Determination of the Overhauser magnetometer uncertainty

Abstract

Overhauser magnetometers are the basic instruments for scalar measurements; however, their accuracy is determined at the time of manufacture only. Because of various effects affecting the gyromagnetic ratio of the used fluid or the stability of the oscillators in the circuitry, their accuracy should be verified during the instrument lifetime. Specific methodology of data processing and determination of the Overhauser magnetometer uncertainty is described in this paper.