GPS and satelite navigation system

A method for determining positional coordinates, comprising the steps of:

• transmitting an unmodulated first plurality of signals to a plurality of fixed relays from a control facility;
• receiving the unmodulated first plurality of signals from the fixed relays and an unmodulated second plurality of signals from a plurality of navigational satellites at the control facility and at a remote location;
• modulating the unmodulated first plurality of signals and the unmodulated second plurality of signals received at the control facility and retransmitting the modulated first plurality of signals and the modulated second plurality of signals to the remote location;
• receiving the modulated first plurality of signals and the modulated second plurality of signals from the control facility at the remote location;
• and
• processing the unmodulated first plurality of signals, the modulated first plurality of signals, the unmodulated second plurality of signals, and the modulated second plurality of signals received at the remote location to minimize errors in the data in the unmodulated first plurality of signals and in the modulated first plurality of signals with the data in the unmodulated second plurality of signals and in the modulated second plurality of signals to obtain accurate positional coordinates.