Preprints
https://doi.org/10.5194/egusphere-2022-220
https://doi.org/10.5194/egusphere-2022-220
25 Apr 2022
 | 25 Apr 2022

Tesseract – A High-Stability, Low-Noise Fluxgate Sensor Designed for Constellation Applications

Kenton Greene, Christian Hansen, B. Barry Narod, Richard Dvorsky, and David M. Miles

Abstract. Accurate high-precision magnetic field measurements are a significant challenge for many applications including constellation missions studying space plasmas. Instrument stability and orthogonality are essential to enable meaningful comparison between disparate satellites in a constellation without extensive cross-calibration efforts. Here we describe the design and characterization of Tesseract – a fluxgate magnetometer sensor designed for low-noise, high-stability constellation applications. Tesseract’s design takes advantage of recent developments in the manufacturing of custom low noise fluxgate cores. Six of these custom racetrack fluxgate cores are securely and compactly mounted within a single solid three-axis symmetric base. Tesseract’s feedback windings are configured as a four-square Merritt coil to create a large homogenous magnetic null inside the sensor where the fluxgate cores are held in near-zero field, regardless of the ambient magnetic field, to improve the reliability of the core magnetization cycle. A Biot-Savart simulation is used to optimize the homogeneity of field generated by the feedback Merritt Coils and was verified experimentally to be homogeneous within 0.42 percent along the racetrack cores’ axes; an improvement thirteen times that of the traditional ring-core sensor design. The thermal stability of the feedback windings is measured using an insulated container filled with dry ice inside a coil system. The sensitivity over temperature of the feedback windings is found to be between 13 ppm/°C and 17 ppm/°C. The sensor’s three axes maintain orthogonality to within at most 0.015 degrees over a temperature range of -45 °C to 20 °C; an improvement at least six times that of the ring-core sensor design. Tesseract’s cores achieve a magnetic noise floor of 5 pT/√Hz at one Hz. Tesseract will be flight demonstrated on the ACES-II sounding rockets, currently scheduled to launch in late 2022 and again aboard the TRACERS satellite mission as part of the MAGIC technology demonstration which is currently scheduled to launch in 2023.

Journal article(s) based on this preprint

23 Aug 2022
Tesseract – a high-stability, low-noise fluxgate sensor designed for constellation applications
Kenton Greene, Christian Hansen, B. Barry Narod, Richard Dvorsky, and David M. Miles
Geosci. Instrum. Method. Data Syst., 11, 307–321, https://doi.org/10.5194/gi-11-307-2022,https://doi.org/10.5194/gi-11-307-2022, 2022
Short summary

Kenton Greene et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-220', Mark Moldwin, 10 May 2022
    • AC2: 'Reply on RC1', Kenton Greene, 16 Jul 2022
  • RC2: 'Comment on egusphere-2022-220', Hans-Ulrich Auster, 10 May 2022
    • AC3: 'Reply on RC2', Kenton Greene, 18 Jul 2022
  • RC3: 'Comment on egusphere-2022-220', Anonymous Referee #3, 23 May 2022
    • AC1: 'Reply on RC3', Kenton Greene, 28 Jun 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-220', Mark Moldwin, 10 May 2022
    • AC2: 'Reply on RC1', Kenton Greene, 16 Jul 2022
  • RC2: 'Comment on egusphere-2022-220', Hans-Ulrich Auster, 10 May 2022
    • AC3: 'Reply on RC2', Kenton Greene, 18 Jul 2022
  • RC3: 'Comment on egusphere-2022-220', Anonymous Referee #3, 23 May 2022
    • AC1: 'Reply on RC3', Kenton Greene, 28 Jun 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Kenton Greene on behalf of the Authors (19 Jul 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (22 Jul 2022) by Valery Korepanov
AR by Kenton Greene on behalf of the Authors (23 Jul 2022)  Author's response   Manuscript 

Journal article(s) based on this preprint

23 Aug 2022
Tesseract – a high-stability, low-noise fluxgate sensor designed for constellation applications
Kenton Greene, Christian Hansen, B. Barry Narod, Richard Dvorsky, and David M. Miles
Geosci. Instrum. Method. Data Syst., 11, 307–321, https://doi.org/10.5194/gi-11-307-2022,https://doi.org/10.5194/gi-11-307-2022, 2022
Short summary

Kenton Greene et al.

Kenton Greene et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The ability to make reliable magnetic measurements in space is very important for a broad range of applications in space science. Here, we present the design and performance of a new magnetometer that looks very promising for making stable reliable magnetic measurements in space. We show that the Tesseract performs better than the traditional ring-core design in metrics that are associated with stability.