Method for locating a jamming source jamming signals of a satellite navigation system based on detected powers received by at least one receiver of signals from the satellite navigation system on board a carrier, comprising an estimation (12), for each satellite (k) of the navigation system, of the power of the noise at the output of each receiver according to the bearing angle with respect to the carrier and the distance with respect to the carrier, a calculation of the sum of said estimated powers, and an extraction of the local maxima in terms of bearing and distance by using a synthetic aperture antenna carrying out a coherent integration (6) of said received signals in the direction of each bearing angle by using the known movement of the carrier, in which said estimation (12) of the power of the noise at the output of each receiver uses a plurality of coherent integrators and a plurality of non-coherent integrators, with durations matched to the transit time of a source in the beam of the antenna for va
