A method for determining a time difference between times of arrival of signals at a first receiver and at a second receiver, wherein the first receiver and the second receiver are positioned at different locations, comprising: receiving a first representation of a first signal at a first time of arrival at the first receiver; receiving a second representation of the first signal at a second time of arrival at the second receiver; correlating at least a first time-domain representation of the first signal derived from the first representation of the first signal and a second time-domain representation of the first signal derived from the second representation of the first signal to obtain a first time difference information or correlating at least a first time-domain representation of a second signal derived from a first representation of the second signal received at the first receiver at a third time of arrival and a second time-domain representation of the second signal derived from a second representation of the second signal received at the second receiver at a fourth time of arrival, to obtain the first time difference information; evaluating (270; 870) a phase difference relation between at least a first frequency-domain representation of the first signal derived from the first representation of the first signal and a second frequency-domain representation of the first signal derived from the second representation of the first signal to obtain a second time difference information; and determining the time difference between the first time of arrival of the first signal and the second time of arrival of the first signal based on the first time difference information and the second time difference information, or determining the time difference between the third time of arrival of the second signal and the fourth time of arrival of the second signal based on the first time difference information and the second time difference information, if the first time difference information is obtained by correlating the first and second time-domain representations of the second signal, characterised in that an accuracy parameter is calculated for the first time difference information and wherein the step of evaluating (270; 870) the phase difference relation to obtain the second time difference information is performed only in case the accuracy parameter fulfills an accuracy condition. receiving a first representation of a first signal at a first time of arrival at the first receiver; receiving a second representation of the first signal at a second time of arrival at the second receiver; correlating at least a first time-domain representation of the first signal derived from the first representation of the first signal and a second time-domain representation of the first signal derived from the second representation of the first signal to obtain a first time difference information or correlating at least a first time-domain representation of a second signal derived from a first representation of the second signal received at the first receiver at a third time of arrival and a second time-domain representation of the second signal derived from a second representation of the second signal received at the second receiver at a fourth time of arrival, to obtain the first time difference information; evaluating (270; 870) a phase difference relation between at least a first frequency-domain representation of the first signal derived from the first representation of the first signal and a second frequency-domain representation of the first signal derived from the second representation of the first signal to obtain a second time difference information; and determining the time difference between the first time of arrival of the first signal and the second time of arrival of the first signal based on the first time difference information and the second time difference information, or determining the time difference between the third time of arrival of the second signal and the fourth time of arrival of the second signal based on the first time difference information and the second time difference information, if the first time difference information is obtained by correlating the first and second time-domain representations of the second signal, characterised in that an accuracy parameter is calculated for the first time difference information and wherein the step of evaluating (270; 870) the phase difference relation to obtain the second time difference information is performed only in case the accuracy parameter fulfills an accuracy condition.