TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 58 (No. 6), pp. 707-710, 2006

Measurement quality estimation of proton-precession magnetometers

A. Y. Denisov1, O. V. Denisova1, V. A. Sapunov1, and S. Y. Khomutov2

1Quantum Magnetometry Laboratory of USTU, Mira st., 19, Ekaterinburg, 620002, Russia
2Geophysical Observatory "Klyuchi", Geophysical Survey SB RAS, Koptyug av., 3, Novosibirsk, 630090, Russia

(Received April 29, 2005; Revised January 20, 2006; Accepted January 21, 2006; Online published June 2, 2006)

Abstract: A method for calculating quality estimation of the magnetic field value measured by proton-precession magne-tometers from data of single measurement is presented. This method is appropriate for frequency measurement algorithms which process time-series of signal s zero crossing. Expressions for measurement error estimation are obtained taking into account signal decay and correlated noise. Presented formulas allow a result reliability to be estimated immediately in single measurement and give an opportunity for complex control of a device perfor-mance. Correlation and relaxation corrections are given. It was experimentally tested that the standard deviation of measurements is in a good qualitative agreement with presented error estimation.
Key words: Proton Overhauser Magnetometer, magnetic observatory instrumentation, measurement quality.

Corresponding author E-mail: sva@dpt.ustu.ru

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