The invention relates to a radar comprising: means 1 to 8 for transmitting a succession of radar pulses at respective frequencies; means 7 to 12 for receiving corresponding echoes; means for submitting echoes. , as a function of the transmission frequency, to a Fourier transform allowing to deduce a plurality of transformation signals representing a distribution, as a function of their differential distances, of pairs of dispersion sources formed by the dispersion sources of a complex target 20 and a single mobile external dispersion source 21, and - means 16 to 19 for comparing the transformation signals obtained when the mobile external dispersion source is in a first position near the complex target with the transformation obtained when the external mobile dispersion source is at a second position close to the complex target, or is complete In this way, we can deduce the positions of the dispersion sources of the complex target. / p
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