Измерение слабого магнитного поля низких частот на фоне геомагнитных вариаций

Abstract

The possibility of measuring a weak alternating magnetic field of low frequencies in the presence of geomagnetic noise is considered. The lower limits of measurement of weak periodic and non-periodic signals of magnetic induction by a magnetomodulation sensor in the geomagnetic field are estimated. It is shown that the components of the magnetic induction of continuous geomagnetic noise, measured in a narrow frequency band by two sensors with a distance between them more than one meter, are random and independent.