Dual antenna diversity method to detect GPS signal tampering

摘要: A method of detecting GPS signal tampering uses two receivers. first receiver measures carrier phases or more satellite signals and a tampered signal. second the baseline vector between antennas is measured. Direction cosine vectors are computed dot product from to translate measurements made at receivers virtual zero condition. The phase double differenced obtain difference residuals. test statistic residuals tested for coherency. An inconsistency in measured flagged when there an coherence indicating present.