Method of measurement by atomic interferometry, in which each session of measurements is executed with at least two sets of atoms (11, 12) each subjected to conditions of formation of atomic interference, the atoms of each set of atoms (11, 12) being of a species dedicated to said set of atoms and different from the species of atoms of each other set of atoms, method in which, for each session of measurements, said conditions are produced for each set of atoms (11, 12) throughout a volume that is associated with said set of atoms and that contains at least one point in common with the volume associated with each other set of atoms, and are produced between a start time point and an end time point respectively before and after an intermediate time point common to all the sets of atoms, and in which a measurement result (P 11, P 12) is obtained in each session of measurements independently for each set of atoms (11, 12), each measurement result varying according to a first function of a total phase shift that appeared for the corresponding set of atoms during formation of the atomic interference, said total phase shift comprising a sum of a second function of an external parameter (a) a value of which is sought and of a constant phase shift that is undergone by the corresponding set of atoms during said formation of the atomic interference, the method being characterized in that it comprises the following steps: /1/ during a session of measurements, applying a value for at least one operating parameter, called internal parameter and making it possible to control a difference between the constant phase shifts to which the two sets of atoms are respectively subjected, the value applied for said at least one internal parameter being such that a difference between the total phase shifts that the two sets of atoms (11, 12) undergo, respectively, is between Π/4 and 3Π/4, in absolute value and modulo Π; /2/ for each measurement result (P 11, P 12) obtained for one of the sets of atoms (11, 12) in said session of measurements, determining a derivative value of said measurement result with respect to the external parameter (a), said derivative being evaluated for said measurement result; /3/ selecting that one of the sets of atoms (11, 12) for which the derivative value determined in step /2/ is largest in absolute value; and /4/ calculating the value of the external parameter (a) from the measurement result (P 11, P 12) obtained in step /2/ for the set of atoms selected in step /3/. /1/ during a session of measurements, applying a value for at least one operating parameter, called internal parameter and making it possible to control a difference between the constant phase shifts to which the two sets of atoms are respectively subjected, the value applied for said at least one internal parameter being such that a difference between the total phase shifts that the two sets of atoms (11, 12) undergo, respectively, is between Π/4 and 3Π/4, in absolute value and modulo Π; /2/ for each measurement result (P 11, P 12) obtained for one of the sets of atoms (11, 12) in said session of measurements, determining a derivative value of said measurement result with respect to the external parameter (a), said derivative being evaluated for said measurement result; /3/ selecting that one of the sets of atoms (11, 12) for which the derivative value determined in step /2/ is largest in absolute value; and /4/ calculating the value of the external parameter (a) from the measurement result (P 11, P 12) obtained in step /2/ for the set of atoms selected in step /3/.