Experience from a high-precision gradiometric magnetic survey from the Arctic ice cover

Details Experience from a high-precision gradiometric magnetic survey from the Arctic ice cover Experience from a high-precision gradiometric magnetic survey from the Arctic ice cover

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ge%26ae..32..158a&link_type=abstract

Geomagnetizm i Aehronomiya (ISSN 0016-7940), vol. 32, no. 5, p. 158-161.

Physics

2

Arctic Regions, Geomagnetism, Gradiometers, Magnetic Measurement, Sea Ice, Geomagnetic Pulsations, Magnetometers

Scientific paper

A study is made of geomagnetic field variations recorded in April, 1989 at the SP-30 drifting station (80 deg N, 172 deg E) using quantum magnetometers with a sensitivity of 10 exp -3 nT. It is shown that an essential factor limiting the sensitivity of gradiometric magnetic survey systems is the spatial noncoherence of geomagnetic fluctuations. A small-scale structure is discovered in the geomagnetic field with periods of the order of 100 m. An additional noise source in field gradient measurements is identified which is related to the dynamics of the drifting motion of ice.

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