  Nowadays, the Global Navigation Satellite Systems (GNSS), working like global
positioning systems, are the GPS (NAVSTAR) and the GLONASS, which only are
operative when several relativistic effects are corrected. In the next years
the Galileo system will be constructed, copying the GPS System if there is no
an alternative project. In this work, it will be exposed that there is one
alternative to the mere copy by means of the SYPOR project, using relativistic
concepts, and without utilize the Newtonian ideas that are in the basic
conception, so much of the GPS as of the GLONASS. According to the SYPOR
project, the Galileo system would be exact, with no need of corrections, and it
would have additional technological advantages.
