Space magnetometer based on an anisotropic magnetoresistive hybrid sensor

作者：Brown P^*; Whiteside B J; Beek T J; Fox P; Horbury T S; Oddy T M; Archer M O; Eastwood J P; Sanz Her***ez D; Sample J G; Cupido E; O'Brien H; Carr C M

来源：Review of Scientific Instruments, 2014, 85(12): 125117.

DOI：10.1063/1.4904702

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, intercalibration 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.

• 出版日期2014-12