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There is introduced the concept of an ambiguity function of a time-spatial vector signal. Unlike the well known radar signal ambiguity function, the introduced matrix allows the estimation of the potential resolution ability not only by range and Doppler velocity, but also by angle co-ordinate parameters in the case of joint estimation of all these parameters with the help of radars with full polarization analysis.

ambiguity function; polarization radars; vector time-spatial signal