A method for determining an angle of arrival of a received radioelectric signal implemented by a receiving antenna system including either one rotating antenna having at least two receiving channels, or two rotating antennas with a same rotation speed each having a receiving channel, a first receiving channel having a first antenna diagram (Σ, D 1) and a second receiving channel having a second antenna diagram (Δ, D 2), said first and second antenna diagrams being different, the method comprising, in an operational phase, the steps of: - calculating and storing a series of ambiguous angle error measurement values obtained from receiving amplitude values of a radioelectric signal coming from an emitting source on said first and second receiving channels, said radioelectric signal being received on said first and second receiving channels by the rotating antenna(s) over a predetermined angular range, each angle error measurement value being representative of a ratio between receiving amplitude values on said first and second receiving channels, and corresponding to an angular deviation relative to a reference angular value, characterized in that the calculation of a series of ambiguous angle error measurement values comprises: - obtaining receiving amplitude values on said first and second receiving channels, each amplitude value being associated with an angular value; - for the first receiving channel, for each angular value, calculating a so-called synthetic receiving amplitude value, equal to the maximum between the receiving amplitude value on the first receiving channel and receiving amplitude value on the second receiving channel; - for each angular value, calculating an ambiguous angle error measurement value by obtaining the ratio between the receiving amplitude value on the second receiving channel and the corresponding synthetic receiving amplitude value; and in that the method further comprises the steps of: - calculating a convolution function on said angular range between said series of ambiguous angle error measurement values and a series of theoretical angle error measurement values of said receiving channels previously calculated and stored, - determining an angle of arrival of said received radioelectric signal as a function of an estimate of a maximum of said calculated convolution function. - calculating and storing a series of ambiguous angle error measurement values obtained from receiving amplitude values of a radioelectric signal coming from an emitting source on said first and second receiving channels, said radioelectric signal being received on said first and second receiving channels by the rotating antenna(s) over a predetermined angular range, each angle error measurement value being representative of a ratio between receiving amplitude values on said first and second receiving channels, and corresponding to an angular deviation relative to a reference angular value, - obtaining receiving amplitude values on said first and second receiving channels, each amplitude value being associated with an angular value; - for the first receiving channel, for each angular value, calculating a so-called synthetic receiving amplitude value, equal to the maximum between the receiving amplitude value on the first receiving channel and receiving amplitude value on the second receiving channel; - for each angular value, calculating an ambiguous angle error measurement value by obtaining the ratio between the receiving amplitude value on the second receiving channel and the corresponding synthetic receiving amplitude value; - calculating a convolution function on said angular range between said series of ambiguous angle error measurement values and a series of theoretical angle error measurement values of said receiving channels previously calculated and stored, - determining an angle of arrival of said received radioelectric signal as a function of an estimate of a maximum of said calculated convolution function.