METHODS AND DEVICES FOR NAVIGATION SYSTEM WITH LOWER SUSCEPTIBILITY TO INTENDED AND UNINTENDED INTERFERENCES Russian patent published in 2011 - IPC G01S1/00 

FIELD: physics.

SUBSTANCE: navigation system integrated with GPS uses network of surface reference stations and low earth orbit (LEO) satellites. Ranging configuration within general GPS satellite visibility range is set to intercommunicate reference station and user. Another configuration within low earth orbit satellite general visibility range is set for aforesaid reference station and user. Surface stations generate auxiliary real time signals to allow measuring the phase of LEO satellite GPS signal carrier. Said auxiliary data is transmitted via LEO satellites to user receiver at high power to penetrate through ambient interferences. User receives LEO satellite phase-synchronised carrier to demodulate auxiliary data and measure carrier phase and auxiliary data to allow longer matched measurements of GPS signals. Thus, system recovers GPS signals otherwise lost because of interferences.

EFFECT: higher noise immunity.

16 cl, 18 dwg