Highly integrated front-end electronics for spaceborne fluxgate sensors

Magnes, W.; Oberst, M.; Valavanoglou, A.; Hauer, H.; Hagen, Chris; Jernej, I.; Neubauer, H.; Baumjohann, W.; Pierce, David R.; Means, J. D.; Falkner, P.

doi:10.1088/0957-0233/19/11/115801

Cited by 34 publications

(16 citation statements)

References 17 publications

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“…The Magnetometer Front-end ASIC (MFA) was developed in a close cooperation between the IWF magnetometer group and the Fraunhofer Institute for Integrated Circuits (Magnes et al 2008), and is shown in Fig. 6.…”

Section: Digital Fluxgate Magnetometermentioning

confidence: 99%

The Magnetospheric Multiscale Magnetometers

et al. 2014

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The success of the Magnetospheric Multiscale mission depends on the accurate measurement of the magnetic field on all four spacecraft. To ensure this success, two independently designed and built fluxgate magnetometers were developed, avoiding single-point failures. The magnetometers were dubbed the digital fluxgate (DFG), which uses an ASIC implementation and was supplied by the Space Research Institute of the Austrian Academy of Sciences and the analogue magnetometer (AFG) with a more traditional circuit board design supplied by the

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Section: Digital Fluxgate Magnetometermentioning

confidence: 99%

The Magnetospheric Multiscale Magnetometers

et al. 2014

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“…The prototype has outstanding mass and volume characteristics; however, it relies on commercial off-the-shelf components which are not suitable for use in the radiation belts. Magnes et al (2008) describe a highly integrated front-end for a spaceborne fluxgate. The design is very compact, low power and has an excellent parametric radiation tolerance of 170 krad (300 krad functional).…”

Section: M Miles Et Almentioning

confidence: 99%

A radiation hardened digital fluxgate magnetometer for space applications

Miles

Bennest²,

Mann

et al. 2013

Geosci. Instrum. Method. Data Syst.

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Abstract. Space-based measurements of Earth's magnetic field are required to understand the plasma processes responsible for energising particles in the Van Allen radiation belts and influencing space weather. This paper describes a prototype fluxgate magnetometer instrument developed for the proposed Canadian Space Agency's (CSA) Outer Radiation Belt Injection, Transport, Acceleration and Loss Satellite (ORBITALS) mission and which has applications in other space and suborbital applications. The magnetometer is designed to survive and operate in the harsh environment of Earth's radiation belts and measure low-frequency magnetic waves, the magnetic signatures of current systems, and the static background magnetic field. The new instrument offers improved science data compared to its predecessors through two key design changes: direct digitisation of the sensor and digital feedback from two cascaded pulse-width modulators combined with analog temperature compensation. These provide an increase in measurement bandwidth up to 450 Hz with the potential to extend to at least 1500 Hz. The instrument can resolve 8 pT on a 65 000 nT field with a magnetic noise of less than 10 pT/ √Hz at 1 Hz. This performance is comparable with other recent digital fluxgates for space applications, most of which use some form of sigma-delta ( ) modulation for feedback and omit analog temperature compensation. The prototype instrument was successfully tested and calibrated at the Natural Resources Canada Geomagnetics Laboratory.

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“…In fact, we may consider our approach as a modification of phase-sensitive detection for arbitrary time window. Even more generalized approach is used in digital signal processing (DSP) magnetometers [12]- [14]. We believe this is the reason why we did not observed increased noise which is otherwise a common disadvantage of time-domain methods.…”

Section: Pulse Excitationmentioning

confidence: 69%

Linearity of Pulse Excited Coil-Less Fluxgate

Butta

Ripka

2009

IEEE Trans. Magn.

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In this paper, we study the open-loop linearity of pulse excited coil-less fluxgate. Narrow current pulses can be used instead of classical sinewave for the excitation of the coil-less fluxgate. This method has shown several advantages, mainly regarding reduction of power consumption, normally in order of tens of microwatts. The disadvantage is that traditional phase-sensitive detection cannot be used as it results in a very small sensitivity. Using pulse excitation, the output signal is obtained by integrating a part of the positive pulse and a part of the negative pulse, and then summing up the resulting voltages. This process was realized using two boxcar averagers SR 4153. The achieved open-loop linearity error is much higher than for sinewave excitation and it is not sufficient for precise applications. We show that the linearity strongly depends on the symmetry of the two integrating windows. In order to obtain precise timing, we realized an excitation board using PIC microcontrollers, which provides both the pulsing signals for excitation current and the gating signals for integration. Using this board and optimum position of the integrating window, we obtained a 0.6% maximum nonlinearity in 100-T range, which is sufficient for portable compass.

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Highly integrated front-end electronics for spaceborne fluxgate sensors

Cited by 34 publications

References 17 publications

The Magnetospheric Multiscale Magnetometers

The Magnetospheric Multiscale Magnetometers

A radiation hardened digital fluxgate magnetometer for space applications

Linearity of Pulse Excited Coil-Less Fluxgate

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