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Shorting Factor In-Flight Calibration for the Van Allen Probes DC Electric Field Measurements in the Earth\textquoterights Plasmasphere

Satellite-based direct electric field measurements deliver crucial information for space science studies. Yet they require meticulous design and calibration. In-flight calibration of double-probe instruments is usually presented in the most common case of tenuous plasmas, where the presence of an electrostatic structure surrounding the charged spacecraft alters the geophysical electric field measurements. To account for this effect and the uncertainty in the boom length, the measured electric field is multiplied by a paramet ...

Lejosne, Solène; Mozer, F.;

YEAR: 2019     DOI: 10.1029/2018EA000550

DC electric field; double probe instrument; electric drift; plasmasphere; shorting factor; Van Allen Probes


Magnetic activity dependence of the electric drift below L=3

More than two years of magnetic and electric field measurements by the Van Allen Probes are analyzed with the objective of determining the average effects of magnetic activity on the electric drift below L=3. The study finds that an increase in magnetospheric convection leads to a decrease in the magnitude of the azimuthal component of the electric drift, especially in the night-side. The amplitude of the slowdown is a function of L, local time MLT, and Kp, in a pattern consistent with the storm-time dynamics of the ionosphe ...

Lejosne, ène; Mozer, F.;

YEAR: 2018     DOI: 10.1029/2018GL077873

electric drift; electric field; Inner radiation belt; ionospheric disturbance dynamo; plasmasphere; subcorotation; Van Allen Probes


Typical values of the electric drift E \texttimes B / B 2 in the inner radiation belt and slot region as determined from Van Allen Probe measurements

The electric drift E \texttimes B/B2 plays a fundamental role for the description of plasma flow and particle acceleration. Yet it is not well-known in the inner belt and slot region because of a lack of reliable in situ measurements. In this article, we present an analysis of the electric drifts measured below L ~ 3 by both Van Allen Probes A and B from September 2012 to December 2014. The objective is to determine the typical components of the equatorial electric drift in both radial and azimuthal directions. The dependenc ...

Lejosne, ène; Mozer, F.;

YEAR: 2016     DOI: 10.1002/2016JA023613

electric drift; electric field; Inner radiation belt; plasmasphere; subcorotation; Van Allen Probes