The paper analyzes the effect of geomagnetic variations on the results of measuring the coordinates of a moving point magnetic dipole using signals from a laboratory quantum gradiometer in the form ...of two M Z -type quantum magnetometers with an optical lamp pumping. It is shown that geomagnetic field variations within the laboratory are random and do not depend on the location coordinates of the magnetometers. In addition, the paper discusses the proposed method for determining the distance from the sensitive magnetometer sensor to the magnetic dipole.
The paper presents the results of modeling the correction of small-sized onboard rubidium atomic clock according to the signal of a quantum magnetometer, the readings of which exactly correspond to ...variations in the external magnetic field installed near the onboard atomic clock and registering both the magnitude and direction of the geomagnetic field in a moving carrier. Various variants of modulation of the external magnetic field are considered and the time dependences of the Allan deviation for these variants are constructed. The correlation coefficients corresponding to variations in the frequency of atomic clock and the readings of a quantum magnetometer are calculated, and the possibility of compensating fluctuations in the frequency of atomic clock caused by a change in the orientation of the carrier in geomagnetic space is demonstrated.
In the paper, the results of a study of the influence of the magnetic shield magnetization on the relative frequency instability of small-sized rubidium atomic clocks have been presented. The atomic ...clock was placed in a rotating magnetic field, simulating the magnetic situation in the orbit of a navigation satellite, moving in orbit and rotating around its own axis. The magnetization of the magnetic shield of the atomic clock was shown to increase its shielding factor. This result makes it possible to significantly reduce the influence of geomagnetic field variations on the frequency stability of onboard atomic clocks.
