A correlation method for measurement of variable magnetic fields

Details A correlation method for measurement of variable magnetic fields A correlation method for measurement of variable magnetic fields

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976itge...14..106a&link_type=abstract

IEEE Transactions on Geoscience Electronics, vol. GE-14, Apr. 1976, p. 106-114.

Physics

2

Interplanetary Magnetic Fields, Magnetic Measurement, Magnetometers, Nonuniform Magnetic Fields, Satellite-Borne Instruments, Correlators, Magnet Coils, Magnetic Variations, Noise Reduction, Signal To Noise Ratios

Scientific paper

A correlation technique is described which allows a sensible reduction of the noise in power-spectrum measurements of the interplanetary magnetic field by means of the search coil magnetometer. Two sensors are required that detect the same signal. If the noises of the two amplifying channels are uncorrelated, the time-average of the product of the two channel outputs depends on the power of the magnetic field signal, but is not affected by the noises of the two channels. The application of the proposed technique to space-borne instrumentation leads to a relevant reduction in weight and bulk because of the lower sensitivity required from the sensor.

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