development
- Search and rescue service implementation
- Integrity monitoring
Cooperation
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Outline
Architecture of the System
Steps of the Deployment
Applications of Compass in Chinanowadays
Principles of the System
Summary
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The development of COMPASS is a national
strategy of China.
COMPASS hopes to be an essential element of
the international GNSS society.
COMPASS is being constructed smoothly.
China encourages international cooperation to
ensure compatibility and interoperability with
other systems.
Summary
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Thanksfor your attention!