- Method for locating a transmitter device on the basis of N stations in a communications network, each of the stations being equipped with at least one receiver, by using at least one dating reference frame common to all the N stations, the network comprising at least one master station adapted to manage measurements of instant of arrival, characterized in that it comprises at least the following steps: • triggering one or more synchronized acquisitions on N stations for a given frequency, a bandwidth and a given instant t, the said values being chosen as a function of a transmitter device of interest characterized by its frequency, its bandwidth, • for an acquisition: • calculating the N(N-1)/2 measurements of arrival time delay TDOA between all the N(N-1)/2 pairs of stations, • choosing a number P of measurements out of the M=N(N-1)/2 measurements, with 3<P<N(N-1)/2 and forming K vectors of measurements associated with the K possible combinations of P out of M with: K = M ! P ! M − P ! • for each of the K vectors, estimating an elementary value of location of the transmitter device by minimizing a quadratic criterion taking into account a matrix corresponding to the covariance of the P measurements of arrival time delay and by iteration starting from a first value of a vector X 0 of initial position of the transmitter, the position is situated as near as possible to the desired minimum and then by iterating on the first estimation by successively estimating locations making it possible to decrease the criterion to be minimized until a threshold value is satisfied, • calculating a merged location value on the basis of the estimated values of elementary location. • triggering one or more synchronized acquisitions on N stations for a given frequency, a bandwidth and a given instant t, the said values being chosen as a function of a transmitter device of interest characterized by its frequency, its bandwidth, • for an acquisition: • calculating the N(N-1)/2 measurements of arrival time delay TDOA between all the N(N-1)/2 pairs of stations, • choosing a number P of measurements out of the M=N(N-1)/2 measurements, with 3<P<N(N-1)/2 and forming K vectors of measurements associated with the K possible combinations of P out of M with: K = M ! P ! M − P ! • for each of the K vectors, estimating an elementary value of location of the transmitter device by minimizing a quadratic criterion taking into account a matrix corresponding to the covariance of the P measurements of arrival time delay and by iteration starting from a first value of a vector X 0 of initial position of the transmitter, the position is situated as near as possible to the desired minimum and then by iterating on the first estimation by successively estimating locations making it possible to decrease the criterion to be minimized until a threshold value is satisfied, • calculating a merged location value on the basis of the estimated values of elementary location. • calculating the N(N-1)/2 measurements of arrival time delay TDOA between all the N(N-1)/2 pairs of stations, • choosing a number P of measurements out of the M=N(N-1)/2 measurements, with 3<P<N(N-1)/2 and forming K vectors of measurements associated with the K possible combinations of P out of M with: K = M ! P ! M − P ! • for each of the K vectors, estimating an elementary value of location of the transmitter device by minimizing a quadratic criterion taking into account a matrix corresponding to the covariance of the P measurements of arrival time delay and by iteration starting from a first value of a vector X 0 of initial position of the transmitter, the position is situated as near as possible to the desired minimum and then by iterating on the first estimation by successively estimating locations making it possible to decrease the criterion to be minimized until a threshold value is satisfied, • calculating a merged location value on the basis of the estimated values of elementary location.