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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December 2014
Research Article|
December 24 2014
Space magnetometer based on an anisotropic magnetoresistive hybrid sensor
P. Brown;
P. Brown
a)
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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B. J. Whiteside
;
B. J. Whiteside
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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T. J. Beek;
T. J. Beek
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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P. Fox;
P. Fox
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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T. S. Horbury;
T. S. Horbury
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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T. M. Oddy;
T. M. Oddy
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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M. O. Archer;
M. O. Archer
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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J. P. Eastwood;
J. P. Eastwood
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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D. Sanz-Hernández;
D. Sanz-Hernández
2EMM-NANO Consortium,
K.U. Leuven
, 3000 Leuven, Belgium
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J. G. Sample;
J. G. Sample
3Space Sciences Laboratory,
University of California
, Berkeley, California 94720, USA
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E. Cupido;
E. Cupido
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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H. O’Brien;
H. O’Brien
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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C. M. Carr
C. M. Carr
1Blackett Laboratory,
Imperial College London
, London SW7 2BW, United Kingdom
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Rev. Sci. Instrum. 85, 125117 (2014)
Article history
Received:
June 13 2014
Accepted:
December 07 2014
Citation
P. Brown, B. J. Whiteside, T. J. Beek, P. Fox, T. S. Horbury, T. M. Oddy, M. O. Archer, J. P. Eastwood, D. Sanz-Hernández, J. G. Sample, E. Cupido, H. O’Brien, C. M. Carr; Space magnetometer based on an anisotropic magnetoresistive hybrid sensor. Rev. Sci. Instrum. 1 December 2014; 85 (12): 125117. https://doi.org/10.1063/1.4904702
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