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In-Flight Calibration Methods for Temperature-Dependent Offsets in the MMS Fluxgate MagnetometersDuring the first dayside season of the Magnetospheric Multiscale (MMS) mission, the in-flight calibration process for the Fluxgate magnetometers (FGM) implemented an algorithm that selected a constant offset (zero-level) for each sensor on each orbit. This method was generally able to reduce the amplitude of residual spin tone to less than 0.2 nT within the region of interest. However, there are times when the offsets do show significant short-term variations. These variations are most prominent in the nighttime season (phase 1X), when eclipses are accompanied by offset changes as large as 1 nT. Eclipses are followed by a recovery period as long as 12 hours where the offsets continue to change as temperatures stabilize. Understanding and compensating for these changes will become critical during Phase 2 of the mission in 2017, when the nightside will become the focus of MMS science. Although there is no direct correlation between offset and temperature, the offsets are seen for the period of any given week to be well-characterized as function of instrument temperature. Using this property, a new calibration method has been developed that has proven effective in compensating for temperature-dependent offsets during phase 1X of the MMS mission and also promises to further refine calibration quality during the dayside season.
Document ID
20160014711
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Bromund, K. R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Plaschke, F. (Space Research Inst. Graz, Austria)
Strangeway, R. J. (California Univ. Los Angeles, CA, United States)
Anderson, B. J. (Johns Hopkins Univ. Baltimore, MD, United States)
Huang, B. G. (Adnet Systems, Inc. Greenbelt, MD, United States)
Magnes, W. (Space Research Inst. Graz, Austria)
Fischer, D. (Space Research Inst. Graz, Austria)
Nakamura, R. (Space Research Inst. Graz, Austria)
Leinweber, H. K. (California Univ. Los Angeles, CA, United States)
Russell, C. T. (California Univ. Los Angeles, CA, United States)
Baumjohann, W. (Space Research Inst. Graz, Austria)
Chutter, M. (New Hampshire Univ. Dover, NH, United States)
Torbert, R. B. (New Hampshire Univ. Dover, NH, United States)
Le, G. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Slavin, J. A. (Michigan Univ. Ann Arbor, MI, United States)
Kepko, E. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
December 19, 2016
Publication Date
December 12, 2016
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN37989
Meeting Information
Meeting: 2016 American Geophysical Union (AGU) Fall Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 12, 2016
End Date: December 16, 2016
Sponsors: American Geophysical Union
Funding Number(s)
CONTRACT_GRANT: NNG12PL17C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Magnetic field reconnection
Electromagnetic field measurements

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