The paper proposes a modification of earlier mentioned method reduces the number of computing operations and improve the accuracy of estimating the phase shift, which is close to the limit set by the Cramer-Rao inequality. The article also presents the results of numerical modeling of systematic and random errors parametric estimation of the phase shift angle of the proposed method.

Keywords: phase shift quasi-harmonic signal, Cramer-Rao lower band, parametric method

This paper describes a hardware-based and software system parametric estimation of signals. It`s experimental accuracy was achieved measuring the phase difference between the two quasi-harmonic signals at 10 μrad.  

Keywords: parametric analysis, technical diagnostics, the phase difference

The problem of interaction of mutually perpendicular magnetic fields in superconductors is considered. Possibility of use of a nonlinear susceptibility of superconductors for measurement of a magnetic field is shown, the assessment of sensitivity of the cryogenic probe magnetometer is carried out.

Keywords: superconductor, magnetometer, SQUID, cryotron, the crossed magnetic fields, non-linear magnetic, cryogenic probe