Galileo (Europe)
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Galileo is the Europeans GNSS which will be independent to the NavStar system. This way there will be alternative system to use should the commonly known GPS become unavailable and will mean that Europe will gain a little more independence. The Galileo will also have a number of extra features added to aid Search and Rescue effects1.
The concept of operations will be the same as the NavStar GPS by using a network of satellite to give position and time information to receivers to allow devices to calculate their position. However, unlike the Navstar GPS the Galileo will only have 3 orbital planes.
The total number of satellite is aimed to be 30 which will include three spares. This network will hope to be fully completed around the 2015.

GNSS Applications (embedded from Youtube)

The Galileo system will have five main services:

  • Open Access Navigation: This will be 'free to air' and for use by the mass market; Simple timing and positioning down to 1 metre.
  • Commercial Navigation (Encrypted): High accuracy to the centimetre; Guaranteed service for which service providers will charge fees.
  • Safety Of Life Navigation: Open service; For applications where guaranteed accuracy is essential; Integrity messages will warn of errors.
  • Public Regulated Navigation (Encrypted): Continuous availability even in time of crisis; Government agencies will be main users.
  • Search And Rescue: System will pick up distress beacon locations; Feasible to send feedback, confirming help is on its way2.

1. ESA. (September 2011). What is Galileo? Retrieved from
2. Wiki-Galileo. (2011). Galileo (satellite navigation). Retrieved from
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