Patent ID: 6861979
Filing Date: 2005-03-01
Classification: G01S

Abstract:
1. A method for detecting anomalous phase measurements in a satellite differential navigation system in which a first satellite receiver and a second satellite receiver each compute phase measurements on a plurality of satellite channels, said method comprising the steps, performed for each of a plurality of iterations, of: a) generating a combined phase difference vector; b) generating a phase mismatch vector representing the difference between said combined phase difference vector and an estimated combined phase difference vector; c) generating an averaged estimate vector representing the averaged estimate of said phase mismatch vector over said channels; d) generating a residual vector representing the difference between said phase mismatch vector and said averaged estimate vector; e) generating a vector of controlling signals by linear transformation of said residual vector and said averaged estimate vector; f) generating said estimated combined phase difference vector by successively storing components of said vector of controlling signals for each of said channels; and g) detecting anomalous phase measurements by analyzing said residual vector.