What is Galileo?
- Galileo is the global navigation satellite
system (GNSS) created by the European Union (EU) through the European GNSS
Galileo provides an alternative to both the United States
Global Positioning System and Russian Global
Navigation Satellite System, offering global coverage with
equal or greater precision.
The €10 billion project is named after the Italian
is intended to be a EU civilian GNSS that provides free and unrestricted
access to anyone with a compatible receiver.
designed to provide the highest possible precision (greater than GPS) to all
E1 Signal: 1575.42 MHz
E5a Signal: 1176.45 MHz
also provides an encrypted higher-bandwidth improved-precision commercial
is available to paying customers.
Galileo is designed to provide
horizontal and vertical position measurements with 1-metre precision.
Galileo is also to provide a new
global search and rescue (SAR) function as part of the MEOSAR system.
- The Galileo system will have five primary services:
- Open access navigation - This will be available without charge for use by anyone with appropriate mass-market equipment; simple timing, and positioning down to one meter.
- Commercial navigation (encrypted) - Accuracy to 1 centimeter and guaranteed service for which service providers will charge fees.
- Safety of life navigation - Open service; for applications where guaranteed precision is essential. Integrity messages will warn of errors.
- Public regulated navigation (encrypted) - Continuous availability even if other services are disabled in time of crisis. Government agencies will be main users.
- Search and rescue - System will pick up distress beacon locations; feasible to send feedback, e.g. confirming help is on its way.
Satellites orbit the Earth in three equally
spaced (120°) planes at an inclination of 56° and an altitude of 14,429
miles (23,222 km).
Each orbital plane consists of 8 operational
satellites and 2 active spares circling the Earth once every 14 hours and 7
Galileo navigation signals will provide good
coverage at latitudes up to 75°
north (which corresponds to Norway's North Cape).
To get a position fix, the receiver must be in the range of at least four satellites, three of which will be used to determine the user's location and the fourth to synchronize clocks of the receiver and the three other spacecraft.
- Initial services became available on 15
A complete 30-satellite Galileo
system (24 operational and 6 active spares) was expected by 2020.
list of available Galileo satellites. (status)
- Choose desired Galileo Satellite (NMEA ID) below to
view current location:
Do I Need
GPS receivers (GPSr) are able to use both Galileo and GPS satellites simultaneously.
GPS + Galileo provides improved coverage and quicker time to fix due to
having twice as many satellites available.
dual frequencies as standard, Galileo is set to deliver real-time
positioning accuracy down to the meter range.
For indoor, urban, canyon or mountainous areas, accuracy can be greatly improved over using GPS alone.