FIELD: satellite systems.
SUBSTANCE: system and method are claimed for detecting errors of temporal displacement in a satellite system, on basis of Doppler displacement and speed of Doppler displacement alteration. In accordance to the invention, user terminal determines first and second time displacements, respectively related to first and second satellite beams from respectively first and second satellites. Further, user terminal determines Doppler displacement and speed of Doppler displacement alteration, related to first and second satellite beams. Temporal displacement is estimated on basis of measured Doppler displacement and speed of Doppler displacement alteration and then compared to time displacement, determined by the user terminal. If the result of comparison does not match a specific threshold, beam identification error is stated.
EFFECT: ensured identification of satellite beams.
6 cl, 12 dwg, 1 tbl
