Journal article
Identification and Removal of Reaction Wheel Interference From In-Situ Magnetic Field Data Using Multichannel Singular Spectrum Analysis
Journal of geophysical research. Space physics, Vol.128(2), e2022JA031020
02/01/2023
DOI: 10.1029/2022JA031020
Abstract
In situ magnetic field measurements are critical to our understanding of a variety of space physics phenomena including field-aligned currents and plasma waves. Unfortunately, high-fidelity magnetometer measurements are often degraded by stray magnetic fields from the host spacecraft, its subsystems, and other instruments. One dominant source of magnetic interference on many missions are reaction wheels-spinning platters of varying rates used to control spacecraft attitude. This manuscript presents a novel approach to the mitigation of reaction wheel interference on magnetometer measurements aboard spacecraft where multiple magnetometer sensors are deployed. Specifically, multichannel singular spectrum analysis is employed to decompose multiple time series simultaneously. A technique for automatic component selection is proposed that classifies the decomposed signals into common geophysical signals and disparate locally generated signals enabling the robust estimation and removal of the local interference without requiring any assumptions about its characteristics or source. The utility of this proposed method is demonstrated empirically using in situ data from the CASSIOPE/Swarm-Echo mission, and a data interval with near-constant background field was shown to have its local reaction wheel interference reduced from 1.90 nT RMS, for the uncorrected outboard sensor, to 0.21 nT RMS (an 89.0% reduction). This technique can be generalized to arrays of more than two sensors, and should apply to additional types of magnetic interference.
Details
- Title: Subtitle
- Identification and Removal of Reaction Wheel Interference From In-Situ Magnetic Field Data Using Multichannel Singular Spectrum Analysis
- Creators
- Matthew G. Finley - University of IowaRobert M. Broadfoot - University of IowaSapna Shekhar - University of IowaDavid M. Miles - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.128(2), e2022JA031020
- DOI
- 10.1029/2022JA031020
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Publisher
- Amer Geophysical Union
- Number of pages
- 19
- Grant note
- European Space Agency's Third Party Mission Program FA9550-21-1-0206 / US Air Force Office of Scientific Research; United States Department of Defense; Air Force Office of Scientific Research (AFOSR)
- Language
- English
- Date published
- 02/01/2023
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429015402771
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