Modeling the Correction of Small-Sized Rubidium Atomic Clock by a Quantum Magnetometer Under Conditions of Geomagnetic Field Variations

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.