First results of the MAVEN magnetic field investigation

J. E. P Connerney; J. R Espley; G. A DiBraccio; J. R Gruesbeck; R. J Oliversen; D. L Mitchell; J Halekas; C Mazelle; D Brain; B. M Jakosky

doi:10.1002/2015GL065366

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First results of the MAVEN magnetic field investigation

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Peer reviewed

First results of the MAVEN magnetic field investigation

J. E. P Connerney, J. R Espley, G. A DiBraccio, J. R Gruesbeck, R. J Oliversen, D. L Mitchell, J Halekas, C Mazelle, D Brain and B. M Jakosky

Geophysical research letters, Vol.42(21), pp.8819-8827

11/16/2015

DOI: 10.1002/2015GL065366

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Abstract

Two Mars Atmosphere and Volatile EvolutioN magnetic field sensors sample the ambient magnetic field at the outer edge of each solar array. We characterized relatively minor spacecraft‐generated magnetic fields using in‐flight subsystem tests and spacecraft maneuvers. Dynamic spacecraft fields associated with the power subsystem (≤1 nT) are compensated for using spacecraft engineering telemetry to identify active solar array circuits and monitor their electrical current production. Static spacecraft magnetic fields are monitored using spacecraft roll maneuvers. Accuracy of measurement of the environmental magnetic field is demonstrated by comparison with field directions deduced from the symmetry properties of the electron distribution function measured by the Solar Wind Electron Analyzer. We map the bow shock, magnetic pileup boundary, the V × B convection electric field and ubiquitous proton cyclotron, and 1 Hz waves in the ion foreshock region. Key Points We observe, analyze, model, and mitigate spacecraft‐generated magnetic fields Measured field vectors are independently validated using electron analyzer observations We map the Mars magnetosphere, convection electric field, foreshock waves, and magnetotail

bow shock

magnetic fields

magnetometers

magnetosheath

magnetotail

Mars

Details

Title: Subtitle: First results of the MAVEN magnetic field investigation
Creators: J. E. P Connerney - Goddard Space Flight Center
J. R Espley - Goddard Space Flight Center
G. A DiBraccio - Goddard Space Flight Center
J. R Gruesbeck - University of Maryland, College Park
R. J Oliversen - Goddard Space Flight Center
D. L Mitchell - University of California, Berkeley
J Halekas - University of Iowa
C Mazelle - Centre National pour la Recherche Scientifique et Technique (CNRST)
D Brain - University of Colorado Boulder
B. M Jakosky - University of Colorado Boulder
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.42(21), pp.8819-8827
DOI: 10.1002/2015GL065366
ISSN: 0094-8276
eISSN: 1944-8007
Number of pages: 9
Grant note: NASA Postdoctoral Program CNES
Language: English
Date published: 11/16/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984199682302771

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