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Space magnetometer based on an anisotropic magnetoresistive hybrid sensor
Author(s) -
P. Brown,
Barry J. Whiteside,
T. J. Beek,
Peter T. Fox,
T. S. Horbury,
T. Oddy,
Martin Archer,
J. P. Eastwood,
Dédalo SanzHernández,
J. G. Sample,
E. Cupido,
H. O’Brien,
C. Carr
Publication year - 2014
Publication title -
review of scientific instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 165
eISSN - 1089-7623
pISSN - 0034-6748
DOI - 10.1063/1.4904702
Subject(s) - magnetometer , spacecraft , magnetoresistance , electrical engineering , physics , earth's magnetic field , magnetic field , materials science , computer science , acoustics , engineering , quantum mechanics , astronomy
We report on the design and development of a low resource, dual sensor vector magnetometer for space science applications on very small spacecraft. It is based on a hybrid device combining an orthogonal triad of commercial anisotropic magnetoresistive (AMR) sensors with a totem pole H-Bridge drive on a ceramic substrate. The drive enables AMR operation in the more sensitive flipped mode and this is achieved without the need for current spike transmission down a sensor harness. The magnetometer has sensitivity of better than 3 nT in a 0-10 Hz band and a total mass of 104 g. Three instruments have been launched as part of the TRIO-CINEMA space weather mission, inter-calibration against the International Geomagnetic Reference Field model makes it possible to extract physical signals such as field-aligned current deflections of 20-60 nT within an approximately 45,000 nT ambient field.

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