Study%20of%20the%20system%20GALILEO

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• Study of the system GALILEO
• European Satellite Navigation System

OUAKI Damien
July 2005 in Praha
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Why GALILEO?
Initiative of the European Union and European
Space agency

• Motivations
• More and more applications dependent on our
  location (need to know one hour, a position)
• Alternative for EU to the American military
  system GPS
• Need to have an innovative and successful system
  with precision and reliability
• Strictly civil control system

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GALILEO system
4 principal components
Global component

• Global component (30 satellites and ground
  segment)
• Local components
• User receivers and terminals
• Regional component

Local component
Users receivers and terminals
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• GALILEO satellite

• 2 atomic clocks
• - Rubidium Clock
• - Hydrogen Clock
• 3 orbital planes inclined at 54 and an altitude
  of 23,000 km
• 1,500 watts of electrical power
• weigh around 650 kg
• sophisticated electronics and high performance
  antennas

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Operating principle
Once the ground receiver receives the signals
from at least 4 satellites simultaneously, it can
calculate the exact position.
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Galileo services

• OS for Open Service
• CS for Commercial Service
• SOL for Safety of Life Service
• PRS for Public Regulated Service
• SAR for Search And Rescue service

5 principle services
Galileo signals frequency for these services E5a
(1164-1189 MHZ) E5b(1189-1214 MHZ) E6(1260-1330
MHZ) L1(1563-1587 MHZ)
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Conclusion

• GALILEO is at the same time the competitor and
  the complement of GPS
• Nearly perfect availability of the signal
• Better services for the user
• Greater reliability and a less vulnerability
• Probably a creation of 140000 jobs
• Economic repercussions of 200 billion Euros for
  EU in 2020