Method for locating a set of aircraft (A k), said set of aircraft (A k) being equipped with at least one onboard system for calculating distance and location (DME, IRS) and a device for sending and receiving ADS-B signals, a set of ADS-B (Bi) communication beacons being deployed on the ground, the position of each of the said ADS-B (Bi) beacons being known, characterized in that it comprises: • a step of permanently calibrating the time discrepancy biases (b21 i) between ADS-B beacons (B1 i, B2 i), estimated over the historical log of the passages within range of the beacons of said aircraft (A k), by means of the calculation of the mean discrepancy in propagation time between beacons of the downgoing ADS-B signals sent by the aircraft (A k) and corrected for the theoretical propagation delay, the said theoretical propagation delay being estimated on the basis of the a priori knowledge of the ground positions of the ADS-B beacons and of the dynamic positions of the aircraft (A k) calculated aboard by the available onboard equipment (DME, IRS) and transmitted via the messages of the said downgoing ADS-B signals; • a step of calculating pseudo-distances between any aircraft within range of the beacons (A l) and the set of the said ADS-B beacons (B1 i, B2 i), taking into account the calibrated time biases between beacons, the distance measurement on the sighting axis of each ADS-B beacon is done by adaptive filtering of a local-code sequence, corresponding to a code for identifying the ADS-B beacons deployed on the ground and placed at the start of each 1-second frame of the ADS-B messages sent; • a step of calculating the location of the said aircraft (A k) on the basis of the said pseudo-distances and of the matrix of the geometric sighting axes, the said location being carried out on the basis of a least-squares solution procedure equivalent to the instantaneous solution procedure for a GPS position, but by using only the upgoing reference signals sent by the ground beacons. • a step of permanently calibrating the time discrepancy biases (b21 i) between ADS-B beacons (B1 i, B2 i), estimated over the historical log of the passages within range of the beacons of said aircraft (A k), by means of the calculation of the mean discrepancy in propagation time between beacons of the downgoing ADS-B signals sent by the aircraft (A k) and corrected for the theoretical propagation delay, the said theoretical propagation delay being estimated on the basis of the a priori knowledge of the ground positions of the ADS-B beacons and of the dynamic positions of the aircraft (A k) calculated aboard by the available onboard equipment (DME, IRS) and transmitted via the messages of the said downgoing ADS-B signals; • a step of calculating pseudo-distances between any aircraft within range of the beacons (A l) and the set of the said ADS-B beacons (B1 i, B2 i), taking into account the calibrated time biases between beacons, the distance measurement on the sighting axis of each ADS-B beacon is done by adaptive filtering of a local-code sequence, corresponding to a code for identifying the ADS-B beacons deployed on the ground and placed at the start of each 1-second frame of the ADS-B messages sent; • a step of calculating the location of the said aircraft (A k) on the basis of the said pseudo-distances and of the matrix of the geometric sighting axes, the said location being carried out on the basis of a least-squares solution procedure equivalent to the instantaneous solution procedure for a GPS position, but by using only the upgoing reference signals sent by the ground beacons.