The network of Galileo
navigation satellites, the European substitute to the American GPS system, will
on Friday a key step in its development with the launch of two new devices that
will confirm the program for the first time, as reported by the European Space
Agency (ESA).
Until now in orbit two
experimental satellites which were launched in October 2011, called Giove-A and
Giove-B, but were needed at least two more for the network was able to
independently determine the location of an object Earth. It is a matter of geometry.
For users, however, will not be available until 2015.
